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Efeito da taxa de lotação e da utilização de nitrogênio ou de leguminosas na composição de pastagens de capim-colonião

Authors: Paulo Antonio Godoi; Vanildo Favoretto; Jane Maria Bertocco Ezequiel; Paulo de Figueiredo Vieira;

Efeito da taxa de lotação e da utilização de nitrogênio ou de leguminosas na composição de pastagens de capim-colonião

Abstract

O presente trabalho, conduzido em área experimental da Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal €” UNESP, teve por objetivo verificar o efeito da fertilização nitrogenada (100kg de N/hectare/ano) ou da consociação leguminosas-soja perene (Neonotonia wightii Willd.) e centrosema (Centrosema pubescens Benth.) e da utilização de duas taxas de lotação (1,5 e 2.0 animais/hectare) na variação da composição botânica e bromatológica de pastagens de capim-colonião (Panicum maximum Jacqi. Foram utilizados bovinos mestiços com idade de nove-doze meses e peso vivo médio de 200-250kg. Através de amostragens do material vegetativo das pastagens. realizadas a cada 56 dias, verificou-se que a disponibilidade de matéria seca do capim-colonião, adubado com nitrogênio, foi sempre mais elevada quando comparada com o capim-colonião testemunha ou com a consociação. Todavia, principalmente no período seco, esse aumento na produtividade pela aplicação do nitrogênio não resultou em material de boa qualidade, com baixos teores de proteína bruta (2,74%) e elevados teores dos constituintes da parede celular (81,75%). Esse fato ocorreu mesmo na taxa de lotação máxima adotada, pois o número de animais foi insuficiente para consumir o excesso de vegetação produzida, O uso da carga animal mais elevada possibilitou um aumento na proporção de leguminosas nas pastagens consorciadas, sendo que a presença das mesmas influiu no aumento da fração protéica da gramínea.

Keywords

SF1-1100, Animal culture

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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