摘要
Abstract
The study was conducted to investigate the effects of different compound enzyme preparations on performance, digestive enzyme activities and serum biochemical indices in cherry valley ducks fed miscellaneous meal diets. Tow hundred and sixty-four healthy cherry valley ducks of 1-day-old were randomly divided into 3 treatments with 4 replicates in each treatment and twenty-two ducks in each replicate. Ducks in group l were fed basal diet containing corn and various protein meals, while those in group 2 were fed basal diet supplemented with enzymes 1 (compound of dextranase, mannose and glucanase) at 100 mg/kg, and those in group 2 were fed basal diet supplemented with enzymes 2 (compound of dextranase, mannose, glucanase and cellulose) at 100 mg/kg. Experimental periods consisted of prophase ( 1 to 14 d ) and anaphase ( 15 to 42 d). The results showed as follows: 1 ) ratio of feed to gain in prophase was group 3 ＜ group 2 ＜ group 1 ( P ＜ 0.01 ); 2 ) compared with group 1, amylopsin activity of group 2 was significantly decreased at 14 d ( P ＜ 0.05 ) , and amylopsin activity in group 2 and 3 was significantly increased at 42 d ( P ＜ 0.01 ), while trypsinase activity was significantly decreased at 42 d( P ＜ 0.01 ); 3 ) serum T3 content in group 3 was significantly higher than that in group 1 and 2 ( P ＜ 0.05 ), T4 content in group 2 was significantly lower than that in group 1 and 3 ( P ＜ 0.01 ), and growth hormone content in group 2 and 3 was significantly lower than that in group 1 ( P ＜ 0.05 ); serum glutamic pyruvic transaminase activity in group 2 ( P ＜ 0.05 ) and 3 ( P ＜ 0.01 ) was significantly higher than that in group 1, and glutamic pyruvic transaminase in group 3 was significantly higher than that in group 2 ( P ＜ 0.01 ); compared with group 1 and 2, serum T4 content in group 3 was significantly increased (P ＜ 0.01 ), while serum glucose content was significantly decreased at 42 d (P ＜ 0.05 ); compared with group 1, uric acid content in serum in group 3 was significantly decreased at 42 d ( P ＜ 0.05). The results suggest that the compound enzyme preparations can effectively improve the performance and affect the digestive enzyme activities and serum biochemical indices in ducks fed miscellaneous meal diets. Enzyme 2 is more effective than enzyme 1. [ Chinese Journal of Animal Nutrition ,2011,23 (2) :285-292]关键词
樱桃谷肉鸭/杂粕型饲粮/复合酶制剂/生产性能/消化酶活性/血清生化指标Key words
cherry valley ducks/ miscellaneous meal diets/ compound enzyme preparations/ performance/ digestive enzyme activities/ serum biochemical indices分类
农业科技
