Effect Of Wheat Based Diet On Growth Performance Of Growing Pigs

The research uses protease parenzyme in vitro digestion method to test the crude protein digestibility in vitro of wheat, corn and soybean when they are on the different crushing degree so that we can analyze the viability that the wheat could replace the corn, and investigate the effects of wheat based diet on growth performance of growing pig in combination with the practice.The results of the research are as follows by grinding wheat, corn and soybean by the sieve of 1.5mm?2.0mm?2.5mm?3.0mm respectively and choosing three samples respectively to test the digestibility of stomach protease and the total digestibility of stomach protease and parenzyme. The result is as following:When wheat, corn and soybean meal are the same crushing degree, the crude protease digestion rate and pepsin digestibility are always:soybean meal>wheat>corn, there is no significant difference between soybean meal and wheat; significant difference was found in corn and soybean meal and wheat. Wheat, corn and soybean meal three kinds of raw materials of gastric protein digestibility in vitro and stomach trypsin digestion rate always negative correlation with crushing degree, crushing grain size is smaller, the digestion rate is higher.In addition, choosing 150 pigs with good health, the similar age and the average weight of 30kg and randomly grouping them into two pairs with five repetitions,each of which are 15 pigs. The grouped two pairs are fed with wheat based diet and corn-soybean based diet respectively within 36 days. The result is as following:the performance of the two pairs in the daily weight increasing, feed intake, the feed conversion rate, diarrhe rate is almost the same (P>0.05). Besides, the incarnadine has no difference.However, the cost of the pig with wheat based diet is lower, which is reduced by 5.01%(P<0.05).