Title: Effect of Survival Time on the Transpiration and Photosynthetic Characteristics of Pinus Sylvestris var. mongolica After Transplantation
Abstract: The 15-year-old Pinus sylvestris var. mongolica which have survived 1 a,2 a or 3 a after transplantation were chosen.The net photosynthetic photosynthetic rate,transpiration rate and diurnal variation of stomatal conductance and leaf rate,transpiration rate and diurnal variation of stomatal conductance and leaf water potential changes were measured by the Li-6400.The key ecophysiology factors affecting the survival were used to investigate the status of the trees recovery.The results showed that,firstly,owing to the different transplant survival time,transpiration had different levels of response to environment factors and the peak times were different.The pine transpiration rate of Pinus Sylvestris var.mongolica which survived 2 a and 3 a are increased greatly than the trees survived 1 a in each time.Secondly,photosynthetic rates of the Pinus Sylvestris var.mongolica increased significantly with the increase of the transplant survival time.Moreover,Pinus Sylvestris var.mongolica daily change curve of water use efficiency were bimodal at different transplant survival time.The average daily water use efficiency of the transplanted tree for 1,2 and 3 transplant years were 3.350 6,3.320 3,and 2.297 6 respectively.There is no difference significanly between the average daily water use efficiency of the three treatments.It was demonstrated that the transplanted trees survived after 2 or 3 a was significantly recovered.Therefore,the first year is crucial to the transplanted trees and special conservation measures should be taken to promote their survival and recovery of trees.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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