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首页> 外文会议>Effective Utilization of Agricultural Soil amp; Water Resources and Protection of Environment >Effect of Water Recovery and Fertilizer after Stress on Physiological Properties and Grain Yield of Paddy
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Effect of Water Recovery and Fertilizer after Stress on Physiological Properties and Grain Yield of Paddy

机译：胁迫后的水分复施肥对水稻生理特性和籽粒产量的影响。

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Pots experiment was conducted to investigate the effects of rewatering and application of nitrogen fertilizer after water stress on physiological properties,grain yield and water requirement of paddy.The results indicated that net photosynthetic rate(Pn),transpiration rate(Tr) and water use efficiency (WUE)of treatment under stress were higher than those of full irrigation treatment (CK).The tendency was maintained long time until the later stage.Application of nitrogen fertilizer after water stress had the same effects as that of water stress.Chlorophyll contents of leaf under mild stress were higher than full irrigation both during and after stress period and lower for the severe stress treatments during stress period and higher in the later stages,Fertilization after rewatering could increase chlorophyll contents and suspend senescence of leaf.Stress in Tillering stage did not decrease accumulation of dry matter and grain yield.However,it decreased water requirement and resulted in higher economic coefficient of paddy.Fertilization after stress could stimulate accumulation of dry matter but decrease grain yield because of the lower HI,compared to full irrigation treatments,suggesting fertilization after stress in the Tillering stage is not recommended for watersaving irrigation on paddy.
机译：通过盆栽试验研究了水分胁迫后复水和施用氮肥对水稻生理特性，籽粒产量和需水量的影响。结果表明净光合速率（Pn），蒸腾速率（Tr）和水分利用效率胁迫下的施肥量（WUE）高于完全灌溉法（CK）。这种趋势一直保持到后期，水分胁迫后施用氮肥的效果与水分胁迫相同。轻度胁迫下的叶片在胁迫期间和之后均高于全灌，而在胁迫期间重度施肥则较低，后期则较高，复水后施肥可增加叶片的叶绿素含量并延缓衰老。不会减少干物质的积累和谷物产量。但是，它减少了需水量并导致较高的水稻经济系数。胁迫后的施肥可能会刺激干物质的积累，但由于HI较低，因此与全灌处理相比，不建议在分iller期进行胁迫后施肥，以免水稻节水。

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