| ~(137)Cs示踪技术在黑土区农业非点源污染负荷研究中的应用 |
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| 引用本文： | 杨育红,阎百兴,沈波,曹会聪.~(137)Cs示踪技术在黑土区农业非点源污染负荷研究中的应用[J].地理科学,2010(1). |
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| 作者姓名： | 杨育红 阎百兴 沈波 曹会聪 |
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| 作者单位： | 中国科学院东北地理与农业生态研究所;华北水利水电学院;水利部松辽水利委员会; |
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| 基金项目： | 国家重点基础研究发展计划项目(2007CB407205);;中国科学院知识创新工程重大项目(KSCX1-YW-09-13)资助 |
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| 摘 要： | 利用137Cs核素示踪和定位监测相结合,研究松嫩平原黑土区3个旱作坡面土壤的流失厚度和流失速率,坡面土壤流失厚度1.20～5.25mm/a,侵蚀强度1355.0～7558.2t/(km2.a);近40a来,松嫩平原黑土区年均入河(湖)农业非点源污染负荷分别为TN1.43t/(km2.a)、NH3-N15.01kg/(km2.a)、NO3-N8.51kg/(km2.a)TP0.42t/(km2.a)、PO43-P1.85kg/(km2.a);土壤流失氮以有机氮为主;水溶态无机氮占总氮的0.51%,水溶性磷酸盐磷占总磷的0.12%。黑土区农业非点源污染物的输出和水土流失密切相关,深入研究其输移机理及防治措施具有重要的环境意义。
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| 关 键 词： | ~（137）Cs 氮 磷 坡耕地 土壤侵蚀 |
Agricultural Nonpoint Source Pollution Loads Prediction Using Caesium-137 Tracing Technique in Black Soil Region,Northeast China |
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| YANG Yu-hong,YAN Bai-xing,SHEN Bo,CAO Hui-cong.Agricultural Nonpoint Source Pollution Loads Prediction Using Caesium-137 Tracing Technique in Black Soil Region,Northeast China[J].Scientia Geographica Sinica,2010(1). |
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| Authors: | YANG Yu-hong YAN Bai-xing SHEN Bo CAO Hui-cong |
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| Institution: | 1.Northeast Institute of Geography and Agroecology;Chinese Academy of Sciences;Changchun;Jilin 130012;2.North China University of Water Resources and Electric Power;Zhengzhou;Henan 450011;3.Songliao Water Resources Commission;Ministry of Water Resources;Jilin 130021 |
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| Abstract: | The Songnen Plain in Northeast China is an important base of cash grain and soybean in China.Nonpoint source nutrient loads (TN,TP,NH3-N,NO3--N,PO43--P) to the water bodies were estimated using 137Cs nuclear tracing technique and field monitoring method.The annual mean erosion thickness of black soil in the typical slops is within 0.120-0.525 cm,and the erosion intensity is 1355.0-7558.2 t/km2 in last 40 years.The annual mean values of pollution loads per square kilometer were TN 1.43 t,NH3-N 15.01 t,NO3--N... |
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| Keywords: | caesium-137 nitrogen phosphorus slope land soil erosion |
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