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首页> 美国卫生研究院文献>Journal of Zhejiang University. Science. B >Effects of nitrogen fertilization strategies on nitrogen use efficiency in physiology recovery and agronomy and redistribution of dry matter accumulation and nitrogen accumulation in two typical rice cultivars in Zhejiang China
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Effects of nitrogen fertilization strategies on nitrogen use efficiency in physiology recovery and agronomy and redistribution of dry matter accumulation and nitrogen accumulation in two typical rice cultivars in Zhejiang China

机译：施氮策略对两个典型水稻品种生理恢复和农艺氮素利用效率的影响以及干物质积累和氮素积累的再分配

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摘要

Field experiments were conducted in farmers’ rice fields in 2001 and 2002 to study the effects of nitrogen (N) management strategies on N use efficiency in recovery (RE), agronomy (AE) and physiology (PE) and redistribution of dry matter accumulation (DMA) and nitrogen accumulation (NA) in two typical rice cultivars in Jinhua, Zhejiang Province. This study aimed mainly at identifying the possible causes of poor fertilizer N use efficiency (NUE) of rice in Zhejiang by comparing farmers’ fertilizer practice (FFP) with advanced site-specific nutrient management (SSNM) and real-time N management (RTNM). The results showed that compared to FFP, SSNM and RTNM reduced DMA and NA before panicle initiation and increased DMA and NA at post-flowering. There is no significant difference between SSNM and FFP in post-flowering dry matter redistribution (post-DMR) and post-flowering nitrogen redistribution (post-NR). These results suggest that high input rate of fertilizer N and improper fertilizer N timing are the main factors causing low NUE of irrigated rice in the farmer’s routine practice of Zhejiang. With SSNM, about 15% of the current total N input in direct-seeding early rice and 45% in single rice could be reduced without yield loss in Zhejiang, China.
机译：2001年和2002年在农民的稻田中进行了田间试验，研究了氮（N）管理策略对氮利用效率在恢复（RE），农艺（AE）和生理（PE）以及干物质积累的重新分配方面的影响（浙江省金华市两个典型水稻品种的DMA和氮素积累（NA）。本研究主要通过比较农民的施肥措施（FFP）与先进的特定地点养分管理（SSNM）和实时氮管理（RTNM）来确定浙江省水稻氮肥利用率低的可能原因。 。结果表明，与FFP相比，SSNM和RTNM在穗开始前降低DMA和NA，在开花后增加DMA和NA。花后干物质再分配（DMR后）和花后氮再分配（NR后）之间，SSNM和FFP之间没有显着差异。这些结果表明，在浙江农民的常规耕作中，高氮肥投入率和不适当的氮肥施用时机是造成灌溉稻NUE较低的主要因素。使用SSNM，在中国浙江，可以减少目前播种的早稻中总氮输入的约15％，单稻中氮输入的45％，而不会减产。

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