摘要
通过对大、小兴安岭6块天然兴安落叶松(Lirix gmelinii)林18株解析木的研究表明:兴安落叶松不同地点、之间在生长性状上有差异.兴安落叶松天然林树高、胸径和材积的变异随年龄的增大而减小,25a(大兴安岭)和12a(小兴安岭).是生长变异曲剧烈分化到稳定的转折年龄,此时树高和胸径与晚期材积的相关性达到极显著水平、选择效率也达最高,所以25a(大兴安岭)和12a(小兴安岭)是兴安落叶松早期选择的最佳年龄.早期选择应以树高为主要指标、胸径为辅助指标.可用25a(大兴安岭)和12a(小兴安岭)时的树高和胸径预测36年生时的材积.
Growth variation and selection of Larix gmelinii were studied on the basis ofanalysis of 18 trees from six natural forest stands of Daxing'an Mountains andXiaoxing'an Mountains. The results showed that the Larix gmelinii has differencein growth characteristics among provenances. The growth variations of height,diameter and volume of Larix gmelinii are very acute in the early days, and aftertwelve (Xiaoxing'an Mountains) or twenty-five (Daxing'an Mountains), it becamesmore morderate. At the age of 12 or 25 the juvenile-mature correlations ofheight, diameter and volume are singificant, and the selection effciency value washighest. So the age of 12 is the best early selection age for Larix gmelinii ofXiaoxing'an Mountains, and 25 is the best age of for L. gmelinii in Daxing'anMountains. Height is a major factor of early selection, and diameter is the minorfactor. According to the height and diameter at age of 12 (Xiaoxing'anMountains) or age of 25 (Daxing'an Mountains), the volume of mature couldbe estimated.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1996年第5期6-11,共6页
Journal of Northeast Forestry University
基金
黑龙江省自然科学基金资助课题
关键词
早期选择
兴安落叶松
生长变异
Larix gmelinii
Early selection
Juvenile-mature correlations
Growth variation
Selection efficiency
