| 中国亚热带土壤可蚀性K值预测的不确定性研究 |
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| 引用本文： | 张文太,于东升,史学正,张向炎,王洪杰,顾祝军.中国亚热带土壤可蚀性K值预测的不确定性研究[J].土壤学报,2009,46(2):185-191. |
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| 作者姓名： | 张文太 于东升 史学正 张向炎 王洪杰 顾祝军 |
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| 作者单位： | 1. 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京,210008;中国科学院研究生院,北京,100049
2. 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京,210008 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，国家自然科学基金 |
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| 摘 要： | 土壤可蚀性K值是土壤侵蚀模型(如USLE和RUSLE)的必要参数,直接套用经验模型估算土壤可蚀性K值会给土壤侵蚀预报带来不可估计的误差。本文以我国亚热带7种典型土壤可蚀性K值的观测值为依据,选用平均绝对误差(MAE)、平均相对误差(MRE)、均方根误差(RMSE)和精度因子(Af)四种数学统计项为指标,评价了诺谟图模型、修正诺谟图模型、EPIC模型、几何平均粒径模型和Torri模型等5种土壤可蚀性K值预测模型的不确定性。结果表明,5种模型的不确定性从小到大的顺序为:Torri模型<修正诺谟图模型和诺谟图模型
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| 关 键 词： | 土壤可蚀性K值 预测模型 不确定性 |
Uncertainty in prediction of soil erodibility K-factor in subtropical China |
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| Zhang Wentai,Yu Dongsheng,Shi Xuezheng,Zhang Xiangyan,Wang Hongjie and Gu Zhujun.Uncertainty in prediction of soil erodibility K-factor in subtropical China[J].Acta Pedologica Sinica,2009,46(2):185-191. |
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| Authors: | Zhang Wentai Yu Dongsheng Shi Xuezheng Zhang Xiangyan Wang Hongjie and Gu Zhujun |
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| Institution: | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences; Graduate School of the Chinese Academy of Sciences;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences; Graduate School of the Chinese Academy of Sciences;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences; Graduate School of the Chinese Academy of Sciences;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences; Graduate School of the Chinese Academy of Sciences |
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| Abstract: | |
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| Keywords: | Soil erodibility K-factor Prediction models Uncertainty |
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