不同粗蛋白质水平日粮对育肥羊小肠养分吸收率的影响

doi:10.16431/j.cnki.1671-7236.2016.08.010

Abstract

Abstract:

This experiment was conducted to study the effects of different dietary crude protein levels on the nutrient absorbability in the small intestine of lambs.Three Kazakh lambs (30 kg body weight) fitted with permanent ruminal,duodenal and ileal fistula were selected.3×3 Latin square design was adopted.A dual-phase marker system with LiCr-EDTA and Yb-Ac as the liquid-phase or particulate-phase digesta flows maker was adopted to measure the true digesta flows at duodenal and ileal fistula,respectively.The results showed that nitrogen intake,total tract apparent digestibility,N deposition,the apparent digestibility of dry matter and organic matter were significantly increased with increasing levels of dietary crude protein (P<0.05),but had no significant effects on intestinal digesta flows (P>0.05).Increasing dietary crude protein levels had significant effects on most part of nutrients of duodenal digesta except fat and purine (P<0.05),while it only significantly effected CP,Ash,dry matter,neutral detergent fibre and acid detergent fiber of ileal digesta flows (P<0.05).In addition,intestinal absorbability of nutrients except for CP,Ash,dry matter,neutral detergent fibre and acid detergent fiber were significantly affected with increasing levels of dietary crude protein(P<0.05).The test provided basis for further study of the effects of dietary CP level on the digestibility and utilization of lamb.

Key words: nutrient; flow; intestinal absorbability; Kazakh lambs

CLC Number:

S826

CHEN Ao-dong, YIN Hua, NIU Lu, ZHENG Meng, GAN Mai-lin, LIU Chen-li, CHEN Dao-fu, GAO Wei. Effects of Different Dietary Crude Protein Levels on the Nutrient Absorbability in the Small Intestine of Lambs[J]. , 2016, 43(8): 1998-2004.

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Effects of Different Dietary Crude Protein Levels on the Nutrient Absorbability in the Small Intestine of Lambs

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