不同地理种源南京椴个体生长规律

Growth Regularity of Tilia miqueliana at Different Provenance

采用目标种取样法,在宝华山自然保护区、皇藏峪自然保护区和牛首山森林公园内选取椴树较为集中的地段设置样地,运用解析木分析方法,分别从树高、胸径、材积3个方面揭示南京椴个体生长规律,并分析不同地理种源南京椴个体生长规律的差异。结果表明:(1)南京椴树高生长速生期和成熟期早于胸径和材积生长,树高生长在30 a左右达到成熟期,而材积生长在60 a内并未进入成熟期;(2)3个地理种源南京椴个体生长存在一定差异,其中安徽皇藏峪南京椴速生期生长量高于其它2个地理种源,而材积生长的成熟期晚于其它2个地理种源。研究结果可为南京椴用材林的栽培及抚育管理提供参考。

In this paper, sample plots were established by target species sampling method at concentrated distribution area in the three different populations （ Huangeangyu nature preserve in Anhui Province, Baohua mountain nature preserve in Jiangsu Province, Niushou mountain scenic area）. The growth regularity of Tilia miqueliana was revealed by stem analysis. Meanwhile, height, growth differences of DBH （diameter at breast height） and volume in the above three populations were studied. It is revealed that ①the height fast growing period and mature ages of Tilia miqueliana were earlier than DBH and volume growth. The height mature age is about at 30 years old, while the volume is still in fast growing period at 60 years old ②the growth rhythm of Tilia miqueliana in the above three geographical provenances are different. The height increment of Tilia miqueliana at fast-growing period in Huangcangyu nature preserve was higher and the mature age of volume was later （60 a） than another two provenances. The research preliminarily revealed growth regularity,fast-growing period and mature age of Tilia miqueliana. It provided a strong foundation for culture tech- nique and management of Tilia miqueliana.