白桦和新疆杨树干茎流变化规律及与环境因子的关系  

Variation of stem flow of Betula platyphylla andPopulus alba var. pyramdalis and their relationships to environmental factors

作　　者：王慧[1] 郭静[1] 王灵艳[1] 杜爽[1] 王朋朋[1] 

机构地区：[1]东北师范大学城市与环境科学学院,吉林长春130024

出　　处：《吉林林业科技》2011年第4期18-24,共7页Journal of Jilin Forestry Science and Technology

摘　　要：对白桦和新疆杨在7—10月的树干茎流速率变化规律及其与环境因子的关系进行了研究，结果表明：自桦的茎流日变化过程呈现单峰曲线，且变幅大，而新疆杨则呈现多峰曲线；茎流速率与环境温度呈显著正相关，与环境湿度呈显著负相关，与大气气压无显著相关性。两树种树干茎流到达峰值的时刻均表现为秋季比夏季晚约1h，且新疆杨比白桦到达峰值的时刻要早；7～10月两种树各月的茎流速率均值均呈先上升后下降的趋势。The variation of stem flow and their relationships with environmental factors were analyzed. Results showed that ： under sunny conditions, the diurnal stem flow of B. platyphyUa displayed a single - peak curve and a large variation range. In sunny cloudy conditions, the diurnal stem flow of P. alba vat. pyramdalis were multi - peak curves. The rate of stem flow was significantly positively correlated with air temperature, negatively correlated with air humidity and insignificantly correlated with the atmospheric pressure. The time of the two tree species reaching peak stem flow in Autumn was one hour later than those in Summer. The peak time of B. platyphylla was earlier than that of P. alba. var. pyramdalis. From July to October, all the average of stem flow rates of the two species increased first the declined later.

关 键 词：白桦 新疆杨 茎流 环境因子 

分 类 号：S718.43[农业科学—林学]