生态学杂志2018，Vol.37Issue(3)：823-830,8.DOI:10.13292/j.1000-4890.201803.040
半干旱草原区土壤性质对植物群落结构的影响
Effects of soil properties on plant community structure in a semi-arid grassland
摘要
Abstract
Data of vegetation and soil physicochemical properties were collected from 55 quadrats in a typical semi-arid grassland in Ewenke Tribe Autonomous Qi (Flag),Hulunbuir,eastern Inner Mongolia,China.The effects of soil physicochemical properties on the spatial distribution of vegetation community were analyzed by canonical correspondence analysis (CCA).With respect to its spatial distribution,the vegetation was slightly degraded.The degraded communities showed the characteristics of high biomass and low diversity.The transitional communities showed the characteristics of high diversity and low biomass,and the original communities showed an intermediate state.Soil physical properties,such as particle composition and bulk density,had little spatial variation.In contrast,there were substantial spatial variation in the contents of soil organic matter,total phosphorus,total nitrogen,and soil moisture.The horizontal change of plant community structure was mainly driven by soil moisture,total phosphorus,organic matter and total nitrogen contents,with soil moisture being the most important factor.The moisture of surface soil (0-20 cm) was the most important factor affecting community structure (with a contribution rate of 38％),followed by the moisture of deep soil (60-80 cm) (with a contribution rate of 36.4％).Such a result indicated that plant community structure was affected not only by shortterm precipitation but also by long-term climate.In conclusion,soil moisture was the most important factor driving the spatial variation of plant community structure in the semi-arid grassland,followed by soil organic matter,total nitrogen and total phosphorus contents.关键词
群落结构/土壤性质/CCA/有机质Key words
community structure/soil property/CCA/organic matter引用本文复制引用
傅致远,姜宏,王国强,阿膺兰,薛宝林,王红旗..半干旱草原区土壤性质对植物群落结构的影响[J].生态学杂志,2018,37(3):823-830,8.基金项目
国家自然科学基金项目(51679006、51779007)资助. （51679006、51779007）
