Ma Yu-Lei, Wang De, Liu Jun-Min, Wen Xiao-Hu, Gao Meng, Shao Hong-Bo
College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China.
Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, Shandong, China.
Ying Yong Sheng Tai Xue Bao. 2013 Sep;24(9):2423-30.
Soil salinity and groundwater depth are the two important factors affecting the vegetation growth and distribution in the Yellow River Delta. Through field investigation and statistical analysis, this paper studied the relationships between the typical vegetations (Suaeda heteroptera-Tamarix chinensis, Robinia pseudoacacia, Phragmites australis, and cotton) , soil salinity, and groundwater depth in the Delta. In the study area, groundwater depth had significant effects on soil salinity, with the average influence coefficient being 0.327. When the groundwater depth was 0.5-1.5 m, soil salinization was most severe. The vegetation growth in the Delta was poorer, with the NDVI in 78% of the total area being less than 0.4. Groundwater depth and soil salinity had significant effects on the vegetation distribution. Soil salinity had significant effects on the NDVI of R. pseudoacacia, S. heteroptera-T. chinensis, P. australis, and cotton, while groundwater depth had significant effects on the NDVI of S. heteroptera - T. chinensis, but lesser effects on the NDVI of P. australis, cotton and R. pseudoacacia.
土壤盐分和地下水位深度是影响黄河三角洲植被生长和分布的两个重要因素。通过实地调查和统计分析，本文研究了三角洲典型植被（翅碱蓬-柽柳、刺槐、芦苇和棉花）、土壤盐分和地下水位深度之间的关系。在研究区域，地下水位深度对土壤盐分有显著影响，平均影响系数为0.327。当地下水位深度为0.5-1.5米时，土壤盐渍化最为严重。三角洲地区植被生长较差，总面积的78%的归一化植被指数（NDVI）小于0.4。地下水位深度和土壤盐分对植被分布有显著影响。土壤盐分对刺槐、翅碱蓬-柽柳、芦苇和棉花的NDVI有显著影响，而地下水位深度对翅碱蓬-柽柳的NDVI有显著影响，但对芦苇、棉花和刺槐的NDVI影响较小。
