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
收稿日期: 2017-04-28
修回日期: 2017-06-10
网络出版日期: 2017-09-10
基金资助
国家自然科学基金资助项目(31501264, 31371581, 31671638);国家重点研发项目(2016YFD0300108, 2016YFD0300507);浙江省自然科学基金资助项目(LQ15C130003)
Effects of Interaction Between Irrigation Regimes and Nitrogen Rates on Rice Yield and Water and Nitrogen Use Efficiencies
Received date: 2017-04-28
Revised date: 2017-06-10
Online published: 2017-09-10
目的 研究不同水、氮管理模式对水稻产量以及水、氮利用效率的影响,以期为水稻高产与水、氮高效利用提供理论依据和技术参考。方法 大田试验于2015–2016年在浙江富阳进行,供试品种为三系籼型杂交稻天优华占。设置常规灌溉(CI)和干湿交替灌溉(AWD)两种灌溉模式,同时设置低氮(LN, 80 kg/hm2)、中氮(MN, 160 kg/hm2)和高氮(HN, 240 kg/hm2)3种施氮水平。结果 灌溉模式与施氮量对水稻产量以及水、氮利用效率有显著互作效应。与CI相比,AWD抑制无效分蘖,分蘖成穗率提高8.1%~10.7%;提高抽穗期至成熟期的光合势(LAD)与群体生长率(CGR);促进根系下扎,10~20 cm根层根系生物量增加了24.4%~32.3%,同时提高了结实期根系活性;促使茎鞘中非结构性碳水化合物(NSC)向籽粒中运转;且AWD在160 kg/hm2(中氮)施氮水平下可显著提高产量与水、氮利用效率,为本研究最佳的水、氮运筹模式。结论 通过适宜的水、氮运筹可充分发挥其互作效应,提高水稻产量与水、氮利用效率。
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 . DOI: 10.16819/j.1001-7216.2017.7048 513
【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 indica hybrid 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.
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