Effects Of Non-Starch Polysaccharides Enzyme Added In Diet On Weanling Piglet And Growing Piglet

The experiment was conducted to investigate the application of non-starch polysaccharide enzyme in weaned piglets and growing pigs. Non-starch polysaccharide enzymes of different concentrations were added in the wheat diet and corn diet respectively to study the effects of which on growth performance and nutrient utilization of weaned piglets and growing pig.In experiment1,168healthy and weight-similar Duroc-Landrace-Yorkshire weanling piglets were randomly divided into6groups with4repeats per group and7pigs per repetition. There are6groups, respectively group I fed by corn-based diet, group II fed by wheat-based diet and groupⅢ、Ⅳ、Ⅴ、Ⅵ respectively fed by corn-based diet+0.015%NSP enzyme, corn-based diet+0.030%NSP enzyme, wheat-based diet+0.015%NSP enzyme, and wheat-based diet+0.030%NSP enzyme respectively. The experiment which was carried out for30d showed the results that:compared with group I, there were no significant effects on ADG、ADF、F/G in group Ⅲ and Ⅳ. Compared with group Ⅱ, group VI showed significantly increasing in final weight and ADG but no significant influence on ADFI and F/G, also did no significant influence compared group I; compared with group Ⅱ, group Ⅵ showed significantly increasing in TP and GLO, but significantly decreasing in content of AST, while showing no significantly difference compared with group Ⅰ. Compared with group Ⅱ, the intestinal pH value of the jejunum and total intestines in group V and VI reduced Significantly, but in group Ⅲ and IV the pH value reduced significantly compared with group Ⅰ. The jejunum chyme viscosity in group Ⅵ was significantly lower than in group Ⅱ, and the ileum chime viscosity in group Ⅵ was significantly lower than in group Ⅰ. For duodenum enzyme activity, amylase activity in group Ⅰ was significantly higher than in group Ⅱ (p<0.05), and it increased significantly in group V when NSP enzymes were added in wheat based diet (p<0.05). And protease activity of all experimental groups were higher than that of group Ⅰ and group Ⅱ, but showed no significant difference (p>0.05). For jejunum enzyme activity, amylase activity was not significantly different among groups, but protease and lipase activities significantly increased after adding NSP enzyme (p<0.01). After adding NSP enzyme, there were significant effects on apparent digestibility of crude fat and energy, but calcium, phosphorus, crude protein had no significant difference. Obviously, no matter adding the NSP enzyme in corn-based diet or wheat-dased diet, both showed positive feeding effects, especially better in the wheat-based diet.In experiment2:240healthy and weight-similar Duroc-Landrace-Yorkshire growing piglets were randomly divided into6groups with4repeats per group and10pigs per repetition. There are6groups, respectively group Ⅰ fed by corn-based diet, group Ⅱ fed by wheat-based diet, groupⅢ,Ⅳ, Ⅴ and VI respectively fed by corn-based diet+0.015%NSP enzyme,corn-based diet+0.030%NSP enzyme, wheat-based diet+0.015%NSP enzyme, and wheat-based diet+0.030%NSP enzyme respectively. The experiment which was carried out for30d show the results that:adding the NSP enzyme no matter in corn-based diets or wheat-based diets showed no significant effects on the growth performance in growing piglets(p>0.05). wheat-based diet increased the activity of ALT of growing pigs, but showed no significant difference (p>0.05).After adding NSP enzyme in wheat-based diet, the activity of ALT decreased, but the difference was not significant (p>0.05). After adding NSP enzyme, the activity of ALP of group Ⅲ and Ⅳ reduced by32.05%(p>0.05) and47.14%(p<0.05) respectively. And group V and VI reduced by16.92%(p>0.05),8.67%(p>0.05) compared with group Ⅱ. Adding NSP enzyme in both type diets increased the utilization of crude fat, but showed no significant difference (p>0.05). The NSP in wheat diet significantly reduced the apparent digestibility of crude protein fodder. After adding NSP enzyme, the apparent digestibility of crude protein had no obvious variation. The corn diet added enzyme was lower than that of positive control group, and0.030%enzyme preparation group reached significant level. While the utilization rate of crude protein of the wheat diet added0.015%group is slightly lower. However, the crude protein digestibility of wheat diet added0.030%enzyme group was higher, but neither reached significant levels (p>0.05).