| 太湖地区麦季协调农学、环境和经济效益的推荐施肥量 |
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| 引用本文： | 夏永秋,颜晓元.太湖地区麦季协调农学、环境和经济效益的推荐施肥量[J].土壤学报,2011,48(6):1210-1218. |
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| 作者姓名： | 夏永秋 颜晓元 |
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| 作者单位： | 中国科学院南京土壤研究所,南京,210008 |
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| 基金项目： | 中国科学院知识创新工程项目（KZCX2-YW-440）,江苏省自然科学基金项目（BK2010609） |
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| 摘 要： | 基于氮肥用量与各种氮素去向关系的实验数据,构建了太湖地区麦季协调农学、环境和经济效益的氮素连锁效应评价模型。研究表明太湖地区麦季推荐施氮量为205 kg hm-2,最大净收益为2 621元hm-2。此时产量收益为3 722元hm-2,环境总损失为1 101元hm-2,其分量大小依次为酸雨效应损失、温室效应损失、富营养化效应损失。若田块之间净经济收益变动10元hm-2,区域平均施氮量变动于193～218kg hm-2之间。与传统施氮量相比,本研究推荐施氮量能减少施氮10%～40%,净经济效益提高5%～15%。该方法不仅能综合考虑氮肥的农学、环境和经济效应,能为其他地区或作物的生态农业提供参考,估算的区域推荐施肥量也易于决策者和农民采用。
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| 关 键 词： | 推荐施肥量 协调农学、环境与经济效益 模型 最大净收益 太湖地区 |
| 收稿时间： | 7/12/2010 5:59:15 PM |
| 修稿时间： | 1/6/2011 4:23:37 PM |
Nitrogen fertilization rate recommendation integrating agronomic, environmental, and economic benefits for wheat season in Taihu Lake region |
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| xiayongqiu and yanxiaoyuan.Nitrogen fertilization rate recommendation integrating agronomic, environmental, and economic benefits for wheat season in Taihu Lake region[J].Acta Pedologica Sinica,2011,48(6):1210-1218. |
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| Authors: | xiayongqiu and yanxiaoyuan |
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| Institution: | Institude of Soil Science, Chinses Academy of China |
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| Abstract: | Excessive nitrogen(N) fertilization in wheat season in the Taihu Lake region has resulted in serious environmental problems.Previous studies have recommended optimum N fertilization rate.However,so far no holistic evaluation has been made of environmental impacts of N fertilizer.Therefore,based on experiments on fates of various N fractions in relation to N application rate in the region,an evaluation model for knock-on effect of N was developed,integrating agronomic,environmental,and economic benefits in w... |
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| Keywords: | Recommendations for nitrogen application harmonized agronomic environmental and economic benefits Model Maximum net benefit Taihu Lake region |
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