[1]王蕾钦,王飞,李朋飞.相似降水年组下黄土高原植被恢复与土壤水分变化过程与空间特征分析[J].水土保持研究,2017,24(06):179-185,193.
　WANG Leiqin,WANG Fei,LI Pengfei.Relationships Between Vegetation Restoration and Soil Moisture on the Loess Plateau[J].Research of Soil and Water Conservation,2017,24(06):179-185,193.
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相似降水年组下黄土高原植被恢复与土壤水分变化过程与空间特征分析

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 24 期数: 2017年06期 页码: 179-185,193 栏目: 出版日期: 2017-11-24
Title:
Relationships Between Vegetation Restoration and Soil Moisture on the Loess Plateau
作者:
王蕾钦1, 王飞1,2, 李朋飞2
1. 西北农林科技大学 资源环境学院, 陕西 杨凌 712100;
2. 中国科学院 水利部 水土保持研究所, 陕西 杨凌 712100
Author(s):
WANG Leiqin1, WANG Fei1,2, LI Pengfei2
1. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
关键词:
黄土高原; 植被恢复; 相似降水条件; 植被指数; 土壤水分指数; 遥感
Keywords:
Loess Plateau; vegetation restoration; similar precipitation condition; NDVI; SWI; remote sensing
分类号:
S152.7
摘要:
土壤水分是黄土高原植被恢复及其可持续性的主导限制因子，为认识退耕还林（草）工程以来大尺度植被恢复与土壤水分关系，以25 km×25 km格点为研究单元，采用1992-2013年逐月降水量、归一化植被指数（NDVI）和土壤水分指数（SWI）等数据，分析了该区植被恢复与土壤水变化过程及其区域分布特征。结果表明，黄土高原植被和土壤水分变化特征和趋势不一致，其中大部分区域（70%以上面积） NDVI呈极显著增加趋势（p<0.01），但绝大部分地区（94%面积）的SWI没有趋势性变化。为进一步揭示植被和土壤水分变化关系，以格点为单元提取并分析了相似年组（年降水量差小于2%，年差大于或等于5年，逐月降水量相关性大于0.55），并分析了不同相似年组内NDVI和SWI的变化特征。植被指数与土壤水分变化主要包括两类：植被指数和土壤水分同时增加与植被指数增加而土壤水分减少。黄土高原植被、土壤水分变化的区域性明显，在未来生态恢复过程中，需要进一步认识植被恢复对土壤水分的关系，促进黄土高原植被恢复的可持续性。
Abstract:
On the Loess Plateau, soil moisture is one of the major factors impacting the sustainability of vegetation restoration. In this study, we used datasets on precipitation, vegetation cover and soil moisture content to investigate the changing trends and regional variabilities of vegetation cover and soil moisture across the Loess Plateau between 1992 and 2013 at a 25 km scale. The results showed that:(1) vegetation cover for most areas of the Loess Plateau experienced a significant increasing trend, while soil moisture for majority parts of the plateau underwent an insignificant change; (2) under the similar precipitation condition, there were mainly two types of vegetation cover-soil moisture changes, which were increased vegetation coverage and soil moisture and increased vegetation coverage and decreased soil moisture. Regional variabilities of changes in vegetation cover and soil moisture were large, further studies were desirable to understand the relationship between vegetation restoration and soil moisture changes, and therefore to improve the sustainability of vegetation restoration on the Loess Plateau.

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备注/Memo

收稿日期:2017-01-05;改回日期:2017-01-19。
基金项目:中国科学院西部之光人才培养计划联合学者项目“黄土高原侵蚀坡地退耕还林草综合评价与可持续对策研究”（院[2013]165）；国家重点研发计划“黄土高原水土流失治理与生态产业协同发展技术集成与模式”（2016YFC0501707）；科技基础性工作专项黄土高原生态系统与环境变化考察课题（2014FY210120）
作者简介:王蕾钦(1989-),女,甘肃白银人,硕士研究生,研究方向:水土保持生态效益评价。E-mail:leiq@nwafu.edu.cn
通讯作者:王飞(1971-),男,陕西户县人,研究员,硕士生导师,主要研究方向:水土保持环境效应评价与流域管理。E-mail:wafe@ms.iswc.ac.cn

更新日期/Last Update: 1900-01-01