目录1.绪论11.1研究目的和意义.......................................................................................................11.2土壤酶研究进展.......................................................................................................11.3土壤酶活性的综述...................................................................................................21.4土壤酶活性影响因子...............................................................................................31.4.1土壤状况与土壤酶活性...................................................................................31.4.2土壤微生物、土壤动物与土壤酶活性...........................................................51.4.3农业耕作措施与土壤酶活性...........................................................................51.4.4植物生长与土壤酶活性...................................................................................71.5土壤CO2排放研究进展.........................................................................................71.6CO2排放研究方法..................................................................................................91.6.1箱法.....................................................................................................................91.6.2微气象法.........................................................................................................102.试验内容........................................................................................................................102.1试区概况...................................................................................................................102.2试验试剂与器材.......................................................................................................102.2.1供试材料........................................................................................................102.2.2试验器材........................................................................................................102.2.3试验试剂........................................................................................................102.3试验设置.................................................................................................................112.4测定方法.................................................................................................................112.5数据处理.................................................................................................................123.结果与分析....................................................................................................................123.1不同施氮措施对土壤酶活性的影响.....................................................................123.1.1不同施氮措施对土壤脲酶活性的影响.........................................................123.1.2不同施氮措施对土壤蔗糖酶活性的影响.....................................................133.1.3不同施氮措施对土壤过氧化氢酶活性的影响.............................................143.2不同施氮措施对土壤CO2排放量的影响............................................................153.3土壤酶活性与土壤CO2排放量相关性................................................................174．结论与讨论..........................................................................................................
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