Authors

Abstract

In order to explore the best working method of corn straw decomposition for field return under extreme cold temperature conditions in Northeast China. The orthogonal test method was used to test and analyze the decay of corn straw by using the factors of straw return depth, straw return amount, straw stalk part and decomposer concentration. The results showed that the most significant effect on the decomposition efficiency of cold land corn straw was the amount of straw returned to the field, followed by the concentration of decomposer and the depth of straw returned to the field, and the least effect was the straw part. Among them, the amount of straw returned to the field showed a negative correlation on the decomposition efficiency of cold land corn straw; the concentration of decomposer, the depth of straw returned to the field and the straw part showed a positive correlation on the decomposition efficiency of cold land corn straw. Under the conditions of this experiment, a small amount of straw accompanied by an additional application of decomposer was returned to the field in depth burial to best facilitate straw decomposition.

Abstract in Chinese

为了探索中国东北地区在极寒温度条件下玉米秸秆腐解还田的最佳工作方式。采用正交试验法，对秸秆还田深度、秸秆还田量、秸秆茎部位、腐解剂浓度等因素对玉米秸秆进行腐解试验与分析。结果表明，对寒地玉米秸秆腐解率的影响最为显著的是秸秆还田量，其次是腐解剂浓度、翻埋深度，影响最小的是秸秆部位。其中秸秆还田量对寒地玉米秸秆腐解率呈现负相关关系；腐解剂浓度、翻埋深度、秸秆部位对寒地玉米秸秆腐解率呈现正相关关系。在本试验条件下，少量秸秆伴随增施腐解剂深埋还田最有利于秸秆腐解。