China Animal Husbandry & Veterinary Medicine ›› 2009, Vol. 36 ›› Issue (6): 10-13.

• 动物营养与饲料科学 • Previous Articles     Next Articles

Effects of Soybean Trypsin Inhibitors on Nitrogen Balance and Apparent Digestibility of Feed Nutrients in Rex Rabbits

ZHANG Jian-yun1， WANG Zhi-xiang2，MA Qiu-gang1，YI Zhong-hua3，GUAN Shu1，JI Cheng1   

  1. (1.College of Animal Science and Technology, China Agricultural University, Beijing 100193, China； 2.College of Animal Husbandry and Veterinary, Henan Agricultural University, Zhengzhou 450002, China； 3.College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China)
  • Received:1900-01-01 Revised:2009-04-16 Online:2009-06-20 Published:2009-06-20
  • Contact: JI Cheng

Abstract: A four-day digestive trial was conducted at the 63±4 days of weaned rex rabbits . Twenty weaned rex rabbits were selected from the five groups with 4 of each group (two males and two females and average body weight 1150.5 g±124.0 g). Five treatments of dietary were provided with isoenergy and isonitrogen of 25% raw soybean(RSB), 25% processed soybean by chemical inactivator, 25% processed soybean by heating, 25% soybean meal and 13% raw soybean + 12% soybean meal respectively. Feces and urine were collected totally and feed intakes were recorded.The results indicated that 25% RSB group has significantly declined apparent nitrogen digestibility (P<0.05) and significantly increased fecal nitrogen content (P<0.05). It had no effect on nitrogen in urine. There was no significant difference among groups of processed soybeans by chemical inactivator and heating and 13% raw soybean in fecal nitrogen, nitrogen digestibility. There is no difference in apparent digestibility of dietary dry matter, organic matter, nitrogen-free extract, ether extract and crude fiber among five groups (P>0.05). 

Key words: soybean; trypsin inhibitors; rex rabbits; nitrogen balance; apparent digestibility

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