【摘要】 本文介绍了齿叶山杨、响叶杨、毛白杨、山杨在长江中游丘陵岗地的物候期、林木高生长节律。调查了造林成活率、12 a 生林木保存率、速生性及林分的抗病抗虫性。研究了小×大叶杨、齿叶山杨杂交种(株系)在高海拔(1 500 m)地区的抗病性和速生性。更多还原

【Abstract】 The paper introduced phenological period and height growth rhythm of Populus serrata T·B chao J·Schan.sp nor、Populus adenopoaa、Populus tometosa、Populus davidiana in hill of middle reaches of Changjiang River.Investigated survival rate of afforestation、tree conservancy rate of 12—year—old、fasting growing、resistance to disease and pest.And it also studied on resistance to disease and fast—growing for Populus simonii×Populus lasiocarpa、half—bred of Populus serrata T·B chao J·Schan at elevation area a- bove 1 500 m.更多还原