Ruminal kinectics of irrigated Tanzaniagrass under three post grazed stubbles intensities

Revista Brasileira de Zootecnia

Balsalobre, Marco Antonio Alvares¹  Santos, Patrícia Menezes²  Penati, Marco Antonio¹  Corsi, Moacyr¹  Demetrio, Clarice Garcia Borges¹ 

[1] USP, Piracicaba;Embrapa Pecuária Sudeste, São Carlos

关键词: CNCPS;    degradability;    DIP;    irrigation;    NDF;    NIRS    Introdução Na busca da sincronização entre a degradação ruminal de carboidratos e proteína;    faz-se necessário determinar as taxas de degradação da matéria seca e das diferentes frações que compõem os carboidratos e as proteínas;   

DOI  :  10.1590/S1516-35982003000700026

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

The objective of this work was to study DM, NDF, CP and IPND ruminal kinectics of irrigated Tanzaniagrass (Panicum maximum Jacq.). Simulated grazed samples were collected on three periods of the year (spring, summer and fall), under three post grazed stubbles intensities (low, medium and high). Three rumen cannulated animals were assigned to a 3 x 3 Latin square design to determine the in situ degradability until 96 hours of incubation. NDF, CP and IPND were determined by NIRS in the residue remaining in the bags. Forage quality was the highest in the summer. The low post grazed stubble treatment showed the highest increase in degradability of all fractions from spring (74.96%) to summer (81.41%). The soluble protein fraction showed values up to 40% of the RDP, which ranged from 62 to 76% CP. NDF C fraction was underestimated by CNCPS. Data of this research suggest that the %lignin/%NDF should be multiplied by a factor from 2.91 to 3.35. CNCPS overestimated the IPND C fraction (12.11 to 17.08%), as compared to the wet lab analysis value, as regarded to be the N-ADF fraction (6.48 to 10.7%). CP and IPND degradability decreased, as the CP and IPND contents increased.

【 授权许可】

CC BY-NC