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Integrated Water and Nitrogen Management Practices to Enhance Yield and Environmental Goals in Rice-Ratoon Rice Systems

文献类型： 外文期刊

作者： Zhang, Lin 1 ; Jiang, Peng 1 ; Gou, Xiaoyi 1 ; Zhou, Xingbing 1 ; Zhu, Yongchuan 1 ; Liu, Mao 1 ; Xiong, Hong 1 ; Xu, Fux 1 ;

作者机构： 1.Sichuan Acad Agr Sci, Rice & Sorghum Res Inst, Deyang 618000, Sichuan, Peoples R China

2.Minist Agr, Key Lab Southwest Rice Biol & Genet Breeding, Deyang 618000, Sichuan, Peoples R China

3.Natl Rice Improvement Ctr, Luzhou Branch, Luzhou 646100, Sichuan, Peoples R China

期刊名称：AGRONOMY JOURNAL （ 影响因子：2.24； 五年影响因子：2.829 ）

ISSN： 0002-1962

年卷期： 2019 年 111 卷 6 期

页码：

收录情况： SCI

摘要： Water and N management play a vital role in rice (Oryza sativa L.) production; however, limited information is available on the options to increase rice yield in rice-ratoon rice systems, including an appropriate combination of water regime (W), N application rate (N-AR) and N application method (N-AM). To address this question, field experiments were conducted with two Ws [simplified alternate wetting and drying (SAWD) and continuous flooding (CF)], four N-ARs (control, N-0; 180 kg N ha(-1), N-180; 255 kg N ha(-1), N-255; and 330 kg N ha(-1), N-330) and two N-AMs[45% of fertilizer pre-plant, 15% of fertilizer at tilling, 40% of fertilizer at bud (BTB) and 45% of fertilizer preplant, 15% of fertilizer at boot, 40% of fertilizer during grain filling (BPG)]. On average, the grain yields of the main crop, the ratoon crop, and their total for SAWD were 3.7%, 6.8%, and 4.4% higher than for CF, respectively. The relationships between N-AR and the main crop, ratoon crop, and total yields were well fitted by quadratic equations. The rice yields of the main crop, ratoon rice, and their total under BPG were equal to or slightly higher than those under BTB. The interactive effect of WxN(AR) was significant on the main rice crop yield and total rice yield, but WxN(AM), N(AR)xN(AM) and WxN(AR)xN(AM) were all related to the soil-based yield. The use of integrated water and N management practices could achieve high yields and reduce water and N inputs in rice-ratoon rice systems.

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