文章摘要
王宁, 毕华兴, 孔凌霄, 侯贵荣, 崔艳红, 周巧稚, 常译方.晋西黄土区不同密度刺槐林地土壤水分补偿特征[J].水土保持学报,2019,33(4):255~262
晋西黄土区不同密度刺槐林地土壤水分补偿特征
Soil Water Compensation Characteristics of Robinia pseudoacacia Forestlands with Different Densities in the Loess Region of Western Shanxi Province
投稿时间:2019-01-14  
DOI:10.13870/j.cnki.stbcxb.2019.04.036
中文关键词: 晋西黄土区  刺槐  土壤水分补偿度  降雨
英文关键词: loess region of western Shanxi Province  Robinia pseudoacacia  compensation degree of soil water  rainfall
基金项目:国家重点研发计划项目"黄土残塬沟壑区水土保持型景观优化与特色林产业技术及示范"(2016YFC0501704);2019校专项"科技创新服务能力建设—科研基地建设—林果业生态环境功能提升协同创新中心"(2011协同创新中心)(PXM2019_014207_000099)
作者单位E-mail
王宁1, 毕华兴1,2,3,4,5,6, 孔凌霄1, 侯贵荣1, 崔艳红1, 周巧稚1, 常译方1 1. 北京林业大学水土保持学院, 北京 100083

2. 山西吉县森林生态系统国家野外科学观测研究站
, 山西 吉县 042200

3. 北京林果业生态环境功能提升协同创新中心
, 北京 102206

4. 水土保持国家林业局重点实验室(北京林业大学)
, 北京 100083

5. 北京市水土保持工程技术研究中心(北京林业大学)
, 北京 100083

6. 林业生态工程教育部工程研究中心(北京林业大学)
, 北京 100083 
bhx@bjfu.edu.cn 
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中文摘要:
      为研究晋西黄土区不同密度刺槐人工林对土壤水分的影响,分别选取2 400株/hm2与1 300株/hm2刺槐人工林代表研究区高、低密度刺槐林分,以裸地为对照,分别利用Enviro-SMART土壤水分定位监测系统和翻斗式自记雨量计对0—150 cm深度范围内各土层体积含水量与林外降雨进行定位观测。结果表明:(1)从不同降水年份来看,在干旱年和平水年,低密度刺槐生长季平均土壤储水量高于高密度刺槐,在研究年份中,低密度刺槐多年平均土壤储水量比高密度刺槐多年平均土壤储水量高6.80 mm。(2)在土壤剖面垂直方向,干旱年、平水年高密度刺槐对0—30 cm土层土壤水分的消耗高于低密度刺槐,丰水年0—30 cm土层土壤水分消耗各刺槐林间差异不显著(P>0.05)。(3)综合分析降雨入渗深度、入渗量及雨季土壤水分补偿度等指标,研究区天然降雨可对低密度刺槐林分生长所消耗的土壤水分进行有效补充,不会出现人们所担心的黄土高原在植被恢复过程中会造成水分的不足而导致新的生态退化。但考虑到高密度刺槐林对土壤水分的消耗,建议在研究区进行刺槐林植被建设过程中多考虑采用低密度刺槐林的配置方式。
英文摘要:
      In order to study the effects of Robinia pseudoacacia forestlands with different densities on soil moisture in the loess region of Western Shanxi Province, the R. pseudoacacia forestlands with densities of 2 400 per hacter and 1 300 per hacter were selected to represent the high and low density R. pseudoacacia forestlands in the study area respectively, and the bare land as a control. The soil water content in 0-150 cm range and precipitation outside the forest were carried out by using Enviro-SMART soil moisture positioning monitoring system and self-recording dump rain gauge. The results showed that:(1) In different precipitation years, the average soil water storage of low-density R. pseudoacacia forestland was higher than that of high-density R. pseudoacacia forestland in drought and normal years. In these years, the absolute value of annual average soil water storage of low-density R. pseudoacacia forestland was 6.80 mm higher than that of high-density R. pseudoacacia forestland. (2) In the vertical direction of soil profile, the water consumption of 0-30 cm soil layer by high-density R. pseudoacacia forestland was higher than that of low-density R. pseudoacacia forestland in drought and normal years, and there was no significant difference in soil moisture consumption between these two kinds of R. pseudoacacia forestlands in wet years(P>0.05). (3) Comprehensive analysis of rainfall infiltration depth, infiltration amount and compensation degree of soil moisture in rainy season, natural rainfall in the study area could effectively supplement the soil moisture consumed by low-density R. pseudoacacia stand growth, and there was no new ecological degradation caused by water shortage in the process of vegetation restoration in the Loess Plateau. However, considering the consumption of soil moisture by high density R. pseudoacacia forestland, it was suggested that low density R. pseudoacacia forestland should be popularized in vegetation construction in the study area.
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