| 氮肥后移对冬小麦产量、氮肥利用率及氮素吸收的影响 |
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| 引用本文： | 陈祥,同延安,亢欢虎,俞建波,王志辉,杨江锋.氮肥后移对冬小麦产量、氮肥利用率及氮素吸收的影响[J].植物营养与肥料学报,2008,14(3):450-455. |
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| 作者姓名： | 陈祥 同延安 亢欢虎 俞建波 王志辉 杨江锋 |
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| 作者单位： | 1.西北农林科技大学资源环境学院,陕西杨凌 712100; |
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| 基金项目： | 引进国际先进农业科技计划(948计划) |
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| 摘 要： | 为改变小麦“一炮轰”施肥存在的弊端，通过两个田间试验，研究了不同氮肥后移模式对冬小麦产量、氮肥利用率及氮素吸收、累积的影响，旨在了解冬小麦对氮素吸收和转运规律，为实现冬小麦超高产和合理施肥提供依据。结果表明，与传统“一炮轰”施肥技术相比，氮肥后移可以提高冬小麦的子粒产量、穗数及氮肥利用率，以N4处理（50%作为基肥，50%返青后追施）最高，两个试验点产量分别达到3857和8240kg/hm2，增产25.8%和17.3%，穗数增加6.0%和18.1%，氮肥利用率提高111.8%和107.4%。冬小麦氮素累积主要集中在返青后期至灌浆期阶段，因此在保证基肥的条件下，返青期后追施氮肥显得尤为重要。表明在本试验条件下，比较合理的氮肥施肥模式为50%作为基肥，50%返青后追施。
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| 关 键 词： | 冬小麦 氮肥后移 产量 氮肥利用率 氮素吸收与累积 |
| 文章编号： | 1008-505X(2008)03-0450-06 |
| 收稿时间： | 2007-06-08 |
| 修稿时间： | 2007年6月8日 |
Effect of postponing N application on the yield, apparent N recovery and N absorption of winter wheat |
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| CHEN Xiang,TONG Yan-an,KANG Huan-hu,YU Jian-bo,WANG Zhi-hui,YANG Jiang-feng.Effect of postponing N application on the yield, apparent N recovery and N absorption of winter wheat[J].Plant Nutrition and Fertilizer Science,2008,14(3):450-455. |
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| Authors: | CHEN Xiang TONG Yan-an KANG Huan-hu YU Jian-bo WANG Zhi-hui YANG Jiang-feng |
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| Affiliation: | 1.College of Resource. and Environment Science.,Northwest A&F University,Yangling,Shaanxi 712100,China; |
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| Abstract: | Two field experiments were carried out to study the effect of postponing N fertilizer application on the yield, apparent N recovery and N absorption of winter wheat. The objective of this experiment was to find the pattern of N absorption and transformation, and to give a scientific suggestion for high-yield management and optimized N application of winter wheat. The results showed that postponing N fertilizer application can increase grain yield, number of spike and apparent N recovery of winter wheat, with treatment N4 (50% basal fertilizer, 50% application in stem elongation stage) having the best results. The yield of two field experiments reached 3857 and 8240 kg/hm2， increased yield by 25.8% and 17.3%, spike number by 6.0% and 18.1%, apparent N recovery by 111.8% and 107.4%, respectively. The majority of N absorption and accumulation in winter wheat took place from regreening to filling, so on the basis of basal fertilizer application, it is very important to apply N fertilizer after regreening. Based on results from this experiment, it is recommended that 50% of N fertilizer should be applied as basal fertilizer and 50% should be applied after regreening. |
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