Survey and Protection of Old Trees Resources in Lingyuan City
Lingyuan City in western Liaoning Provine,has rich plant resources because of its complex and diverse natural environment,and preserves a large number of old trees. According to the investigation re- cords,there are thirty--three tree species with 389 trees which have more than 200 years--old history. This paper analyzes the protection status and problems, and describes the survey methodology and its effective management and protection of technical measures.
NETL
NSTL
万方数据
维普
