摘要
采用ICT-2000TE树干液流测定系统,对华南地区的主要造林树种马占相思的液流变化进行了为期1a的观测,并对树干液流变化特征、液流量日变化、各位点液流及全年液流量的变化进行了深入研究。结果表明:马占相思的树干液流量日进程呈单峰型曲线,雨、旱季的全天总液流量分别为10.988×103、5.082×103g,全年总液流量为2238.265×103g;马占相思木质部不同部位输水能力差异较大,液流速率最大的位点位于木质部15mm处;马占相思单位边材面积日累计液流量在雨、旱季分别为85.203×103、57.463×103g·m-2左右,整个过程呈"S"形。
ICT-2000TE system was used to investigate the stem sap flow of Acacia mangium, an important species for afforestation in south China, in 2003. The characteristics of stem sap flow change, the daily change of sap flow amount, the sap flow in different points and yearly fluctuation were analyzed. The results showed that the daily sap flow amount followed a monopeak curve. The amounts of daily total sap flow in rainy season and dry season were 10.988×10~3 g and 5.082×10~3 g respectively and the yearly total was 2 238.265×10~3 g. There esisted significant differences among different positions of A. mangium in water transferring capacity. The position with the fastest sap flow located at the xylem of 15 mm. The daily accumulated sap flow amounts of sapwood in rainy season and dry season were 85.203×10~3 g·m^(-2) and 57.463×10~3 g·m^(-2) respectively. The entire process of daily sap flow presented a S-shape curve.
出处
《林业科学研究》
CSCD
北大核心
2005年第3期331-335,共5页
Forest Research
基金
国家自然科学基金重大项目"热带天然林优势种群及人工林水分蒸腾量的研究"(30170743)
关键词
马占相思
热扩散法
树干液流
Acacia mangium
thermal dissipation method
stem-sap flow
