黑龙江省半干旱地区生长季玉米秸秆腐解特征研究

Study on Decomposition Characteristics of Maize Straw in Semi-arid Region of Heilongjiang Province During Growing Season

为实现黑龙江省半干旱地区玉米秸秆全量还田,采用尼龙网袋法在生长季进行不同耕层深度秸秆腐解玉米秸秆质量损失率及腐解速率变化研究。结果表明:秸秆质量损失率最大和秸秆腐解速度最快的耕层均为10~20 cm,秸秆质量损失率和秸秆腐解速度最快的时期为埋入耕层后90 d,此时正值雨热同期,有利于加快秸秆腐解。

In order to realize the full return of maize straw to the field in semi-arid area of Heilongjiang Province,study on the weight loss rate and decay rate of maize straw decomposed by different ploughing depth in growing season with nylon net bag method was carried out.The result showed that the plough layer with the highest loss rate of straw and the fastest decomposing rate of straw was 10-20 cm.The fastest loss rate of straw and the fastest decomposing rate of straw were 90 d after burying the plough layer.At the same time of rain and heat,it was beneficial to accelerate straw decomposition.