上海大树移植的本底土质量调查与评价

对上海13个区共450个大树移植的本底土的质量进行了调查。结果表明：土壤有机质含量达标率为74．33％：容重达标率为76．45％；通气孔隙度达标率为57．33％；土壤呈碱性和强碱性；离子总浓度大多正常。本底土质量总体较差．尤其是行道树的大树移植本底土质量更差，不能完全满足移植大树的恢复生长。针对存在的问题，通过添加富含有机质的酸性介质、敷设通气管等方式改良土壤理化性质，确保上海大树移栽的成功。

Investigation and Evaluation of Background Soils Quality for Tree Transplantation in Shanghai

The quality of 450background -soil s amples for tree transplantation fro m 13districts of Shanghai was investigated.The results showed that 74.33%for organ ic matter,76.45%for bulk density an d 57.33%for non -capillary porosity of the samples met the standards,respectively.The so il samples were alkalinity or strong alkalinity,and most of them showed n ormal ion concentration.In general,the background soil qualities are so bad and even worse for those of the roadside,that they are not s uitable for growth of the transplanting trees.Due to the prob lems,the soils physicochemical pro perty was ameliorated by adding acid ic medium with high organic matter and utilizing vents so as to assure the success of tree transplanta tion.