不同秸秆还田模式下麦田土壤养分变化特征

Variation Characteristics of Soil Nutrients in Wheat Field under Different Straw Returning Modes

本文通过研究不同施肥处理以及不同比例的秸秆还田对麦田土壤养分的变化特征,为小麦种植提供科学建议。结果表明,不同秸秆还田处理下对土壤全氮含量影响不大。相比CK,NPKS处理在0~20 cm土层有效磷增加了7.4 mg/kg,20~40 cm土层增加了1.2 mg/kg,40~60 cm土层的有效磷含量为15.8 mg/kg,较CK增加8.3 mg/kg。速效钾在0~20 cm和40~60 cm土层厚度的含量较CK增加55.7 mg/kg、22.9 mg/kg,但差异并不显著。说明秸秆全量还田与化肥配施(NPKS)有助于土壤养分的积累。

This paper has provided scientific advice for wheat cultivation by studying the change character-istics of different fertilization treatments and different proportions of straw returning to the soil nutrients in wheat fields. The results showed that the different treatments of returning straw to the field had little effect on the total nitrogen content of the soil. Compared with CK, NPKS treatment has an increase of 7.4 mg/kg in the 0 - 20 cm soil layer, 1.2 mg/kg in the 20 - 40 cm soil layer, and 15.8 mg/kg in the 40 - 60 cm soil layer. CK increased by 8.3 mg/kg. The content of available potassium in 0 - 20 cm and 40 - 60 cm soil layer thickness increased by 55.7 mg/kg and 22.9 mg/kg compared with CK, but the difference was not significant. It shows that the full return of straw and the combined application of chemical fertilizers (NPKS) can help the accumulation of soil nutrients.