摘要
针对渭北黄土高原人工刺槐林、油松林和宜林地土壤水分储量变化进行了多坡向定点调查分析,结果表明:林地土壤储水量受立地条件,林冠遮蔽,林内环境等因素相互作用,形成了一个水分自我供给系统,其潜力可用“林地有效水分潜力方程MT=ΔEF+ΔRQ-IP”加以表达和计算在降水量偏少,且分布不均的气候条件下,荒坡近裸立地上和有林木每年蒸腾消耗大量水分之后的林地上,水分收支关系有着本质的差异。故认为,渭北黄土高原林地土壤有效水分储量的多少与林冠作用和林内环境变化的存在着密切关系。
Based on the investigation and analysis of the change of soil water storage of Robinia pseudoacacia,Pinus tabulaefolia and suitable forest in the Loess Plateau of Weibei,China,the soil water storage capacity of forestland is affected by the interaction of site conditions,canopy shade and forest environment,forming a water self-supply system.Its potential can be expressed and calculated by"forest effective water potential equation MT=ΔEF+ΔRQ-IP".The relationship between water budget and water budget is essentially different between the barren slope and the forest after the forest consumes a lot of water by transpiration.It is concluded that the amount of soil available water storage is closely related to forest canopy action and forest environment change.
作者
杨保平
薛婷婷
Yang Baoping;Xue Tingting(Shaanxi Forestry Survey&Planning Institute,Xi'an,Shaanxi 710082,China)
出处
《绿色科技》
2022年第1期18-21,共4页
Journal of Green Science and Technology
关键词
渭北黄土高原
人工林
油松
刺槐
水分
Weibei Loess Plateau
plantation
Pinus tabulaeformis
Acacia
moisture
