Tree-ring Ecological Sensitivity Study And Application In The Adaptability Evaluation Of Trees

This article first selected the five common tree species in Shanxi area, which were Platanus orientalis, Populus alba, Pinus sylvestris, Robinia pseudoacacia, Metasequoia, and five specieswere picked out in three ecological distribution area(â…  area, northern Shanxi type â…¡ type of Jinzhong area, Southeast Shanxi III fact types).1Five species of annual ring width were measured in three ecological distribution area,and using the dispersion ring width, the tree species in the tree-ring ecological distribution area of sensitivity were calculated. Free-ring ecological sensitivity of Platinum orientalis in three ecological distribution was (0.734.1.7518.1.5075),Populus alba was (0.836.0.6340.0.986), Pinus sylvestris var. mongolica was (1.459.1.026.0.9147), Robinia pseudoacacia was (1.133.1.7936.1.186) Metasequoia was (2.6.1.744.0.77). Among them, the average sensitivity of Metasequoia glyptostroboides of was highest, and the average sensitivity of Populus alba was minimum. The result showed that Metasequoia glyptostroboides in three ecological areas of growth status change on ecological environment factor is very sensitive, and there wasno significant effection of ecological environment factors on the growth status of Populus alba in three ecological distribution area.2Through the evaluation of traditional ecological adaptability of five species in three ecological distribution area, the average ecological adaptability in three ecological distribution evaluation were reached.The evaluation of traditional ecological adaptability of Platinum orientalis was (2.182.2.13.2.039), Populus alba was (2.143.2.17.2.11), Pinus sylvestris was(1.731.1.83.1.79) Robinia pseudoacacia was (1.79.1.65.1.71),and Metasequoia was (1.397.1.46.1.54).Among them, the highest evaluation value ecological adaptation was Populus alba, evaluation of ecological adaptability of Metasequoia glyptostroboides was minimum,.The result explained that Populus alba Zaisan ecological distribution area was growing well, and Metasequoia glyptostroboides in three ecological distribution area was poor.3With the analysis of pairs of tree-ring ecological sensitivity and adaptability evaluation indexes of five species in three ecological areas.it could be demonstrated by R2numerical analysis and linear regression correlation coefficient value of five between the experimental species adaptability, rating scores and species sensitivity have a significant relationship, and it was negative. 4The above three points proved that annual tree-ring ecological sensitivity value is one of the basic indicators can be used as evaluation of ecological adaptability.