Journal of Integrative Agriculture ›› 2024, Vol. 23 ›› Issue (4): 1150-1163.DOI: 10.1016/j.jia.2023.05.033

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优化耕作方式提高了机插水稻的产量并降低了稻田的温室气体排放

  

  • 收稿日期:2023-02-06 接受日期:2023-05-15 出版日期:2024-04-20 发布日期:2024-03-29

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

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

  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

  • Received:2023-02-06 Accepted:2023-05-15 Online:2024-04-20 Published:2024-03-29
  • About author:Shuang Cheng, E-mail: 1692135738@qq.com; #Correspondence Hongcheng Zhang, E-mail: hczhang@yzu.edu.cn; Zhipeng Xing, E-mail: zpxing@yzu.edu.cn
  • Supported by:

    This study was 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) and a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), China.


摘要:      旱地双轴旋耕法可一次作业完成双轴旋耕秸秆还田、两次镇压和开沟作业,且这一方法在直播稻和小麦上已有初步的研究。然而,旱地双轴旋耕法对机插水稻产量和温室气体排放的影响尚不清楚。为了评估旱地双轴旋耕法在提高机械移栽水稻的粮食安全和减少温室气体排放方面的效果,我们在秸秆还田条件下进行了为期2年的研究。设置了三种耕作方式:旱地双轴旋耕(DBRT)、旱地水田单轴旋耕法(DPURT)和水田单轴旋耕法(PURT)。结果表明,与DPURTPURT相比,DBRT分别使机插水稻增产7.5-11.0%13.3-26.7%,而季节性累计CH4排放量分别减少了13.9-21.2%30.2-37.0%N2O季节性累计排放量分别增加了13.5-28.6%50.0-73.1%。因此,与DPURTPURTDBRT 分别使全球变暖潜能值分别降低了10.7-15.5%23.7-28.6%,并使单位产量的全球增温潜值分别降低了18.2-21.8%36.4-39.3%。这些结果主要与DBRT显着降低土壤容重和增加土壤Eh有关。因此,在机插稻田实施DBRT是可行的,既有利于提高水稻产量,又可以减少温室气体排放。

Abstract: 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

Key words: integrated tillage ,  rice ,  grain yield ,  CH4 ,  N2O