对8年生不同造林密度杉木林分的生长效应进行造林试验研究,结果表明:不同造林密度对杉木林分的胸径、树高、冠幅及材积生长差异及显著.不同造林密度对杉木林分生长的影响表现为:8年生时杉木林分的蓄积量与造林密度的大小成正相关,密度越大,林木的分化越早,影响后期杉木的生长.因此,合理的造林密度对林分正常生长发育尤为重要.通过对杉木4个不同造林密度进行分析,以1600株/hm2为最好.%This paper studied the growth effect on the different planting density of Cunninghamia lanceolata with 8 years old.The result showed that there were significant differences in the DBH, tree height, crown breadth and volume growth on afforestation density of Cunninghamia lanceolata.The different afforestation density is as follows.The accumulation of Cunninghamia lanceolata with 8 years old is positively correlated with the size of its afforestation density.The higher the density, the earlier the differentiation of trees, which will affected its growth in late stage.Therefore, the reasonable planting density on the stand is particularly important to the normal growth and development.In this experiment, four different planting afforestation densities were analyzed to explored Cunninghamia lanceolata.The best result can be obtained when the density is 1600 plants/hm2.
展开▼
