低劣立地条件对树种更新的影响  

Effects of Poor Site Conditions on Regeneration of Tree Species

作　　者：尤晓晓 

机构地区：[1]岫岩满族自治县林业局,辽宁鞍山114300

出　　处：《防护林科技》2015年第8期60-61,67,共3页Protection Forest Science and Technology

摘　　要：选择土壤含盐量、土层厚度、地下积水位、冲风口等4个因素对丹东岫岩区域的日本落叶松、红松在不同立地条件下的生长情况进行调查.结果表明日本落叶松在土壤含盐量较低（0.21%）的区域造林,生长表现最好,其胸径比其他2区（含盐量分别为0.12%和0.28%）高5%-10%,树高生长量高出4.4%-19.6%;表土层厚度〉10cm,更新效果较好;日本落叶松在常年积水的立地条件下,造林成活率为58%,5a后保存率为43%,列为重点更新对象;在主风口立地条件下,红松造林保存率为16%,比正常立地条件下低82个百分点,12年生树高生长量为0.13m,胸生长量为0.1cm,均比正常立地条件下低.Growth of Larix kaempferi & Pinus koraiensis under different site conditions was investigated by choosing soil salinity,soil thickness,underground water bit &tuyere in Xiuyan Region of Dandong City.Result shows that the growth of Larix kaempferi is optimal under lower soil salinity(0.21%);DBH of Larix kaempferi is 5%-10% higher than that of the other two areas(salt content being 0.12% and 0.28%,respectively);height growth of Larix kaempferi is 4.4%-19.6% higher than that of CK;the regeneration effect is optimal while the topsoil thickness> 10cm;the afforestation survival rate of Larix kaempferi is 58% under perennially waterlogged area,and the preservation rate is 43%five years later as a key regenerated objects;preservation rate of Pinus koraiensis is16% under the site condition of tuyere,and is 82%lower than that in normal site condition;the growth of height &DBH of 12-year-old Larix kaempferi is 0.13 m &0.1cm,which are all lower than that under normal site conditions.

关 键 词：低劣立地条件 人工更新 对策 

分 类 号：S754[农业科学—森林经理学]