Digestion of feed fractions and intake of heifers fed hydrolyzed sugarcane stored for different periods

Revista Brasileira de Zootecnia

Regis Luis Missio²  Mauro Dal Secco De Oliveira²  Mariana Paula Rossi Sforcini²  Francisco Palma Rennó¹  José Esler Freitas Júnior¹  Denise Adelaide Gomes Elejade¹  Viviane Borba Ferrari²  Guilherme De Carvalho Abud² 

[1] ,UNESPJaboticabal

关键词: digestibility;    dry matter intake;    hydrated lime;    microbial protein;    Nellore;    nitrogen balance;   

DOI  :  10.1590/S1516-35982012000700025

来源: SciELO

【 摘 要 】

The objective of this study was to evaluate, in Nellore heifers, intake and digestibility of hydrolyzed sugarcane stored for different periods. The experimental design used was a 4 × 4 Latin square, four diets, four Nellore heifers with ruminal cannulas (initial body weight 285.4±23.08 kg and average initial age 14 months) and four periods of 21 days. The diets were composed by fresh sugarcane (time zero) or hydrolyzed sugarcane with addition of 0.5% of hydrated lime, stored for 24, 48 or 72 hours, as the unique forage. Intake and digestibility of feed fractions, nitrogen balance, microbial synthesis efficiency, total number of ruminal protozoans and ammoniacal nitrogen did not significantly change by storing sugarcane with addition of 0.5% of hydrated lime. Sugarcane pH varied quadratically for storage time, with maximum pH of 7.02 after 24 hours from lime addition. Ruminal liquid pH values were higher for heifers fed fresh sugarcane, in comparison with those fed hydrolyzed sugarcane. Sugarcane treated with 0.5% of hydrated lime stored for up to 72 hours does not change ruminal digestion to alter the amount of feed consumed by pubescent Nellore heifers. Thus, lime is a viable technology, once it allows long-duration storage and bee control on treated forage, which contributes to animal feeding logistics.

【 授权许可】

CC BY   
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