ResumoObjetivou-se avaliar a estrutura e a produção de forragem em híbridos de capim-elefante manejados sob corte. Utilizaram-se como tratamentos 24 clones de capim-elefante provenientes da Embrapa Gado de Leite e o Cameroom como testemunha. Os capins foram cortados rentes ao solo, a cada 60 dias. Os parâmetros avaliados foram: produção e teor de matéria seca, número de perfilhos basais, número de folhas por perfilho, altura da planta, diâmetro do colmo. A maior altura das plantas foi observada no clone CNPGL 00-103-1. O grupo com maior número de perfilhos teve três clones e média de 39,38 perfilhos m -2 . No grupo dos clones CNPGL 00-103-1, CNPGL 93-25-3, CNPGL 00-16-1 e CNPGL 00-90-3 foram observados os maiores teores de matéria seca (22,7% de MS). As maiores massas de forragem, de lâmina foliar e de colmo foram observadas no clone CNPGL 00-214, 15852 e 6195 kg ha -1 de MS respectivamente. A maior relação lâmina foliar/colmo foi do clone CNPGL 00-201-1 e apenas neste a massa de lâmina foliar foi superior à de colmo. O clone CNPGL 00-214 mostrou-se mais produtivo, com alta capacidade de perfilhamento e de acúmulo de forragem. Palavras-chave: Colmo; lâmina foliar; perfilho; Pennisetum sp. AbstractThe objective of this study was to evaluate the structure and forage production of hybrids of elephantgrass managed under cut. Twenty-four clones of elephant-grass from Embrapa dairy cattle were used as treatments, and Cameroom as a control. The grasses were cut close to the ground, every 60 days. The parameters evaluated were yield and dry matter content, number of basal tillers, number of leaves per tiller, plant height, stem diameter. The highest height of the plants was observed in clone CNPGL 00-103-1. The group with the highest number of tillers had three clones and a mean of 39.38 tiller m -EMERENCIANO NETO, J.V. et al.Cienc. anim. bras., Goiânia, v.20, 1-11, e-46788, 2019 2 . In the group of clones CNPGL 00-103-1, CNPGL 93-25-3, CNPGL 00-16-1 and CNPGL 00-90-3 the highest dry matter contents (22.7% DM) were observed. The highest masses of forage, leaf blade and stem were observed in clone CNPGL 00-214, 15852 and 6195 kg ha -1 DM, respectively. The highest leaf blade / stem ratio was of the CNPGL 00-201-1 clone, and only in this did the leaf blade mass exceed that of the stem. Clone CNPGL 00-214 showed to be more productive, with high tillering capacity and forage accumulation.
<p>The objective of this work was to evaluate the potential of conservation post-harvest starch-based edible film coatings manioc on ‘Tommy Atkins’ mangoes under refrigerated storage. We used fruit from a market in Natal / RN, respecting maturation stage “de vez”. After that the mangoes were taken to the Laboratory of Soils and Plants of the Agricultural School of Jundiaí - EAJ, where they were selected, aiming at the standardization of color, size and weight. The experimental design was completely randomized, in a factorial scheme of 5 x 6 type, corresponding to different treatments of the fruit (without coating application; edible film spraying based on cassava starch; fruit spraying with edible film based on manioc starch + calcium chloride, fruit spraying with edible film based on manioc starch + calcium propionate, fruit spraying with manioc starch + potassium permanganate) in six periods (0, 5, 10, 15, 20, 25 days) in a refrigerated environment (12 ± 2, 85% RH ± 5), and four replicates. The results were submitted to analysis of variance, the means of comparison was done by the Tukey test (5% probability). It was verified that the treatments used were superior to the control from the 15th day of storage, to loss of mass, prolonging the shelf life of the fruit in 10 days, but with no effect for the associations with source of calcium and oxidizing agent.</p>
O objetivo deste experimento foi avaliar a herdabilidade no sentido amplo de híbridos de capim-elefante (Pennisetum sp.) provenientes de cruzamentos intra e interespecíficos. Foram avaliados 38 clones de capim-elefante durante três cortes realizados a cada 60 dias. Foram estudadas o número de folhas por perfilho (NFP); altura da planta (AP); diâmetro do colmo (DC); teor de matéria seca (TMS); produção de matéria seca (PMS) e número de perfilho (NP). Estimou-se a herdabilidade no sentido amplo, a variância e coeficientes de variação fenotípica, genética e ambiental. Não houve diferença significativa entre os clones apenas para o DC no 1º e 2º cortes e o TMS no 1º corte. As estimativas de herdabilidade encontradas foram consideradas de alta magnitude, com média entre cortes de 78,20% para NFP, 82,01% para AP, 77,45% para DC, 75,95% para TMS, 78,48% para PMS e 73,53% para NP. As estimativas dos coeficientes de variação foram de baixa magnitude, variando de 6,73 a 35,72%, nos cortes estudados, indicando menor interferência do ambiente. A variância genotípica foi maior que a ambiental para todas as características em todos os cortes. As características estudadas são critérios adequados a seleção de materiais superiores do capim elefante
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