Effects of Nitrogen Application on Nitrogen Use Efficiency of Spring Maize and Distribution of Soil Nitrate Nitrogen in Northwest Hebei Province

WANG ji-qing; LIU She-ping; HAN Bao-wen

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Effects of Nitrogen Application on Nitrogen Use Efficiency of Spring Maize and Distribution of Soil Nitrate Nitrogen in Northwest Hebei Province

更新时间：2024-11-07

- Effects of Nitrogen Application on Nitrogen Use Efficiency of Spring Maize and Distribution of Soil Nitrate Nitrogen in Northwest Hebei Province
- Vol. 25, Issue 2, (2011)
- 作者机构：
  
  河北北方学院农林科技学院,河北,张家口,0750002. 河北省农林科学院农业资源环境研究所,河北,石家庄,050051
- 作者简介：
- 基金信息：
- DOI：
  CLC： S147.22S158.3
- Published：2011
- 稿件说明：
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WANG ji-qing, LIU She-ping, HAN Bao-wen. Effects of Nitrogen Application on Nitrogen Use Efficiency of Spring Maize and Distribution of Soil Nitrate Nitrogen in Northwest Hebei Province[J]. 2011, 25(2).
DOI：

WANG ji-qing, LIU She-ping, HAN Bao-wen. Effects of Nitrogen Application on Nitrogen Use Efficiency of Spring Maize and Distribution of Soil Nitrate Nitrogen in Northwest Hebei Province[J]. 2011, 25(2). DOI：

摘要

在田间条件下研究了施氮量对春玉米产量、氮肥利用率和土壤硝态氮时空分布的影响

旨在为冀西北春玉米氮肥优化管理提供理论依据。研究结果表明

春玉米产量随施氮量的增加而提高

当施氮量高于225 kg/hm2时

春玉米产量和氮肥利用率显著降低。从春玉米播种前到收获后

不施氮处理0-90 cm各土层硝态氮含量不断降低

施氮处理0-30 cm和30-60 cm土层硝态氮含量呈先上升后迅速下降并保持稳定的趋势

而60-90 cm土层硝态氮在春玉米生长后期有增加的趋势;春玉米收获后随着土层深度的增加

硝态氮呈波浪式下降

施氮量300

375 kg/hm2处理60-90

120-150

150-180 cm土层硝态氮含量显著高于其它处理。随着施氮量的增加

春玉米0-90

90-180

0-180 cm土层硝态氮累积量均呈增加趋势

高施氮量土层累积的硝态氮存在着更大的淋溶风险。因此

综合分析氮肥用量对春玉米产量、氮肥利用率的影响

并考虑土壤硝态氮时空分布下的环境风险

合理的施氮量应控制在195~225 kg/hm2之间。

Abstract

Field experiment was carried out to investigate effects of different nitrogen application rates on yield

nitrogen use efficiency of spring maize and distribution of soil nitrate nitrogen(NO-3-N) in Northwest Hebei province.The results showed that yield of spring maize increased with the increasement of N application rate

and yield

N use efficiency of spring maize decreased significantly when N application rate was higher than 225 kg/hm2.From before sowing to after harvest of spring maize

NO-3-N content in 0...

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