摘要
水土保持林的水源涵养效益是研究森林防止水土流失的一个热点问题。以20世纪80年代末期营造和自然恢复的湿地松林、桤柏混交林、刺槐(灌木)林 、刺槐林 和桤木林为研究对象,选择林冠截留、土壤容重、土壤孔隙度、土壤贮水能力、土壤渗透性和枯落物持水性,作为研究不同水土保持林结构模式水源涵养效益的指标,对不同水土保持林的水源涵养机理和水源涵养效益进行了较深入的研究。结果表明,各水土保持林的水源涵养能力均明显高于农耕地;不同水土保持林结构模式的水源涵养效益也有较大差异。最后提出了桤柏混交林、湿地松林、桤木林等优良水土保持林结构模式,为当地的生态环境建设,特别是当前正在进行的退耕还林工程的模式选择提供了依据。
The effects of water-source conservation of soil and water conservation forests paid a good deal attention to recently. In this paper, the researches was conducted in the stands of Pinus ellfottfi, mixed stands of Alnus crenastogyne and Cupressus ~unebris, the shrub of Robfnfa pseudoacacfa, the stands of Robinnia pseudoacacia and the stands of Alnus crenastogyne, which had been established and naturally restored in late 1980s. The mechanism and the effects of water conservation were deeply studied based on the indexes of factors as following: interception of canopy , soil bulk density, soil porosity , water-holding capacity, penetrability of soil and water holding characteristics of litter. The results show that the effect of every conservation forest was significantly superior to farm land. Among the models of protective forests studied, the effects are significantly different. Some more effective models of vegetation arrangement were suggested as following: The mixed forests of Alnus crenastogyne and Cupressus^funebris, the stands of Pinus ellyottii, Alnus renastogyne etc.
出处
《水土保持学报》
CSCD
北大核心
2004年第3期28-32,36,共6页
Journal of Soil and Water Conservation
基金
国家"十五"重点科技攻关计划"四川盆周低山区水土流失综合治理技术与示范"子课题(2001BA606A-06-3)
关键词
嘉陵江
上游地区
低山暴雨区
水土保持林
结构模式
水源涵养效益
soil and water conservation forest
water-source conservation
low hill heavy rain area
upper reach of Jialing River
