不同种源枫香幼龄林生长性状及物候节律研究

通过对我国10个枫香地理种源6 a生幼龄林树高、胸径和材积等生长性状以及物候节律进行观测。结果表明:不同种源间树高、胸径和材积均达到极显著差异水平,且两两生长性状均呈现极显著正相关,在武汉市九峰试验林场生长的优势的种源有‘江苏南京’和‘云南富宁’,而生长最差的种源是‘河南南阳’和‘河南商城’。枫香树高分别与经度和年降水量呈现显著正相关,且胸径和材积与年降水量呈显著正相关。不同种源枫香的萌动期、绽叶期、展叶期和落叶期等存在显著差异,处于低纬度的‘广西岑溪’和‘云南富宁’种源的萌动期、绽叶期、展叶始期、展叶盛期、落叶始期均较其他高纬度种源早,而落叶盛期和落叶末期又较其滞后。

Growth Traits and Phenology Rhythm of Liquidambar formosana Young Stand of Different Provenance

Ten provenances of Liquidambar formosana were collected from different regions and provinces and planted in Jiufeng Experimental Forest Farm of Hubei province.The indexes including tree height,diameter at breast height,and volume and phenology rhythm of 6-year-old young Forest were investigated.The results showed that the growth traits for tree height,diameter and volume among different provenances were extremely significant differences,and pairwise index showed a significant positive correlation.Provenances of ‘Jiangsu Nanjing’and ‘Henan Shangcheng’were advantage for growing in it.However,provenances of ‘Henan Nanyang’and ‘Henan Shangcheng’were worst growth condition.Tree height showed a significant positive correlation with latitude and annual rainfall,respectively,and diameter at breast height and volume was a significant positive correlation with annual rainfall.Budding period,magenta leaf stage,leaf-ex-pansion period and defoliation period of different provenance were significant differences,and budding period,magenta leaf stage,primary leaf-expansion period,exuberant leaf-expansion period and primary defoliation period of ‘Guangxi Cenxi’and ‘Yunnan Funing ’in low latitude advanced more than that of high latitude,while exuberant defoliation period and telophase defoliation period were lagging behind.