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详细介绍子午岭林区美国竹柳(Salix maiznokunggarensis)的引种培育情况,就美国竹柳平茬更新代次对其地上部分和地下部分生长的影响进行研究。结果表明:当年扦插苗和1次、2次平茬苗相比在苗高和地径生长量上基本没有变化。随着平茬次数的增多,美国竹柳苗木生长相对退化,苗木苗高和地径生长趋势减缓,在不平茬的情况下,美国竹柳苗高和地径随着苗木生长年限的增加而增加。平茬更新代次最好不超过2次。
This paper introduces the introduction and cultivation of American Salix maiznokunggarensis in the forest zone of Ziwuling area in detail and studies the influence of the regenerated generation of the American bamboo bamboo stubble on the growth of its aerial parts and underground parts. The results showed that there was almost no change in seedling height and diameter growth compared with the first and second stubble seedlings. With the increase of the number of stubble, the growth of American willow seedlings relative degenerated, seedling height and diameter growth slowed down in the case of stubble, the United States willow bamboo shoot height and diameter increased with the growth of seedlings increased . It is best not to replace stubble more than 2 times.