【作者】 廖志超；

【导师】 夏中生；

【作者基本信息】 广西大学 ， 动物营养与饲料科学， 2006， 硕士

【摘要】 本试验旨在研究植酸酶替代饲粮中不同比例的磷酸氢钙(DCP)对猪鸡生长性能、血清指标及饲粮养分消化利用率的影响。 试验一：饲养试验选用体重约30kg的杜×长×大三元杂生长猪96头，随机分成4个处理组，每组6个重复，每重复4头，公母比为1：1。A组为对照组，饲喂玉米-豆粕型基础饲粮，B、C、D组的饲粮为分别以250、500、700U／kg的植酸酶取代基础饲粮中的40％、60％、80％的磷酸氢钙。饲养试验为期42d，结果表明：与对照组相比，B、C、D组的平均日增重分别提高了1.05％(P＞0.05)、4.09％(P＜0.05)、2.64％(P＞0.05)；耗料增重比(F／G)分别比对照组降低了2.18％、2.62％、1.75％；每kg增重的饲料成本分别是对照组的97.31％、96.98％和97.81％；血清中钙含量分别提高了4.22％(P＞0.05)、4.22％(P＞0.05)、8.12％(P＜0.05)；血清中磷含量分别提高了1.46％(P＞0.05)、0.36％(P＞0.05)、14.23％(P＜0.05)。 试验二：选用8头20kg左右的杜×长×大三元杂去势公猪，随机分为4组，每组2头，饲粮处理与饲养试验一致，采用全收粪法进行两阶段的消化代谢试验。结果表明：与对照组相比，B、C、D组的蛋白质表观消化率分别提高了3.50％、2.45％、2.32％，组间差异不显著(P＞0.05)；蛋白质生物学价值分别提高了5.75％、6.29％、6.62％，组间差异不显著(P＞0.05)；钙的表观消化率更多还原

【Abstract】 This study was concentrated to investigate the effects of phytase replaced different contents of DCP on the performance, nutrient utilization in corn-soybean meal diets for growing pigs and broilers.Experiment 1. 96 crossbred DurocxLandrace×Yorkshire (DLY) growing pigs about 30kg in body weight (BW) were randomly divided into 4 groups and fed corn-soybean diets. Each group with 6 repeats and each repeat had four pigs. Group A is control, group B, C or D are the test groups. The control diet was supplemented with 1.4% dicalcium phosphate. The test diets were the control diets in which dicalcium phosphate 40%, 60% or 80% was replaced with 250,500 or 700 phytase units per kilogram respectively. The results of 42-day feedy trial showed that comparing with group A , the average daily gain of group B, C or D increased by 1.05% (P>0.05), 4.09 % (P<0.05) or 2.64%(P>0.05) respectively; feed conversion ratio (F:G) decreased by 2.18% (P>0.05), 2.62% (P>0.05) or 1.75% (P>0.05)respectively. Feed Costs for body weight gain in group B, C or D were 97.31%, 96.98% or 97.81% of that for group A respectively; Calcium in serum increased by 4.22%(P>0.05), 4.22%(P>0.05), 8.12%(P<0.05); and更多还原