[1]焦峰,温仲明,安韶山.基于属性识别模型的退耕地土壤水分综合评价[J].水土保持研究,2010,17(04):52-56.
　JIAO Feng,WEN Zhong-Ming,AN Shao-shan.Comprehensive Evaluation of Soil Moisture of Abandoned Cropland Based on Attribute Recognition Model[J].Research of Soil and Water Conservation,2010,17(04):52-56.
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基于属性识别模型的退耕地土壤水分综合评价

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 17 期数: 2010年04期 页码: 52-56 栏目: 出版日期: 2010-08-20
Title:
Comprehensive Evaluation of Soil Moisture of Abandoned Cropland Based on Attribute Recognition Model
作者:
焦峰1,2, 温仲明1,2, 安韶山1,2
1. 西北农林科技大学 水土保持研究所, 陕西 杨陵 712100;
2. 中国科学院 水利部 水土保持研究所, 陕西 杨陵 712100
Author(s):
JIAO Feng1,2, WEN Zhong-Ming1,2, AN Shao-shan1,2
1. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China
关键词:
属性识别模型; 退耕地; 熵权; 土壤水分; 综合评价
Keywords:
attribute recognition model; abandoned cropland; the entropy weight; soil fertility; comprehensive evaluation
分类号:
S152.7
摘要:
运用基于熵权的属性识别模型，对延河流域不同退耕年限土壤水分进行综合评价。结果表明：从不同退耕年限土壤水分的变异趋势来看，受耕作和施肥影响，退耕初期，土壤水分含量相对较高，随着退耕年限的延长，土壤水分总体呈下降趋势，表层的土壤水分比深层的土壤水分更快地损失了，土壤水分变异系数随着土层深度的增加呈减小趋势；随着退耕年限的增加，各土层土壤水分指标权重变化程度有很大差别，变异程度相当的土层之间土壤水分权重大小会随着退耕年限的变化发生反转。不同退耕年限土壤水分属性测度值均未达到速效水平，大部分处于难效水平。说明研究区土壤水分贫乏，有必要提高该地区的土壤水分水平。属性识别模型评价方法在很大程度上减小了主观因素的影响，评价结果直观实用，能为土壤水分综合评价提供有力的技术支撑。
Abstract:
Atribute recognition model based on entropy weight was used to evaluate the soil moisture of abandoned cropland of different years in Yanhe Watershed.The results showed that from trend of variation of soil moisture abandoned cropland of different years,by the farming and fertilizer effects in the early farmland,content of soil moisture was higher relatively.With prolonged,in overall,soil moisture was downward trend,and soil moisture in toplayer lost more quickly than that in deep layers.The coefficient variation of soil moisture was reduced trend with increase of soil depth.The powers of soil moisture in considerable degree of between soil layers could be reversed with the length of abandoned cropland.In general,the soil moisture of abandoned cropland is at lower level in Yanhe Watershed,it is necessary to improve soil moisture in this region.The method of attribute recognition model can reduce the impact of subjective factors to large extent.This method of results which are visual and practical can provide powerful technical support for comprehensive evaluation of soil moisture.

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备注/Memo

收稿日期:2010-4-8;
基金项目:中科院“西部之光”项目（2009y236）;国家自然基金（40871246）;西北农林科技大学“青年学术骨干支持计划”
作者简介:焦峰（1967- ），男，汉族，陕西省三原县人，博士，副研究员，主要从事GIS应用、水土保持与环境效应监测评价研究。E-mail：Jiaof11@126.com

更新日期/Last Update: 1900-01-01