| 天山南麓山前平原土壤盐分空间异质性对植物群落组成及结构的影响 |
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| 引用本文： | 赵振勇,王让会,尹传华,王雷.天山南麓山前平原土壤盐分空间异质性对植物群落组成及结构的影响[J].干旱区地理,2007,30(6):839-845. |
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| 作者姓名： | 赵振勇 王让会 尹传华 王雷 |
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| 作者单位： | 中国科学院新疆生态与地理研究所,新疆,乌鲁木齐,830011 |
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| 基金项目： | 国家重点基础研究发展规划项目(G1999043509)，阜康市绿洲荒漠过渡带植被恢复示范工程项目(0742141001)，中科院知识创新重要方向性项目(KZCX3-SW-327-04)资助 |
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| 摘 要： | 将轮台天山南麓山前平原中下部自北至南分为4个地貌带:洪水剥蚀带、溢出带、三角洲带及两河交汇区带。并以土壤电导作为积盐程度的指标,分析了天山南麓山前平原4个地貌带土壤盐的分布特征:溢出带和三角洲带土壤盐分含量高,两端洪水剥蚀带和两河交汇区带盐分含量低。物种多样性及物种组成分析结果表明,自北至南物种多样性及物种数量都在下降,洪水剥蚀带主要为柽柳群落、琵琶柴群落,溢出带主要为柽柳群落、盐节木群落、盐角草群落,三角洲带及两河交汇区均为柽柳群落。通过相关性分析,土壤盐分与群落物种多样性相关性不显著。但是,土壤盐渍化的变化明显影响到植物群落物种组成的变化、群落类型的空间分布和演替。
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| 关 键 词： | 天山南麓 山前平原 盐渍化 植物群落 相关分析 |
Influence of spatial heterogeneity of soil salinity on plant community structure and composition of plain at south piedmont of Tianshan Mountains |
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| ZHAO Zhen-yong,WANG Rang-hui,YIN Chuan-hua,WANG Lei.Influence of spatial heterogeneity of soil salinity on plant community structure and composition of plain at south piedmont of Tianshan Mountains[J].Arid Land Geography,2007,30(6):839-845. |
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| Authors: | ZHAO Zhen-yong WANG Rang-hui YIN Chuan-hua WANG Lei |
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| Abstract: | Shrub is a dominant vegetation type at south piedmont of the Tianshan Mountains,Luntai County.Meanwhile,it is also a relatively stable ecosystem type and plays a vital role for water and soil conservation in this region.This paper divided this region into 4 geomorphological belts:the flood erosion belt,groundwater spill belt,delta belt and the joining belt of piedmont plain and the Tarim floodplain.Meanwhile,soil salinization and community diversity in this region are reported based on filed measurements.With soil conductance as indictors of soil salinization,the different soil characteristics are plotted out in this region.Within the region from the flood erosion belt to the joining belt of piedmont plain and the Tarim floodplain,the topsoil salinity of groundwater spill belt and delta belt is high,one of the flood erosion belt and the joining belt of piedmont plain and Tarim floodplain is low.A variety of geomorphology and hydrogeology is the main cause of soil heterogeneity.The results of species diversity and composition analyses show that species diversity indices and quantity of species all decline with the transition of geomorphologic and hydro-geologic conditions from flood erosion belt to the joining belt of piedmont plain and the Tarim floodplain.These communities in sequence are as follows:Tamarix spp.community and Reaumuria soongorica community(in flood erosion belt),Tamarix spp.community,Halocnemum strobilaceum community and Salicornia europaea L.community(in groundwater spill belt),Tamarix spp.community(in delta belt),Tamarix spp.community(in the joining belt of piedmont plain and Tarim floodplain).The correlation analysis shows that relationships between the soil conductance and community diversity indices are not significant.The changes of soil salinity have a significant influence on components of plant community,as well as on the distribution of different communities and succession,especially for the halophytes species. |
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| Keywords: | the Tianshan Mountains piedmont plain salinization plant community correlation |
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