8203号杨生长规律的初步研究

８２０３号杨系雌株，树冠较一般杨树窄。在东部山区能够完成正常的生育周期，物候期与大青杨相近。苗期生长高峰期主要为６月中旬到７月下旬。胸径生长３￣７ａ为加速阶段，８－１４ａ为稳定生长阶段；树高生长最快时期为４－９ａ；现阶段材积生长始终处于加速期。８２０３号适宜营造短周期工业用材林，也是培育大经有材种的优良树种。

Preliminary study on 8203 Poplar's growth rhythm

th poplar female plant crown is narrow than other poplar plant's Th normal growth period can be finished at east mountain district The phonology period of 8203th poplar and are alike ,From the middle of June to the end of July was the 8203th poplar main growth pick hour of seedling stage , Direct growth is accelerating stage from third year to seventh year ,and eighth year to fourteenth year is normal growth stage ;From fourth year to ninth year is the height growth pick hour ;Now the volume keep accelerating period 8203th poplar suit to plant the short -term industry timber stand , and big timber assortment