摘要
研究鲜料中添加植酸酶水平对生长发育期水貂氮、磷利用及生长发育性能的影响。配制Ⅰ~Ⅳ组日粮,Ⅰ组为对照组(基础日粮),Ⅱ~Ⅳ组在基础日粮中分别添加450IU/kg、900IU/kg、4500IU/kg的植酸酶,进行各组日粮干物质、蛋白质、脂肪、钙、磷消化代谢试验和生长发育期饲养试验。结果表明,水貂鲜料添加植酸酶可显著提高干物质、脂肪、粗蛋白、P消化率及N代谢率( P<0.01),N、P环境排放量降低极显著( P<0.01);可显著提高其体增重和平均日增重( P<0.05),其中添加900IU/kg的Ⅳ组生长发育性能最好。
Effects of microbial phytase levels on the availabitility of nutriments and growth performance in Growing Mink were studied .Sixty black male minks were randomly divided into 4 groups ,15 minks per each .The control was fed conventional fresh diet ,the testing groups were applied phytase ,respectively ,phytase 450IU/kg (Ⅱ) ,900IU/kg (Ⅲ) and 4 500IU/kg (Ⅳ) .The results showed that there were significant dif-ference among groups ,the values of DMD、CPD、EED、PD were significant higher than the control ( P〈0.01 or P〈0.05) ,phytase groups were the highest value among groups .The Ca digestibility of Ⅱ 、Ⅲ 、Ⅳ groups were higher than group Ⅰ ,but the difference are not significant ( P〉0.05) .There was clearly trend that phytase could significantly reduce the nitrogen and phosphorus excretion of growing minks ( P〈0.01) ,and increase dietary nitrogen metablic rates in minks ,the 900IU/kg phytase was the best in all groups .There were a significantly increase in the in-dex of body weight gain and average daily gain the groups of phytase than control group ( P〈0.05) .The results showed that it could significant-ly improve the growth performance and availabitility of DM、CP、EE、Ca、P ,applied 900IU/kg of phytase during growing period in mink diets .
出处
《特产研究》
2013年第3期18-22,共5页
Special Wild Economic Animal and Plant Research
基金
国家公益性行业(农业)科研专项(200903014)
吉林省科技发展计划重点项目(20110230)
关键词
植酸酶
水貂
氮
磷利用
生长发育性能
microbial phytase
mink
availabitility of Nitrogen and Phosphous
performance