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采用室内盆栽实验,通过对比秸秆覆盖于地表和掩埋到地下20 cm处不同秸秆还田方式对作物生长发育和土壤呼吸的影响,结果表明前者有助于增加作物的根粗和根体积,增强叶片光合作用,提高作物产量;增加土壤微生物数量,促进土壤营养元素的循环和转化;虽然在短期内会增加土壤呼吸作用,出现暂时的高土壤排碳,但是综合考虑土壤排碳和作物固碳的相互作用以及秸秆还田配套的人力物力财力,秸秆覆盖于地表最终有利于生态系统的固碳减排.
The effects of different straw mulching methods on crop growth and soil respiration were compared by covering pot experiments with straw and covering the ground 20 cm underground. The results showed that the former helped to increase root diameter and root volume, Photosynthesis, increase crop yield; increase the number of soil microorganisms, and promote soil nutrient cycling and transformation; although in the short term will increase soil respiration, temporary high soil carbon emissions, but taking into account soil carbon sequestration and carbon sequestration of crops Interaction and straw supporting the human and material resources and financial support, straw covering the surface eventually contribute to the ecosystem carbon sequestration.