华北落叶松不同种源苗期生长动态比较

Growth dynamics of Larix pricipis-rupprechtii seedlings from different provenances

为了解种源间的生长特性,调查分析了华北落叶松25份种源的2a生苗高和地径生长动态,结果表明:华北落叶松种源间苗高和地径年生长量均存在显著差异,具有很大的改良潜力;种源24、7、2和20的苗高年生长量均大于20cm,种源7和2的地径年生长量均大于2.9mm;综合评价苗期生长情况,华北落叶松种源2、21、24、7和15表现优良。

Larix pricipis-rupprechtii is one of the most important forest species in northern China, and this species from different geographic provenances had different growth characteristics due to long-term influence of natural environment. In order to understand the growth differences among various Larix pricipis-rupprechtii provenances, height and basal diameter dynamic growth of 2 a seedlings from 25 provenances of Larix pricipis-rupprechtii were investigated. Results showed that the seedling height and basal diameter were both significant among 25 provenances. The fastest annual growth of its seedling height （〉20 cm） and basal diameter （〉2.9 mm） were found in provenances 24, 7, 2, 20 and 7, 2, respectively. The comprehensive evaluation of seedling growth showed the provenances 2, 21 and 24 of Larix pricipis-rupprechtii were better than the others.