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中文摘要：
采用实地调查和水浸法，研究了王朗保护区7种典型生态系统（草地（GL）、灌丛（SH）、白桦林（BF）、混交林（MF）、冷杉林（FF）、云杉林（SF）和方枝柏林（CF）的地被物层贮量吸水过程与最大储水量，并以此为基础评价该区域地被物层的水源涵养能力。结果表明：（1）不同生态系统地被物层贮量及其最大储水能力差异较大，其顺序依次为SF〉FF〉MF〉CF〉BF〉SH〉GL和SF〉FF〉MF〉CF〉SH〉BF〉GL；（2）在地被物的吸水过程中，储水量（Q）和吸水速率（S）与浸泡时间（t）的关系可分别用Q—cIn（t）＋d和S=at^-b拟合（R^2〉0．9）；（3）王朗保护区各种生态系统的地被物层累积贮量为5．36×10^5t，最大储水量为2．20×10^6t。从退化生态系统或采伐迹地的植被恢复过程中的水源涵养效益角度分析，亚高山植被恢复过程中的地被物层水源涵养潜力较大。
英文摘要：
The ground cover storage （GCS） and its water capacity of 7 typical ecosystems,which were grass land （GL）, shrub （SH）, birch forest （BF）, mixed forest （MF）, fir forest （FF）, spruce forest （SF） and cypress forest （CF） of Wanglang national nature reserve （WNNR） in the subalpine of western Sichuan had been studied by field survey and water-immersing, and the regional GCS and ground cover water capacity （GCWC） of WNNR had been assessed. The results indicated that： （1） The differences of GCS and its water capacity in each ecosystem were obvious, and GCS＇s order was SF〉FF〉MF〉CF〉BF〉SH〉GL while GCWC＇s order was SF〉FF〉MF〉CF〉SH〉BF〉GL; （2） In the process of all ground covers＇ water absorption, the relationships between GCWC （Q）, water-absorbing speed （S） and immersed time （t） had been well simulated by Q = cln（t）＋d （R^2 〉0.9） ands = at ^-b（R2 〉0.9）; （3） GCSandGCWCofWNNR were 5.36× 10^5 t and 2.20×10^6 t. With a view to vegetation restoration in subalpine of western Sichuan, this paper indicated that there was larger water conservation potential of ground cover in the ctimax （e. go FF and SF） and mixed forest.
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