摘要
通过多年的试验表明 ,红松不同的造林密度 ,造林投入成本不同。造林密度大不仅造林成本高 ,而且初次透光抚育时间提前 ,经济效益低。造林后 2 0a ,每公顷 4 4 44株与每公顷 3330株的造林密度林分相比 ,胸径、树高、蓄积生长量差异不显著。一般红松造林以每公顷 3330株的密度为宜 ,在立地条件好、交通便利的地块 ,适宜每公顷 2 50 0株的造林密度 。
This paper deals with proper density of Pinus koraiensis.Plantation density is highly related with input-output rate of forest construction.In a plantation of 20 years,the average DBH and height,volume growth have little difference between 4 444 stems per hectare and 3 330 stems per hactare.Results show that proper planting density of common plantation is 3 330 stems per hactare, while in site with high productivity and easy transportation,the best choice is agroforestry,the density of trees is 2 500 stems per hectare.
出处
《辽宁林业科技》
2000年第5期10-11,共2页
Liaoning Forestry Science and Technology
