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Effect of twice pelleting feed on the digestive organ of weaning piglets

Cheng Zhibin,Su Zifeng,Zhang Hongbing,Yang Jianfa,Liao Guozhou, Liao Qishun,Wang Guiying,Wei Yun  
The objective of this experiment was to study the effect of twice pelleting feed on the digestive organ of weaning piglets.Three hundred and sixty piglets at weaning age of 21 days,according to the pelleting processing and feedstuffs pretreatment of weaning feed,were designed to four treatment groups.The diet of Group 1 was used of corn and soybean meal by once pelleting,Group 2 was used of expanded corn and soybean meal by once pelleting,Group 3 was used of corn and soybean meal by twice pelleting,and Group 4 was used of expanded corn and soybean meal by twice pelleting.The relative value of the small intestinal weight to the final living body weight for Group 4 piglets was higher than those of Group 1 and 3(P0.05),and the ratios of the small intestinal length and jejunum mucous weight to the final living body weight for Group 4 were the highest among all treatment groups.The jejunum villus height for Group 4 was higher than those of other three groups.For the index of jejunum wall thickness,Group 4 piglets were higher than Group 1,and Group 2 and 3 piglets had no significant differences(P 0.05).These findings proved that the weaning piglets completed feed processed by twice pelleting and the use of expanded corn and soybean meals,could improve the growth performance by enhancing the development of small intestine.
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