摘要
20 0 1年 4— 1 0月 ,对北京西山地区一块 31年生的油松、栓皮栎混交林的林地蒸散和水量平衡进行了研究 .结果表明 ,通过标准木的标准比导率和树木胸径和边材面积的相关模型 ,可以比较准确地推算出林分的蒸腾耗水量 .油松和栓皮栎混交林的蒸腾耗水表现出明显的季节差异 ,栓皮栎的生长季标准比导率明显高于油松 ,是油松的 2 6倍 .就北京西部山区而言 ,林分存活与否的关键在于其是否能够经受住春季降雨少、气温高、湿度低。
From April to October of 2001,a 31 year old Pinus tabulaeformis and Quercus variabilis mixed stand was studied on forestland evapotranspiration and water balance in western mountainous area of Beijing.The results show that the water consumption of transpiration can be reckoned through standard specific conductivity of standard tree and the relative model between breast height diameter of tree and sapwood area.The water consumption of transpiration of Pinus tabulaeformis and Quercus variabilis mixed stand has marked seasonal difference,and the standard specific conductivity of Quercus variabilis in the growing season is 2 6 times as high as that of Pinus tabulaeformis .As for western mountainous area of Beijing,the key factor of survival lies in whether it can stand the drought environment factors,such as less rainfall,higher air temperature,lower humidity and less soil water,etc.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2004年第2期48-51,共4页
Journal of Beijing Forestry University
基金
国家自然科学基金项目 ( 3 0 0 70 63 7)
教育部高等学校博士点基金及骨干教师资助项目共同资助
关键词
混交林
林地蒸发
水量平衡
mixed forest, forestland evapotranspiration, water balance
