摘要
基于塔里木河干流不同生境胡杨林10个采样点的土壤样品和胡杨胸径等调查情况,采用统计学的方法对塔里木河干流不同胡杨下土壤的水盐特征进行分析。结果表明:研究区土壤含水量随土壤深度呈增加趋势,不同土层深度的含水量不存在显著差异。距塔里木河干流横向距离越近,各土层的土壤含水量越高,土壤含盐量有增加的趋势。土壤含水量为16.75%~18.76%、土壤总盐量为0.08%~0.47%,有胡杨幼苗生长;土壤含水量为4.55%~16.75%、总盐量为0.47%~1.36%,大龄胡杨所占比例较大;土壤含水量低于4.55%、总盐量超过1.36%,胡杨呈老龄化趋势。塔里木河干流不同胡杨下土壤水盐存在一定差距,在胡杨的自然更复壮中,灌溉、排盐至关重要。
Based on the survey of soil samples from 10 sampling points of Populus euphratica forest and the DBH of P. euphratica in different habitats of the Tarim River, the water and salt characteristics of different P. euphratica under different streams in the Tarim River were analyzed by statistical methods. Results show that the soil water content in the study area increases with the soil depth, and there is no significant difference in the water content of different soil depths. The closer the lateral distance from the main stream of the Tarim River, the higher the soil moisture content of each soil layer, and the soil salt content tends to increase. P. euphratica seedlings can grow when the soil water content is 16.75%-18.76% and the total soil salt is 0.08%-0.47%. When the soil water content is 4.55%-16.75% and the total salt content is 0.47%-1.36%, the proportion of P. euphratica is larger. The soil water content is less than 4.55%, the total salt content is over 1.36%, and P. euphratica is aging.There is a certain gap between soil water and salt under different P. euphratica in the mainstream of Tarim River.In the natural rejuvenation of P. euphratica, irrigation and salt discharge are essential.
作者
杜伟宏
管文轲
霍艾迪
易秀
韦红
Du Weihong;Guan Wenke;Huo Aidi;Yi Xiu;Wei Hong(School of Environmental Science and Engineering,Chang’an University,Xi’an Shaanxi 710054,China;Key Laboratory of Ministry of Education for Subsurface Hydrology and Ecological Effects in Arid Region,Chang’an University,Xi’an Shaanxi 710054,China;Xinjiang Academy of Forestry,Urumqi Xinjiang 830000,China)
出处
《西南林业大学学报（自然科学）》
CAS
北大核心
2019年第5期92-99,共8页
Journal of Southwest Forestry University：Natural Sciences
基金
塔里木河中下游胡杨生态修复研究与示范项目(2017—HY)资助
关键词
塔里木河干流
胡杨
土壤
水盐
特征
Tarim River main stream
Populus euphratica
soil
water and salt
characteristics
