秸秆还田方式对春播期土壤温度的影响

Effect of different straw returning methods on soil temperature in spring sowing period

在黑龙江旱作耕地土壤和春播期气候条件下,对秸秆深施还田和覆盖还田耕地以及对照地的土壤温度进行了测试和分析。结果表明,秸秆深施还田耕地土壤日平均温度(9.1℃)高于覆盖还田耕地和对照地的土壤温度(8.3和7.9℃),秸秆深施还田与秸秆覆盖还田和对照地的土壤温度具有显著差异(P<0.05);并且随着秸秆深施还田量的增加,对土壤的保温和调控作用加强;深施秸秆处周围的土壤温度随其距离的增大而减弱,呈线性规律变化,对其两侧幅宽30cm的土壤温度有明显的提升作用。

Under the special climate in spring sowing time in Northeast of China,the soil temperature in straw returning land and no-straw land was studied.The soil temperature in straw deep application land （9.1℃） was higher than that in straw mulching land and no-straw land（8.3 and 7.9℃）.The difference was significant among straw deep application,straw mulching and control groups in soil temperature（P0.05）.There was a significant improvement of soil temperature in straw deep application land,and the role of insulation and regulation on soil strengthening with the increasing applied straw.The influence of deeply applied straw made soil temperature gradually weak with the depth.The soil temperature and distance showed a linear relationship.The straw enhanced the soil temperature significantly in the range of 30 cm width on both sides.