Уточнить поиск
Результаты 321-330 из 3,332
SELECTIVITY OF SAFLUFENACIL APPLIED SINGLY AND IN COMBINATION WITH GLYPHOSATE ON COFFEE AND CITRUS CROPS Полный текст
2016
CLEBSON GOMES GONÇALVES | ANTONIO CARLOS DA SILVA JUNIOR | MARIA RENATA ROCHA PEREIRA | SIDNEI ROBERTO MARCHI | DAGOBERTO MARTINS
Saflufenacil is absorbed by the plant leaves and roots, thus the residual permanence of this herbicide can cause losses to the crop plants. Therefore, the objective of this study was to evaluate the selectivity of the saflufenacil herbicide, applied singly and in combination with glyphosate, on coffee and citrus plants grown in a sandy soil. Two experiments were implemented and conducted in completely randomized design with four replications. The chemical treatments consisted of three sequential applications, with directed spraying of saflufenacil at rates of 0.035, 0.07 and 0.105 kg a.i. ha - 1 , glyphosate at rate of 2.160 kg a.e. ha - 1 , the two herbicides combined at the same rates, and a control without chemical treatment. The saflufenacil applied singly and in combination with glyphosate was selective for coffee and citrus plants, which presented no visual toxicity symptoms. The sequential application of saflufenacil, singly and in combination with glyphosate did not affect the growth of coffee and citrus plants. The saflufenacil has potential for use, in combination with glyphosate on controlling many weed species in coffee and citrus areas without any interference on the development of these species.
Показать больше [+] Меньше [-]PLASTIC COVERING, PLANTING DENSITY, AND PRUNNING IN THE PRODUCTION OF CAPE GOOSEBERRY (Physalis peruviana L.) IN SUBTROPICAL REGION Полный текст
2016
PEDRO HENRIQUE ABREU MOURA | GIVAGO COUTINHO | RAFAEL PIO | FLÁVIO GABRIEL BIANCHINI | PAULA NOGUEIRA CURI
Physalis peruviana L. is a perennial plant, but commonly referred as annual in commercial crops. The cultivation of this species might be successful in Brazilian subtropical areas with an adequate and planned management. The objective of the present study was to quantify the production of Physalis peruviana L. with or without plastic covering over plant canopies, using two planting densities, managing the number of stems, and pruning side stems. This study was divided in two experiments; the first experiment evaluated the effect of spacing between each plant and the use of plastic covering in fruit production. The second experiment investigated the effect of the number of productive stems and of pruning in fruit production. The experimental design used for both experiments was randomized blocks, in 2 x 2 factorial scheme, which contained 6 blocks and 10 plants per plot. The following were analyzed for both experiments: production variables, estimated production, number of fruits per plant, mean fruit mass, mean fruit length and diameter, and chlorophyll relative index. Plastic covering and number of stems did not influence fruit production. The 3.0 x 0.5 m spacing without pruning side stems provided a larger production.
Показать больше [+] Меньше [-]SQUAMOUS CELL CARCINOMA IN OVINES IN THE STATE OF ACRE Полный текст
2016
EDUARDO MITKE BRANDÃO REIS | RENAN DE MELLO SPADETTO | SARA LUCENA DE AMORIM | GRAZIELA BARIONI | FELIPE BERBARI NETO
SQUAMOUS CELL CARCINOMA IN OVINES IN THE STATE OF ACRE Полный текст
2016
EDUARDO MITKE BRANDÃO REIS | RENAN DE MELLO SPADETTO | SARA LUCENA DE AMORIM | GRAZIELA BARIONI | FELIPE BERBARI NETO
The squamous cells carcinoma (SCC), also known as epidermoid carcinoma, is a malign neoplasia of the squamous layer of the skin’s epidermis, very common in bovines of tropical countries such as Brazil, due to the chronic exposure of animals to ultraviolet radiation. The objective of this work was to describe SCC cases in sheep ( Ovis aries ), because it is known that this disease is rare in this species. A standard animal of approximately six years old was assisted in the municipality of Rio Branco, State of Acre, in Brazil, presenting cachectic state and multifocal tumors. Despite the rarity of this neoplasia in sheep, it is important to use preventive measures, such as: avoiding acquisition of depigmented animals, with absent or sparse fur coverage and, mainly avoiding prolonged exposure to ultraviolet lights, which could cause the appearance of this morbid disease.
Показать больше [+] Меньше [-]SQUAMOUS CELL CARCINOMA IN OVINES IN THE STATE OF ACRE Полный текст
2016
REIS, EDUARDO MITKE BRANDÃO | SPADETTO, RENAN DE MELLO | AMORIM, SARA LUCENA DE | BARIONI, GRAZIELA | BERBARI NETO, FELIPE
ABSTRACT: The squamous cells carcinoma (SCC), also known as epidermoid carcinoma, is a malign neoplasia of the squamous layer of the skin's epidermis, very common in bovines of tropical countries such as Brazil, due to the chronic exposure of animals to ultraviolet radiation. The objective of this work was to describe SCC cases in sheep (Ovis aries ), because it is known that this disease is rare in this species. A standard animal of approximately six years old was assisted in the municipality of Rio Branco, State of Acre, in Brazil, presenting cachectic state and multifocal tumors. Despite the rarity of this neoplasia in sheep, it is important to use preventive measures, such as: avoiding acquisition of depigmented animals, with absent or sparse fur coverage and, mainly avoiding prolonged exposure to ultraviolet lights, which could cause the appearance of this morbid disease. | resumo: O carcinoma de células escamosas (CCE), também conhecido como carcinoma epidermoide, é uma neoplasia maligna da camada escamosa da epiderme da pele, muito comum em bovinos de países tropicais como o Brasil, devido à exposição crônica dos animais à radiação ultravioleta. Objetivou-se com este trabalho descrever caso de CCE em ovino, pois, sabe-se que a doença é rara nesta espécie. O animal SRD, de aproximadamente seis anos de idade, foi atendido no município de Rio Branco, estado do Acre, apresentando estado caquético e tumorações multifocais. Apesar desta neoplasia ser rara em ovinos, é importante fazer uso de medidas de prevenção como: evitar adquirir animais despigmentados, com cobertura de pelos ausentes ou esparsas e principalmente, evitar exposição prolongada à luz ultravioleta, podendo ter como ônus o surgimento desse tipo de processo mórbido.
Показать больше [+] Меньше [-]RESIDUAL ACTIVITY OF HERBICIDES APPLIED TO COTTON ON CROPS CULTIVATED IN SUCCESSION Полный текст
2016
ELIEZER ANTONIO GHENO | RUBEM SILVÉRIO DE OLIVEIRA JUNIOR | JAMIL CONSTANTIN | HUDSON KAGUEYAMA TAKANO | ALEXANDRE GEMELLI
RESIDUAL ACTIVITY OF HERBICIDES APPLIED TO COTTON ON CROPS CULTIVATED IN SUCCESSION Полный текст
2016
ELIEZER ANTONIO GHENO | RUBEM SILVÉRIO DE OLIVEIRA JUNIOR | JAMIL CONSTANTIN | HUDSON KAGUEYAMA TAKANO | ALEXANDRE GEMELLI
Herbicides with high persistence in soil can cause problems for crops sown in succession to their application. Thus, the aim of this study was to estimate, in greenhouse conditions, the safe period of time after application of preemergent herbicides used on cotton crops (isolated or in mixtures) for the crops grown in succession (bean, corn, and soybean). The experimental design was completely randomized in a factorial scheme (5 x 11) + 1, with five repetitions. For each experiment, treatments combined different time periods between herbicide application and sowing of crops (280, 210, 140, 70, and 0 days before sowing of crops) with eleven herbicide treatments: fomesafen (625 g ha - 1 ) prometryne (1250 g ha - 1 ), diuron (1250 g ha - 1 ), S - metolachlor (768 g ha - 1 ), clomazone (1000 g ha - 1 ), fomesafen + prometryne (625 + 1250 g ha - 1 ), fomesafen + diuron (625 + 1250 g ha - 1 ), fomesafen + S - metolachlor (625 + 768 g ha - 1 ), fomesafen + clomazone (625 + 1000 g ha - 1 ), fomesafen + clomazone + diuron (625 + 1000 + 1250 g ha - 1 ), and fomesafen + clomazone + prometryne (625 + 1000 + 1250 g ha - 1 ), plus an untreated control. Applications of diuron showed the greatest persistence, causing the largest carryover effects for the three crops evaluated. The other treatments showed residual effects or affected crop development when sowings were performed up to 70 days after application. At later periods no significant damage was observed.
Показать больше [+] Меньше [-]RESIDUAL ACTIVITY OF HERBICIDES APPLIED TO COTTON ON CROPS CULTIVATED IN SUCCESSION Полный текст
2016
GHENO, ELIEZER ANTONIO | OLIVEIRA JUNIOR, RUBEM SILVÉRIO DE | CONSTANTIN, JAMIL | TAKANO, HUDSON KAGUEYAMA | GEMELLI, ALEXANDRE
ABSTRACT: Herbicides with high persistence in soil can cause problems for crops sown in succession to their application. Thus, the aim of this study was to estimate, in greenhouse conditions, the safe period of time after application of preemergent herbicides used on cotton crops (isolated or in mixtures) for the crops grown in succession (bean, corn, and soybean). The experimental design was completely randomized in a factorial scheme (5 x 11) + 1, with five repetitions. For each experiment, treatments combined different time periods between herbicide application and sowing of crops (280, 210, 140, 70, and 0 days before sowing of crops) with eleven herbicide treatments: fomesafen (625 g ha-1) prometryne (1250 g ha-1), diuron (1250 g ha-1), S-metolachlor (768 g ha-1), clomazone (1000 g ha-1), fomesafen + prometryne (625 + 1250 g ha-1), fomesafen + diuron (625 + 1250 g ha-1), fomesafen + S-metolachlor (625 + 768 g ha-1), fomesafen + clomazone (625 + 1000 g ha-1), fomesafen + clomazone + diuron (625 + 1000 + 1250 g ha-1), and fomesafen + clomazone + prometryne (625 + 1000 + 1250 g ha-1), plus an untreated control. Applications of diuron showed the greatest persistence, causing the largest carryover effects for the three crops evaluated. The other treatments showed residual effects or affected crop development when sowings were performed up to 70 days after application. At later periods no significant damage was observed. | RESUMO: Herbicidas com alta persistência no solo podem causar problemas em culturas semeadas em sucessão a sua aplicação. Desta forma, o objetivo deste trabalho foi estimar, em condições de casa-de-vegetação, o período de tempo seguro após aplicações em pré-emergência de herbicidas utilizados no algodoeiro (isolados ou em misturas) sobre culturas semeadas em sucessão (feijoeiro, milho e soja). O delineamento experimental utilizado foi o inteiramente casualizado, em arranjo fatorial (5 x 11) + 1, com cinco repetições. Em cada experimento (cultura), os tratamentos foram constituídos pela combinação de intervalos de tempo entre aplicação do herbicida e a semeadura das culturas (280, 210, 140, 70 e 0 dia, antes da semeadura das culturas) e onze tratamentos com herbicidas: fomesafen (625 g ha-1) prometryne (1250 g ha-1), diuron (1250 g ha-1), s-metolachlor (768 g ha-1), clomazone (1000 g ha-1), fomesafen + prometryne (625 + 1250 g ha-1), fomesafen + diuron (625 + 1250 g ha-1), fomesafen + s-metolachlor (625 + 768 g ha-1), fomesafen + clomazone (625 + 1000 g ha-1), fomesafen + clomazone + diuron (625 + 1000 + 1250 g ha-1) e fomesafen + clomazone + prometryne (625 + 1000 + 1250 g ha-1) acrescidos de uma testemunha sem aplicação de herbicidas. Constatou-se que as aplicações dos tratamentos contendo diuron apresentaram maior persistência, causando maior efeito carryover para as três culturas. Os demais tratamentos apresentaram efeito residual ou comprometeram o desenvolvimento das culturas quando as semeaduras foram realizadas até 70 dias após as aplicações, nos períodos superiores não foram observados danos significativos.
Показать больше [+] Меньше [-]RESCUE OF Cucurbita spp. GERMPLASM IN RIO GRANDE DO NORTE Полный текст
2016
GRACE KELLY LEITE DE LIMA | MANOEL ABILIO DE QUEIRÓZ | LINDOMAR MARIA DA SILVEIRA
RESCUE OF Cucurbita spp. GERMPLASM IN RIO GRANDE DO NORTE Полный текст
2016
GRACE KELLY LEITE DE LIMA | MANOEL ABILIO DE QUEIRÓZ | LINDOMAR MARIA DA SILVEIRA
Com objetivo de resgatar germoplasma de Cucurbita spp. da agricultura familiar do estado do Rio Grande do Norte, quantificar a variabilidade fenotípica e identificar as principais espécies cultivadas, foram organizadas 17 expedições para coleta de acessos, nos municípios de Baraúna, Rio do Fogo e Touros (principais fornecedores de frutos para o comercio estadual) e de mais oito municípios de diferentes microrregiões do Estado (Apodi, Caraúbas, Ceará Mirim, Cerro Corá, Currais Novos, João Câmara, Lagoa Nova e Macaíba). Cada acesso coletado foi composto por um fruto ou aproximadamente vinte sementes fornecidas pelo próprio agricultor. Todos os acessos foram identificados quanto à espécie botânica e realizados os procedimentos de acondicionamento, identificação e armazenamento das sementes em câmara fria para preservação do material. Uma amostra dos acessos coletados como frutos e uma pequena parte dos acessos obtidos como sementes da espécie C. moschata foram multiplicados usando-se autofecundação das plantas. Plantas e frutos foram caracterizados preliminarmente com auxílio de descritores morfológicos. Resgatou-se acessos em todos os municípios visitados, sendo 112 de C. moschata e 50 de C. maxima. Verificou-se predominância do cultivo da espécie C. moschata bem como constatou-se grande variabilidade para vários descritores de planta e fruto nos acessos que foram caracterizados.
Показать больше [+] Меньше [-]RESCUE OF Cucurbita spp. GERMPLASM IN RIO GRANDE DO NORTE Полный текст
2016
LIMA, GRACE KELLY LEITE DE | QUEIRÓZ, MANOEL ABILIO DE | SILVEIRA, LINDOMAR MARIA DA
RESUMO: Com objetivo de resgatar germoplasma de Cucurbita spp. da agricultura familiar do estado do Rio Grande do Norte, quantificar a variabilidade fenotípica e identificar as principais espécies cultivadas, foram organizadas 17 expedições para coleta de acessos, nos municípios de Baraúna, Rio do Fogo e Touros (principais fornecedores de frutos para o comercio estadual) e de mais oito municípios de diferentes microrregiões do Estado (Apodi, Caraúbas, Ceará Mirim, Cerro Corá, Currais Novos, João Câmara, Lagoa Nova e Macaíba). Cada acesso coletado foi composto por um fruto ou aproximadamente vinte sementes fornecidas pelo próprio agricultor. Todos os acessos foram identificados quanto à espécie botânica e realizados os procedimentos de acondicionamento, identificação e armazenamento das sementes em câmara fria para preservação do material. Uma amostra dos acessos coletados como frutos e uma pequena parte dos acessos obtidos como sementes da espécie C. moschata foram multiplicados usando-se autofecundação das plantas. Plantas e frutos foram caracterizados preliminarmente com auxílio de descritores morfológicos. Resgatou-se acessos em todos os municípios visitados, sendo 112 de C. moschata e 50 de C. maxima. Verificou-se predominância do cultivo da espécie C. moschata bem como constatou-se grande variabilidade para vários descritores de planta e fruto nos acessos que foram caracterizados. | ABSTRACT: In order to rescue Cucurbita spp. germplasm from family farming in the state of Rio Grande do Norte, to quantify the phenotypic variability and identify the main species grown, 17 expeditions were organised to collect accessions in the municipalities of Baraúna, Rio do Fogo and Touros (major fruit suppliers to the state trade) and in eight more municipalities in different regions of the state (Apodi, Caraúbas, Ceará Mirim, Cerro Corá, Currais Novos, João Câmara, Lagoa Nova and Macaíba). Each collected accession consisted of a fruit or about 20 seeds provided directly by the farmer. All accessions were identified according to botanical species, and packaging procedures, identification and seed storage in the cold for preservation were performed. A sample of collected accessions, consisting of fruit and a small number of accessions obtained as C. moschata seeds, was multiplied using self-fertilisation of plants. Plants and fruits were characterised preliminarily with the aid of morphological descriptors. Accessions were rescued in all visited municipalities - 112 of C. moschata and 50 of C. maxima. There was a predominance of C. moschata species cultivation, and great variability was found in various plant and fruit descriptors in the accessions characterised.
Показать больше [+] Меньше [-]GENETIC DIVERGENCE AND MORPHO - AGRONOMIC PERFORMANCE OF JATROPHA CURCAS L. CLONES FOR SELECTION OF CLONAL VARIETIES Полный текст
2016
ADRIANA QUEIROZ DE ALMEIDA | SIMONE ALVES SILVA | VANESSA DE OLIVEIRA ALMEIDA | DEOCLIDES RICARDO DE SOUZA | GILMARA DE MELO ARAÚJO
The knowledge about genetic diversity of jatropha crop is important for genetic conservation resources and breeding of this species. The aim of this study was to evaluate the genetic diversity and performance of jatropha clones through morphological characterization to selection of clonal varieties for biofuels production. The clones were obtained through shoot cuttings from previous selection in a population of half - sibs progenies. The morphoagronomic analyses of clones was carried out at 180 days after transplantation and were evaluated plant height, stem diameter, number of primary branches and number of secondary branches, number of bunches and number of fruits per plant. Evaluating clones performance, significant results were found for the number of secondary branches. About analysis of genetic diversity, the measures of dissimilarity genetic varied from 0.62 to 13.11, this way, the UFRBPR14 and UFRBPR15 clones were more divergent. The Tocher method was efficient to verify formation of four groups. The characteristics that most contributed to the divergence among clones were branches number, height and number of bunches, and, stem diameter had lower contribution. The jatropha clones differed only in the secondary branches number and multivariate analysis showed divergence among the jatropha clones with formation of four groups. Also, branches number, plant height and number of bunches were characteristic that contributed to genetic divergence.
Показать больше [+] Меньше [-]CHAMOMILE PRODUCTION USING SUPPLEMENTARY IRRIGATION AND ORGANIC FERTILIZATION IN SANDY SOILS Полный текст
2016
CATARINY CABRAL ALEMAN | PATRICIA ANGÉLICA ALVES MARQUES | ANA CLAUDIA PACHECO
CHAMOMILE PRODUCTION USING SUPPLEMENTARY IRRIGATION AND ORGANIC FERTILIZATION IN SANDY SOILS Полный текст
2016
CATARINY CABRAL ALEMAN | PATRICIA ANGÉLICA ALVES MARQUES | ANA CLAUDIA PACHECO
The use of medicinal plants in the herbal medicine of Brazilian Health System has intensified production and the need for developing efficient agricultural techniques that promote greater productivity of these species. The objective of this work was to evaluate the chamomile production at field conditions as a function of irrigation depths and organic fertilizer rates. The experiment was conducted in the Universidade do Oeste Paulista (Campus II experimental area), in Presidente Prudente, São Paulo State, Brazil. A triple factorial experimental design was used, consisting of irrigation rates (150, 100, 75, 50, 25 and 0% of the reference evapotranspiration - ETo), organic manure types (poultry and cattle manure) and manure rates (0, 3 and 5 kg m-2), with four replications. The capitula production per plant, capitula dry weight and yield per water input (water use efficiency) were evaluated. The supplementary irrigation combined with organic manure fertilization provided the highest capitula yield for chamomile crop in the Presidente Prudente region. The combination of poultry manure at rate of 5 kg m-2 with water depth equal to 150% of the ETo resulted in higher average values of capitula fresh and dry weight and water use efficiency.
Показать больше [+] Меньше [-]CHAMOMILE PRODUCTION USING SUPPLEMENTARY IRRIGATION AND ORGANIC FERTILIZATION IN SANDY SOILS Полный текст
2016
ALEMAN, CATARINY CABRAL | MARQUES, PATRICIA ANGÉLICA ALVES | PACHECO, ANA CLAUDIA
RESUMO: A utilização de plantas medicinais na fitoterapia do Sistema Único de Saúde no Brasil tem intensificado o cultivo e a necessidade de desenvolvimento de técnicas agronômicas eficientes para promover maior produtividade destas espécies. O objetivo do presente trabalho foi avaliar a produção da camomila a campo em função de lâminas de irrigação e doses de adubo orgânico. O ensaio foi conduzido em área experimental do campus II, da Universidade do Oeste Paulista, na cidade de Presidente Prudente - SP, Brasil. O delineamento experimental foi em esquema fatorial triplo, sendo composto por lâminas de irrigação (150, 100, 75, 50, 25 e 0% da evapotranspiração de referência - ETo), tipos de adubo orgânico (esterco de aves e esterco bovino curtido) e doses do adubo (0, 3 e 5 kg m-2), em quatro repetições. Foram avaliadas a produção de capítulos florais por planta, a massas seca dos capítulos florais e a produtividade da água. Para a região de Presidente Prudente, a irrigação suplementar combinada à adubação orgânica, proporcionaram maior produção de capítulos florais. A combinação de esterco de aves na dose de 5 kg m-2 à lâmina de 150% ETo resultou em maiores valores médios de massa fresca e seca de capítulos florais e produtividade da água. | ABSTRACT: The use of medicinal plants in the herbal medicine of Brazilian Health System has intensified production and the need for developing efficient agricultural techniques that promote greater productivity of these species. The objective of this work was to evaluate the chamomile production at field conditions as a function of irrigation depths and organic fertilizer rates. The experiment was conducted in the Universidade do Oeste Paulista (Campus II experimental area), in Presidente Prudente, São Paulo State, Brazil. A triple factorial experimental design was used, consisting of irrigation rates (150, 100, 75, 50, 25 and 0% of the reference evapotranspiration - ETo), organic manure types (poultry and cattle manure) and manure rates (0, 3 and 5 kg m-2), with four replications. The capitula production per plant, capitula dry weight and yield per water input (water use efficiency) were evaluated. The supplementary irrigation combined with organic manure fertilization provided the highest capitula yield for chamomile crop in the Presidente Prudente region. The combination of poultry manure at rate of 5 kg m-2 with water depth equal to 150% of the ETo resulted in higher average values of capitula fresh and dry weight and water use efficiency.
Показать больше [+] Меньше [-]AGRONOMIC EFFICIENCY OF THE INTERCROPPING OF ARUGULA WITH CARROT UNDER DIFFERENT POPULATION COMBINATIONS Полный текст
2016
THAÍZA MABELLE DE VASCONCELOS BATISTA | FRANCISCO BEZERRA NETO | ÍTALO NUNES SILVA | MAIELE LEANDRO DA SILVA | ELIANE QUEIROGA DE OLIVEIRA | AURÉLIO PAES BARROS JÚNIOR
AGRONOMIC EFFICIENCY OF THE INTERCROPPING OF ARUGULA WITH CARROT UNDER DIFFERENT POPULATION COMBINATIONS Полный текст
2016
THAÍZA MABELLE DE VASCONCELOS BATISTA | FRANCISCO BEZERRA NETO | ÍTALO NUNES SILVA | MAIELE LEANDRO DA SILVA | ELIANE QUEIROGA DE OLIVEIRA | AURÉLIO PAES BARROS JÚNIOR
The objective of this study was to evaluate the agronomic efficiency of intercropping combinations of carrot and arugula at different population densities in bicropping in the semi - arid conditions of the Brazilian Northeast. The study was conducted at the "Rafael Fernandes" Experimental Farm of the Universidade Federal Rural do Semi - Árido (UFERSA) during the period September 2011 to February 2012. The experimental design was of randomized complete blocks with treatments arranged in a 4 x 4 factorial scheme with four replications. The combinations were four population densities of carrot (40, 60, 80 and 100% of the recommended population in sole crop – RPSC) with four population densities of arugula (40, 60, 80 and 100% of the RPSC). The recommended population densities for sole crops of carrot and arugula are 500,000 and 1,000,000 plants per hectare, respectively. All treatments were fertilized with hairy woodrose ( Merremia aegyptia L.), a spontaneous species of the Caatinga biome. The highest agronomic efficiency of carrot intercropped with arugula in bicropping was achieved in the combination of 40% of RPSC for the carrot and 100% of RPSC for the arugula. The commercial maximum yield (33.74 t ha - 1 ) of carrot roots and the maximum yields of arugula green mass (8.06 and 2.67 t ha - 1 ) in both cultivations were also obtained in the combination of population densities of 40% of RPSC for carrot and 100% of RPSC for arugula.
Показать больше [+] Меньше [-]AGRONOMIC EFFICIENCY OF THE INTERCROPPING OF ARUGULA WITH CARROT UNDER DIFFERENT POPULATION COMBINATIONS Полный текст
2016
BATISTA, THAÍZA MABELLE DE VASCONCELOS | BEZERRA NETO, FRANCISCO | SILVA, ÍTALO NUNES | SILVA, MAIELE LEANDRO DA | OLIVEIRA, ELIANE QUEIROGA DE | BARROS JÚNIOR, AURÉLIO PAES
RESUMO: O objetivo deste estudo foi avaliar a eficiência agronômica de combinações de cenoura e rúcula em diferentes densidades populacionais em bicultivo nas condições semiáridas do Nordeste brasileiro. O estudo foi realizado na Fazenda Experimental "Rafael Fernandes" da Universidade Federal Rural do Semi-Árido (UFERSA), durante o período de setembro de 2011 a fevereiro de 2012. O delineamento experimental foi de blocos casualizados, com os tratamentos arranjados em esquema fatorial 4 x 4 com quatro repetições. As combinações foram quatro densidades populacionais de cenoura (40, 60, 80 e 100% da população recomendada em cultivo solteiro - PRCS) com quatro densidades populacionais de rúcula (40, 60, 80 e 100% da PRCS). As densidades populacionais recomendadas para os cultivos solteiros de cenoura e rúcula são 500.000 e 1.000.000 de plantas por hectare, respectivamente. Todos os tratamentos foram adubados com jitirana (Merremia aegyptia L.), uma espécie espontânea do bioma Caatinga. A maior eficiência agronômica da cenoura consorciada com a rúcula em bicultivo foi alcançada na combinação populacional de 40% da PRCS da cenoura e 100% da PRCS de rúcula. A produção comercial máxima (33,74 t ha-1) de raízes de cenoura e os rendimentos máximos de massa verde (8,06 e 2,67 t ha-1) de rúcula nos dois cultivos foram obtidos também na combinação de densidades populacionais de 40% da PRCS de cenoura e 100% da PRCS de rúcula. | ABSTRACT: The objective of this study was to evaluate the agronomic efficiency of intercropping combinations of carrot and arugula at different population densities in bicropping in the semi-arid conditions of the Brazilian Northeast. The study was conducted at the "Rafael Fernandes" Experimental Farm of the Universidade Federal Rural do Semi-Árido (UFERSA) during the period September 2011 to February 2012. The experimental design was of randomized complete blocks with treatments arranged in a 4 x 4 factorial scheme with four replications. The combinations were four population densities of carrot (40, 60, 80 and 100% of the recommended population in sole crop - RPSC) with four population densities of arugula (40, 60, 80 and 100% of the RPSC). The recommended population densities for sole crops of carrot and arugula are 500,000 and 1,000,000 plants per hectare, respectively. All treatments were fertilized with hairy woodrose (Merremia aegyptia L.), a spontaneous species of the Caatinga biome. The highest agronomic efficiency of carrot intercropped with arugula in bicropping was achieved in the combination of 40% of RPSC for the carrot and 100% of RPSC for the arugula. The commercial maximum yield (33.74 t ha-1) of carrot roots and the maximum yields of arugula green mass (8.06 and 2.67 t ha-1) in both cultivations were also obtained in the combination of population densities of 40% of RPSC for carrot and 100% of RPSC for arugula.
Показать больше [+] Меньше [-]GENETIC PARAMETER ESTIMATES FOR PRODUCTION AND REPRODUCTION TRAITS IN DAIRY BUFFALOES Полный текст
2016
CAMILA DA COSTA BARROS | RÚSBEL RAUL ASPILCUETA-BORQUIS | ANGELINA BOSSI FRAGA | HUMBERTO TONHATI
The objective of this study was to determine the genetic variation in milk production, milk components, and reproductive traits in dairy buffaloes. A total of 9,318 lactation records from 3,061 cows were used to estimate the heritability of milk yield (MY), fat percentage (%F), protein percentage (%P), lactation length (LL), calving interval (CI), and age at first calving (AFC), as well as genetic and phenotypic correlations between these traits. Covariance components were estimated by Bayesian inference in a multitrait animal model using the GIBBS2F90 program. Contemporary groups and number of milkings (1 or 2) were included as fixed effects, age of dam at calving (linear and quadratic effects) as a covariate, and additive genetic , permanent environmental, and residual effects as random effects. The heritability estimates (± standard deviation) were 0.24 ± 0.02, 0.34 ± 0.05, 0.40 ± 0.05, 0.09 ± 0.01, 0.05 ± 0.01, and 0.16 ± 0.04 for MY, %F, %P, LL, CI, and AFC, respectively. The genetic correlations between MY and %F, %P, LL, CI, and AFC were - 0.29, - 0.18, 0.66, 0.08, and 0.24, respectively. Milk production and milk components showed sufficient genetic variation to obtain genetic gains through selection. The genetic correlations between MY and milk components were negative, and thus, undesirable because efforts to increase MY may decrease milk quality . Reproductive traits had little genetic influence, indicating that improvement of management would be sufficient to obtain better performance.
Показать больше [+] Меньше [-]FONTES ALTERNATIVAS DE PÓLEN UTILIZADAS PELO BICUDO-DO-ALGODOEIRO EM DUAS REGIÕES PRODUTORAS DE ALGODÃO NA BAHIA Полный текст
2015
MACÊDO, JULIANA ALVES DE | CASTELLANI, MARIA APARECIDA | SANTOS, FRANCISCO DE ASSIS RIBEIRO DOS | OLIVEIRA, PAULINO PEREIRA | MALUF, RAQUEL PÉREZ
ABSTRACT: Cotton boll weevil, Anthonomus grandis Boheman (Coleoptera: Curculionidae), is one of the most limiting factors for cotton crop expansion. It presents different biological and behavioral aspects that ensure its success on this agroecosystem. This research aimed to identify pollen sources used by this insect during harvest and intercrop periods of cotton cultivations in Iuiu and Correntina - BA, Brazil; moreover, evaluating Caatinga and Cerrado neighboring areas. Adult insect samplings were made from February to September of 2013, through pheromone traps. Samples were analyzed to identify the pollen types inside the digestive system of insects. The results indicated that the pest explores 22 botanical families as nourishment source, from which 16 in Caatinga and five in Cerrado. Regarding crop samples, eight genera were found in Iuiu and Correntina, being three found in both areas (Angelonia, Mimosa and Myrcia sp.1). Pollen from 26 genera were identified for Caatinga and six for Cerrado, with three genera in common for both (Myrcia sp.2, Eucalyptus, and Mimosa). The boll weevil uses alternative sources of food within the main cotton growing regions in Bahia State, highlighting the Caatinga with most of the botanical families and genera explored by the pest. | RESUMO: O bicudo-do-algodoeiro (Anthonomus grandis Boheman) (Coleoptera: Curculionidae) é um dos principais fatores limitantes para a expansão da cultura do algodão. Ele apresenta diferentes aspectos biológicos e comportamentais que garantem seu sucesso na exploração do agroecossistema algodoeiro. O objetivo deste trabalho foi identificar os recursos alimentares utilizados pelo bicudo na safra e entressafra de cultivos de algodão localizados nos municípios de Iuiu e Correntina (BA) e em ambientes de Caatinga e Cerrado, contíguos aos algodoais, respectivamente. As coletas dos adultos foram realizadas no período de fevereiro a setembro/2013 por meio de armadilhas com feromônio. As amostras foram processadas para identificação dos tipos polínicos encontrados no aparelho digestivo dos insetos. Os resultados indicaram que a praga explora 22 famílias botânicas como fonte de alimento, das quais 16 na Caatinga e 5 no Cerrado. Nos bicudos coletados em algodão foram encontrados 8 gêneros botânicos em Iuiu e 10 em Correntina, sendo apenas três coincidentes aos dois cultivos (Angelonia, Mimosa e Myrcia sp.1). Grãos de Pólen de 26 gêneros de plantas foram identificados para Caatinga e 6 para o Cerrado, ocorrendo três gêneros comuns às duas áreas (Myrcia sp.2, Eucalyptus e Mimosa). O bicudo explora fontes alternativas de alimento nas principais regiões produtoras de algodão da Bahia, com destaque para a Caatinga, que apresenta maior quantidade de famílias e gêneros botânicos utilizados pela praga.
Показать больше [+] Меньше [-]