| 拔节期重施氮肥对小麦群体质量和产量的影响 |
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| 引用本文： | 李友军,付国占,刘丰明,谷登斌,胡铁良.拔节期重施氮肥对小麦群体质量和产量的影响[J].河南科技大学学报(农学版),1997(2). |
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| 作者姓名： | 李友军 付国占 刘丰明 谷登斌 胡铁良 |
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| 作者单位： | 洛阳农业高等专科学校(李友军，付国占，刘丰明)，周口地区种子公司(谷登斌)，鲁山县种子公司(胡铁良) |
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| 摘 要： | 拔节期重施氮肥,可以显著改善群体质量,增加植株基部节间的重量、充实度和次生根条数,提高植株抗倒、抗旱能力;提高分蘖成穗率,保证稳定的成穗数;明显改善中后期光合性能,减少小穗小花退化,促进物质积累和籽粒灌浆,增加穗粒数和千粒重,具有显著提高产量的效果。但在同一密度条件下,拔节期追施氮量对小麦群体性状的改善效应和增产效果不同,均呈抛物线变化。一般情况下,拔节期追氮数量宜掌握在150～300kg/hm~2尿素范围内。
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| 关 键 词： | 小麦 拔节期 氮肥 密度 产量 |
The Effect of Heavy Application of N-fertilizer in the Jointing Period on the Population Quality and Yield of Winter Wheat |
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| Li Youjun et al.The Effect of Heavy Application of N-fertilizer in the Jointing Period on the Population Quality and Yield of Winter Wheat[J].Journal of Luoyang Agricultural College,1997(2). |
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| Authors: | Li Youjun |
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| Institution: | Li Youjun et al |
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| Abstract: | Heavy application of N-fertilizer in the jointing period could improve the plant population quality and singal plant characteristics obviously,increase the percentage of ear bearing tiller and insure appropriate ear number,improve middle and late stage photosynthet-ic characteristics obviously,increase the grain number per ear and 1000-grain weight and yield significantly. But the application number of N-fertilizer at jointing period could affect differently the plant population singal plant characteristics and yield effects at the same density. The most suitable application number of N-fertilizer at the jointing period will be 150 -300kg/hm2 urea. |
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| Keywords: | Wheat Jointing period N-fertilizer Density Yield |
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