Comparative study on annual yield, water consumption, irrigation water use efficiency and economic benefits of different rice-oilseed rape rotation systems in Central China
Comparative study on annual yield, water consumption, irrigation water use efficiency and economic benefits of different rice-oilseed rape rotation systems in Central China
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DOI：
10.1016/j.agwat.2021.106741
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发表时间：
2021-03
影响因子：
6.7
通讯作者：
Aibin He;Bo Yuan;Zhaoqiang Jin;Jianguo Man;S. Peng;Li Zhang;Hongyan Liu;Lixiao Nie
中科院分区：
文献类型：
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作者：
Aibin He;Bo Yuan;Zhaoqiang Jin;Jianguo Man;S. Peng;Li Zhang;Hongyan Liu;Lixiao Nie
直播种植模式具有省工、投入成本低、水分利用效率高、管理方便等优点，被认为是替代移栽种植模式的一种切实可行的种植模式。然而，不同直播稻-油轮作系统与传统移栽稻-移栽油轮作系统（TTR-TPO）的比较研究很少。本研究比较了2018 - 2020年水稻和油菜生长季不同稻油轮作制度的年产量、耗水量、水分利用效率和经济效益。结果表明，湿直播稻-直播油菜轮作（WDSR-DSO）和湿直播稻-移栽油菜轮作（WDSR-TPO）的年均产量和耗水量显著高于TTR-TPO和TTR-DSO。旱直播稻-直播油菜轮作系统（DDSR-DSO）与TTR-TPO的年产量相近，但耗水量比TTR-TPO平均减少22.6%。DDSR-DSO的灌溉水利用效率（WUEI）和净经济效益最高，分别比TTR-TPO高72.3%和15.2%。而WDSR-DSO、WDSR-TPO和传统移栽稻-直播油菜轮作体系（TTR-DSO）的WUEi和净经济收益率相近。在这里，我们表明，DDSR-DSO是一个替代TTR-TPO在中国中部地区，由于更高的WUEi和净经济回报，更少的耗水量和类似的年产量。此外，WDSR-DSO和WDSR-TPO可能适用于在整地过程中土壤水坑水位高且水稻生长季节降雨充足的地区。
Direct seeded planting pattern is considered as a practicable substitute to transplanting planting pattern because it has the advantages of saving labor, low input cost, high water use efficiency, and easy to manage. However, the comparison between different direct seeded rice-oilseed rape rotation systems and traditional transplanting rice-transplanting oilseed rape rotation system (TTR-TPO) has rarely been studied. In this study, the annual yield, water consumption, water use efficiency and economic benefits of different rice-oilseed rotation systems were compared during the rice and oilseed rape growing seasons from 2018 to 2020. Our results show that the average annual yield and water consumption of wet direct seeded rice-direct seeded oilseed rape rotation system (WDSR-DSO) and wet direct seeded rice-transplanting oilseed rape rotation system (WDSR-TPO) were significant higher than that of TTR-TPO and TTR-DSO. Annual yield of dry direct seeded rice-direct seeded oilseed rape rotation system (DDSR-DSO) and TTR-TPO was similar, but the water consumption of DDSR-DSO was reduced by 22.6% on an average than that of TTR-TPO. Irrigation water use efficiency (WUEi) and net economic return of DDSR-DSO were the highest, which were 72.3% and 15.2% higher than TTR-TPO, respectively. On the contrary, WUEiand net economic return was similar between WDSR-DSO, WDSR-TPO and TTR-TPO, traditional transplanting rice-direct seeded oilseed rape rotation system (TTR-DSO). Here, we show that DDSR-DSO is an alternative to TTR-TPO in central China due to higher WUEiand net economic return, less water consumption and similar annual yield. In addition, WDSR-DSO and WDSR-TPO may be suitable for regions where water levels are high for soil puddling during land preparation and rainfall is sufficient in the rice growth season.