文献类型：期刊文献

中文题名：基于熵技术的半干旱地区土壤水分差异性分析

英文题名：Difference of Soil Moisture Content in Semiarid Area Based on Entropy Technology

作者：焦金鱼[1];贵立德[2];贾国江[1]

第一作者：焦金鱼

机构：[1]定西师范高等专科学校地理系,甘肃定西743000;[2]定西市水土保持科学研究所,甘肃定西743000

第一机构：甘肃中医药大学定西校区

年份：2014

卷号：31

期号：5

起止页码：826

中文期刊名：干旱区研究

外文期刊名：Arid Zone Research

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：甘肃省教育厅科研项目"陇中半干旱黄土丘陵沟壑区流域生态经济可持续发展研究"(1127B-01)

语种：中文

中文关键词：土壤水分;信息熵效用价值;安家坡流域;甘肃

外文关键词：soil moisture content; utility value of information entropy; Anjiapo Watershed; Gansu Province

摘要：在安家坡流域6 a实测土壤水分数据的基础上,运用熵技术分析法,对农地、苜蓿、沙棘、荒坡4种不同土地利用下的土壤水分时空变异规律进行了分析。结果显示:土壤水分信息熵效用价值均体现自上而下不断减少的规律,浅层土壤水分信息熵效用价值最大;不同植被覆盖形式下土壤水分信息熵效用价值体现为:荒坡>沙棘>农地>苜蓿,并在60 cm和80 cm深处出现2个土壤水分信息熵增减的突变点;除沙棘灌丛外,7—8月土壤水分环境内部信息熵剧增,信息熵效用价值最低,土壤热容量急剧减少,从而影响到植物的正常生长。
Based on the data of soil moisture content in the Anjiapo Watershed in recent 6 years, the entropy technology was used to analyze the spatiotemporal variation of soil moisture content under four different land use types including farmland, alfalfa land, Hippophae rhamnoides land and barren slope land. The result showed that tile information entropy value of soil moisture content was decreased from topsoil to deeper soil layer, and it was the highest in shallow soil layer. Under different vegetation types, the information entropy value of soil moisture content was in an order of barren slope land 〉 Hippophae rhamnoides land 〉 farmland 〉 alfalfa land, and two abrupt change points occurred at soil depths of 60 cm and 80 cm. The information entropy of soil moisture content was sharply increased in July and August except in Hippophae rhamnoides land, the utility value of information entropy was the lowest, and the soil heat capacity was sharply reduced, thus the growth of vegetation was impacted.