体外产气法评价反刍动物饲料营养价值的研究

doi:10.16431/j.cnki.1671-7236.2016.01.012

Abstract

Abstract: The experiment was conducted to evaluate nutrient value of ruminant feeds by in vitro gas production method.The volume of gas production(GP) at 2, 6, 12 and 24 h, in vitro fermentation parameters and nutrient degradation rate of three energy feeds(corn, corn bran and wheat bran) and three roughages(alfalfa meal, alfalfa hay and corn silage) were measured, and gas production kinetic parameters among different feeds and the relationship between fermentation kinetics and nutritent composition were analyzed.The results showed that the GP₂₄, theoretical gas production(A) and B of corn was the highest among energy feeds, but there was no significant differences of B among different energy feeds(P>0.05).The DMD of corn, the NDFD of corn bran and the CPD of wheat bran were the highest;There were no significant differences in GP₂₄ among roughages.The GP₂₄, A, DMD, CPD of alfalfa meal were the highest, while there was no significant differences of B among roughages(P>0.05).Correlation analyses indicated that the theoretical maximum gas production and the accumulative gas production were extremely significant negatively related to CP, NDF, ADF and Ash(P<0.01).Therefore, the experiment revealed that significant differences were observed in in vitro gas producetion kinetic parameters among different feeds, which could supply scientific basis for diet formulation in dairy practice.

Key words: in vitro gas production method; energy feeds; roughages; nutrient value

CLC Number:

S963.3

WANG Fang, XU Yuan-jun, NIU Jun-li, ZHAO Meng, ZHANG Yang-dong, ZHANG Kai-zhan, BU Deng-pan. Nutrient Value Evaluation of Different Type Feeds by in vitro Gas Production Method[J]. , 2016, 43(1): 76-83.

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Nutrient Value Evaluation of Different Type Feeds by in vitro Gas Production Method

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