中国水稻科学2017，Vol.31Issue(5)：513-523,11.DOI:10.16819/j.1001-7216.2017.7048
灌溉模式与施氮量交互作用对水稻产量以及水、氮利用效率的影响
Effects of Interaction Between Irrigation Regimes and Nitrogen Rates on Rice Yield and Water and Nitrogen Use Efficiencies
摘要
Abstract
[Objective]In order to lay a scientific basis for high yield and high water and nitrogen use efficiencies in rice production, we estimated the effects of the interaction between the alternate wetting and drying (AWD) regime and different nitrogen rates on grain yield, water and nitrogen use efficiencies.[Method]The field experiments were conducted with two irrigation regimes, AWD and conventional irrigation (CI) and three N rates, 80 (low amount, LN), 160 (medium amount, MN) and 240 kg/hm2 (high amount, HN) in Fuyang, Zhejiang Province in 2015 and 2016. The local high-yielding rice cultivar Tianyouhuazhan (three-line indicahybrid combination) was used as experimental material.[Result]There was an obvious interaction between irrigation regimes and N rates. When compared with CI regime, AWD could reduce redundant vegetative growth and control the number of rice tillers, improve the percentage of productive tillers by 8.1%-10.7%; increase the leaf area duration (LAD) and crop growth rate (CGR) from heading to maturity; increase root dry weight at a depth of 10-20 cm at heading by 24.4%-32.3%, and the root oxidation activity (ROA) during the re-watering period after heading; AWD could promote the remobilization of non-structural carbohydrates (NSC) in culms and sheaths for grain filling. The grain yield, water and nitrogen use efficiencies were the highest in the combination of AWD and MN due to the improved population quality and grain filling, and the combination of AWD and MN was the best water-nitrogen management model in this study.[Conclusion]The aim of high grain yield and high water and nitrogen use efficiencies could be achieved through integrating AWD with the medium amount of nitrogen application in rice production.关键词
水稻/产量/水分利用率/氮肥利用效率/水氮互作Key words
rice/yield/water use efficiency/nitrogen use efficiency/interaction between nitrogen rates and irrigation regimes分类
农业科技引用本文复制引用
褚光,陈婷婷,陈松,徐春梅,王丹英,章秀福..灌溉模式与施氮量交互作用对水稻产量以及水、氮利用效率的影响[J].中国水稻科学,2017,31(5):513-523,11.基金项目
国家自然科学基金资助项目(31501264, 31371581, 31671638) （31501264, 31371581, 31671638）
国家重点研发项目(2016YFD0300108, 2016YFD0300507) （2016YFD0300108, 2016YFD0300507）
浙江省自然科学基金资助项目(LQ15C130003). （LQ15C130003）
