干旱和半干旱区油蒿对土壤空间异质性的响应  

Response of Artemisia ordosica Population to Spatial Heterogeneity of Soil in Arid and Semi-arid Regions

作　　者：胡旭[1] 王海涛[1] 卢建国[1] 丛培芳[2] 何兴东[1] 高玉葆[1] 董治宝[3] 

机构地区：[1]南开大学生命科学学院,天津300071 [2]南开大学环境科学与工程学院,天津300071 [3]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《中国沙漠》2007年第4期588-592,共5页Journal of Desert Research

基　　金：中国科学院知识创新工程重要方向项目(KZCX3-SW-341)资助

摘　　要：空间异质性影响种群的分布和波动。在对数据进行归一化处理的基础上,应用地统计学方法研究干旱和半干旱区两个气候带内油蒿对土壤空间异质性的响应。结果表明:在中等尺度(500m样线,间隔10m取样)上,腾格里沙漠沙坡头固定沙地土壤水分的空间异质性大于毛乌素沙地芹河半固定沙地,相应地,沙坡头地段油蒿密度、有机质、全氮和有效磷含量的空间异质性大于芹河地段,因而认为,土壤水分的空间异质性决定油蒿密度的空间异质性,进而又反作用于土壤养分的空间异质性。结合油蒿生物量的空间异质性分析认为,土壤水分的空间异质性并不总是能够影响植物生物量的空间异质性。进一步分析表明,对于沙坡头地区,适当进行放牧或者其他干扰,将有助于增大土壤属性的空间异质性,以促进油蒿植被的持续存在。Spatial heterogeneity affects geostatistics method was used to study the distribution and fluctuation the spatial heterogeneity of A. of plant population. In this paper the ordosica population and soil moisture on the basis of data normalization in Shapotou area of Ningxia Hui autonomous region and Qinhe area of Shanxi province. The results showed： on the middling scale of sampling, the heterogeneity of soil moisture in Shapotou area was greater than that of Qinhe area, correspondingly, the heterogeneity of the plant density and contents of the organic matter, total nitrogen and available phosphorus in Shapotou area were greater than those of Qinhe area. It is concluded that the heterogeneity of soil moisture affects the heterogeneity of A. ordosica population, in return affects the heterogeneity of soil nutrients; the heterogeneity of soil moisture could not always influence the heterogeneity of biomasses of the plant. Further analysis showed that A. ordosica vegetation in Shapotou area should be properly interfered, for example by grazing, to increasing the spatial heterogeneity of soil attributes, thus the plant community could exist for a long time.

关 键 词：油蒿 土壤水分 土壤养分 种群 空间异质性 

分 类 号：Q948.113[生物学—植物学]