摘要
为满足竹材加工企业对大径级、长枝下高、小尖削度优质原条竹不断增长的大量需求,实施了以立地条件选择、林分结构调控和林地土壤管理等为核心技术的毛竹工业用竹材林高效定向培育技术措施,通过3 a来3种类型示范基地竹林的技术效果调查分析,结果表明:林分结构显著改善,毛竹纯林、竹杉混交林、竹阔混交林立竹度、新竹平均胸径较对照分别增加41.2%、35.7%、38.6%,9.4%、11.3%、8.4%,立竹整齐度、均匀度分别达7以上和6以上;竹材质量显著提高,毛竹纯林、竹杉混交林、竹阔混交林立竹枝下高、全高、胸高壁厚分别较对照增大5.5%、6.2%、5.3N,6.2%、5.6%、10.2%,3.4%、11.1%、9.9%,尖削度值均为0.4以上,立竹尖削程度下降;技术增产效果显著,毛竹纯林、竹杉混交、竹阔混交林竹材、竹笋产量分别较对照增产82.6%、76.7%、47.7%,24.4%、22.2%、38.1%.
Abstract
In order to meet the industrial need for high quality bamboos of large-diameter, high first-branch-height, small-taper, many measures such as screening bamboo stands, adjusting of bamboo forest structure and ameliorating stands soil were carried out. Based on the investigation in three types of demonstration bases in three years,the results showed that bamboo forest structure was improved remarkably under all treatments. The mean diameter of new bamboo and stand density of pure Moso forest, mixed forest of Moso and Cunninghamia lanceolata and mixed forest of Moso and broad-leaved trees were increased by 41.2%, 35.7%, 38.6% and 9.4%, 11.3%, 8. 4% respectively in comparison with that of control. Uniformity and eveness of bamboo exceeded 7 and 6 respectively. Wood properties increased remarkably. The total height and first branch height wall thickness at DBH of pure Moso forest, mixed forest of Moso and Cunninghamia lanceolata and mixed forest of Moso and broad-leaved trees were increased by 5.5%, 6.2%, 5.3%; 6.2%, 5.6%, 10.2% and 3.4%, 11.1%, 9. 9% respectively in comparison with that of control. The taper decreased gradually. The production of pure Moso forest, mixed forest Moso and Cunninghamia lanceolata and mixed forest of Moso and broad-leaved trees were increased by 82. 6%, 76. 7%,47. 7% and 24. 4% ,22. 2% ,38.1% respectively in comparison with that of control.
基金项目
国家林业局林业科技成果推广项目([2004]-36-2)
NETL
NSTL
维普
万方数据