摘要
通过全部调查法对防护林工程的次年苗木保存率进行了详细调查,结果显示:(1)由于造林环境恶劣,塔里木沙漠公路防护林工程苗木保存率较低,约70%;(2)梭梭、柽柳、沙拐枣三种苗木的保存率不同,基本表现为梭梭和沙拐枣大于柽柳,而且在不同矿化度条件下也存在差异,矿化度较小时差异不大,而随着矿化度的增加差异增大;(3)三种苗木的保存率都随灌水矿化度的增加而逐渐降低,但矿化度小于10 g/L时,变化规律性不强;(4)公路沿线苗木保存率呈一定的空间分异规律,在防护林横断面不同部位、垄间不同沙丘密度、纵向复合沙垄区不同地貌部位和公路沿线不同大地貌单元之间,苗木保存率存在差异。研究结果对于极端干旱环境中造林和塔里木沙漠公路防护林可持续性研究具有借鉴意义。
Second-year seedling survival rates of the Tarim Desert Highway shelter-forest project was investigated in detail with whole survey method, and the results show as follows： （1） seedling survival rate of Tarim Desert Highway shelter-forest project was lower than 70% because of bad afforestation environment. （2） Seedling survival rates among Haloxylon ammodendron, Chinese Tamarisk, Calligonum L. were different, Haloxylon ammodendron and Calligonum L. were basically more than that of Chinese Tamarisk, and seedling survival rates also differed under different irrigation water mineralizations, this difference increases with water mineralization enhancing, while this difference is little with small water mineralizations. （3） Three seedling survival rates decreases with irrigation water mineralization increase, but when the mineralization is lower than 10 g· L-1 , this regularity is not obvious. （4） Seedling survival rates along the desert highway has some spatial variation laws, and seedling survival rates are all different, which depend on the shelter-forest transverse section＇s position, sand-dune densities, landform positions in longitudinal complex sand dune zones, and large landform units along the highway, This study would help with afforestation in extreme arid environment and research on sustainability of the Tarim Desert Highway shelter-forest.
出处
《干旱区地理》
CSCD
北大核心
2010年第6期909-916,共8页
Arid Land Geography
基金
新疆维吾尔自治区重大科技专项项目(200733144-3)
中国科学院西部行动计划项目(KZCX2-XB2-13)
塔里木油田公司科研项目(971008090016
971008090017)资助
关键词
苗木保存率
空间分异
塔里木沙漠公路防护林:塔克拉玛干沙漠
seedling survival rates
spatial variation
the Tarim Desert Highway shelter-forest
the Taklimakan Desert
