【摘要】 本文在对珠防二期工程监测样地调查、测定的基础上,对珠防工程幼林的水源涵养功能进行了评价。3～4年生珠防林幼林的综合持水能力在2355.25～2457.08t/hm~2之间,比荒山高3.7%～8.2%。其中土壤贮水量、枯落物持水量、植冠层的持水能力分别比荒山高3.65%～8.03%、21.4%～61.1%和42.9%～305.3%。植冠层和枯落物层的持水能力比土壤持水能力小得多,林分的贮水主体为林地土壤。工程实施初期林地对降雨贮蓄量为241.02×10~6m~3,其水源涵养效益为11.22×10~6m~3。从流域宏观层面分析,珠防林幼林初步发挥出调节水分分配的作用,从微观层面分析,珠防工程幼林对径流的影响不明显,对水分的调节作用还很弱。更多还原

【Abstract】 The water conservation function of young plantation of Pearl River Shelterbelt Construction Project was evaluated,based on the investigation on the plots of the second phase of the project.The result showed that 3 to 4-year-old plantation has total water-holding capacity of 2355.25～2457.08 t/hm~2,higher than that of bar- ren hills by 3.7%～8.2%,among which the water-holding capacities of the soil,litter and canopy are higher than those of barren hills by 3.65%～8.03%,21.3%～61.1% and42. 9～305.3%,respectively.Com- pared with the water-holding capacities of the canopy and the litter,the water-holding of the soil is much higher and thus the soil serves as the main water reservoir.更多还原