河南农业科学Issue(8)：128-132,5.DOI:10.15933/j.cnki.1004-3268.2015.08.028
复合酸对老龄蛋鸡日粮pH值和消化道内环境的影响
Effects of Compound Acid on Dietary pH and Gastrointestinal Environments in Older Laying Hens
摘要
Abstract
The effects of compound acid on dietary pH and gastrointestinal environments in old laying hens were studied by feeding trials with compound acid. 864 Hy-line gray breeding layers of 43 weeks were randomly divided into groupⅠ(basal diet),groupⅡ(basal diet+0. 2% citric acid)and group Ⅲ(basal diet+0. 2% compound acid). The pH and acid binding force of diet were determined before feed-ing. Gastrointestinal pH and the activity of digestive enzyme in small intestine and the flora in cecum from test chickens were determined at the first weekend(T1) and the fifth weekend(T2) during test. The re-sults indicated that the dietary pH and acid binding force in groupⅡand Ⅲ were significantly reduced ( P<0 . 05 ) than groupⅠ. The pH of craw and gland stomach from chickens in groupⅢwere very signifi-cantly reduced during T1(P<0. 01) and significantly reduced during T2(P<0. 05) than groupⅡ,and the pH of muscular stomach from chickens in group Ⅲ decreased by 9 . 72%( P <0 . 01 ) and 4 . 06%( P<0 . 05 ) during T1 and reduced 8 . 25%( P<0 . 05 ) and 0 . 37%( P>0 . 05 ) during T2 than groupⅠandⅡ,respectively. The activity of amylase in small intestine of chichens in groupⅡandⅢincreased by 10 . 16%( P<0 . 05 ) and 16 . 61%( P <0 . 05 ) during T1 and increased by 10 . 22%( P <0 . 05 ) and 18 . 41%( P<0 . 05 ) during T2 than groupⅠ. The number of lactobacillus in the cecum of chickens in groupⅡandⅢincreased by 7. 21%(P<0. 05) and 8. 24%(P<0. 05) than groupⅠduring T2,and the number of E. coli in the cecum of chichens in groupⅡand Ⅲ decreased by 7. 92%( P <0. 05 ) and 15. 45%(P < 0. 01) than groupⅠduring T2, respectively. The results showed that acidulant could obviousely reduce the pH and acid binding force of diet and improve gastrointestinal environments in old laying hens,and the effect of compound acid was superior to the citric acid.关键词
复合酸/老龄蛋鸡/日粮pH值/消化道内环境Key words
compound acid/older laying hens/dietary pH/digestive tract environment分类
农业科技引用本文复制引用
李连缺,孟志敏,米同国,黄占欣,翟新国..复合酸对老龄蛋鸡日粮pH值和消化道内环境的影响[J].河南农业科学,2015,(8):128-132,5.基金项目
邯郸市科技局支撑项目(1122101038-4) （1122101038-4）
