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.

Key words: Pinus massoniana, Pulpwood, Management model system, Optimum cultivation pattern, Biomass