| 充足底墒播后不灌水时肥料和播期组合对小麦生长和耗水的影响 |
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| 引用本文： | 薛绪掌,王志敏,秦勇.充足底墒播后不灌水时肥料和播期组合对小麦生长和耗水的影响[J].干旱地区农业研究,2003,21(4):78-83. |
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| 作者姓名： | 薛绪掌 王志敏 秦勇 |
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| 作者单位： | 1. 国家农业信息化工程技术研究中心,北京,100089
2. 中国农业大学作物学院,北京,100094 |
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| 基金项目： | 北京市新星计划(H020821340130) |
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| 摘 要： | 在充足底墒播后不灌水条件下,进行了适当晚播(10月15日播)与超晚播条件下的小麦肥料试验。主要结果为:(1)播后不灌水条件下超晚播减产严重,主要是单位面积总粒数下降太多,通过适当提高穗密度难以补偿;(2)高施磷条件下(施磷二铵450kg/hm2),随施氮量的增加,开花前的耗水量没有增加,而灌浆期的耗水量则随氮肥用量增加而增加;(3)控制花前无效生长,降低花前耗水,优化开花后的群体结构,提高灌浆期的灌浆强度是降低总耗水、提高水分利用效率的基本途径。
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| 关 键 词： | 施肥 播期 节水 冬小麦 |
| 文章编号： | 1000-7601(2003)04-0078-06 |
| 修稿时间： | 2003年3月25日 |
Influence of fertilization and sowing date on growth and water consumption of winter wheat with no irrigation after sowing |
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| Abstract: | Under the condition of sufficient soil moisture content before sowing and no irrigation after sowing, the effect of fertilization on winter wheat was studied with 2 planting dates of Oct. 15 and Nov. 1. The main conclusions are: (1) When there is no irrigation after planting, yield reduction due to late planting is significant because of sharp reduction of total grain number in unit area; (2) When phosphate fertilization is adequate, water consumption is stable before flowering and increased during filling stage with the increase of amount of N fertilization; (3) The main principle for improvement of WUE is control of water consumption by depressing depression of trivial growth before flowering and improving grain filling ear number in unit area. |
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| Keywords: | fertilization sowing date water-saving conservation winter wheat |
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