秸秆与氮肥配施下土壤碳库周转和稳定性研究进展

Research Progress on the Turnover and Stability of Soil Carbon Pool Under Combined Application of Straw and Nitrogen Fertilizer

为了解秸秆与氮肥配施对土壤碳库周转和稳定性的影响,本文综述了秸秆与氮肥配施对土壤CO_(2)排放、碳固持和周转、有机碳库稳定性的影响。秸秆还田配施氮肥可调节土壤碳氮比,具有激发效应,土壤CO_(2)累积释放量较高;配施氮肥可促进还田秸秆的腐解,提高土壤碳库中新碳储量,影响土壤有机碳固持和周转;秸秆腐解后以不同组分的形式存在于土壤,配施氮肥可以增加土壤有效养分,影响土壤有机碳变化,有利于土壤有机碳库的稳定性。

In order to understand the effect of the combined application of straw and nitrogen fertilizer on the turnover and stability of soil carbon pool,this paper reviewed the effect of the combined application of straw and nitrogen fertilizer on soil CO_(2) emission,sequestration and turnover of soil carbon and soil organic carbon pool stability.Straw combined with nitrogen fertilizer could adjust the ratio of soil carbon to nitrogen,which had stimulating effect,and the cumulative release of soil CO_(2) was higher.Combined application of nitrogen fertilizer could promote the decomposition of straw returned to the field,increase the new carbon storage in soil carbon pool,and affect the sequestration and turnover of soil organic carbon.Straw existed in the form of different components after decomposition in the soil.Combined application of nitrogen fertilizer could increase soil available nutrients,affect the change of soil organic carbon,and be beneficial to the stability of soil organic carbon pool.