乌梁素海芦苇资源演变及影响因素分析

在广泛调查并取得大量详实资料基础之上,探讨乌梁素海芦苇资源近30年的演变规律。发现乌梁素海芦苇资源经历了一个分布面积由小到大,产量由少到多的过程,现在稳定在1×105t左右。芦苇资源的扩张受多种环境因素的影响,包括入湖水量、营养负荷、矿化度等。芦苇产量和河套灌区的排水量,施肥量尤其是氮肥使用量密切相关。从根本上讲,河套灌区农业活动导致的湿地状态改变是乌梁素海芦苇群落演变的根本原因。

Effects of Environmental Factors on Evolution of Reed Community in Wuliangsu Lake, Inner Mongolia

Wuliangsu Lake is a Phragmites-dominated wetland in the arid and semi-arid region,northwestern China.Based on detailed datum and investigation,we try to find out the trend of reed expansion in thepast 30 years.With the eutrophication,the area occupied by reed became larger,and the production increased correspondingly.The expansion of reed has been affected by many environmental factors,suchas water inflow,nutrients,salinity etc.The reed production was connectedwith the discharge water and theamount of fertilizer application,especially the nitrogenous fertilizer in Hetao irrigation district.And now reed resource is facing problems including water deficit,the deteriorationof water quality.In order to maintain thehealth of reed growth and the restoration of wetland ecosystem services,measures should be taken to control eutrophication such as adding the water inflow and decreasing the pollutants.