种植密度对油松幼苗生长的影响

Effect of Planting Density on the Growth of Pinus tabulaeformis Seedlings

以油松作为研究对象,设置4种栽培密度(50 cm×50 cm,50 cm×80 cm,80 cm×80 cm和80 cm×100 cm),研究不同种植密度对油松幼苗生长、根系发育、干物质积累和幼苗质量的影响,其结果表明:种植密度的降低,有利于促进油松幼苗的生长、根系发育和干物质的积累,并以80 cm×100 cm密度条件下效果最佳。与50 cm×50 cm密度相比,冠幅增加了21.79%、根表面积增加了50.67%、根体积增加了33.33%,总干重增加了18.58%,差异显著,同时显著增加了油松幼苗的株高、地径,促进了根系了发育,提高了根冠比和壮苗指数,可应用于油松幼苗培育,适宜当地造林。

In order to explore the effect of planting density on the growth of forest tree seedlings,the experiment took Pinus tabulaeformis as the research object and set 4 planting densities(50 cm×50 cm,50 cm×80 cm,80 cm×80 cm and 80 cm×100 cm)to study the effect of different planting densities The influence of Pinus tabulaeformis seedling growth,root development,dry matter accumulation and seedling quality.The results of the study showed that the reduction of planting density is more conducive to promoting the growth of Pinus tabulaeformis seedlings,root development and dry matter accumulation,and the best effect is under the condition of 80 cm×100 cm density.Compared with the 50 cm×50 cm treatment,the crown width increased by 21.79%,the root surface area increased by 50.67%,the root volume increased by 33.33%,and the total dry weight increased by 18.58%.The difference was significant,and the plant height of the Pinus tabulaeformis seedlings was significantly increased.The ground diameter promotes the development of the root system,improves the root-to-shoot ratio and the strong seedling index.It can be applied to the cultivation of Pinus tabulaeformis seedlings and is suitable for local afforestation.