沙地樟子松蒸腾耗水的生态学特征  

Study on ecological characteristics of transpiration and water consumption of pinus sylvestris var.mongolica in sand

作　　者：白雪峰[1] 韩辉[1] 周凤艳[1] 张日升[1] 赵国军[1] 刘建华[1] 

机构地区：[1]辽宁省固沙造林研究所,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2011年第3期404-407,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家十一五科技支撑项目(2006BAD08A11106);辽宁省十一五科技攻关项目(2006207001);辽宁省自然科学基金资助项目(2041005)

摘　　要：以章古台地区樟子松人工固沙林为研究对象,开展樟子松蒸腾特性与耗水量研究,研究结果表明:樟子松蒸腾日进程呈双峰曲线变化,并存在蒸腾午休现象;生长季内蒸腾强度大体呈单峰状变化,5、6、9月份较弱,7、8月份最强,最大值出现在7月,为0.677g.g-1FW.h-1;环境因子与蒸腾强度Y按相关紧密程度排序分别为光照X1、土壤含水率X5和空气相对湿度X3,通过逐步回归分析建立回归方程为:Y=0.271 X1+0.007 X3+0.063 X5-0.95;通过分析估算,确定密度为1420株.hm-2的26 a樟子松人工固沙林年耗水量约为0.596万t.hm-2。This study investigates the transpiration characteristics and water consumption of man-planted pinus sylvestris var. mongolica in sand at Zhanggutai area. The results show that the daily transpiration of the tree follows a double-peak curve with a ＇noon break＇. However, the growing seasonal transpiration roughly follows a single-peak curve, low in May, June, and September, high in July and August, with a maximum transpiration of 0.677 g.g-lFW.h-I in July. The main meteorological factors effecting transpiration strength of the tree are light intensity X1, soil moisture X5, and air humidity X3. The regression equation is obtained using stepwise regression method, which is Y=0.271X1＋0.007X3＋0.063X5-0.95. As estimated, the water consumption of pinus sylvestris vat. mongolica man-planted forest （age 26 and 1420 plants/ha） is approximately 5960 t/ha per year.

关 键 词：沙地 樟子松 蒸腾 耗水量 含水率 

分 类 号：X503[环境科学与工程—环境工程]