Effect of dietary supplementation with protease on growth performance,nutrient digestibili

Effect of dietary supplementation with protease on

growth performance,nutrient digestibility, intestinal morphology, digestive enzymes and gene

expression of weaned piglets

Jianjun Zuo;Baoming Ling;Lina Long;Tiejun Li;Ludovic Lahaye;Chengbo Yang;Dingyuan Feng;;;;;;;;;;;;;;;

【期刊名称】《动物营养：英文版》 【年(卷),期】2015(000)004

【摘要】This study was conducted to investigate the effect of dietary protease supplementation on the growth performance, nutrient digestibility, intestinal morphology, digestive enzymes and gene expression in weaned piglets. A total of 300 weaned piglets(21 days of age Duroc x Large White x Landrace; initial BW = 6.27 ± 0.45 kg) were randomly divided into 5 groups. The 5 diets were: 1) positive control diet(PC), 2) negative control diet(NC), and 3) protease supplementations, which were 100, 200, and 300 mg per kg NC diet. Results indicated that final BW, ADG, ADFI, crude protein digestibility, enzyme activities of stomach pepsin, pancreatic amylase and trypsin, plasma total protein, and intestinal villus height were higher for the PC diet and the supplementations of 200 and 300 mg protease per kg NC diet than for the NC diet(P < 0.05). Supplementations of 200 and 300 mg protease per kg NC diet significantly increased the ratio of villus height to crypt