不同无机磷水平日粮添加植酸酶对保育猪生长性能、血清生化指标及养分表观消化率的影响

doi:10.11843/j.issn.0366-6964.2015.10.024

摘要/Abstract

摘要：

本试验旨在研究不同无机磷水平日粮添加植酸酶对保育猪生长性能、血清生化指标及养分表观消化率的影响。选择(40±2)日龄保育猪224头，随机分为7个处理，每个处理4个重复，每个重复8头猪。处理Ⅰ为对照组，饲喂基础日粮（参照NRC（1998）配制，通过加入磷酸氢钙满足磷需要量），处理Ⅱ、Ⅲ、Ⅳ、Ⅴ、Ⅵ组磷酸氢钙水平分别为对照组的100%，75%、50%、25%、0%，并添加750 FTU•kg^-1的植酸酶，处理Ⅶ为阴性对照组，不添加磷酸氢钙和植酸酶，预试期7 d，试验期35 d。试验结果表明，100%、75%、50%磷酸氢钙加酶组的平均日采食量、平均日增重和料重比均与对照组无显著差异（P>0.05），无磷酸氢钙组添加植酸酶可以显著改善料重比（P<0.05）。随日粮无机磷水平的降低，加酶组的平均日增重、平均日采食量及血清磷浓度呈线性和二次曲线降低（P<0.01），血清碱性磷酸酶（ALP）活性及钙、磷、粗蛋白、干物质的表观消化率呈线性和二次曲线升高（P<0.01）。无磷酸氢钙加酶组钙和磷的表观消化率显著高于阴性对照组（P<0.05）。综上所述，本试验条件下，在日粮中添加植酸酶降低无机磷添加量能提高保育猪对日粮中养分的表观消化率，改善生长性能；并且，植酸酶在低磷日粮中的效果更为明显。综合各项指标，在保育猪日粮中添加750 FTU•kg^-1的植酸酶可以降低25%～50%的磷酸氢钙添加量。

Abstract:

The study aimed to study the effect of phytase supplementation in nursery pigs fed diets with different levels of inorganic phosphorus(P) on the growth performance，serum biochemical parameters and apparent digestibility of nutrients.A total of 224(40±2)-day-old nursery pigs were divided into 7 treatment(TRT) with 4 replicates per group and 8 piglets in each replicate.Pigs in the TRT Ⅰ(control group) were fed a basal diet prepared according to the NRC(1998)，adding dicalcium phosphate to meet phosphorus requirement.TRT Ⅱ，Ⅲ，Ⅳ，Ⅴ，Ⅵ，750 FTU•kg^-1 of phytase added，were supplemented with 100%，75%，50%，25%，0% of dicalcium phosphate in control group，respectively.No dicalcium phosphate and phytase were added in TRT Ⅶ(negative control group).Periods of pre-trial and trial were 7 and 35 d，respectively.The results showed that the average daily feed intake(ADFI)，average daily gain(ADG) and the feed conversion ratio(F/G) of the groups of 100%，75%，50% dicalcium phosphate added phytase were not significantly different with the control group(P>0.05).The group without dicalcium phosphate added phytase could significantly improve the F/G(P<0.05).With the reduction of dietary inorganic P levels，ADFI，ADG and the serum P concentration of the phytase groups decreased with linear and quadratic effects(P<0.01)，meanwhile the serum alkaline phosphatase(ALP) activities，apparent digestibility of calcium(Ca)，P，crude protein(CP) and dry matter(DM) of the groups added phytase increased with linear and quadratic effects (P<0.01).The apparent digestibility of Ca and P of the groups without dicalcium phosphate added phytase were significantly higher than that of negative control group(P<0.05).In summary，under the experimental conditions，the phytase addition in the diet reducing the amount of inorganic Pimproved the digestibility of nutrients and production performance of nursery pigs，and effect of phytase was more significant in diet with lower inorganic P level.It is suggested that adding phytase at 750 FTU•kg^-1 might reduce 25%-50% of dicalcium phosphate supplementation in the diets of nursery pigs.

中图分类号:

S828
S815

王志恒，杨维仁，郭宝林，王德海，刘晓明，张崇玉，赵丽芳. 不同无机磷水平日粮添加植酸酶对保育猪生长性能、血清生化指标及养分表观消化率的影响[J]. 畜牧兽医学报, 2015, 46(10): 1891-1898.

WANG Zhi-heng，YANG Wei-ren，GUO Bao-lin，WANG De-hai，LIU Xiao-ming，ZHANG Chong-yu，ZHAO Li-fang. Effects of Phytase Supplementation on Growth Performance，Serum Biochemical Parameters and Apparent Digestibility of Nutrients in Nursery Pigs Fed Diets with Different Levels of Inorganic Phosphorus[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2015, 46(10): 1891-1898.

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