苏南丘陵区典型造林树种毛竹耗水特性研究  

A Study on water consumption characteristics of Phyllostachys edulis,a typical afforestation species in Southern Jiangsu Province of China

作　　者：刘鑫[1] 谢德晋 张金池[1] 庄家尧[1] 施倩[1] 岳健敏 韩诚[1] 

机构地区：[1]南京林业大学森林资源与环境学院,江苏南京210037

出　　处：《南昌工程学院学报》2014年第4期16-22,共7页Journal of Nanchang Institute of Technology

基　　金：长三角水源区面源污染林业生态修复技术研究项目(201104055-1);国家自然科学基金资助项目(31170663);江苏省高等学校林学优势学科建设项目(164010641)

摘　　要：2012年9月-2013年8月,利用Li-6400光合系统、包裹式树干液流仪和小气象站对南京东善桥林场的毛竹叶片蒸腾速率和树干液流速率及环境因子进行连续观测,研究分析毛竹蒸腾耗水特性.结果表明:(1)各季节毛竹叶片的蒸腾速率日变化为单峰曲线,春、秋、冬季净光合速率日变化表现为单峰曲线,夏季为双峰曲线,夏季蒸腾速率、净光合速率最高,气孔导度对毛竹蒸腾速率的影响较大.(2)不同季节不同天气条件下,树干液流速率日变化表现出明显的昼夜变化规律,春、夏、秋、冬季液流速率峰值分别为2.207 kg/h、4.380 kg/h、2.062 kg/h、0.300 kg/h.(3)毛竹春、夏季影响液流速率的主导因子为太阳辐射,秋、冬季为饱和水汽压差,土壤温度、饱和水汽压差是影响毛竹日液流量的主导因子.(4)分别建立了叶片蒸腾速率、树干液流速率、日液流量与影响因子的模型,模型可以较好地解释毛竹耗水特性.In order to study water consumption characteristics of Phyllostachys edulis,this paper conducts a continuous observation from September 2012 to August 2013 of the leaf transpiration rate,the sap flow rate and environmental factors by using LI-6400,sap flow meter and mini weather station in Nanjing Dongshanqiao Forest. The results indicate that：（1）the change of the transpiration rate（Tr ）takes on a single-peak curve in all seasons. So does the net photosynthetic rate（Pn ）in spring,autumn and winter. The Tr and Pn are at its highest in summer. Stomatal conductance has a prominent influence on the tran-spiration rate.（2）The sap flow rate of Phyllostachys edulis showes distinct diurnal changing rhythms both in sunny and cloudy days in different seasons. The crest values of the sap flow rate in spring,summer,au-tumn and winter are 2. 207 kg / h,4. 380 kg / h,2. 062 kg / h,and 0. 300 kg / h respectively.（3）The domi-nant environmental factors in spring,summer are solar radiation,but VPD in autumn and winter. Soil tem-perature and VPD have a significant impact on the average daily sap flow rate of Phyllostachys edulis.（4） The models which relate the transpiration rate,sap flow rate,daily sap flow with impact factors can explic-itly reflect the water consumption characteristics of Phyllostachys edulis.

关 键 词：毛竹 蒸腾速率 树干液流 耗水特性 苏南丘陵区 

分 类 号：S715.4[农业科学—林学]