| 花后营养调控对冬小麦灌浆期物质生产、氮素吸收及再运移的影响 |
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| 引用本文： | 卢殿君,陈新平,张福锁,崔振岭,贺明荣,王振林.花后营养调控对冬小麦灌浆期物质生产、氮素吸收及再运移的影响[J].中国农学通报,2013,29(9):57-60. |
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| 作者姓名： | 卢殿君 陈新平 张福锁 崔振岭 贺明荣 王振林 |
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| 作者单位： | 1. 中国农业大学资源与环境学院,北京,100193
2. 山东农业大学,山东泰安,271000 |
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| 基金项目： | 国家"973"项目"主要粮食作物高产栽培与资源高效利用的基础研究"第6子课题 |
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| 摘 要： | 花后营养调控已成为高产超高产冬小麦栽培中抗早衰,增加籽粒重的重要措施之一.为了验证花后不同养分调控策略对高产超高产冬小麦灌浆期物质生产,氮素吸收及再转移的影响,并为高产超高产冬小麦花后养分调控提供理论支撑,在大田试验中,研究了花后1次氮肥调控、4次氮肥调控、喷施磷酸二氢钾处理对小麦籽粒灌浆及氮素再运移的影响.结果表明,在高产栽培条件下,花后无调控处理(对照)的小麦籽粒产量为8.7 t/hm2.即使在高产条件,花后营养调控仍增加籽粒产量,其中花后4次氮肥、一次氮肥处理和花后喷施磷酸二氢钾分别较对照处理提高产量9.9％,8.9％和11.6％.与对照相比,花后营养调控增加了后期干物质与养分积累,促进花前干物质与养分的再转移,增加小麦千粒重,最终提高小麦籽粒产量.综合以上结果,在高产超高产条件,冬小麦花后的氮素管理有利于保证氮素充分供应,结合喷施磷酸二氢钾有助于延缓花后胁迫导致的早衰,改善灌浆过程,可以明显增加小麦籽粒产量.
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| 关 键 词： | 营养调控 花后干物质积累 氮素吸收 氮再转移 |
| 收稿时间： | 2012/4/25 0:00:00 |
| 修稿时间： | 7/4/2012 12:00:00 AM |
Effect of Post-anthesis Nutrient Regulation on Dry Matter Production, Nitrogen Uptake and Nitrogen Remolilization During Grain-filling in Winter Wheat |
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| Lu Dianjun
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Chen Xinping
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Zhang Fusuo
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Cui Zhenling
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He Mingrong
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Wang Zhenlin.Effect of Post-anthesis Nutrient Regulation on Dry Matter Production, Nitrogen Uptake and Nitrogen Remolilization During Grain-filling in Winter Wheat[J].Chinese Agricultural Science Bulletin,2013,29(9):57-60. |
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| Authors: | Lu Dianjun Chen Xinping Zhang Fusuo Cui Zhenling He Mingrong Wang Zhenlin |
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| Abstract: | Post-anthesis nutrient regulation has been regarded as a promising way to delay premature senescence and increase kernel size in agronomic practices. In order to determine the effect of post-anthesis different nutrient regulation strategies on both dry matter production and N translocation for high yielding winter wheat, in addition to providing the theoretical support on post-anthesis nutrient regulation for high yielding winter wheat, we conducted a research in field involving post-anthesis once N fertilizer, fourth N fertilizer, spraying K2PO4 to investigate effect of the each treatment on grain-filling and remobilization of N. Under favorable high yield conditions, control (without inputs of N) attained 8.7 t/hm2. Even though under high yield conditions, post-anthesis nutrient regulation raised yield (once N fertilizer 8.9%, fourth N fertilizer 9.9%, spraying K2PO4 11.6%) in comparison with control. Compared with control, post-anthesis nutrient regulation not only increased post-anthesis dry matter and N uptake, but also promoted remolibition of assimilate and N stored in vegetative tissues. Consequently, it was proposed that, assuring the adequate N situation in combination with spraying K2PO4 could mitigate earliness induced by stress and improve the grain filling process. |
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| Keywords: | N remobilization |
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