宁夏银北林田湖草区土壤全盐含量、含水量、pH值与植物分布关系的研究  

Relationship between Soil Total Salt Content,Moisture Content,pH Value and Plant Distribution in Forests,Field,Lake and Grass Area of Northern Yinchuan of Ningxia

作　　者：祁宝霞 杨涓[1] 郑国琦[1] 韦雅素 杨玲玲 Qi Baoxia;Yang Juan;Zheng Guoqi;Wei Yasu;Yang Lingling(School of Life Sciences,Ningxia University,Yinchuan,Ningxia 750021)

机构地区：[1]宁夏大学生命科学学院,宁夏银川750021

出　　处：《宁夏农林科技》2022年第4期44-52,69,共10页Journal of Ningxia Agriculture and Forestry Science and Technology

基　　金：国家重点研发计划课题(2016YFC0501307);2019年宁夏大学生创新创业训练计划项目(X2019107490418)。

摘　　要：以宁夏银北林田湖草区植物群落为研究对象,选取贺兰山洪积扇边缘至黄河西岸区域内林地、农田及周边、湖岸及周边荒滩草原为代表样地,调查不同样地的土壤及植物种类,采用植物物种丰富度、均匀度、优势度和多样性指数进行比较和系统分析。结果表明,银北林田湖草区植物多样性与土壤含水量之间呈正相关,沙湖以北样带含水量自西向东整体高于沙湖以南,越靠近东部即越靠近黄河岸边土壤含水量越高;群落土壤的pH值表现为随土层加深而增大;沙湖以北样带土壤全盐含量自西向东高于沙湖以南,全盐含量与物种丰富度指数关系:全盐含量越高,Patrick指数越低,全盐含量越低,Patrick指数越高;Patrick指数与海拔呈显著正相关。因此,贺兰山东麓林田湖草区的土壤含水量和土壤全盐含量影响植被分布。This paper studies the plant community of the forests,field,lake and grass area of northern Yinchuan,Ningxia.Representative samples were selected from the edge of the proluvial fan at the eastern foothills of the Helan Mountains to the western bank of the Yellow River,including woodland,farmland and surrounding areas,lake shore and surrounding barren grassland;soil and plant species at each sample area were investigated.Plant species richness,evenness,dominance and diversity indices were used for comparison and systematic analysis.The results showed that there was a positive correlation between plant diversity and soil moisture content in forests field,lake and grass area of northern Yinchuan;the moisture content of the sample area to the north of the Shahu Lake was higher than that of the sample area to the south of the Shahu Lake from the west to the east,and the closer to the east(i.e.the closer to the bank of the Yellow River),the higher the soil moisture content.The pH value of the community soils showed an increase with the deepening of the soil layer.The soil salinity of the sample area to the north of the Shahu Lake was higher than that of the sample area to the south of the Shahu Lake from the west to the east.The relationship between salinity and species richness index was that the higher the salinity,the lower the Patrick index,and the lower the salinity,the higher the Patrick index;and there was a significant positive correlation between Patrick index and altitude.Therefore,the soil moisture content and total salt content in forests,field,lake and grass area in the eastern foot of Helan Mountain affect the vegetation distribution.

关 键 词：土壤全盐含量 植物分布 物种多样性指数 

分 类 号：S156.41[农业科学—土壤学]