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| 不同还田模式下玉米秸秆的腐解特征及对土壤养分的影响 |
| Decomposition Characteristics of Maize Stover and Its Effects on Soil Nutrients Under Different Returning Modes |
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| DOI： |
| 中文关键词: 秸秆还田 腐解率 土壤养分 |
| 英文关键词:Returning straw to the field Decompose rate Soil nutrient |
| 基金项目:2023年国家级大学生创新创业训练计划项目(202310723026);陕西省高校科协青年人才托举计划项目( 20200207);国家自然科学基金青年项目（31701416）。 |
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| 中文摘要: |
| 本研究以玉米秸秆为研究对象，采用尼龙网袋法初步分析了翻压15 cm、30 cm和地表覆盖三种不同秸秆还田方式下、不同时间的腐解特征及土壤中全氮、全磷和全钾的变化。结果表明：（1）秸秆腐解累积量随着时间的推移而增加，腐解率呈现前期增加快后期增加缓慢的趋势；（2）玉米秸秆翻埋还田的腐解率较地表覆盖快，其中翻埋15 cm＞翻埋30 cm＞地表覆盖；（3）不同玉米秸秆还田模式均对土壤中N、P、K的提高有积极的作用，且在一定的还田时间内土壤中全氮、全磷和全钾含量变化均呈现先快后慢的趋势，翻埋15 cm的促进效果优于其他两种还田方式。因此，秸秆还田腐解可补充土壤中氮、磷、钾等的消耗，对提高作物产量和品质具有重要意义。 |
| 英文摘要: |
| With maize straw as the research object,nylon net bag method was used to analyze the decomposition characteristics and the changes of total nitrogen,total phosphorus and total potassium in soil at different times under three different straw returning modes: plowing at depths of 15 cm,30 cm,and surface mulching. The results showed that: (1) The decomposition accumulation of straw increased with time,and the decomposition rate increased rapidly in the early stage and slowly in the later stage; (2) The decomposition rate of maiz straw was faster than that of surface mulch,in which the soil was buried 15 cm > 30 cm > surface mulch; (3) Different maize straw returning modes had a positive effect on the increase of N,P and K in soil,and the changes of total nitrogen,total phosphorus and total potassium contents in soil showed a trend of first fast and then slow within a certain returning time. The promotion effect of burying 15 cm was better than that of the other two returning modes. In summary,returning straw to the field helps replenish nitrogen,phosphorus,potassium,and other nutrients in the soil,which is important for improving crop yield and quality. |
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