【摘要】 本文根据吉林、黑龙江两省的调查,描述了天然次生杨桦林群落的结构特点及其动态变化趋势,分析了山杨、白桦及其林下栽植的红松的生长过程.从杨桦林的结构、动态及生长规律,提出了合理的经营措施.更多还原

【Abstract】 Based on data investigated in Jilin Province and Heilongjiang Province,the structural characteristics and dynamic trend of natural secondary forest communities dominated by P. davidiana or B. platyphylla were described. The growth processes of the above mentioned two dominant trees and the Korean pine Sapling planted under their canopies were analysed. Some rational management measures were suggested on bases of the structure,dynamics and growth characteristics of the natural secondary forest communities.更多还原