红豆树杉木混交林生长效果分析

三明莘口教学林场的 33年生红豆树和 31年生的杉木混交试验林的研究结果表明 :先种生长较慢的红豆树 ,后种杉木 ,缓和了种间关系 ,长期生长稳定 ,取得良好的效果。混交林平均蓄积量高达 474 5 4m3 ·hm-2 ,是红豆树纯林的 2 3倍。3种混交比例 ,以红豆树∶杉木为 1∶2的林分蓄积量最高 ;2∶1的林分蓄积量最低 ,但红豆树的蓄积量却最高。混交林中的红豆树平均树高、胸径明显大于红豆树纯林 ,而冠幅小于纯林 ,树干分叉高度大于纯林 ,说明红豆树杉木混交林能明显促进红豆树生长 ,并长成优质良材

The Growth Effect Analysis of the Mixed Forest of Ormosia hosiei and Cunninghamia lanceolata

The research results of the mixed experimental forest of 33 year old Ormosia hosiei and 31 year old Cunninghamia lanceolata indicate that planting O.hosiei whose growth is slower before planting C.lanceolata obtains good effects.The average stocking of the mixed forest is up to 474.54m 3 per hm 2,2.3times that of the pure forest of O.hosiei. As for three kinds of mixed proportion,the stand stocking of the proportion of 1 (O.hosiei) to 2 (C.lanceolata) is highest;and the stand stocking of the proportion of 2 (O.hosiei) to 1 (C.lanceolata) is lowest,but the stocking of O.hosiei is highest.