不同施肥水平对小麦生长期土壤氧化还原酶活性的影响  

Effect of Different Fertilizer Levels on Soil Oxidoreductases Activities in Wheat Growing Stage

作　　者：刘磊[1] 谷洁[2] 高华[2] 张社奇[1] 夏雪[2] 解媛媛[1] 

机构地区：[1]西北农林科技大学理学院,陕西杨凌712100 [2]西北农林科技大学资源环境学院,陕西杨凌712100

出　　处：《水土保持通报》2010年第6期12-16,共5页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金(40771109;40871119);国家科技支撑计划(2007BAD89B16;2008BADA4B09)

摘　　要：在有机肥和氮肥配施条件下,设置不同有机肥和氮肥的施肥梯度,研究了小麦各生育期土壤氧化还原酶活性(包括过氧化氢酶、脱氢酶和多酚氧化酶活性)的动态变化趋势。结果表明,与单施有机肥或单施氮肥相比,有机肥和氮肥配施条件下,土壤过氧化氢酶和脱氢酶活性均有明显提高。在有机肥用量22500kg/hm2、氮肥用量120kg/hm2条件下,土壤过氧化氢酶和脱氢酶活性均达到最高,分别为1.1750ml/(g.20min)和15.7931ug/(g.d)。但是,随着肥料的施加,土壤多酚氧化酶活性降低,当有机肥用量和氮肥用量达到最大时,多酚氧化酶活性降至最低。Under the different conditions of organic manure and nitrogen fertilizer,the dynamic change trend of soil oxidoreductases activities is studied.Results showed that compared with organic fertilizer or N fertilizer,soil catalase and dehydrogenase activities significantly increased under organic and N fertilizer conditions.With organic fertilizer of 22 500 kg/hm2 and N fertilizer of 120 kg/hm2,the activities of soil catalase and dehydrogenase were highest,being 1.175 0 〔0.1 ml/（g·20 min）〕 and 15.793 1 ug/（g·d）,respectively.Soil polyphenol oxidase activity decreased with the increase in the amount of organic and nitrogen fertilizer.

关 键 词：氧化还原酶 有机肥 氮肥 小麦生长期 

分 类 号：S141[农业科学—肥料学] S143[农业科学—农业基础科学]