贵州马尾松建筑材林优化栽培模式研究

A STUDY ON OPTIMUM CULTIVATION PATTERNS OF BUILDING TIMBER PLANTATION FOR MASSON PINE IN GUIZHOU

在建立生长收获模型系统基础上 ,通过对立地、种源、整地、施肥、间伐等对生长影响的研究 ,建立了马尾松人工林经营模型系统。根据培育目标 ,用经营模型对众多营林方案的采伐年龄和经济结果逐一进行了优化和比较 ,为不同指数级选出了优化栽培模式。结果表明 :按优化栽培模式经营大、中、小径材 ,可比现行采伐年龄分别缩短 4～ 6年、9～ 1 2年、8～ 1 2年 ;内部收益率分别比常规模式提高 1 6～ 2 8、1 8～ 4 1、2 1～ 4 0个百分点 ,净现值分别增加 1 30 0～ 2 790、2 0 0 9～ 34 47、1 1 37～ 31 6 8元 /hm2 ;优化模式的内部收益率均大于 1 2 %。培育建筑材 ,高初植密度并不能取得高收益 ,合理间伐可提高经济效益。主要模型均通过了显著性检验和残差分析 。

Based on setting up the model system of growth and yield, management model system of Masson pine plantation was established by studying the effects of site, provenance, site preparation, fertilization, and thinning on stand growth. According to cultivation objectives, cutting age and economic evaluation result of multitudinous silvicuture schem were optimized and compared one by one using the management model, then optimum cultivation patterns for different site indexes were obtained. The results showed that cultivating large timber, middle wood and small logs by the optimum cultivation patterns, their cutting age were respectively shorter 4～6a, 9～12a, 8～12a than those being used at present. \%IRR\% was respectively raised 1.6%～2.8%, 1.8%～4.1%, 2.1%～4.0% than those of conventional cultivation patterns. \%NPV\% was respectively increased 1300～2790, 2009～3447, 1137～3168 yuan\5hm\+\{-2\}. \%IRR\% of optimum cultivation patterns were more than 12%. To cultivating building timber, high planting density does not make good economic benefit, and rational thinning may raise economic benefit. The main models were significance at levels of 5% and 1%, by using \%F-\% test and residual error analysis, so management model system and optimum cultivation patterns may be used in study area.