Abstract: Sixty growing pigs (Landrace×Jia) were used to study the effects of adding exogenous enzymes (including β glucanase, xylanase and cellulase) to paddy based diets on growth performance and digestion in growing finishing pigs. Results showed that with the supplementation of enzymes, average daily gain of pig was increased by 8.78%(P<0.05) and feed gain ratio was decreased by 9.42%(P<0.05); feed apparent digestibilities of crude protein, extrude ether, and crude fiber were increased by 12.73% (P<0.01), 8.84%(P<0.05), and 16.97%(P<0.01), respectively; the viscosity of jejunum,ileum contents were reduced by 7.08%(P<0.01), and 6.78%(P<0.01), respectively; numbers of E. coli in feaces and diarrhoea morbidity were decreased by 81.29%(P<0.01), and 37.00%(P<0.05) respectively; the activities of protelytic enzyme and α amylase in duodenal contents were increased by 99.07% (P<0.05), and 18.38%(P<0.05), respectively.

Key words: marker assisted selection, hybrid rice, bacterial blight, disease resistance

摘要： 选择60头体重约35 kg的“长加”二元杂交猪，按饲养试验要求分成2组，分别饲喂不含和含0.2%复合酶制剂（内含β-葡聚糖酶、木聚糖酶和纤维素酶）的早籼稻型饲粮，进行了为期70 d的饲养试验，在试验后期进行了消化试验、采样分析。饲养试验结果显示，添加复合酶制剂使日增重提高了8.78%(P<0.05）,料重比降低了9.42%(P<0.05）；消化试验表明，饲粮中添加复合酶制剂使饲料粗蛋白、粗脂肪和粗纤维的表观消化率分别提高了12.73个百分点(P<0.01）、8.84个百分点(P<0.05）和16.97个百分点(P<0.01）。添加复合酶制剂使空肠、回肠内容物粘度分别降低了7.08%(P<0.01）、678%(P<0.01)，粪中大肠杆菌数、腹泻频率分别较对照组降低了81.29%(P<0.01）、37.00%(P<0.05）。消化性能指标分析显示，添加复合酶制剂组十二指肠内容物总蛋白水解酶、α-淀粉酶活性较对照组提高了99.07%(P<0.01）和18.38%(P<0.05）。

关键词: 猪, 稻谷, β葡聚糖酶, 木聚糖酶, 纤维素酶, 生长, 消化