伊犁大、小西沟野生樱桃李分布区的土壤条件  

Study on the evaluation of ecological frangibility of the wetlands in the Bosten Lake Region

作　　者：武红旗[1] 范燕敏[1] 王磊[1] 钟骏平[1] 

机构地区：[1]新疆农业大学,新疆乌鲁木齐830012

出　　处：《干旱区地理》2006年第2期287-291,共5页Arid Land Geography

基　　金：国家自然科学基金(30360067);新疆维吾尔自治区土壤学重点学科资助

摘　　要：野生樱桃李在我国仅见于伊犁霍城县的大、小西沟。野果林下的土壤过去被定名为野果林土。通过对野生樱桃李主要分布区的土壤调查,发现属于山地黑钙土(按中国土壤系统分类为均腐土)和冲积土(冲积新成土)。由土壤发育滞后形成的土壤植被不对应是区域干旱化的证明。地表生草过程强烈对以种子繁殖为主完成世代更新的野生樱桃李十分不利。The Daxigou and Xiaoxigou valleys are located in the south slope of the Bolohollo Mountains, where the highest peak is over 3600 m a. s. l., the elevation of the piedmont line is about 1000 m a. s. l. According to the elevation, mountain body structure and aboveground vegetation, the Bolohollo Mountains can be divided into the alpine and subalpine zones （2800-3600 m a. s. l. ）, mid - mountain zone （1600-2800 m a. s. l. ） and low - mountain zone （ 1000-1600 m a. s. l ）. The alpine, subalpine and mid - mountain zones are precipitous, and the low - mountain zone slopes gently. The low - mountain zone is generally covered by thin loess, and Prunus divaricata grows in this zone （1150- 1450 m a. s. l. ）. Prunus divaricata grows only at Daxigou Valley and Xiaoxigou Valley in Huocheng County, Yili region. The soil under the wild fruit forests was termed as wild fruit forest soil in the past. The soil survey in the main distribution areas of Prunus divaricata reveals that the soil there should be classified as mountain chernozem （isohumisols according to Chinese Soil Taxonomy） and alluvial soil （alluvial Entisols）. Non - correspondence of soil and vegetation caused by soil development hysteresis is the evidence of occurring regional aridity. Strong soddy process at land surface is extremely disadvantageous to the growth of Prunus divaricata which depends mainly on seeds to complete alternation of generations.

关 键 词：伊犁 大小西沟 野生樱桃李 分布区 土壤条件 

分 类 号：Q948.1[生物学—植物学]