摘要
采用固定标准地法,对南平溪后70年生杉木丰产林（山坡、山洼和32年“青年林”（山坡）及杉木林的前身杂木林的水源涵养功能进行了为时两年的研究,结果表明:杂木林林褥层的饱和持水量分别是杉木“青年林”和丰产林（山坡和山洼）的5.3倍、3.3倍和6.5倍,杂木林土壤层（10～40cm）饱和持水量分别比“青年林”和丰产林（山坡和山洼）高14.94％、13.81％和17.15％。杂木林林分总持水量分别比“青年林”和丰产林（山坡和山洼）高15.06％、13.73％和16.40％。杂木林表层（10～20cm）土壤初渗值和稳渗值分别是“青年林”和丰产林（山坡和山洼）的1.16倍、2.32倍和1.78倍。杉木林取代杂木林后林分水源涵养的功能下降,地上部分各水文层的持水作用随时间发生转移,表明其水源涵养功能的不稳定性。
Using the method of the fixed position observation, the function of water conservation of 70-year-old fast growth and high tyield stand of Chine se fir (hillside and hollow) and of 32-year-old “youth stand” of Chinese fir (hillside) and of broadleaf stand (predecessor of Chinese fir on the hill ridge ) were studied for 2 Jears in Anchaoxia, Qihou, Nanping, Fujian Province. The results showed that,
(1) Water-holding content of forest floor in broadleaf stand was each 5.3 times, 3.3 times, and 6.5 times as much as that of the “youth stand” and fas-growth, high yield stands(hillside andhollow); the saturation water-holding content of soil (0-40 cm) in broadleaf stand was each 14.94% , 13.81% and 17.15% higher than that of the “youth stand”, fast growth and high yield stands (hillside and hollow); total water-holding content in broadleaf stand was each 15.6%, 13.73% and 16.4% higher than that'of the “youth stand” and fast growth, high yield stand; initial infiltration value and stable infiltration valut of top soil(0-20cm) in broadleaf stand were each 1.22 times, 1.16 times, 2.32 times and 1.78 times, 1.64 times, 3.43 times as much as that of the “youth st-and”and fast growth and high yield stands.
(2)After replaced by Chinese fir, the water conservation function of the stand was cut down, and the function of function of water-holding in different
hydrological layers ofaerial part biomassof Chinese fir shifted in the course of natural succession, which indicated that the water coservation function in Chinese fir stand was nonstaqle.
出处
《福建林学院学报》
CSCD
1992年第2期125-131,共7页
Journal of Fujian College of Forestry
基金
福建省自然科学基金资助
关键词
杉木林
杂木林
水源涵养功能
function of water conservation , Chinese fir plantation , broadleaf stand
