In situ degradability of crude protein in whole crop rice silage.

Ishida M., . and Ito G., . and Ando S., . and Hosoda K., . and Matsuyama Y., . and Nishida T., . and Yoshida N., . (2004) In situ degradability of crude protein in whole crop rice silage. [Proceedings Paper]

In situ degradability of crude protein CP in head and straw from four of whole crop rice silage was determined to examine the effect of rate of grain escaped from digestion and composition of head on CP degradability of the silage. Ground samples in the polyester bags were incubated in the rumen of two ruminal fistulated Holstein steers. Disappearance rate of CP p at given incubation time t of each sample were fitted to the exponential model of pabx1-exp-ct to determine faster digestion fraction a slower digestion fraction b and digestion rate c. Degradibility of CP in whole crop rice silage at various rates of grain escaped from digestion and those at various compositions of head were calculated. a fraction of head 34.5 was significantly lower than that of straw 40.8 although b fraction of grain 52.9 and straw 40.6 were not significantly different. The constant rate of c of head 0.151/hr was much higher than that of straw 0.023/hr. It was estimated that the degradability of CP was decreased by 0.4 points when the rates of grain escaped from digestion increased by 1 point and that the degradability was increased by 0.2 points when the composition of head increased by 1 point. These results showed that the rate of grain escaped from digestion and the composition of head affected degradibility of CP in whole crop rice silage.

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Abstract

In situ degradability of crude protein CP in head and straw from four of whole crop rice silage was determined to examine the effect of rate of grain escaped from digestion and composition of head on CP degradability of the silage. Ground samples in the polyester bags were incubated in the rumen of two ruminal fistulated Holstein steers. Disappearance rate of CP p at given incubation time t of each sample were fitted to the exponential model of pabx1-exp-ct to determine faster digestion fraction a slower digestion fraction b and digestion rate c. Degradibility of CP in whole crop rice silage at various rates of grain escaped from digestion and those at various compositions of head were calculated. a fraction of head 34.5 was significantly lower than that of straw 40.8 although b fraction of grain 52.9 and straw 40.6 were not significantly different. The constant rate of c of head 0.151/hr was much higher than that of straw 0.023/hr. It was estimated that the degradability of CP was decreased by 0.4 points when the rates of grain escaped from digestion increased by 1 point and that the degradability was increased by 0.2 points when the composition of head increased by 1 point. These results showed that the rate of grain escaped from digestion and the composition of head affected degradibility of CP in whole crop rice silage.

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Item Type:	Proceedings Paper
Additional Information:	Summary En
AGROVOC Term:	RICE
AGROVOC Term:	ANIMAL FEEDING
AGROVOC Term:	CATTLE
AGROVOC Term:	CRUDE PROTEIN
AGROVOC Term:	FEEDING SYSTEMS
AGROVOC Term:	JAPAN
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:28
URI:	http://webagris.upm.edu.my/id/eprint/16741

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