酶解豆粕对肉鸡生产性能和养分消化率的影响

本试验旨在研究微生物蛋白酶水解豆粕对1～21日龄肉鸡生长性能和养分消化率的影响。选择1日龄科宝母雏336只，随机分为4组，即对照组、试验Ⅰ、Ⅱ和Ⅲ组。对照组为玉米—豆粕型基础日粮，试验Ⅰ、Ⅱ和Ⅲ组分别以5%、10%和15%酶解豆粕替代对照组中等量的普通豆粕。试验结果表明，与对照组相比，试验组显著提高了肉鸡采食量（12%～21%）和增重（8%～16%）(P<0.05)，降低料重比（3%～7%）(P<0.05)；试验组对干物质、粗蛋白质、能量、钙和磷的消化率也具有显著的提高作用(P<0.05)；各试验组之间，生产性能和干物质、粗蛋白质、钙消化率差异显著(P<0.05)，但能量和磷的消化率差异不显著(P>0.05)。因此，豆粕经酶解改善了其蛋白质的营养价值，肉仔鸡日粮添加酶解豆粕可以提高肉鸡的生长性能和养分消化率。

Effect of Microbial Protease Hydrolyzed Soybean Meal on the Growth Performance and Nutrient Digestibility of Broilers

The objective of this study was to investigate the effect of microbial protease hydrolyzed soybean meal on the growth performance and nutrient digestibility of 1 to 21-day-old broilers. A total of 336 female Cobb broilers were allocated into 4 treatments, including control group, experimental Ⅰ,Ⅱand Ⅲ group. Control diet was based on corn-soybean meal, and microbial protease hydrolyzed soybean meal was used to replace common soybean meal at 5%,10%,15% in experimentalⅠ,Ⅱand Ⅲ group, respectively. Results showed that experimental groups increased feed intake by 12% to 21% and body weight gain by 8% to 16% (P<0.05), and decreased ratios of feed to gain by 3% to 7% (P<0.05); and also improved the digestibility of dry matter, crude protein, energy, calcium and phosphorus of broilers (P<0.05), compared to the control group. There were significant differences among experimental groups in growth performance and the digestibility of dry matter, crude protein and calcium (P<0.05), but not for energy and phosphorus digestibility (P>0.05). The results suggested that soybean meal treated with microbial protease can improve the nutritional value of soybean protein and the growth performance and nutrient digestibility of broilers.