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

Abstract

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.

CLC Number:

S828
S815

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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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

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