不同立地类型和经营措施版纳甜龙竹造林成效的比较研究

通过对版纳甜龙竹在不同立地条件,以不同经营方式的造林成活率、各年度成竹数、胸径和株高生长量以及3年生时地上部分各器官生物量的比较研究。结果表明,立地类型和经营方式与成活率和造林初期的生长关系十分密切。沟谷和坡下部的成活率和造林初期的胸径和株高的生长以及3年生时地上部分各器官生物量明显高于坡上部和坡中上部,集约经营的成活率和造林初期的胸径和株高的生长以及3年生时地上部分各器官生物量明显高于一般经营和一般管理。因此,在版纳甜龙竹造林时,应尽量选择沟谷和坡下部的地块,在造林初期应加强除草和肥水管理,这对于提高成活率、促进成竹数、胸径和株高的生长以及提高秆的生物量有重要意义。

A Comparison Study of Different Sites and Management Types on Growth Performance of Dendrocalamus hamiltonii Nees et Arn. ex Munro

A study on the silvicultural management techniques for edible and pulp bamboo of Dendrocalamus hamiltonii in the mountain area in Xishuangbannan was carried out.The survival percent,grown bamboo percent,individual number of new bamboo,diameter of breast height(DBH),height and the biomass of various organs above ground were tested and analyzed after planting in 1-3a,and the relationships between the growth of stand at initial affforestry stage and the site types and management types was discussed.The resultsshowed that the growth of stand is closely related with the site types and the management types.The ravine and bottom of slope are most suitable for the growth of D.hamiltonii,its survival percent,grown bamboo percent,individual number of new bamboo,DBH,height and the biomass of various organs at the age of 3 years are better than those on the middle slope and above-middle slope.Meantime,their survival percent;grown bamboo percent and growing performance are different under different management types.The intensive management is better than common management.So,we should select the ravine and bottom of slope area for D.hamiltonii afforestry,and the management in irrigation and fertilization at the initial affforestry stage should be strengthened,so as to improve the survival percent and grown bamboo percent,accelerate the growth of various organs and increase the biomass.