落叶松冠下造林密度对红松幼树生长量的影响

在凤城宝山林场45年生日本落叶松冠下,研究营造红松果材兼用林的适宜密度,结果表明:以冠下4m×5m和带状5m×5m造林密度对树高生长量影响最大。适宜的造林密度有利于幼树的生长,防止由于过密而产生的偏冠现象,3年平均树高生长量较对照1.5m×1.5m提高21.8%~58.4.8%。

Effect of Planting Density under Crown of Larix kaempferi on Growth of Young Saplings of Pinus koraiensis

Optimal density of silviculturing fruit-timber of Larixkaempferi were studied by adopting three kinds of afforestation densities under 45-year-old Larixkaempferi in Baoshan Forest Farm of Fengcheng City.The afforest-ation densities (4 m × 5 m & 5 m × 5 m)have the great effects on growth of tree height,which prevent the phe-nomenon of deviation crown caused by too dense;the suitable planting density is conducive to the growth of young forest;3-year-old mean height growth increase by 21.8%-58.48% compared to the control (1.5 m × 1.5 m).