Site type classification for the shelter-forest ecological project along the Tarim Desert Highway  

作　　者：LI BingWen XU XinWen LEI JiaQiang QIU YongZhi XU Bo ZHOU HongWei WANG Qiang WANG BO SU Wei 

机构地区：[1]College of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China [2]Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China [3]Tarim Branch,PetroChina Company Limited,Korla 841000,China

出　　处：《Chinese Science Bulletin》2008年第S2期31-40,共10页

基　　金：Supported by Major Orientation Foundation of the CAS Innovation Program (Grant No. KZCX3-SW-342);CAS Action-Plan for West Development (Grant No. KZCX2-XB2- 13);Major Scientific and Technological Special of Xinjiang Uygur Autonomous Region (Grant No. 200733144-3);National Natural Science Foundation of China (Grant No. 40701019);the research projects of the Tarim Branch of PetroChina Company Limited (Grant Nos. 971008090016 and 971008090017);the Western Light of the Chinese Academy of Sciences (Grant No. 20052118)

摘　　要：Site types of the afforestation region of the shelter-forest ecological project along the Tarim Desert Highway were classified based on the natural conditions and windblown sand damages. The extremely severe environment, the irrigation with saline water, and large-scale linear project makes this classification of site types most unique and significant. It adopted a three-level classification system integrating the dominant factors and restrictive factors in regard to their impacts on plant survival and growth as well as on the protective property. Six site type districts were classified based on the medium-scale geomorphic unit, the windblown sand damages, and the major production facilities; 21 site type groups were obtained according to the small-scale geomorphic type, terrain, and wind regime; 36 site types were further classified based on the salt contents of the underground water and soil types. Especially, in this study, spatial distribution of the six site type districts along the desert highway is continuous, which is unique and different from that of most other classifications. In addition, the salt-stress tolerance threshold of the main afforestation plant species to underground water have been set to 8 g/L and 15 g/L according to selective breeding tests and the salinity spatial distribution of the underground water. Thus, the underground water with salinity lower than 8 g/L is defined as light saline water in this area.Site types of the afforestation region of the shelter-forest ecological project along the Tarim Desert Highway were classified based on the natural conditions and windblown sand damages. The extremely severe environment, the irrigation with saline water, and large-scale linear project makes this classification of site types most unique and significant. It adopted a three-level classification system integrating the dominant factors and restrictive factors in regard to their impacts on plant survival and growth as well as on the protective property. Six site type districts were classified based on the medium-scale geomorphic unit, the windblown sand damages, and the major production facilities; 21 site type groups were obtained according to the small-scale geomorphic type, terrain, and wind regime; 36 site types were further classified based on the salt contents of the underground water and soil types. Especially, in this study, spatial distribution of the six site type districts along the desert highway is continuous, which is unique and different from that of most other classifications. In addition, the salt-stress tolerance threshold of the main afforestation plant species to underground water have been set to 8 g/L and 15 g/L according to selective breeding tests and the salinity spatial distribution of the underground water. Thus, the underground water with salinity lower than 8 g/L is defined as light saline water in this area.

关 键 词：TARIM DESERT Highway shelter-forest site type classification SALINE water Xinjiang AFFORESTATION 

分 类 号：U418.9[交通运输工程—道路与铁道工程] U419.91