辽西地区山杏林分栽植密度效应的分析

Analysis of Density Effect of Armeniaca sibirica Forests in Western Region of Liaoning Province

以辽西地区山杏林地为研究对象，利用方差分析及多重比较的方法比较不同密度条件下山杏林生长状况和改土效益的差异，从而得出不同林龄山杏林最佳的栽植密度。辽西地区山杏林在幼龄期和盛果初期密度为2m×2m时经济效益最好，对于进入30年生的盛果期林分，密度为3m×4m时经济效益最高；20年生山杏林密度为2m×2m时改土效果最好；树体生长发育在10年生以前以2m×2m的密度栽植最好，20×30年生以2reX3m的密度栽植最佳.

Taken Armeniaca sibirica forests in western region of Liaoning province as research objects, growth status and soil amelioration effect of Armeniaca siln＇rica forests under the condition of different densities were compared by the means of variance analysis and multiple comparison, and the optimum planting density of Armeniaca sibirica forests at different ages were chosen. Economic benefits of forests at young and early fruit periods were higher at the density of 2 m×2 m, and that of over 30-year-old forests at full fruit period were higher at the density of 3 m×4 m than any other densities. The soil amelioration effects of forest at 20 years old were better at the density of 2 m× 2 m than any other densities. The growth status of forest before 10 years old were better at the density of 2 m × 2 m, and that of forest at 20×30 years old were better at the density of 3 m×4 m than any other density.