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

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

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Biaxial rotary 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 CH4 emissions were reduced by 13.9-21.2%and 30.2-37.0%,respectively,and the seasonal cumulative N2O 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,and the yield-scaled global warming potential by 18.2-21.8%and 36.4-39.3%,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.

integrated tillagericegrain yieldCH4N2O

Shuang Cheng、Zhipeng Xing、Chao Tian、Mengzhu Liu、Yuan Feng、Hongcheng Zhang

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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

Key Research and Development Program of Jiangsu Province,ChinaJiangsu Agriculture Science and Technology Innovation Fund,China国家自然科学基金Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD),China

BE2022338CX20101231801293

2024

10.1016/j.jia.2023.05.033

农业科学学报(英文)
中国农业科学院农业信息研究所

农业科学学报(英文)

CSTPCD
影响因子：0.576
ISSN：2095-3119
年,卷(期)：2024.23(4)
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