微生物菌剂与2种耕作方式下冬小麦生育期内土壤酶活性的动态变化

摘要: 通过田间小区试验，在秸秆还田的基础上研究了旋耕和深耕两种耕作方式以及添加不同外源微生物菌剂条件下，冬小麦不同生育期土壤脲酶、碱性磷酸酶和纤维素酶活性的动态变化特征。结果表明，旋耕和深耕没有明显影响土壤脲酶和纤维素酶的活性，而旋耕显著提高了碱性磷酸酶的活性；在小麦生育期内，土壤脲酶活性在拔节期明显降低，施入拔节肥后其活性逐渐增强，在孕穗期达到峰值；土壤碱性磷酸酶活性则随生育期的延长呈逐渐增加的趋势；土壤纤维素酶活性自返青至拔节逐渐降低，在拔节期达到最低，随着拔节期氮肥的施用其活性呈逐渐增加的趋势；无论是旋耕和深耕，小麦收获期土壤根区脲酶、碱性磷酸酶和纤维素酶的活性均显著高于非根区。此外，施用不同微生物菌剂对三种土壤酶的活性没有产生显著影响。

Dynamics of Soil Enzymes Activities under Two Types of Tillage and Different Microbial Inoculants during Growth of Winter Wheat

Dynamics of soil enzymes activities (soil urease,alkaline phosphatase,cellulase) were studied under two types of tillage and different microbial inoculants during winter wheat growing periods based on straws returned in a field using the plots experiment.The results showed that during the wheat growth stages,soil urease activity reduced markedly at jointing stage and increased gradually with nitrogen fertilizer applied,even reached the peak at the booting stage.Soil alkaline phosphatase activity increased s...