【摘要】 在分带建立生长收获模型、经营模型的基础上 ,依据经营模型系统和各带的技术经济指标 ,采用动态经济评价的方法 ,为各带、主要立地指数分别选出 1～ 2种 (共选出 2 3种 )优化栽培模式 ,每种模式中包括了18种技术组合。优化模式缩短采伐年龄 10～ 18a ,内部收益率提高 4～ 9个百分点 ,具有整体经济效益最优性。该优化栽培模式的造林密度 (310 0～ 4 5 0 0株·hm2 )和采伐时密度 (2 10 0～ 32 0 0株·hm2 )均明显高于建筑材林 ,轮伐期一般比建筑材林短 6～ 13a ,纸浆材林只需间伐 1次或不间伐。优化栽培模式的主要技术组合是 :适当密植 ,中块状整地 ,北、中带第 1年抚育 1次 ,第 2、3年各抚育 2次 ,南带第 1、2年每年抚育 2次 ,第 3年抚育 1次 ,14以上立地指数级不施肥 ,选用优良种源或家系 ,中等强度间伐 1次或不间伐 ,适时早伐更多还原

【Abstract】 Based on setting up the model system of growth yield and management,according to management model system and technological economic guidelines of different distribution zone,the optimum cultivation patterns(total 23 patterns)of different zone and site index(every site index had 1～2 patterns)were obtained by using method of dynamic economic eveluation.Each pattern included 18 technology combination.Cutting age of the optimum cultivation patterns were 10～18?a shorter than that being used at present,their IRR were respectively raised 4～9 percent point than conventional cultivation patterns.Compared with building timber stands,planting density (3 100～4 500 tree·hm -2 ) and harvest cutting density( 2 100 ～3 200 tree·hm -2 ) of the optimum cultivation patterns for pulpwood stand were bigger and their cutting age were shorter 6～13?a with only one thinning or no thinning.Main technology combination of the optimum cultivation patterns were increasing suitably planting density,using middle spot soil preparation,in the north and middle zone first year tending one,the second and third year tending two every year,in the south zone the first and second year tending two every year,the third year tending one,above 14 site index no fertilizing,choosing provenances and families for planting,thinning one or no thinning,and early cutting suitably.更多还原