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刚松(萌芽松)Pinus rigida Mill原产美国。我国的辽宁、江苏、山东等省均有分布。此树种具有抗松干蚧和耐瘠薄的优良特性。为了能充分地利用刚松的这种特性,现将其生物学、生态学及林学特性和繁殖技术介绍如下,供参考。一、形态特征刚松是常绿乔木,树皮赤褐或灰褐色,成鳞片状纵裂;树干及枝有大量不定芽发生,故有萌芽松之称;叶三针一束,单叶内有较明显的粗棱线并微扭转,叶长9厘米左右;球花单
Just loose (sprouting pine) Pinus rigida Mill origin of the United States. China’s Liaoning, Jiangsu, Shandong and other provinces are distributed. This tree species has excellent resistance to dry scales and barren. In order to make full use of the characteristics of fresh pine, its biological, ecological and forest characteristics and breeding techniques are introduced below for reference. First, the morphological characteristics Just loose is an evergreen tree, bark auburn or taupe, scale-like longitudinal split; trunk and branches have a large number of adventitious buds, it is sprouting pine said; There are more obvious ridgeline and micro twist, leaf length 9 cm; ball flower single