Effect of Returning Organic Materials on Greenhouse Gas Emissions and Rice Yield in Paddy Soil
Elucidating the effect of returning organic materials on paddy soil greenhouse gas emissions and rice yield is vital for farmland soil carbon management. Rice straw and its biochar were used as research objects to explore the change of early rice yield,greenhouse gas emission and soil physicochemical properties under the same carbon input condition. The results showed that compared with the control treatment,the early rice yield in straw and biochar returning treatments increased by 4.71％ and 17.2％,respectively. Biochar returning significantly reduced the greenhouse gas emission intensity of paddy soils (P<0.05),while straw returning significantly increased CH4 emission flux,greenhouse effect index and greenhouse gas emission intensity (P<0.05). Biochar returning can both increase the early rice yield and decrease the greenhouse gas emissions in paddy soil. However,straw returning has a limited effect on rice yield increase and exhibits a high risk of environmental greenhouse effect.
crop strawbiocharyieldgreenhouse effectlow-carbon agricultureorganic matter return to fieldgreenhouse gas emissionssoil physicochemical properties
万方数据
维普
