摘要
选取北京地区4种常见绿化树种,利用TDP液流计测定其树干液流,分析不同树种液流特性差异,同时应用Meter全自动气象站对气象数据进行实时监测,探讨外界环境因素对树干液流的影响。结果表明:各树种液流日变化呈双峰或单峰曲线,昼夜变化规律明显。启动时间基本在6:00—7:00,且液流密度日均值大小排序为国槐[1.62×10-3 cm 3/(cm 2·s)]>侧柏[1.51×10-3 cm 3/(cm 2·s)]>栾树[0.80×10-3 cm 3/(cm 2·s)]>油松[0.58×10-3 cm 3/(cm 2·s)],且各树种夜间液流均为夏季小于秋季;各树种的液流与不同层次土壤温度相关性多为不显著(P>0.05),与大气温度呈极显著正相关(P<0.01),而与大气相对湿度则呈显著(P<0.01)负相关,且液流变化与各环境因子均存在一定的时滞效应。研究结果可为水资源管理以及城市绿地规划提供数据支撑。
The study analyzed the differences of the sap flow characteristics for four common greening tree species to explore the influence of the external environment factors on the stem sap flow in Beijing,to measure its stem sap flow by using TDP sap flow meter.The daily variation of various tree species’sap flow variation showed bimodal or unimodal curve.And they changed clearly day and night.The sap flow of tree species started about 6:00-7:00,and the sap flow density was Sophora japonica[1.62×10-3 cm 3/(cm 2·s)]>Platyclodus orientalis[1.51×10-3 cm 3/(cm 2·s)]>Koelreuteria paniculata[0.80×10-3 cm 3/(cm 2·s)]>Pinus tabuliformis[0.58×10-3 cm 3/(cm 2·s)]on a daily average basis.Tree species’sap flow was in summer less than autumn during the night.And the sap flow was not significantly correlation with different levels,soil temperature(P>0.05),and was significantly positive correlation with atmospheric temperature(P<0.01),whereas was significantly negative correlation with atmospheric relative humidity(P<0.01).The change of sap flow had a certain time lag effect with environmental factors.The result could provide data support for management of water resources and urban green space planning.
作者
李少宁
鲁绍伟
赵云阁
陶雪莹
赵娜
徐晓天
LI Shao-ning;LU Shao-wei;ZHAO Yun-ge(Beijing Academy of Forestry and Pomology Sciences,Beijing 100093;Yanshan Forest Ecosystem Research Station of Beijing,Beijing 100093)
出处
《安徽农业科学》
CAS
2020年第20期111-116,共6页
Journal of Anhui Agricultural Sciences
基金
北京市农林科学院科技创新能力建设资助项目(KJCX20200207,KJCX20190301,KJCX20190403,KJCX20200601)。
关键词
绿化树种
液流密度
环境因子
Greening tree species
Sap flow density
Environmental factors
