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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 ,所建经营模型系统和选出的优化栽培模式可在研究区内应用
Based on the establishment of the system of growth and harvesting model, the establishment of a plantation management system of Pinus massoniana plantation was studied by studying the effects of site growth, provenance, soil preparation, fertilization and thinning on growth. According to the cultivation goal, the operating model was used to optimize and compare the harvest ages and economic results of many forest management programs one by one, and optimize the cultivation mode for different index levels. The results showed that the operating ages of large, medium and small-diameter timber according to the optimal cultivation mode were 4 ~ 6 years, 9 ~ 12 years and 8 ~ 12 years respectively than the current harvesting ages. The internal rate of return increased by 16 ~ 2 8,1 8 ~ 4 1,2 1 ~ 4 0 percentage points, the net present value increased by 130 ~ 2,790,2 0 0 9 ~ 34 47,1 1 37 ~ 31 6 8 yuan / hm 2, respectively; Internal rate of return is greater than 12%. Cultivate building materials, high planting density and can not get high yields, reasonable thinning can increase economic efficiency. The main models all passed the significance test and residual analysis. The established business model system and the selected optimized cultivation mode can be applied in the study area