摘要
华北落叶松是分布在高海拔的优良用材树种,近年来在河北省北部低海拔地区营造的华北落叶松人工林,生长良好,展示了推广前景。但在低海拔地区,夏季气候干热,播种育苗的幼苗封顶现象严重,以致影响苗木产量和质量。本文对华北落叶松幼苗封顶的特征、危害和发生规律进行了初步探讨,并提出了防治封顶的综合技术措施。
Larix principis-rupprechtii Mayr is a good tree species for timber growing usually in elevation regions. However, in the low elevation regions of North Hebei province, its young plantations grow very well and show prospects for popularizing.Because the binding of its seedlings is a big problem, the quality and quantity of seedlings are affected.In the paper, the symptoms, harmfulness and occurence of binding of the tree seedlings are described, and the comprehensive control measures are given in the mean time
关键词
落叶松
播种育苗
幼苗封顶
华北
Larix principis-rupprechtii Mayr
seedling
binding of seedling
