本文選題：土壤干燥化　切入點：黃土高原　出處：《水科學進展》2017年03期

【摘要】：為掌握黃土高原土壤干燥化程度的空間分布特征,定量評價雨季前、后土壤干燥化程度,于2013年在黃土高原南北方向布設一條樣帶(N=86),獲取雨季前、后0~5 m剖面土壤含水量。采用地統(tǒng)計學方法分析了土壤干燥化指數的空間分布規(guī)律及變異特征。結果表明:在黃土高原地區(qū),土壤干燥化程度存在明顯的緯度地帶性,且雨季前土壤干燥化指數的空間變異程度高于雨季后;經過雨季降水的補給,土壤干層在一定程度上得到修復,且中部地區(qū)的修復效果明顯優(yōu)于南部及北部地區(qū);土壤干燥化指數剖面分布特征在雨季前、后的差異主要表現在淺層0~2.3 m土層,這主要歸因于降水對淺層土壤水分的補給。
[Abstract]:In order to understand the spatial distribution characteristics of soil drying degree in Loess Plateau, and to evaluate quantitatively the degree of soil drying before and after the rainy season, a transect was set up in the north and south of the Loess Plateau in 2013 to obtain the soil moisture content in the 0 ~ 5 m profile before and after the rainy season.The spatial distribution and variation characteristics of soil drying index were analyzed by geostatistics.The results show that in the Loess Plateau, the degree of soil dryness has obvious latitude zonation, and the spatial variation of soil drying index before rainy season is higher than that after rainy season.The dry layer of soil was repaired to some extent, and the effect of soil dryness index in the central region was obviously better than that in the southern and northern regions, and the distribution characteristics of soil dryness index profile were mainly shown in the shallow layer of 0.2.3 m soil layer before the rainy season.This is mainly due to the recharge of precipitation to shallow soil moisture.
【作者單位】： 西北農林科技大學資源環(huán)境學院;中國科學院地理科學與資源研究所生態(tài)系統(tǒng)網絡觀測與模擬重點實驗室;西北農林科技大學黃土高原土壤侵蝕與旱地農業(yè)國家重點實驗室;
【基金】：國家自然科學基金資助項目(41530854;41501233)~~
【分類號】：S152.7

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