引种南林3412杨与滇杨苗期生长比较

Seedlings Growth Comparison between Introduced Populus deltiodes cv.“3412” and P. yunnanensis

以引种的南林3412杨和滇杨扦插苗为对象,比较分析2种杨树的生长表现。结果表明,2种杨树的年生长节律基本一致,表现为7—8月苗木生长快速,自9月起,苗木高生长与粗生长均减缓。10月中旬落叶时,南林3412杨苗粗和苗高分别为35.95 mm和438.89 cm,均高于滇杨(苗粗29.53 mm,苗高363.50 cm),但苗粗差异不显著,苗高差异达显著水平。表明南林3412杨在昆明地区具有较好的适应性和速生性,具有较强的推广应用潜力。

This paper select Populus deltiodes cv. ＂3412＂ and native P. yunnanensis, as study objective, and compare growth performances of the two poplar species. The result showed that the annual growth rhythm of two poplar species were accordance, the seedlings were growing faster in July and August, and the girth growth and height growth were both slowing down in September. The seedling girth and height of P. deltiodes cv. ＂3412＂ were 35.95 mm and 438.89 cm respectively, which were higher than them of P. yunnanensis （seedling girth of 29.53 mm and seedling height of 363.50 cm） at fallen leaves in mid October. However, the difference of seedling girth was not significant, and the seedling height difference was significant between the two poplar species. Above all, P. deltiodes cv. ＂3412＂ has good adaptability and fast growth in Kunming, and it also has strong potential for popularization and ap plication.