【作者】 吴淑云；

【导师】 姚军虎；

【作者基本信息】 西北农林科技大学 ， 动物营养与饲料科学， 2004， 硕士

【摘要】 选用32周龄罗曼褐壳蛋鸡375只，随机等分为5组，每组5重复，设计代谢能、粗蛋白质、钙及主要氨基酸相同而总磷和有效磷不同的五种日粮，研究麸皮水平及植酸酶对蛋鸡生产性能、蛋壳质量、营养物质代谢率及血液指标的影响。日粮处理分别为A（0%麸皮，0.35%有效磷）、B(5%麸皮，0.35%有效磷)、C(10%麸皮，0.35%有效磷)、D(10%麸皮，0.28%有效磷) 及E(10%麸皮+0.02%罗氏植酸酶，植酸酶潜在有效磷与日粮本身有效磷之和为0.28%)。试验结果表明: 1．在日粮有效磷为0.35%时，加入5%或10%麸皮可显著提高产蛋量（P<0.05），显著降低料蛋比（P<0.05），产蛋率、蛋重趋于增加（P>.05）。其中以10%麸皮添加量蛋鸡生产性能较好。 2．日粮麸皮水平为10%时，与C组相比，D组产蛋量显著降低（P<0.05）并趋于降低产蛋率（P>.05），E组与D组相比，各项生产性能指标有改善趋势，但未达到显著水平（P>0.05）。 3．五个处理间日均采食量、粪便含水率无显著差异(P>0.05)。蛋壳厚度及软破蛋率不受处理影响（P>0.05）。 4．与A组相比，B组、C组总磷表观代谢率分别提高9.9%（P>0.05）、18.4%（P<0.05），粗蛋白表观代谢率分别提高9.03%、4.56%。C、D组间总磷和粗蛋白表观代谢率差异不显著（P>0.05）。E组总磷表观代谢率极显著高于D组（P<0.01），粗蛋白表观代谢率高于D组（P>.05）。日粮钙、干物质和能量表观代谢率均不受处理影响（P>0.05）。 5．与A组相比，B组、C组血清无机磷含量分别提高5.2%（P>0.05），9.3%（P<0.05）。日粮麸皮水平为10%时，与C组相比，D组血清无机磷含量降低7.9%（P<0.05）。E组与D组相比，血清无机磷含量趋于提高（P>.05）。AKP活性和钙含量不受处理影响（P>0.05）。更多还原

【Abstract】 An 12-week experiment was conducted to study effects of wheat bran levels and phytaseon productive performance, metabolism of main nutrients and serum parameters in layinghens. 375 brown shell Lomman laying hens aged 32wks were distributed randomly to fivegroups with five replicates and fifteen per replicate. Five diet treatments were designed asfollows: treatments A,B and C contained 0.35% available phosphorus(AP) and 0% ,5% and10% the wheat bran level was, respectively, treatment D contained 10% wheat bran and0.28%AP, and treatment E with 10%wheat bran and 500IU/kg microbial phytase whichsubstituted 0.12% AP,he total AP level of diet was 0.28%. All diets contained the equal levelof apparent metabolic energy, protein, calcium and main essential amino acids. Experimentresults showed that: 1. The egg mass and ratio of egg weight to feed intake were significantly greater for henssupplemented with 5% and 10% wheat bran than for hens fed no wheat bran diet at0.35%AP(P<0.05).As the wheat bran adding level increased, the egg production and eggweight intended to increase(P>0.05). Hens fed the diet contained 10% wheat bran had the bestproductive performance . 2.Egg mass of treatment D was significantly lower than that of treatment C, and the eggproduction intended to decrease in treatment D. Compared with treatment D, treatment Eintended to enhance the productive performance. 3.There was no significant differences in feed intake, eggshell quality and fecal moistureamong all the treatments. 4.Compared with treatment A, the apparent metabolic rate of total phosphorus(TP) andcrude protein(CP) in treatment B and C were increased by 9.9%（P>0.05）,18.4%（P<0.05）and 4.56%（P>.05）,9.03%（P<0.05）,respectively. There were no significant difference inthe apparent metabolic rate of TP and CP between treatment C and D. The apparent metabolicrate of TP of treatment E was higher extremely than treatment D（P<0.01）and the apparentmetabolic rate of CP was increased in treatment E（P>0.05）. There was no significantdifference in the apparent metabolic rate of Ca, dry material(DM)and general energy（GE）among all the treatments. 5．Compared with treatment A, the phosphorus( P ) content in serum in treatment B andC were increased by 5.2%（P>0.05）and 9.3%（P<0.05）,respectively. The P content in serum<WP=7>in Treatment D decreased by 7.9%（P<0.05）compared with treatment C. The P content inserum in treatment E was higher than that in treatment C（P>0.05）. There was no significantdifferences in the alkaline phosphatase(AKP) activity and Ca content in serum among all thetreatments.更多还原