柽柳灌丛热量收支特性与蒸散研究  

Study on Heat Budget Characteristics and Evaporanspiration for Tamaris Spp

作　　者：张小由[1] 龚家栋[1] 周茂先[1] 司建华[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《高原气象》2004年第2期228-232,共5页Plateau Meteorology

基　　金：国家重点基础研究规划发展项目(GA199904230601);中国科学院知识创新工程方向性项目(KZCX3 SW 329);中国科学院知识创新工程项目(KZCX1 10 03 01)共同资助

摘　　要：Bowen能量平衡法是广泛用于测定各种低矮植物蒸散的常用方法。本文将改进的波文比—能量观测系统用于测定灌木—柽柳群落的测定,通过6～9月对感热通量、潜热通量、土壤热通量等的测定,计算出额济纳地区柽柳灌丛(6～9月)的蒸散量为335.31mm;在8月潜热通量占能量支出量的62.85%,感热通量占32.85%,土壤热通量占4.44%。在日变化中,潜热在上午大于感热,下午感热交换大于潜热。The Bowen ratioenergy balance can be used widely in observing the evapotranspiration of all kinds of scrubby vegetable. In this paper, the improved Bowen ratioenergy balance system is used in observing the evapotranspiration of Tamarix spp. Through the measurement of sensible heat, latent heat and soil heat fluxes from June to September, the evapotranspiration of Tamarix sppis 335.31 mm; the latent heat flux, 62.85 percent of total energy; and sensible heat flux, 32.85; while the soil heat flux, 4.44 in August. As for their daily variation, the latent heat flux is larger than the sensible heat flux in the moring, but vice versa in the afternoon.

关 键 词：额济纳地区 柽柳 波文比—能量平衡系统 净辐射 蒸散 

分 类 号：S793.5[农业科学—林木遗传育种]