论文部分内容阅读
种子是育苗造林的物质基础。为了“绿化祖国”,实现造林“三自”方针,66年夏天,我们进行落叶松人工幼林改造培育为母树林的试点工作。目前,“后备母树”长势良好,枝冠开扩,生育旺盛。平均胸径16.8公分,树高13公尺,冠幅5.5×5.6公尺,枝下高1.5公尺左右。有部分林木结果。对照地林木则径细冠小,平均胸径9.5公分,树高13公尺,冠幅2.5×3.2公尺,枝下高2.0～3.0公尺,未见结实。
Seed is the material basis for nursery afforestation. In order to “green the motherland” and realize the principle of “three self-reforestation” of afforestation, in the summer of 66, we carried out experimental work of reforestation and cultivation of larch artificial young trees for the mother trees. At present, the “reserve tree” is in good condition with branches and branches expanding and fertility. The average diameter at breast height is 16.8 cm, the tree height is 13 meters, the crown width is 5.5 × 5.6 meters and the branch height is about 1.5 meters. Some trees result. In contrast, the forest was smaller in diameter, with an average breast diameter of 9.5 cm, a tree height of 13 m, a crown width of 2.5 × 3.2 m, and a branch height of 2.0 to 3.0 m.