冀北山地油松和落叶松林下枯落物的水文效应
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国家林业局林业公益性行业科研项目“典型区域森林生态系统健康维护与经营技术研究”(200804022)


Hydrological Effects of Pinus Tabulae f ormis and Larix Princpis Forest Litters in North Mountain of Hebei Province
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    摘要:

    对河北省木兰围场国有林场内油松、落叶松人工林枯落物水文效应进行了调查.结果显示,油松、落叶松枯落物厚度分别为6.1和4.0cm,枯落物蓄积量为33.93和43.16t/hm2;浸泡24h后测定油松枯落物的含水量为268.10g,落叶松枯落物含水量为157.54g,二者的有效拦蓄量分别为30.07和57.56t/hm2.油松、落叶松林下枯落物持水量、吸水速率与浸水时间的变化规律基本一致,枯落物持水量与浸水时间存在对数曲线关系,而吸水速率与浸泡时间存在幂函数关系;枯落物浸水0~4h内吸水速率最大,4~8h内逐渐变缓,10h后其持水量基本达到最大值.

    Abstract:

    This study investigated water-holding characteristics of Pinus tabulaeformis and Larix princpis forest litter found in Mulan-Weichang National forest farm. The results show that in the Pinus tabulaefor-mis and Larix princpis forests, the litter was as thick as 6.1 and 4.0 cm, with total water holding capacity of 33.93 and 43.16 t/hm2, absorbed water contents of 268.10 g and 157.54 g(measured after 24 h immer-sion), and effective interception capacity of 30.07 and 57.56 t/hm2, respectively. The litters of Pinus tabu-laeformis and Larix princpis showed similar water-holding capacity, water absorption rate and soaking time. Overall, the relationship between litter water-holding capacity and soaking time was described well with a logarithmic curve, and that between the water absorption rate and soaking time was fitted well with a power function. The water absorption rate was fastest in the initial 0-4 h, decreased gradually in 4-8 h after immersion, and the water content reached its maximum water-holding capacity after 10 h.

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梁文俊,丁国栋,周美思,臧荫桐,贺宇,安云,高广磊,包岩峰.冀北山地油松和落叶松林下枯落物的水文效应[J].水土保持通报,2012,(4):71-74

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  • 收稿日期:2011-10-05
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  • 在线发布日期: 2014-11-25
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