栽植密度对北美红栎幼苗生长影响及评价

Effects of planting density on growth of Quercus rubra seedlings

以4种栽植密度[株行距分别为A1(5 cm*5 cm)、A2(10 cm*10 cm)、A3(15 cm*15 cm)、A4(20 cm*20cm)]下的北美红栎幼苗为材料进行容器育苗对比试验,研究不同栽植密度下北美红栎容器苗苗高、地径生长和各生物量积累规律,利用相关性分析、主成分分析对北美红栎的栽植密度进行综合评价,结果表明:不同栽植密度对北美红栎容器苗生长影响差异显著,A4(20 cm*20 cm)组栽植密度的苗高、地径生长量以及各生物量表现值最大,说明其最有利于北美红栎容器苗生长。

By taking Quercus rubra container seedlings as the tested materials,with four kinds of planting density [A1（5 cm×5 cm）,A2（10 cm×10 cm）,A3（15×15 cm）,A4（20 cm×20 cm）],the comparative experiments of container seedlings were conducted. The growth and accumulation rhythm of height,diameter and biomass with different ratio of planting density were investigated,the effects of different planting density on Q. rubra container seedlings were comprehensively evaluated by adopting methods of correlation analysis,principal component analysis. The results show that different planting density had significant influence on north American red oak container seedling growth,the planting density group A4（20cm×20cm） presented the highest increment values of seedling height,ground diameter and each organs＇ biomass values,so A4 is the most suitable for north American red oak container seedling.