摘要
对黑龙江省东部地区水曲柳天然林林下灌草层、枯枝落叶层、土壤水分物理性质以及土壤渗透性能的研究表明 :林下灌草层的存在显著增强了林分对水分的调蓄能力 ,最大持水量为 5 .4 2～ 11.2 8t·hm-2 。枯落物的持水量较低 ,仅为 12 .0 0～ 13.0 0t·hm-2 。水曲柳林土壤最大蓄水量为 3344 .0 0～ 345 5 .94t·hm-2 ,有效蓄水量为319.16～ 4 0 0 .6 5t·hm-2 。林地土壤的初渗、稳渗速度以及达到稳渗的时间都较荒地有明显的不同。综合分析表明 ,水曲柳天然林具有显著的水源涵养效益 ,对于保证该地区水资源的可持续利用具有重要意义。
The water source protection functions about shrub-grass layer and litter layer, soil-water physical properties, infiltration and water holding capacity of soil for Fraxinus mandshurica natural forests in the eastern region of Heilongjiang were investigated. The results showed that the shrub-grass layer under canopy had a marked function of water conservation, and its maximum water-holding capacity varied from 5.42 to 11.28 t·hm -2, but the water-holding capacity for the litter layer varied only from 12.00 to 13.00 t·hm -2. The maximum water-holding capacity of soil in Fraxinus mandshurica forests was 3 344.00～3 455.94 t·hm -2, and its effective water-holding capacity was 319.16～400.65 t·hm -2. The initial infiltration rate, stable infiltration rate and the time needed to reach the stable state for every soil layer of Fraxinus mandshurica forests were all superior to those of wasteland. As a result, the Fraxinus mandshurica natural forests have remarkable functions of water conservation, and it can play an important role in water sustainable use.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2004年第5期1-3,共3页
Journal of Northeast Forestry University
基金
黑龙江省重大科技攻关项目 (GA0 2B60 1 )
