Massas de lâminas foliares nas características produtivas e qualitativas da pastagem de capim-elefante "Pennisetum purpureum, Schum" (cv. "Taiwan") e desempenho animal Mass of leaf lamina in the produtive and qualitative characteristics of Elephantgrass "Pennisetum purpureum, Schum" (cv. Taiwan) pasture and animal performance

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ID: 279321
2006
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Abstract
O experimento foi conduzido no Departamento de Zootecnia da Universidade Federal de Santa Maria, para avaliar produtiva e qualitativamente a pastagem de capim elefante e o desempenho animal sob pastejo. A área experimental foi composta de oito piquetes de 0,443ha cada de capim-elefante (Pennisetun purpureum, Schum. cv. "Tawian"), onde pastejaram 36 novilhos das raças Charolês, Nelore e suas cruzas, com três animais "testers" por piquete, em duas repetições. Foram estudadas as variáveis relacionadas à produtividade e à qualidade da pastagem e ao desempenho animal. As massas reais de lâminas foliares (MLF) de capim-elefante foram: 1.167; 1.543; 1.926 e 2.248kg MS LF/ha, o que constitui os tratamentos. A carga animal suportada pela pastagem, pode ser descrita pela equação y=2.243,14 - 0,32MLF (R2=0,4). O peso vivo final em kg apresentou resposta quadrática (PF=103,41 + 0,114x - 0,00003x², R2=0,5) com o acréscimo da MLF. O ganho de peso diário médio apresentou comportamento linear positivo (GMD = 0,25 + 0,0002MLF, R2=0,2). O aumento na massa de lâminas foliares de capim-elefante acarreta diminuição na carga animal suportada pela pastagem e aumenta o ganho de peso médio diário.
The experiment was conducted at the animal science department of Universidade Federal de Santa Maria, to evaluate productive and qualitative characteristics of elephantgrass pasture and animal performance under grazing. The experimental area consisted of eight paddocks of 0.443 ha of elephantgrass (Pennisetun purpureum, Schum. cv. Taiwam), where 36 Charolais, Nelore and crossbred were kept, with three tester animals per paddock, with two repetitions. Variables related to pasture production and quality and animal performance were studied. Real leaf lamina masses (LLM) of elephantgrass were: 1.167; 1.543; 1.926 and 2.248kg of dry matter of leaf lamina/ha, constituting the treatments. Stocking rate (y=2.243.14 - .32LLM, R2=.4), showed a negative linear relationship. The final liveweight is kg, presented a quadratic effect (y = 103,41 + .114LLM - .00003LLm², R2=.5) with the LLM increase. The average daily weight gain showed positive linear effect (y = .25 + .0002LLM, R2=.2). The increase of the elephantgrass leaf lamina mass proportioned a decrease of stocking rate supported by the pasture and increased the average weight gain.
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Authors Míssio, Regis Luis;Brondani, Ivan Luiz;Menezes, Luís Fernando Glasenapp de;Arboitte, Miguelangelo Ziegler;Filho, Dari Celestino Alves;Restle, João;Leite, Daniel Terra;Pizzuti, Luiz Ângelo Damian;
Journal ciência rural
Year 2006
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