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النتائج 61 - 70 من 163
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 [-]ARMAZENAMENTO REFRIGERADO DE MELÃO AMARELO HÍBRIDO FREVO CULTIVADO NO PERÍODO CHUVOSO
2008
Rosemberg Ferreira Senho | Romeu Carvalho Andrade Neto | Pahlevi Augusto de Souza | Josivan Barbosa Menezes | Daniela Silva Salgues de Matos
The Brazilian northeast region is the main melon producer of Brazil, however in the rainy period there is a significant fall in the quality and amount of melon produced. This work aimed to evaluate the quality and the shelf-life of 'Frevo' yellow melon produced rainy time and stored under cold storage. The completely randomized design was used, in factorial scheme 5 x 4, with five replications. The treatments resulted of the combination of five storage times (0, 7, 14, 21 and 28 days) and four storage temperatures (7, 9, 11 and 13 ºC). In each storage time the fruits were analyzed 48 hours after the withdrawal of these of the cold chambers to simulate the market conditions. The evaluated characteristics were flesh firmness, soluble solids, weight loss, chilling injury and internal and external appearances. The fruits kept at 13ºC and 11ºC temperatures had a postharvest shelf-life of 21 days, however, temperatures around 7ºC and 9 ºC favored the development of chilling injury, being apparent at 14º day. The temperatures and the time studied are not determinative for the increase or reduction in the soluble solid content.
اظهر المزيد [+] اقل [-]EFEITO DE FLUAZINAM NO CONTROLE Monosporascus cannonballus, AGENTE CAUSAL DO DECLÍNIO DE RAMAS EM MELOEIRO
2008
Izabel Macedo Guimarães | Rui Sales Junior | Katchen Julliany P. Silva | Sami Jorge Michereff | Diego Rodrigues S. Nogueira
The use of fungicides is a key measure of control used to halt the vine decline in melon by Monosporascus cannonballus. This study aimed to ascertain the effectiveness of the active principles fluazinam and methyl thiophanate in control of M. cannonballus in melon. Melon plants (yellow type) were grown in pot with soil naturally infested with the pathogen. The soil was originated from areas with a history of vine decline in melons. It was used a design in DIC with 10 treatments and 5 replications. The treatments consisted of increasing doses of these active principles alone or in combination. Were utilized two controls: autoclaved soil and naturally infested soil. The parameters analyzed were fresh weight of roots, damage to hypocotyl in primary and secondary roots. The analysis of variance indicated that all treatments that showed the presence of active principle fluazinam differ significantly from other treatments. In addition, the analysis did not indicate differences among the doses used in the experiment. Thus, it appears that this active principle can be recommended at its lowest dose to control the disease once it is properly registered to this crop. It was found phytotoxic effects of the active principle methyl thiophanate in melon plants during this experiment.
اظهر المزيد [+] اقل [-]AVALIAÇÃO DE ATRIBUTOS EDÁFICOS EM ÁREAS DE PASTAGENS EM RELEVO MOVIMENTADO EM ITAPERUNA-RJ
2008
Flávio Couto Cordeiro | Marcos Gervásio Pereira | Lúcia Helena Cunha dos Anjos | Juliano Bahiense Staffanato | Everaldo Zon
The study was carried out in Fazenda Pau Ferro, Itaperuna - RJ, to evaluate soil quality attributes in pastures areas, Braquiária (Brachiaria brizantha (Hochst. ex A. Rich.) Stapf), Suázi (Digitaria swazilandensis Stent) and Tifton 85 (Cynodon spp. cv Tifton 85) cultivated in hill relief. Soil samples were collected at 0-10 and 10 -30 cm depth in two times; dry period (August of 2004, May of 2005 and August of 2005) and in the rainy period (December of 2004) in different sections: at the hillside shoulder (TS), backslope (TM) and footslope (TI) positions. In the samples soil chemical and physical analyses were accomplished. Were evaluated the soil aggregate stability; the bulk density (BD) and the total volume of pores (TVP), total organic carbon (TOC) and soil fertility. To study the multidimensional effect of soil attributes the Principal Component Analysis (PCA) was applied. The pastures areas showed a good aggregation levels, in the different times and depths evaluated. The grasses Tifton 85 and Braquiária propitiated a higher TOC contribution in the depth of 0-10 cm and also larger aggregate weight in the class> 2,0mm, in the dry period. Higher values of BD were observed in the TI. In the rainy period it was observed a BD reduction and TVP increase, mainly for the Suázi areas. In a general way, the positions of the hillside TS and TM were the ones that showed the higher values for the physical and chemical attributes indicating a better soil quality in these areas. In the TI area the lowest levels of soil quality were observed, possibly for the accentuated steepness of this last position of the slope in relation to the other positions. The PCA separated the areas in function of seasonal variation. The dry season presented the higher correlation values with soil quality attributes such as the aggregation indexes and TOC. The aggregate weight distribution in function of the size classes, especially > 2,0 mm, MGD, MWD and TOC were a indicative sensitive to the effects of the treatments, grasses types and seasonal variation.
اظهر المزيد [+] اقل [-]CRESCIMENTO E PRODUÇÃO DO MARACUJAZEIRO-AMARELO EM SOLO COM BIOFERTILIZANTES E ADUBAÇÃO MINERAL COM NPK
2008
Francisco Rodolfo Junior | Lourival Ferreira Cavalcante | Erisvaldo de Sousa Buriti
Yellow passion fruit crop (Passiflora edulis f. flavicarpa Deg.) and natural insume use on agriculture are increasing in Remígio county Paraíba State, Brazil. In this direction was carried out an experiment, during July 2005 to December 2006 in randomized blocks in order to evaluate the effects of absence and presence of biofertilizers comum (bovine manure fertilizer fresh and water) and supermagro (bovine manure, water, macronutrients and micronutrients), applied to soil on liquid form, in level of 2.4 L plant-1, 30 days before and two months after transplanting, in the absence and presence of mineral fertilizer with NPK, with three repetition and six plantas per set using a factorial designs 3x2. The biofertilizers show more reliable to growth than fruit production of yellow passion fruit. Biggest production corresponded to treatments with the use of mineral fertilizer, specially in the first production. Comum and supermagro biofertilizer gave significative effects on vegetative growth of plants of yellow passion fruit plant but had no influence on fruits production.
اظهر المزيد [+] اقل [-]OTIMIZAÇÃO DE PROTOCOLO PARA EXTRAÇÃO DE DNA DE MAYTENUS TRUNCATA REIS
2008
Sandro do Nascimento Silva | Derval Gomes Pereira | Ana Maria Waldschmitd | Ronan Xavier Corrêa
Espinheira Santa (Maytenus truncata Reis) it is a plant used for medicinal ends in the hiperacidez treatment, gastric ulcerations, cutaneous disease as, eczems, constipation and cancers. She possesses properties analgesic, antiseptic and healing, being found in the proximities of Rio de Contas in Jequié - BA. Due to the intense use for the population and exploration for the erveiros, the species is disappearing of the area. With that, it is made to study the species in molecular level seeking to subsidize a strategy of protection of the same. Aiming at to evaluate and to adapt a methodology as tool to be used in studies of molecular biology was tested four protocols of extraction of DNA, and the protocol that obtained the best results in the tests of quantification of DNA in agarose gel and photometer spectrum was it of Ferreira & Grattapaglia (1998) with modifications in the act of the maceration and of the centrifugation. DNA was isolated I integrate and in great been presenting in it measured a degree of purity (A260/A280) in photometer spectrum of 1,78 and a concentration of 1846 ng/ml.
اظهر المزيد [+] اقل [-]ESTRUTURA E FLORÍSTICA DE UM REMANESCENTE FLORESTAL NA FAZENDA RIBEIRÃO, MUNICÍPIO DE JUVENÍLIA, MG, BRASIL
2008
Rubens Manoel dos Santos | Fábio de Almeida Vieira | Paola Ferreira Santos | Verlândia de Medeiros Morais | Maria Aparecida de Medeiros
The area of the extreme North of Minas, due to your character ecotone, involves a large number of physiognomies and floristic complexes, but presumably unknown. Thus, the aim of this research was to determine the structure and the floristic composition of an area of arboreal caatinga in Juvenília, Minas Gerais. Hopes to contribute with information that allow, in the future, that is arrived to a classification it aims at and coherent of this vegetation. A sample of 10 (20x20m) plots was allocated (400m2), distributed on a parallel transect to the largest axis of the fragment, and to each 20 meters in this transect two plots were allocated, distanced 10 meters to each other, totaling 0.4ha. All the individuals were registered with CBH (circumference at breast height) > 10cm. In the structure, 36 species with diversity of H' = 2.4 and eqüability of J' = 0.67 were sampled, values middlemen if compared with results of other works developed at Brazilian deciduous seasonal forests. Acacia martii, Caesalpinia pluviosa, Eugenia uniflora and Tabebuia impetiginosa presented the largest values in all the structural parameters analyzed. This links with the high abundance of those species. The community's diameter distributions tended to the normality with smaller amount of individuals in the classes smaller and larger diametric.
اظهر المزيد [+] اقل [-]COMPOSIÇÃO DO LIXIVIADO EM QUATRO SOLOS DO RIO GRANDE DO NORTE IRRIGADOS COM ÁGUAS SALINAS
2008
Michelangelo de Oliveira Silva | Maria Betânia Galvão dos Santos Freire | Alesandra Monteiro Salviano Mendes | Michelangelo Bezerra Fernandes | Dagmar Alves de Oliveira
In many areas irrigated of the world, water supply of good quality not be enough for the maintenance of the irrigated agriculture, or your cost be elevated, seeking itself alternative with water use of the underground or even of drainage. Generally, these waters are not of good quality and they need to be well managed to avoid the degradation of the soils and damages to the plants. This work objectified evaluate the composition of lixiviate in four soils of Rio Grande do Norte, irrigated with waters of increasing levels of electric conductivity (EC) and sodium adsorption relation (SAR). This work aims to evaluate Assu/Mossoró, RN, agricultural production center soil degradation under irrigation with increasing electrical conductivity (EC) levels, and sodium adsorption rates (RAS), when cultivated with cantaloupe. The work was conducted in a greenhouse at the Environmental Sciences Department of Semi-Arid Rural Federal University. Four soil types, traditionally used for cantaloupe production, were used and irrigated with solutions corresponding to eight EC (EC = 100, 250, 500, 750, 1.250, 1.750, 2.250 and 3.000 ¿S/cm) and two SAR (SAR = 4 and 12) levels, as salinity treatments, corresponding to the irrigation waters used in the Northeast, with low sodification risk, especially in the studied area. So the experiment was a factorial arrangement of 4 x 8 x 2 (four soils, eight EC and two SAR), with three replicates, on a randomized block design. They were evaluated pH and EC, as well as cations and anions soluble of each lixiviate collected of the 10 days after transplanted of the dumb. The use of leaching solutions promoted salt leaching in four studied soils, mainly at Cambissolo and Neossolo.The increase in the concentration of the percolates solutions promoted larger losses of salts, which were crescent with the time of leachate.
اظهر المزيد [+] اقل [-]ESTIMATIVAS DE PARÂMETROS GENÉTICOS PARA PESOS CORPORAIS EM PERDIZES (Rhynchotus rufescens) CRIADAS EM CATIVEIRO
2008
Patrícia Tholon | Eduardo Casellato de Freitas | Sandra Aidar de Queiroz
Currently, the concern on different poultry market has increased and among several native species, partridge, (Rhynchotus rufescens) is good option as source of avian protein, showing excellent carcass performance. The aims of this paper were to study environmental and genetic factors those affect body weight on different ages in partridges, raised in captivity. Data were collected in the Wild Animal Section of Departamento de Zootecnia, located at Faculdade de Ciências Agrárias e Veterinárias (UNESP), at Jaboticabal - SP. Partridges were raised in a commercial avian barn and families were kept using 1 sire to 2 or 5 dams. Mattings were through natural ride. Eggs were collected daily, weighted, measured and identified by box and sire for pedigree control. Chick were identified and weighted at birth and weekly til get 30 weeks of age. Data set had 13,164 weights taken from 2000 to 2004. The statistical analyses were performed by least squares method and heritability estimated y the Maximum likelihood method. The overall means of 3(W3), 7 (W7), 14 (W14), 21 (W21), 28(W28), 35 (W35), 42 (W42), 49 (W49), 56 (W56), 63(W63), 70(W70), 77 (W77), 84 (W84), 91 (W91), 98 (W98), 105 (W105), 112 (W112), 119 (W119), 126 (W126), 133 (W133), 140 (W140), 147 (W147), 154 (W154), 161 (W161), 168 (W168), 175 (W175), 182 (W182), 189 (W189), 196 (W196), 203 (W203) and 210 (W210) days weight were 38.92g, 52.23g, 76.40g, 105.61g, 137.79g, 208.38g, 208.56g, 249.99g, 293.71g, 335.45g, 373.86g, 408.53g, 440.83g, 467.92g, 503.29g, 522.36g, 548.70g, 564.21g, 582.71g, 593.59g, 603.69g, 613.85g, 629.08g, 642.44g, 637.03g, 646.91g, 637.81g, 653.86g, 662.63, 663.19g and 667.385, respectively. The estimates of heritability to egg weight and weight at birth showed large genetic variability among birds and selection for weight at these ages could be done. The genetic and environmental effects are difficult to estimate in old ages and require more information to provide best estimates.
اظهر المزيد [+] اقل [-]ADIÇÃO DE JITIRANA AO SOLO NO DESEMPENHO DE RÚCULA CV. FOLHA LARGA
2008
Paulo César Ferreira Linhares | Grace Kelly Leite de Lima | José Antônio da Silva Madalena | Patrício Borges Maracajá | Patrícia Liany de Oliveira Fernandes
An experiment was carried out at a greenhouse of Plant Science Department of the Universidade Federal Rural do Semi-Árido (UFERSA), Mossoró-RN, in the period of May to June of 2006, with the objective of determing the best treatment with scarlet starglory (Merremia aegyptia L.) incorporated to with soil on rocket performance cv. Folha Larga. A completely randomized desing with six treatments and four replications. The treatment consist of: T1 - 19g pot-1 of scarlet starglory in green base plus; T2 - 28g pot-1 of scarlet starglory in green base plus; T3 - 37g pot-1 of scarlet starglory in green base; T4 - 46g pot-1 of scarlet starglory in green base; T5 - 55g pot-1 of scarlet starglory in green base; T6 - Fertilization with NPK at the recommended dose for the crop and. The rocket cultivar grown was Folha Larga. The evaluated traits were: plant height, number of leaves per pot, shoo fresh and dry mass. All the evaluated traits were significantly affected by the amounts of scarlet starglory incorporated. Height mean value for plant height, shoo fresh, dry mass and number of leaves were obtained in the amount of scarlet starglory incorporated of 19 g pot-1.
اظهر المزيد [+] اقل [-]