中国水稻科学2017，Vol.31Issue(4)：379-390,12.DOI:10.16819/j.1001-7216.2017.7006
干湿交替灌溉对抗旱性不同水稻品种产量的影响及其生理原因分析
Effects of Alternate Wetting and Drying Irrigation on Grain Yield in Rice Cultivars with Different Drought Resistance and Its Physiological Mechanism
摘要
Abstract
[Objective]We aim to reveal the effects of alternate wetting and irrigation during whole growth period on grain yield in rice cultivars with different drought resistance and its physiological mechanisms.[Method]With four rice cultivars differed in drought resistance, Yangdao 6 and Liangyoupeijiu (indica), Hanyou 8 and Zhendao 88 (japonica), as materials, three water management regimes, i.e. CI (conventional irrigation), WMD (alternate wetting and moderate drying irrigation) and WSD (alternate wetting and severe drying irrigation) during the whole growing season were conducted to investigate their effects on grain yield in a pot experiment.[Result]Compared with CI, WMD significantly increased the grain yields of Yangdao 6 and Hanyou 8 with higher drought resistance by 6.9% and 7.5%, and decreased those of Liangyoupeijiu and Zhendao 88 with lower drought resistance by 7.28% and 8.10%, respectively. Under WSD, the grain yields of four cultivars all decreased significantly, but the yield declines in Liangyoupeijiu and Zhendao 88 were much higher than those in Yangdao 6 and Hanyou 8. Under WMD, root oxidation activity, cytokinin (zeatin + zeatin riboside) content in roots and leaves, leaf photosynthetic rate and water potential, activities of enzymes involved in sucrose-to-starch conversion in grains were all significantly increased in Yangdao 6 and Hanyou 8 after re-watering and they were all nearly the same or decreased in Liangyoupeijiu and Zhendao 88. Under WSD, these indices were all decreased in four rice cultivars. [Conclusion] Stronger root oxidation activity, higher cytokinin (zeatin + zeatin riboside) content in roots and leaves, greater photosynthetic rate and water potential of leaves and activities of enzymes involved in sucrose-to-starch conversion in grains after re-watering were the basic physiological characteristics in rice cultivars with strong drought resistance under WMD.关键词
水稻/干湿交替灌溉/产量/根系/光合速率/关键酶/蔗糖-淀粉代谢/生理原因Key words
rice/alternate wetting and drying irrigation/grain yield/root/photosynthetic rate/key enzyme/sucrose-to-starch conversion/physiological reason分类
农业科技引用本文复制引用
卞金龙,蒋玉兰,刘艳阳,冯咏芳,刘贺,夏仕明,刘立军..干湿交替灌溉对抗旱性不同水稻品种产量的影响及其生理原因分析[J].中国水稻科学,2017,31(4):379-390,12.基金项目
国家自然科学基金资助项目(31671614 （）
31371562) （）
国家公益性行业(农业)专项(201203031) （农业）
江苏省科技成果转化专项资金资助项目(BA2014074). （BA2014074）
