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This study aimed to evaluate the nutritive value of hay from ten sorghum-sudangrass hybrids. A randomized block design with ten treatments and three replicates was used. The chemical composition was analyzed 57 days after germination. Hay from hybrids BRS 810 and BRS 802 showed similar dry matter content, although it was lower compared to other genotypes (86.98; 86.47%). Ash content was highest for the hybrid BRS 810 (6.46%). The highest crude protein content was found in hybrids BRS 810, 1013020, and BRS 802 (14.01; 12.84 and 11.96%, respectively). The lowest neutral detergent fiber (NDF) concentrations were observed in hybrids 1134029 and BRS 810, ranging from 57.72 to 58.57%. The acid detergent fiber (ADF) concentration was least in hybrids BRS 810 and 1013029 (30.30 and 30.31%). The highest lignin content was found in hybrids 1013020 and 1134023 (5.82 and 5.41%, respectively). Values of dry matter digestibility were higher than 50%. Hay from all hybrids was of good quality, but hybrids 1013020, BRS 810, BRS 802 were better in terms of nutritive value. Keyword: Cutting and grazing, Digestibility, Fodder, Genotype, Haymaking. RESUMO Este estudo teve como objetivo avaliar as características nutricionais do feno de dez híbridos de sorgo com capim-Sudão. O delineamento utilizado foi em blocos ao acaso, composto por 10 tratamentos com 3 repetições. As características nutricionais dos respectivos fenos foram analisadas 57 dias após a germinação. Os híbridos BRS 810 e BRS 802 apresentaram teores semelhantes de matéria seca e inferiores aos demais fenos (86,98; 86,47). Para a variável matéria mineral o maior valor obtido foi de 6,46% para o híbrido BRS 810. Quanto a proteína bruta os maiores teores foram apresentados pelos genótipos BRS 810, 1013020, BRS 802 (14,01; 12,84 e 11,96%, respectivamente). Os menores valores de fibra insolúvel em detergente neutro (FDN) variaram de 57,72 a 58,57% para os genótipos 1134029 e BRS 810. Para a fibra insolúvel em detergente ácido (FDA) os menores valores foram dos híbridos BRS 810 e 1013029 de 30,30 e 30,31%. Em relação a lignina os maiores valores encontrados foram para os genótipos 1013020 e 1134023 (5,82 e 5,41%, respectivamente). Os valores de digestibilidade da matéria seca foram superiores a 50%. Os híbridos avaliados demonstraram fenos de boa qualidade, no entanto os híbridos, 1013020, BRS 810, BRS 802 apresentaram melhor valor nutricional. Palavras-chave: Corte e pastejo, Forragem, Genótipo, Fenação, Digestibilidade. Brazilian Journal of Development Braz. J. of Develop., Curitiba, v. 6, n. 9, p. 64816-64826, sep. 2020. ISSN 2525-8761 64818

brazilian journal of development

NUTRITIVE VALUE OF HAY FROM SORGHUM-SUDANGRASS HYBRIDS (SORGHUM SUDANENSE VS. SORGHUM BICOLOR) / VALOR NUTRITIVO DO FENO DE HÍBRIDOS DE SORGO COM CAPIM-SUDÃO (SORGHUM SUDANENSE VS. SORGHUM BICOLOR)