长白山南部的杨树造林技术

Planting Techniques of Populus Plantation in Southern Changbai Mauntains

在收集大量资料的基础上，采用对比试验的方法，对长白山南部杨树人工林营造过程中存在的主要问题即品种选育、适生立地条件和主要抚育技术措施进行了系统研究。结果表明：（１）不同杨树品种对气温要求不同，各小气候区应优先选择大青杨、香杨等乡土树种，慎重引进其它新品种；（２）杨树造林应优先选择低平地、沟谷、河滩等水肥条件好的立地条件；（３）除草、松土和施肥可以大大促进杨树人工林生长，平均树高增加１４５．４％～２７５．７％，径增加１５１．３％～２７２．０％。为扩大长白山南部杨树人工林资源培育提供了重要参考资料。

Key techniques for Populus planting in southorn Changhai Mountains such as species selection, suitable site and tending have been systematic studied by collecting a great deel of data and contrast trials. Results show: (1)Different species of populus needs different air temperature condition. Such native species as Populus ussuriensis and Populus suaveolens should be selected firstly in every microclimate region. (2)The most suitable site for Populus plantation is the flat, vally and bank of river, which have optimal water and fertilizer condition. (3)The increment of height and diameter can get significantly incraeed by grass removing, soil preparation and fertilization, 145.4%～275.7% for height incresing and 151.3%～272.0% for diameter. It provides an important base for cultivating the resource of Populus plantation in this district.