黄土区冻融期不同土地利用土壤水分与温度的关系

doi:10.13866/j.azr.2020.03.10

摘要/Abstract

摘要： 为了研究冻融期土壤水分与温度的变化及其关系，通过监测野外不同土地利用径流小区土壤水分与温度数据，分析了不同深度土层土壤水分和温度的时空变化规律，阐明了研究区土壤水分与温度的相关关系。结果表明：冻融期，坡耕地20cm土层含水率变幅最大，草地和林地均为40cm土层含水率变幅最大；坡耕地20cm土层含水率变异程度最大，而草地和林地的最强活跃层分别为：30cm和10cm ；草地最先进入冻结期和融解期，且冻结和融解时间逐层滞后；3种地类(坡耕地、林地、草地）土壤含水率与温度均呈二次函数关系。林地土壤水分与温度的相关性最强，更有利于黄土区土壤水-热保持，该结果可为黄土区土壤水分对植被恢复影响研究以及环境建设保护提供科学依据。

关键词: 冻融期, 土地利用, 土壤水分, 土壤温度, 相关关系, 安塞县

Abstract: To study the changes in soil moisture and temperature during a freezing-thawing period ,the space-time change law of soil moisture and temperature of different soil depth layers were analyzed by monitoring the soil moisture and temperature data of different land use runoff plots in the field. The relationship between soil moisture and temperature in the study area was then clarified. The results showed that the variation degree of the 20 cm soil layer in sloped farmland was the largest,while the strongest active layers in the grassland and woodland were 30 cm and 10 cm,respectively. The 20 cm soil layer in the sloped farmland had the largest dispersion of water content,while the active layers in grassland and forestland were 30 cm and 10 cm,respectively. The grassland first entered the freezing period and the thawing period,and freeze and melt time lags layer by layer,and the soil moisture content and temperature of the three land types followed quadratic functions. The hydrothermal relationship of the soil in forestland was the strongest,which is more conducive to the soil water-heat retention in the loess area. This study provides a scientific basis for the research of soil moisture on vegetation restoration and the protection of the environment from construction in the loess area.

Key words: freezing-thawing period, land use, soil moisture, soil temperature, correlation, Ansai County

吴芹芹, 莫淑红, 程圣东, 李鹏, 李占斌. 黄土区冻融期不同土地利用土壤水分与温度的关系[J]. 干旱区研究, 2020, 37(3): 627-.

WU Qinqin, MO Shuhong, CHENG Shengdong, LI Peng, LI Zhanbin. Study on the correlation between soil moisture and temperature of different land uses in the loess area during a freezing-thawing period[J]. Arid Zone Research, 2020, 37(3): 627-.

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