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对龙江县错海林场11年生长白落叶松11个种源和10年生兴安落 叶松17个种源试验林进行观察研究,结果表明:各种源主要生长性状遗传分化明 显,遗传变异稳定,种源生长早晚期高度相关,4～5年可作为种源早期选择的初选 年龄;种源地理变异,长白落叶松是以经度为主要变异方向。兴安落叶松则是以 经度、纬度、海拔为主要的三重渐变;分别将长白和兴安落叶松种源划分三个类型, 即速生丰产型、中等类型和慢生低产型;选出优良种源,长白为大海林、白刀山和 小北湖三个,11年生时,树高、胸径和材积可分别获得11.2％、15.5％和38.5％ 的遗传增益。兴安选出优良种源两个,即友好和乌伊岭种源,10年生时,树高、胸 径和材积可分别获得14.6％、30.3％和77.4％的遗传增益。
Eleven-year-old Larix olgensis plantation and 17-year-old Larix gmelinii plantations in Erhaihai Farm, Longjiang County were observed and studied. The results showed that the main growth traits of all provenances were well differentiated and the genetic variation was stable. Early and late growth of the source is highly correlated, and 4 ~ 5 years can be used as the primary selection age of early selection of provenances. Geographical variation of provenances, longitude larch is longitude as the main variation direction. Larix gmelinii is the longitude, latitude and altitude as the main triple gradient; respectively Changbai and Xing’an larch provenance divided into three types, namely fast-growing high-yield type, moderate type and slow-growing low-yield type; selected good provenance, Changbai was Dahailin, Baodaishan and Xiaobeihu. At eleven years old, tree height, DBH and volume gain genetic gains of 11.2%, 15.5% and 38.5% respectively. Xing’an selected two provenances, namely, the friendly and Wuyiling provenances. At 10 years of age, the tree height, breast diameter and volume gain genetic gains of 14.6%, 30.3% and 77.4%, respectively.