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The problems of similar dual of subuormal operators are discussed.The symmetry of similar dual of the pure subnormal operator are proved and necessary and sufficient conditions that the similar pure subnonmal operatorha similar minimal normal extention are given and meanwhile the subnormal weighted shift of operators also discussed. 相似文献
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低磷日粮添加植酸酶对肉鸡营养学效应影响研究 总被引:9,自引:0,他引:9
280只同同壳的艾维茵肉鸡,随机分成4组,饲喂玉米--米糠--豆饼型日粮,采用饲养试验、代谢试验、生化指标分析等来研究低磷日粮添加植酸酶与磷酸氢钙,对共生长性能、组织中酶活和矿和质含量及蛋白质利用率影响。Ⅰ组为低磷组,Ⅱ组为添加磷酸氢钙组,Ⅲ、Ⅳ组为添加375,750u/kg的植酸酶组。试验结果表明:(1)添加 酶可提高钙、磷及蛋白质利用率,降低粪中磷的排泄量。(2)各组肝及胫骨中铜、锌、钙、磷含 相似文献
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