| 包衣尿素在田间的溶出特征和对夏玉米产量及氮肥利用率影响的研究 |
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| 引用本文： | 徐秋明,曹兵,牛长青,付铁梅. 包衣尿素在田间的溶出特征和对夏玉米产量及氮肥利用率影响的研究[J]. 土壤通报, 2005, 36(3): 357-359 |
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| 作者姓名： | 徐秋明 曹兵 牛长青 付铁梅 |
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| 作者单位： | 1. 北京市农林科学院,营资所,北京,100089
2. 北京市房山区农科所,北京,100115 |
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| 基金项目： | 国家高技术研究发展计划(863计划)资助(2001AA246023) |
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| 摘 要： | 通过田间试验研究了控释包衣尿素在田间的实际溶出过程及其对玉米产量、氮肥利用率的影响。结果表明,控释包衣尿素在田间的实际溶出期限远远高于实验室的测定值,控释包衣尿素处理耕层土壤无机氮动态过程与其溶出特征比较一致;在减少20%氮肥用量并且采用玉米全生育期一次性基施的措施下,控释包衣尿素的玉米产量和吸氮量与常规施肥措施的尿素持平,而氮肥利用率略有提高。
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| 关 键 词： | 包衣尿素 玉米 氮肥利用率 |
| 文章编号： | 0564-3945(2005)03-0357-03 |
| 修稿时间： | 2004-01-24 |
Nutrient Release Characteristics of Coated Urea under Field Condition and Inf1uence on Summer Cornls Yield and Nitrogen Utilization Efficiency |
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| XU Qiu-ming,Cao Bing,NIU CHNC"-QINC,FU Tie-mei. Nutrient Release Characteristics of Coated Urea under Field Condition and Inf1uence on Summer Cornls Yield and Nitrogen Utilization Efficiency[J]. Chinese Journal of Soil Science, 2005, 36(3): 357-359 |
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| Authors: | XU Qiu-ming,Cao Bing,NIU CHNC" -QINC,FU Tie-mei |
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| Affiliation: | XU Qiu-ming,Cao Bing,NIU CHNC"2-QINC2,FU Tie-mei |
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| Abstract: | Field experiments were conducted to investigate the course of nutrient release under fieldcondition,and effect of coated urea on summer corn yield and nitrogen utilization efficiency.The results showed that the nutrient release duration of coated urea was much longer than that of laboratory method which was the common procedure to determine release type and duration of coated fertilizers,and mineral nitrogen content course of plough layer was in accordance with nutrient release of coated urea under field condition.Single basal application of coated urea with 20% reduction of nitrogen application rate was comparable to urea with conventional fertilization measurement in terms of summer corn yield and nitrogen absorption,while nitrogen utilization efficiency was higher. |
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| Keywords: | Coated urea Summer corn Nitrogen utilization efficiency |
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