华北落叶松半同胞家系不同区域生长规律研究

Regional experiment selection of half-sib family fromLarix principis-rupprechtii

通过华北落叶松半同胞家系不同区域的栽培试验,对栽植1a、2a后的苗木成活率及7a后的苗木生长量因子(胸径、树高、冠幅)等进行调查,结果表明:相同家系在不同的试验区内,其苗木成活率存在较大差异,同一区域各家系则存在较小差异;相同家系在不同的试验区内,其生长量存在较大差异,同一区域内各家系生长量也存在较大差异;在山西省的关帝山和河北省的围场表现相近,平均成活率分别为82%和85%,而在辽宁省的清原县表现较差,平均成活率仅为57%,说明华北落叶松的生长性状及抗逆性在不同区域存在较大差异。

Half-sib family of Larix principis-rupprechtii was planted in different areas. Its survival rates were investigated one and two years after planting respectively. Its growth indices （DBH, height and crown diameter） were surveyed. Results showed that survival rates of plants from same family had big differences in different areas and small differences in same areas. Obvious differences had been discovered in the growth of same family in different and same areas. Plants from Guandishan of Shanxi Province, similar to those from Weichang of Hebei Province, were better than those from Qingyuan of Liaoning Province. It can be concluded that growth traits and hardiness of L. principis-rupprechtii has large differences in different areas. The experiment will give a reference to promoting good seed of L. principis-rupprechtii.