摘要
针对黄土高原土石山区植被群落蒸散量测定及其分量确定的问题,基于林地水分平衡原理,提出了“多树水分平衡法”的概念、具体布设和计算方法,并应用本方法较为准确地测定了2种不同密度的华北落叶松林分的蒸散量及其分量,通过与热脉冲测定方法的对比和验证,表明2种方法计算结果相差不大,说明它可以作为测水分平衡的一种方法加以应用,最后对该方法在理论和实践中存在的若干问题进行了探讨。
Based on the principle of water balance in forest ecosystem, a new method named “ water balance measurement of multiple-trees”for measuring evapotranspiration and its components was developed for the forest/vegetation in the stony mountain area of Loess Plateau. The corresponding concept, research design and measurement methods were also described in detail in the paper. The transpiration of two stands of Larix principi-rupprechtii with different density was estimated by the method. The comparison indicated that the stand transpiration in growing season of 2002 was close to the value estimated by heat pulse method. This means that the suggested method of water balance measurement of multiple-trees can be used as a practicle method.Finally, some problems related with the theory and application of this method were discussed.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2005年第4期184-188,共5页
Scientia Silvae Sinicae
基金
国家重点基础研究发展规划项目(2002CB111501)
国家自然科学基金重点项目(30230290)
国家林业局引进国际先进技术(2003-4-43)
国家"十五"科技攻关计划项目(2001BA510B02-06)
科技部社会公益研究专项(2004DIB3J102)
国家林业局森林生态环境重点实验室共同资助。
关键词
森林蒸散
土壤水分平衡
多树水分平衡法
Forest evapotranspiration
Soil water balance
Water balance measurement of multiple-trees
