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Avaliação de Diferentes Híbridos de Sorgo (Sorghum bicolor, L. Moench) quanto aos Componentes da Planta e Silagens Produzidas Evaluation of Different Sorghum Hybrids (Sorghum bicolor, L. Moench) Related to Plant Components and Produced Silages

By Mikael Neumann, João Restle, Dari Celestino Alves Filho, Regis Augusto Carvalho Bernardes, Miguelangelo Ziegler Arboite, Liliane Cerdótes and Luiz Antero de Oliveira Peixoto

Abstract

O experimento foi conduzido com o objetivo de avaliar as características qualitativas dos componentes da planta e da silagem e as características de fermentação da silagem de diferentes híbridos de sorgo forrageiros AGX-213 e AG-2002 e de duplo propósito AGX-217 e AG-2005E. O componente panícula apresentou maiores teores de matéria seca (MS), proteína bruta (PB), matéria mineral (MM) e digestibilidade in vitro da matéria seca (DIVMS) e menores teores dos constituintes da parede celular da planta com relação aos componentes colmo e folhas. Não houve diferenças entre as silagens dos híbridos de sorgo para os teores de MM e DIVMS. A silagem do AG-2005E apresentou maior teor de MS (35,50%), PB (6,69%), extrato etéreo (2,28%) e extrativos não-nitrogenados (58,56%) frente aos demais genótipos. Não houve diferença entre as silagens para os teores de nitrogênio insolúvel na FDA. As silagens de híbridos de sorgo forrageiro (AGX-213 e AG-2002) apresentaram menor pH e teor de N-NH3 (% do N total) em comparação aos híbridos de duplo propósito (AGX-217 e AG-2005E).<br>The experiment was conducted with the purpose to evaluate the qualitative traits of the plant components and fermentation characteristics of silages from different sorghum hybrids AGX-213, AG-2002 (forage) and AGX-217, AG-2005E (double purpose). The panicle component showed higher percentages of dry matter (DM), crude protein (CP), mineral material (MM) and in vitro dry matter digestibility (IVDMD), and lower percentages of plant cell wall than the stems and leaves. No differences were observed among the sorghum silages for MM and IVDMD percentages. The AG-2005E silage showed higher contents of DM (35.5%), CP (6.69%), ether extract (2.28%) and nitrogen-free extract (58.56%) in comparison with the other genotypes. No difference was observed among the sorghum silages for acid detergent insoluble nitrogen (ADIN) content. The silages of the forage hybrids (AGX-213 and AG-2002) showed lower pH and N-NH3 (% of total N) in comparison with the double purpose (AGX-217 and AG-2005E) hybrids

Topics: colmo, folhas, panícula, silagem, sorgo forrageiro, sorgo duplo propósito, double purpose sorghum, forage sorghum, leaves, panicle, silage, stem, Animal culture, SF1-1100, Agriculture, S, DOAJ:Animal Sciences, DOAJ:Agriculture and Food Sciences
Publisher: Sociedade Brasileira de Zootecnia
Year: 2002
DOI identifier: 10.1590/S1516-35982002000200003
OAI identifier: oai:doaj.org/article:8c685fb9426346d8968893af336b7c40
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