| Cite this article: | 肖新.南方地区水肥调控下水稻节水减排效应研究[J].灌溉排水学报,2022,():-. |
| xiaoxin.南方地区水肥调控下水稻节水减排效应研究[J].灌溉排水学报,2022,():-. |
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| Research on water saving and emission reduction effect of rice under water and fertilizer regulation in southern China |
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xiaoxin
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Yangtze University
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| Abstract: |
| 【Objective】In order to reveal the comprehensive effect of water and fertilizer regulation of rice in the southern plains, and to optimize the field water and fertilizer regulation mode, the law of water and nitrogen cycle is
researched in paddy fields to provide references for water and fertilizer management and non-point source pollution prevention and control in the Poyang Lake Basin.【Method】This experiment was carried out at the Jiangxi Provincial Irrigation Experiment Center Station in Ganfu Plain Irrigation Area of Poyang Lake Basin. Two irrigation modes, intermittent irrigation (W1) and flooding (W0), and three nitrogen application levels, no nitrogen (N0), reduced nitrogen (N1,135kg/hm2) and conventional nitrogen (N2, 180kg/hm2) were considered. The effects of water saving, yield increase, pollution control and emission reduction under different water and fertilizer regulation schemes were analyzed.【Result】The results show that the irrigation mode has a significant impact on the amount of irrigation, leakage and drainage. Compared with W0, the water consumption of W1 is reduced by 4.25% to 16.33%, the leakage is reduced by 13.68% to 22.85%, and the average amount of water saved is 28.77%. Under N1 and N2 fertilization treatments, the average yield of W1 increased by 16.57% and 29.94% compared with W0, respectively. Compared with W0, the TN emission load under W1 decreased by 16.42% on average. Under the same irrigation mode, the level of TN emission load corresponded with the increase of nitrogen application rate. The fertilization level in the rice season had a significant effect on the total ammonia volatilization emission, while the irrigation mode and the interaction of water and fertilizer had no significant effect on the total ammonia volatilization emission.【Conclusion】 The optimal water and fertilizer interaction model is W1N1, under which the production increased by 9.82%, the amount of irrigated water saved by 27.54%, the amount of pollution reduced by 25.67%, and the emissions of pollution reduces by 11.90% compared with the local traditional model W0N2. |
| Key words: Water saving and emission reduction; water and fertilizer interaction; ammonia volatilization; paddy field; irrigation mode |
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