麻竹笋用林林分结构优化模式研究

A Study on the Optimized Mode of Forest Structure of Dendrocalamus latiflorus for Bamboo Shoot

以麻竹笋用林优质高效为目标,在林分结构主导因子与竹笋经济性状关系研究基础上,趋势面法构建丰产林分结构模式.研究表明:丛立竹数与出笋数呈线性增长规律,与笋个体质量和规格笋比例显著相关,6株以下时,笋个体质量随立竹数增加而增加,9株及以上时,笋个体质量和规格笋比例显著下降;立竹胸径与笋个体质量呈线性增长趋势,与丛出笋数无显著相关;丰产林分结构模式为丛立竹数5～7株,立竹胸径5～6cm,立竹年龄3年以下,1～2龄立竹各占50%.模式增产效果好,低产林分实施后次年可增产竹笋63.5%,规格笋比例提高12.9%.

Aiming at high quality and benefit of Dendrocalamus latiflorus for bamboo shoot, based on the study of relations among main factors of forest structure and economical characters of bamboo shoot, a high-yielding forest structure was established by trend face measure. The results showed that there is a linear increasing law between cluster bamboo stalks and shoot number, notable relation with unit shoot weight and standard shoot proportion, unit shoot weight increases with cluster bamboo stalks when under 6 stalks, but unit shoot weight and standard shoot proportion declines notably when over 9 stalks; diameter at breast height(DBH) increases linearly with unit shoot weight, but no notable relation with shoot number; the mode of high-yielding forest structure is: cluster bamboo stalks 5~7,DBH 5~6 cm,stalk year under 3, one year and two years stalk proportion 50%. The mode has a good effect on increasing production,the shoot output increases by 63.5% and the standard shoot proportion increases by 12.9%,one year after the implementation of the mode.