4个红椿地理种源生长差异分析

Growth Difference Analysis of 4 Different Provenances of Toona ciliata in Wuhan

摘要:

红椿是中国珍贵乡土速生用材树种。为了研究红椿不同种源在武汉地区的适应性和生长差异，对4个红椿地理种源苗期、6 a生幼林树叶片及其生长量性状进行了观测与分析。结果表明，同一种源红椿叶片的复叶长、复叶宽、小叶长、小叶宽、小叶数这5个指标性状，6 a生幼林树的观测值皆大于苗期的观测值。苗期时不同种源间复叶长、复叶宽、小叶长、小叶宽、小叶数、复叶长宽比、小叶长宽比这7个叶片性状皆存在极显著差异；除小叶长外，红椿6 a生幼林树不同种源其他性状指标之间存在显著或极显著差异；不同种源间不同林龄红椿生长量指标之间也均存在极显著差异，且随着林龄的增加红椿不同种源生长量之间差异也随之增大。4个种源6 a生红椿生长量排序为福建来舟（LZ）>福建武夷山（WY）>江西井冈山（GS）>江西官山（JG）。相关性分析结果表明，苗期的叶片性状间相关显著性较高，6 a生幼林树的叶片性状间除极个别性状表现出显著相关外，大部分性状间相关不显著。

Abstract:

Toona ciliata is one kind of native precious fast-growing timber species in China. In order to study adaptability and growth differences of different T. ciliata provenances in Wuhan, the leaf traits of seedling stage and 6-year-old after afforestation stage, and different age growth traits of 4 different Toona ciliata Provenances were observed and analyzed. The results showed that the compound leaf length, compound leaf width, leaflet length, leaflet width and leaflet number, these 5 direct observed values of leaf traits of the same provenance in the forest stage were greater than those in the seedling stage. There were extremely significant differences in the 7 leaf traits among different provenances in the seedling stage, the 7 leaf traits included compound leaf length, compound leaf width, leaflet length, leaflet width and leaflet number, the ratio of compound leaf length-width, the ratio of leaflet length-width. In 6-year-old forest stage, there were extremely significant or significant differences in other traits among different provenances except the small leaf length trait. There were extremely significant differences in the growth values of different forest ages among different provenances, and the growth differences among different provenances increased with the increase of forest age. The rank of the 4 provenances based on the 6-year-old growth traits was LZ > WY > GS > JG. The results of correlation analysis showed that the correlation between leaf traits at seedling stage was more significant than that at 6-year-old forest stage. The correlation between most traits at 6-year-old forest stage was not significant except for a few traits.