摘要
通过对长江滩地连续7年的水文动态以及滩地杨树人工林年轮生长序列的研究,分析杨树人工林个体生长与水淹时间、水淹深度以及气候因子的相应关系,建立相关模型.结果表明,林分个体胸径分布格局与滩地的高程具显著的相关性,水淹深度对直径生长的影响大于水淹的时间,而当年的径向生长与前一年8、9月水淹情况以及气候因子的关系明显.在滩地营造杨树人工林,以丰产为目的宜选择水淹深度小于2m的地域造林,淹水深度超过2m的地域宜适当密植,以培养小径材为主.
Through the analysis on the dynamics of flooding and the annual ring series of poplar trees on the beach land of Yangtze river in Anhui in the period of 1989～1997,the related models on flooded situation and ring growth were built.The results showed that there existed significant differences in flooding time and depth on different elevations of beach land,which made a great influence on the annual ring growth of poplar trees.The maximal flooded depth was more important than flooded time for its influence on ring growth.In addition,the flooded situation in August and September of previous year had a significantly negative influence on the ring growth of current year.The beach land with a maximal flooded depth of more than 2m was not suitable for high productive plantation of timber.It is suggested that a little more dense plantation should be managed for the production of pulp materials.
出处
《应用生态学报》
CAS
CSCD
2000年第1期25-29,共5页
Chinese Journal of Applied Ecology
基金
国家"九五"科技攻关项目! (96 0 0 7 0 2 0 6)
