Optimized tillage methods increase mechanically transplanted rice yield and reduce the greenhouse gas emissions  

作　　者：Shuang Cheng Zhipeng Xing Chao Tian Mengzhu Liu Yuan Feng Hongcheng Zhang 

机构地区：[1]Jiangsu Key Laboratory of Crop Cultivation and Physiology/Jiangsu Co-innovation Center for Modern Production Technology of Grain Crops/Research Institute of Rice Industrial Engineering Technology,Yangzhou University,Yangzhou 225009,China

出　　处：《Journal of Integrative Agriculture》2024年第4期1150-1163,共14页农业科学学报（英文版）

基　　金：jointly supported by the Key R&D Program of Jiangsu Province;China(BE2022338);the Jiangsu Agriculture Science and Technology Innovation Fund;China(CX(20)1012);the National Natural Science Foundation of China(31801293);a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD),China。

摘　　要：Biaxia lrotary tillage in dryland(DBRT)can complete biaxial rotary tillage with straw incorporation,secondary suppression,and ditching,and it has been previously studied in direct-seeded rice and wheat.However,the effects of DBRT on the mechanically transplanted rice yield and greenhouse gas emissions remain unclear.To evaluate the effects of DBRT on improving the food security of mechanically transplanted rice and reducing the greenhouse gas emissions,we conducted an experiment for two years with wheat straw incorporation.Three tillage methods were set up:DBRT,uniaxial rotary tillage in dryland and paddy(DPURT),and uniaxial rotary tillage in paddy(PURT).The results showed that compared with DPURT and PURT,DBRT increased the yield of machine-transplanted rice by 7.5-11.0%and 13.3-26.7%,respectively,while the seasonal cumulative CH_(4) emissions were reduced by 13.9-21.2%and 30.2-37.0%,respectively,and the seasonal cumulative N_(2)O emissions were increased by 13.5-28.6%and 50.0-73.1%,respectively.Consequently,DBRT reduced the global warming potential by 10.7-15.5%and 23.7-28.6%,respectively,andtheyield-scaledglobalwarmingpotentialby18.2-21.8%and36.4-39.3%,respectively,compared to DPURT and PURT.These results were mainly related to the fact that DBRT significantly reduced soil bulk density and increased soil redox potential(Eh).Therefore,implementing DBRT in machine-transplanted rice fields is feasible,which cannot only increase the rice yield,but also reduce the greenhouse gas emissions.

关 键 词：integrated tillage rice grain yield CH_(4) N_(2)O 

分 类 号：X71[环境科学与工程—环境工程] S511[农业科学—作物学]