克拉玛依地区银密杨生长规律研究

Study on the Growth Regulation of Populus alba L. × Populus talassica in Karamay

研究修枝措施下9 a生银密杨的生长状况,为克拉玛依地区培育干形圆满的优质木材提供理论支持.在同一修枝强度(即弱度修枝)下,选取3株杨树优势木,按照树干解析的步骤,截取圆盘获得各个龄阶的树高、胸径、材积等数据.在整个生长季,杨树的胸径、树高和材积的总生长量始终保持较快的增长;它的平均生长量较平缓,但连年生长量较迅速.杨树材积生长量未出现峰值,平均生长量和连年生长量没有相交,还未达到数量成熟龄.银密杨的干形稳定,说明当地环境适合其生长.

Through the study of the growth status of 9a Populus （Populus alba L. x P. talassica） under the pruning measures, which provides theoretical basis for Karamay to cultive stem form high-quality wood. In the same pruning intensities （i. e. weak pruning ）, selecting 3 strains of Populus, in accordance with stem analysis＇ steps,interception of disc to obtain each age segment data of trees height, DBH, volume. In the whole growth season, the total increment of height, DBH, volume maintains rapidder growth. The mean annual increment is slow, but the current annual increment is quickly. The Populus increment of volume does not appear peak, the mean annual increment and the current annual increment are not intersect, it dosen＇ t achieve the age of quantitative maturity. The results show that the trunk of Populus is straight, the local environment suitable for their growth.