Full-Text Search:
Home|About CNKI|User Service|中文
Add to Favorite Get Latest Update

Transpiration and water consumption of Sophora japonica potted-seedlings in different thermal circumstance

LI Guang-de1,JIA Li-ming1,KONG Jun-jie1,2,LI Xiao-wen3(1.The Key Laboratory for Silviculture and Conservation of Ministry of Education,Beijing Forestry University,Beijing 100083,China;2.Fengtai District Landscape and Forestry Administration of Beijing Municipality,Beijing 100071,China;3.Laboratory of Forest Resources and Ecological Environment,Zhejiang Insititute of Subtropical Crops,Wenzhou,Zhejiang 325005,China)  
To prove the influence of different micro heat environment on transpiration and water consumption of Sophora japonica L.to provide basis for scientific and reasonable irrigation system of urban greenland,"the method of (measuring) the variation of carbon dioxide" (Li-6400 portable photosynthesis system) and whole-tree weighing methods were used to investigate the transpiration and water consumption characteristics of S.japonica potted-seedlings on different underlaying surface.The results showed that the ground-surface temperature and the air relative humidity on different underlaying surface were significantly different (P0.05),but the air temperature on different underlaying surface were not.The transpiration rate (Tr) of S.japonica on different underlaying surface were significantly different (P0.05),but the net photosynthesis rate (Pn) on different underlaying surface were not.The Tr of S.japonica on cement-road surface was 1.17 to 2.1 times than that on the surface of turf,and the Pn on cement-road surface was slightly higher than that on the surface of turf.Daily water consumption of S.japonica per unit leaf area on different underlaying surface was significantly different (P0.05).Transpiration rate of S.japonica was positively significantly or highly significantly correlated with the ground-surface temperature,but was negatively correlated with the air relative humidity.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©CNKI All Rights Reserved