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| 利用137Cs示踪农业耕作土壤侵蚀速率的定量模型 | |
| 引用本文： | 杨浩,杜明远,赵其国,阳捷行,八田珠郎.利用137Cs示踪农业耕作土壤侵蚀速率的定量模型[J].土壤学报,2000,37(3):296-305. |
| 作者姓名： | 杨浩 杜明远 赵其国 阳捷行 八田珠郎 |
| 作者单位： | 1. 中国科学院南京土壤研究所,南京,210008;日本农水省国际农林水产业研究中心,筑波3058686 2. 日本农水省农业环境技术研究所,筑波3058604 3. 中国科学院南京土壤研究所,南京,210008 4. 日本农水省国际农林水产业研究中心,筑波3058686 |
| 基金项目： | 日本农林水产省基金，中国科学院试验站基金，中国科学院院长基金 |
| 摘 要： | 建立了一个根据农业耕作土壤剖面中^137Cs的损失量与土壤侵蚀量之间关系的定量模型，在假设^137Cs在耕层中得到充分的混合而变得均一的基础上，根据质量平衡模型推导而成，模型显示^137Cs的衰变常数，年沉降分量，耕层厚和采样年份对年平均土壤侵蚀速率都有重大影响，模型结果还说明，^137Cs的损失量与年平均土壤侵蚀量之间的关系既非线性关系亦非指数关系，而是一种复杂的曲线关系。 |
| 关 键 词： | 铯－137 土壤侵蚀速率 定量模型 农业耕作土壤 |
| 收稿时间： | 1999/4/11 0:00:00 |
| 修稿时间： | 1/5/2000 12:00:00 AM |
QUANTITATIVE MODEL TO ESTIMATE SOIL EROSION RATES USING CAESIUM-137 FOR CULTIVATED SOIL |
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| Yang Hao,DU Ming-yuan,Zhao Qi-guo,Minami Katsuyuki and Hatta Tamao.QUANTITATIVE MODEL TO ESTIMATE SOIL EROSION RATES USING CAESIUM-137 FOR CULTIVATED SOIL[J].Acta Pedologica Sinica,2000,37(3):296-305. | |
| Authors: | Yang Hao DU Ming-yuan Zhao Qi-guo Minami Katsuyuki and Hatta Tamao |
| Institution: | Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008;Japan International Research Center for Agricultural Sciences, Tsukuba 3058686;National Institute of Agro-Environmental Sciences of Japan, Tsukuba 3058604;Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008;National Institute of Agro-Environmental Sciences of Japan, Tsukuba 3058604;Japan International Research Center for Agricultural Sciences, Tsukuba 3058686 |
| Abstract: | According to mass balance model and the assumption that ceasium-137 in plowed soils shows a uniform distribution through the plow layer, a quantitative model was developed to relate the amount of caesium-137 loss from the cultivated soil profile to rate of soil erosion. The model shows the facts that the radioactive decay of 137Cs, 137Cs input fraction, the depth of, plowed layer and sampling year have a great influence upon cultivated soil loss from soil profile. The result of model proves that the relationship between the rate of soil loss and 137Cs depletion is neither linear nor logarithmic. |
| Keywords: | Caesium-137(137Cs) Rate of soil erosion Quantitative model Cultivated soil |
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