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النتائج 41 - 50 من 157
ALELOPATIA DO NIM NOS ASPECTOS FISIOLÓGICOS DA GERMINAÇÃO DE SEMENTES DE MARACUJÁ EM DISTINTOS PERÍODOS DE ARMAZENAMENTO
2008
Naedja Nara de Araujo Neves | Tenessee Andrade Nunes | Maria Clarete Cardoso Ribeiro | Glauter Lima Oliveira | Clarisse Pereira Benedito
The passion fruit tree (Passiflora edulis Sims f. flavicarpa Deg.) is a fruitful tree whose the propagation usually is made for seeds. With the objective to study the possible effects allelopathy of neem in the physiologic aspects in germination of seeds of passion fruit in the different periods of storage. Was carried at UFERSA. For the acquisition of powder of neem, it was used plants located in institution. In the obtaining of seeds of passion fruits, it was used in natura fruits bought in the local supermarket; this seeds were extracted of fruits for fermentation. It was placed 50g of seeds of passion fruits together with each measure of powder of leaves of neem (0; 0,25; 0,50; 0,75; 1,0 g of powder of leaves of neem / 50 g of seeds of passion fruits). It was utilized the randomized design in esquire of portions subdivides, where the portions was composed of five dosages of powder of leaves neem.
اظهر المزيد [+] اقل [-]ALIMENTAÇÃO DE NOVILHAS COM SILAGEM DE MILHO OU CANADE- AÇÚCAR CORRIGIDA COM URÉIA - ANÁLISE ECONÔMICA
2008
Adriano Henrique do Nascimento Rangel | José Maurício de Souza Campo | Sebastião de Campos Valadares Filho | Alexandre Paula Braga | Dorgival Morais de Lima Júnior
The objective of this study was to economically compare a corn silage diet supplemented with 1.3 kg/day of concentrate with sugarcane diets supplemented with a 9:1 mixture of urea plus ammonium sulphate and increasing levels o concentrate (1.3, 2.0, or 2.7 kg/day). Twelve Holstein and eight Brown Swiss dairy heifers averaging 176 kg of body weight (BW) in the beginning of the trial were blocked by breed and BW, and within each block, randomly assigned to treatments. Each experimental period lasted 28 days with 21 days for diet adaptation and seven days for data and sample collections. The average prices of feedstuffs in the state of Minas Gerais during the year of 2004 were used in the economical analyses. The sugarcane diet with greatest proportion of concentrate or, forage to concentrate ratio of 45:55 (dry matter basis), can replace corn silage in dairy production systems that plan heifer's birth age close to 24 months of age .
اظهر المزيد [+] اقل [-]RELAÇÃO ENTRE CONDIÇÕES HÍDRICAS E O CRESCIMENTO VEGETAL DA CANA-DE-AÇÚCAR NO MUNICÍPIO ITAMBÉ, PERNAMBUCO
2008
Geber B. de A. Moura | José Swami P. de Melo | Pedro R. Giongo | Mário de A. Lira Júnior | Ana P. N. da Silva
The best period for sugarcane growth for Itambé, Pernambuco, Brazil, was evaluated, based on observed daily precipitation and potential evapotranspiration data, for years classified as "dry", "normal" or "rainy". Potential evapotranspiration monthly values were estimated through Hargreaves methods, and transformed into 10-days period averages. Ten-days period distribution of precipitation, full evapotranspiration and half of potential evapotranspiration are used to characterize sugarcane growth phase, by determination of pre-humid, humid and post-humid periods. Results show that the best period for the growth phase of this culture in Itambé region for dry years is from January 26th to September 28th, with 245 days duration and total precipitation of 822 mm. In normal years, it begins on March 9th and ends on October 5th, with 210 days duration, and precipitation of 1064 mm. For rainy years the best period for sugarcane growth phase begins on February 20th and ends on October 13th, with 235 days duration, and average precipitation of 1426 mm.
اظهر المزيد [+] اقل [-]BIOQUALIDADE DE ÁREA DEGRADADA PELA EXTRAÇÃO DE ARGILA, REVEGETADA COM Eucalyptus spp. E SABIÁ
2008
Quíssila Renata Batista | Marta Simone Mendonça Freitas | Marco Antonio Martins | Cristiane Ferreira da Silva
An experiment was carried out to evaluate the biological and chemical soil quality of a degraded area of clay extraction, after it has been re-vegetate with Eucalyptus spp. and Mimosa caesalpiniifolia, cultivated in single or inter-cropping systems. It was used as soil biological quality indicators the total microbial activity, evaluated by enzymatic method of the hydrolize of the fluoresceína diacetato (FDA) and soil total respiration; and, the diversity of arbuscular mycorrhizal fungi (AMF). To evaluate the chemical quality it was used some chemical characteristics of the soil. The random blocks experimental design was used, with nine treatments + control. The treatments were constituted of single plantings of Mimosa caesalpiniifolia (sabiá) and of four species of eucalyptus (Eucalyptus camaldulensis, Eucalyptus pellita, Eucalyptus tereticornis, Eucalyptus robusta) and intercropping plantings of sábia with the four eucalyptus species, with four repetitions. The control treatment (degraded soil without any re-vegetation) was an area inside of the digging of clay extraction, with four replicates. The experimental unit was composed by 36 plants. After 36 months, the soils with single plantings of E. pellita and sabiá presented, in relation to the control treatment (without vegetation), larger microbial activity, evaluated by both the method of FDA and by total respiration, larger diversity of AMF and larger concentrations of nitrogen. The microbial soil activity, as much for the method of FDA as for the breathing, it was larger in intercropping plantings of E. pellita with sabiá, when compared with the control treatment. The AMF Glomus and Acaulospora were largest genus found in all treatments, however, in the control treatment it was found only the AMF species Glomus macrocarpum.
اظهر المزيد [+] اقل [-]DIVERGÊNCIA GENÉTICA ENTRE ACESSOS DE MAMONA EM DEZ MUNICÍPIOS DE ALAGOAS
2008
Marcelo Cavalcante | Stênio Lopes Paixão | Paulo Vanderlei Ferreira | José Antônio da Silva Madalena | João Gomes da Costa
Aiming to evaluate the genetic divergence among castor bean accessions through collections of racemos with seeds of ten municipalities in the State of Alagoas in the year 2007. The variables were analyzed: weight of 100 seeds (W100), weight of the 100 seed coats (WC100); transversal (TLS) and longitudinal lengths of the seed (LLS); raceme length (LR); e content oil of the seeds (OCS). For the evaluation of genetic divergence was used the principal components analysis and the cluster were made using the Tocher method. Phenotypic correlations between the variable and the altitude (ALT) of the collection places were also carried through. Exist significant divergence between the accessions, indicated for the two first principal components, that explained 82.15% of the existing variability. The variables W100 and WC100 were those that more contributed for the observed divergence. Four groups were formed by Tocher' methodology, showing possibilities of future works to explore the variability found in castor bean accessions. The correlations were positive between some variables, like the altitude, that seems to have especially influenced the W100 variable, but not on OCS.
اظهر المزيد [+] اقل [-]MICORRIZA E RIZÓBIO NO CRESCIMENTO E NUTRIÇÃO EM N E P DE MUDAS DE ANGICO-VERMELHO
2008
Diércules Rodrigues dos Santos | Maria da Conceição Silva Costa | José Romilson Paes de Miranda | Rivaldo Vital dos Santos
The study was carried out greenhouse of the Department of Forestry of the Federal University of Paraíba, Patos, PB. Are am of this study to evaluate the effect of the inoculation with native rhizobia and/or arbuscular mycorrhizal fungi (AMF) of the initial growth of red-angico (Anadenanthera macrocarpa Benth. Bren.), a legume native tree of the great socio-economic and ecological importance in the semi-arid of the Brazilian northeast. The plants grew for 120 days in pots with 4.0 dm3 with a mixture by sand and clay (1:2, v/v). The five treatments consisted: inoculation of AM fungi (Glomus etunicatum Becker & Gerdmann) and/or native rhizobia (NR), previously selected; addition of N (100 mg dm-3) and a control (without N and inoculation). All treatments were significantly higher than the control for seedling height and shoot dry weight, mainly in the treatment with fungi inoculation. Inoculation treatments were able to supply the nutrients (N and P) for growth of A. macrocarpa seedlings ultil 120-days old.
اظهر المزيد [+] اقل [-]ATIVIDADE DE INSETOS EM FLORES DE OCIMUM GRATISSIMUM L. E SUAS INTERAÇÕES COM FATORES AMBIENTAIS
2008
Cláudia Bezerra da Silva Gonçalves | Cristiane Bezerra da Silva | José Hortêncio Mota | Thelma Shirlen Soares
The alfavacão (Ocimum gratissimum L.) is a perennial forb used in the popular medicine and wide found in domestic yards and gardens. In the period of May the June of 2005, investigated aspects of floral biology (anthesis determination, osmophores presence, stigma receptiveness and pollen viability) and the visiting insects of the O. gratissimum in the Horto de Medicinal Plantas of the Universidade Federal da Grande Dourados, in Dourados-MS. It analyzed, also, the reproductive mechanisms and ambient factors in the visits of the insects. It was verified that the flowers of the alfavacão present climax of budding in the period that coincides with the period of higher temperatures, with average percentages of the viable grains of pollen in the daily pay-anthesis, anthesis and after anthesis phases, varied of 94% 98%. The species presented indications of being preferential autogamous, a time that had greater efficiency in the natural auto-pollinization. With relation to the visiting insects visits of eleven different species with predominance of the species of the Apidae family had been observed.
اظهر المزيد [+] اقل [-]USO DE DIFERENTES SUBSTRATOS E DO SUPERFOSFATO SIMPLES NA PRODUÇÃO DE MUDAS DE NESPEREIRA (Eriobotrya japonica Lind)
2008
Vander Mendonça | Gleidson Bezerra Góes | Katchen Julliany Pereira Silva | Thaiza Mabelle de Vasconcelos Batista | Ylana Cláudia Medeiros Paula
It was carried out, in the nursery area located at Campus of Federal University of Lavras (UFLA) Minas Gerais, an experiment aiming to evaluate different doses of simple super phosphate and two substrates in plant production of loquat tree. It was tested four doses of simple super phosphate (0; 2.5; 5; 10 kg m-3 of substrate) and two substrates: A (organic compost + sand + soil in 1:1:3 volume proportion) and B ( Plantmax + sand + soil 1:1:3 volume proportion) A randomized block design was used with a 4 x 2 factorial scheme, with four replications and four plants per plot. The following characteristics were evaluated: high of plants (cm); length of root (cm); number of leaves/plant, dry matter of above ground part, roots and total (g/plant). The results showed that for seedlings of loquat tree, it is recommended to mix to substrate the super phosphate fertilizer in doses until 6 kg m-3. Between the substrates, the one the showed more viable was the substrate A (organic compost + sand + soil in 1:1:3 volume proportions).
اظهر المزيد [+] اقل [-]EFEITO DA SALINIDADE E ADUBOS ORGÂNICOS NO DESENVOLVIMENTO DA RÚCULA
2008
Jucielly Karízia Medeiros da Silva | Francisco de Assis de Oliveira | Patrício Borges Maracajá | Romenique da Silva de Freitas | Luciene Xavier de Mesquita
This work was developed with the objective of evaluating the development of the rocket fertilized with different organic fertilizers and irrigated with water of different salinity levels. The design was used randomized entirely in a factorial scheme 5 x 4, resulting in 20 treatments with 3 repetitions, being the experimental unit acted by a plant/vase. The first factor was composed by 5 levels of salinity of the irrigation water and the second by 4 different compositions of the substrates (S1 - Soil, S2 - Soil + Manure bovine (3: 1), S3 - Soil + Manure ovino/caprino (3: 1) and S4 - Soil + earthworm Humus (3: 1)). They were appraised the number of leaves, leaf area and matter dries of the aerial part. The number of leaves, leaf area and matter dries of the aerial part were reduced with increment of the salinity of the irrigation water. The sources of organic fertilizer studied influenced significantly in the answer of the rúcula the salinity, being an alternative for the cultivation of this vegetable under saline condition. The bovine manure presented the best acting in the development of the plants.
اظهر المزيد [+] اقل [-]USO DE GEOTECNOLOGIAS NO DIAGNÓSTICO DA DEGRADAÇÃO DAS TERRAS DO MUNICÍPIO DE SÃO JOÃO DO CARIRI-PB
2008
Ridelson Farias de Sousa | Marx Prestes Barbosa | Cícero Pereira Cordão Terceiro Neto | Aurean de Paula Carvalho | Antônio Nustenil de Lima
The study area covers all the territory of the municipality of Boa Vista, located in the Microrregião Homogênia dos Cariris Velhos, semi-arid region of the State of Paraíba. The main objective of this study was to elaborate space-temporal thematic maps of the land degradation expansion in the municipality of Boa Vista for the period 1987/2004, based on TM/Landsat-5 image analysis and field work data. The Landsat images digital processing was carried on the SPRING, v.4.2. The results had shown that in the study area are presented degradation levels varying from low to the very serious. The degradation levels very low, low, moderate and serious had their occurrence diminished in 2.59%, 11.80%, 12.86% and 0.88%, respectively during the period since 1987 to 2004. In opposing way, the areas of moderate serious and very serious degradation levels had increased in the period, with increments of 20.14% and 7.65%, respectively. The process of land degradation is more present in the neighborhoods of the rural houses and along the rivers, where the humidity of the ustifluvents soils guarantees better security for dry land agriculture and for the fodder plants for feeding live stocks in dry period. In the municipality the land degradation is resultant of a lack of conservation practical in the use of agricultural soils by the farmers, of a lack of an infrastructure for mitigating the drought effects and of a lack of public polices for a sustainable life in the semi-arid region.
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