| Cite this article: | 王冰蕊,才硕,郭巧玲,等.水稻抗氧化性及产量对稻田淹涝退水过程的响应研究[J].灌溉排水学报,0,():-. |
| wangbingrui,caishuo,guoqiaoling,et al.水稻抗氧化性及产量对稻田淹涝退水过程的响应研究[J].灌溉排水学报,0,():-. |
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| Response of Rice Oxidation Resistance and Yield to the Process of Rice Field Waterlogging and Drainage |
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wangbingrui1,2, caishuo2, guoqiaoling1, shihong1,2, shiyuanzhi3, zhaoshujun4, jiangchengming2
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1.East China University of Technology;2.Jiangxi Central Station of Irrigation Experiment;3.Nanjing Hydraulic Research Institute;4.China Three Gorges University
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| Abstract: |
| Abstract: 【Objective】May to July every year is the nutrient growth period of rice in Poyang Lake area, which is also the plum rainy season in southern China, and rice is vulnerable to flood stress. The purpose of this paper is to explore the effects of different waterlogging regression processes on oxidation resistance and yield of rice during the plum rainy season in Poyang Lake area. 【Method】The experiment was conducted at a pot scale with semilate rice of elongation stage. There were three sediment content treatments: 0 kg/m3(S0), 0.10 kg/m3(S1), 0.25 kg/m3(S2), and two subermerged duration treatments: 3d(F1), 6d(F2). For each combination of three sediment content treatments and two subermerged duration treatments, we also compared two drainage duration treatments: 3d(D1), 6d(D2); the control (CK) was no amendment-normal water-controlled growth, and a total of 13 treatments. In each treatment, we measured the SPAD value, activity of antioxidant enzyme in the flag leaf and yield of rice, from which we explored the response mechanism of rice to different waterlogging regression processes. 【Result】①The SPAD value of flag leaf decreased with increasing sediment content, submerged duration or water withdrawal duration, each treatment reached the lowest value before drainage. And the S2F2D2 showed the largest decrease after continuously submerged for 6 days, which decreased by 46.20%, compared with the CK. ②The activities of SOD, POD, and MDA content in rice flag leaves increased first and then decreased during the different waterlogging regression processes, all of them reached the maximum value before drainage. ③After different waterlogging drainage treatment, the 1000-grain weight of semilate rice was significantly different from CK (P<0.05), which led to a decrease in the rice yield. S0F2D2 and S2F2D2 treatments had serious yield reductions, reaching 52.22% and 52.00% respectively compared with the CK.【Conclusion】Affected by the different waterlogging and drainage processes at the elongation stage, the oxidation resistance of the semilate rice leaves was enhanced and the yield decreased. Compared with sediment content, the subermerged duration and drainage duration are the main factor affecting rice yield, which is manifested in the longer the flooding period, the greater the yield reduction. Therefore, under the conditions of this experiment, the waterlogging and drainage time of the middle rice elongation period is controlled within 6 days, which can effectively reduce the disaster of rice and flood losses. |
| Key words: rice; waterlogging; sediment content; drainage; oxidation resistance |
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