动物营养学报Issue(3)：893-901,9.DOI:10.3969/j.issn.1006-267x.2015.03.029
不同磷水平和钙磷比饲粮添加植酸酶对妊娠母猪养分表观消化率的影响
Effects of Different Phosphorus Levels and Calcium to Phosphorus Ratios with Phytase Supplementation on Dietary Nutrients Apparently Digestibility in Pregnant Sows
摘要
Abstract
The objective of this study was to estimate the effects of different levels of phosphorus ( P) and cal-cium ( Ca) to P ratios with phytase supplementation on nutrients digestibility of sows during pregnancy. Thirty-six healthy and pregnant (2 to 3 fetals, 28 days prior to farrowing) sows (Landrace×Yorkshire) on the same genetic background with similar body weight (221.91±7.41) kg and close parturition date were randomly di-vided into 9 groups with 4 replicates per group. Sows in the control group were fed a basal diet; those in the group 2 were fed the basal diet supplemented with phytase, those in the groups 3 to 5 were fed diets with the same Ca level (7.26 g/kg) and phytase supplemented, and inorganic P additions were 75%, 50%, 25% (Ca to P ratio was from 1.35 to 1.63 to 1.00) of the control group, respectively; those in groups 6 to 9 were fed diets with Ca to P ratio maintained 1.25∶1.00 and phytase supplemented, and inorganic P additions were 75%, 50%, 25% and 0 of the control group, respectively. The results showed as follows: 1 ) in normal P level (5.81 g/kg) groups, supplementation of phytase significantly improved the apparent digestibility ( AD) of feed dry matter (DM), ash, organic matter (OM) and P (P<0.01), reduced the fecal excretion of P (P<0.01), and tended to decrease copper and zinc excretion (P<0.10). Dietary supplementation of phytase in lower P level than control group significantly improved the AD of feed DM, ash, OM, P, Ca, iron, copper, and zinc ( P<0.01) , and reduced the fecal excretion of P, Ca, iron, copper, and zinc ( P<0.05) . 2) Dietary reduction of P level resulted in a linear or quadratic increase in the AD of DM, ash, OM, P, iron, copper, zinc ( P<0.05) , and a linear or quadratic reduction in fecal excretion of P, iron, copper and zinc under the condition of unchanged Ca level or Ca to P ratio ( P<0.05) . AD of Ca and crude protein were significantly in-creased by reducing P level when Ca to TP ratio controlled as 1.25∶1.00 (P<0.05). 3) Addition of phytase could replace 0.91 and 1.27 g/kg of inorganic P and reduced fecal P excretion by 24.70% and 34.48% respec-tively when Ca level was maintained 7.26 g/kg and Ca to P ratio was maintained 1.25∶1.00 based on the appar-ent digestible P. 4) Groups with Ca to P ratio controlled 1. 25∶1. 00 had significantly higher nutrient AD and lower excretion of fecal mineral than groups with Ca level maintained 7.26 g/kg ( P<0.01) . In summary, the lower the Ca to P ratio (1.25∶1.00) and lower inorganic P level, the higher the effect of phytase on nutrient AD in the present study. Supplementation of phytase in diet with Ca to TP ratio maintained 1.25∶1.00 can re-place 1.27 g/kg inorganic P based on digestible P.关键词
植酸酶/无机磷/钙/母猪/养分表观消化率Key words
phytase/inorganic P/Ca/sows/apparent nutrient digestibility分类
农业科技引用本文复制引用
郭文文,杨维仁,郭宝林,张亮,魏茂莲,王德海,赵丽芳..不同磷水平和钙磷比饲粮添加植酸酶对妊娠母猪养分表观消化率的影响[J].动物营养学报,2015,(3):893-901,9.基金项目
山东省现代农业产业技术体系生猪创新团队建设项目( SDAIT-06-022-05) （ SDAIT-06-022-05）
