Edaphon And Function Intensity Of Ancient Platycladus Orientalis And Roadside Trees Gingko Biloba Setting Up In The Soil Research

The Beijing city old tree (big tree) appears the varying degree feeble phenomenon, affects the landscape effect seriously.This article by the different tree age, different coveres, the rejuvenation and not rejuvenation, the different healthy degree ancient Platycladus orientalis as the main object of study, meanwhile has studied the health and the feeble roadside trees Gingko biloba.Used traditional the plate dilution to study the ancient Platycladus orientalis and the Gingko biloba grows setting up in the soil edaphon quantity and microorganism's function intensity, (big tree) rejuvenated from edaphon's angle for the Beijing city old tree provides the theory basis.The result indicated that:1 In Spring,the second level of ancient Platycladus orientalis setting up in the soil edaphon quantity (organic phosphobacteria exception) and the function intensity is higher than the first level of ancient Platycladus orientalis; In Summer, different tree age ancient Platycladus orientalis setting up in the soil edaphon quantity and function intensity with spring findings basic consistent, namely the second level of ancient Platycladus orientalis setting up in the soil edaphon quantity (fungus exception) and the function intensity is higher than the first level of ancient Platycladus orientalis, also summer ancient Platycladus orientalis setting up in the soil edaphon quantity (fungus exception) and the function intensity is higher than the spring.2 The different vegetation displays the obvious difference to the ancient Platycladus orientalis setting up in the soil edaphon quantity and the function intensity. In Spring, the summer, the autumn three sampling, Othiopogon japanicus cover ancient Platycladus orientalis setting up in the soil edaphon quantity and the function intensity quite are many in four kind of cover vegetations, next for wild Orychophragmus violaceus, Leguminosae, but Festuca elata keng cover ancient Platycladus orientalis setting up in the soil edaphon quantity are least.Four planter superpositions cover ancient Platycladus orientalis setting up in the soil edaphon quantity and the function intensity, the summer determination result obviously is higher than the spring and the autumn.3 The healthy ancient Platycladus orientalis setting up in the soil edaphon quantity, the nutrient content, the nutrient transform the related soil aminating and the phosphorus transformation intensity are higher than the feeble ancient Platycladus orientalis.Healthy and feeble Platycladus orientalis setting up in the soil edaphon quantity is highest in the summer, the early fall season is high, late autumn the season is lowest.4 After the rejuvenation the ancient Platycladus orientalis setting up in the soil ,soil nutrient content, microorganism quantity, the microorganism function intensity is higher than has not rejuvenated the ancient Platycladus orientalis, after also the rejuvenation the ancient Platycladus orientalis sets up the place 25-30cm soil layer soil various microorganisms quantity and the function intensity is higher than the 35-40cm soil layer soil.5 The healthy Gingko biloba tree and the feeble Gingko biloba set up (rhizosphere and non-rhizosphere) in the soil microorganism quantity, the soil nutrient content, the edaphon function intensity three change tendencies are consistent, also displays the obvious rhizosphere effect.The healthy Gingko biloba sets up in the soil microorganism quantity, the soil nutrient content, the edaphon function intensity is higher than the feeble tree.