摘要
为探究栽培密度对落叶松人工林生长的影响,以兰州地区的落叶松人工林为研究对象,考察不同栽培密度下落叶松生长性状及环境状况的差异,探讨栽培密度对落叶松人工林生长的影响。结果显示,不同栽培密度下落叶松种树高、胸径、冠幅、郁闭度、枯落物厚度以及灌草盖度均受到显著影响。随着密度的增加,落叶松树高呈现出先增后降的趋势,处理3的树高最高为18.13 m;胸径呈现逐渐降低的趋势,处理1胸径最大为16.83 cm;冠幅呈现逐渐降低的趋势,这与胸径变化趋势相同,冠幅最大的为处理1(4.16 m),最小的为处理4(2.61 m);落叶松人工林郁闭度呈增加趋势,处理4的郁闭度最高为87.25%;枯落物厚度呈现逐渐增加的趋势,处理4枯落物厚度最大为8.36 cm;灌草盖度呈现出先增后降的趋势,处理3的落叶松灌草盖度最大为72.96%。
In order to explore the effects of cultivation density on the growth of Larix gmelinii plantations,the differences in growth characteristics and environmental conditions of Larix gmelinii plantations in Lanzhou area of Gansu Province were investigated under different cultivation densities,and the effects of cultivation density on the growth of Larix gmelinii plantations were discussed.The results showed that tree height,DBH,crown width,canopy density,litter thickness and shrub coverage of Larix gmelinii were significantly affected under different cultivation densities.With the increase of density,the height of the deciduous Larix gmelinii increased first and then decreased,and the height of the tree under treatment 3 was 18.13 m.The DBH decreased gradually,and the maximum DBH was 16.83 cm under treatment 1.The crown width showed a gradually decreasing trend,which was the same as the change trend of DBH.The crown width of treatment 1(4.16 m)was the largest,and that of treatment 4(2.61 m)was the smallest.The canopy closure of Larix gmelinii plantation showed an increasing trend,and the highest canopy closure was 87.25%under treatment 4.The litter thickness increased gradually,and the maximum litter thickness was 8.36cm under treatment 4.The shrub coverage of Larix gmelinii increased first and then decreased.The maximum shrub coverage of Larix gmelinii under treatment 3 was 72.96%.It provides theoretical basis for Larix gmelinii cultivation.
作者
王普
Wang Pu(Bailongjiang Forestry Ecological Monitoring,Investigation and Planning Institute of Gansu Province,Lanzhou 730030,Gansu,China)
出处
《农业技术与装备》
2024年第1期125-127,共3页
Agricultural Technology & Equipment
关键词
落叶松
人工林
栽培密度
生长状况
Larix gmelinii
cultivation density
plantation forest
growth condition
作者简介
王普(1993-),男,甘肃人,林业工程师,研究方向为林业。
