摘要
为探索促进油松人工林生长的最佳保留密度,以3年生油松人工幼龄林为研究对象,设置3个不同密度处理,测定不同密度设计下油松人工幼龄林的生长情况和土壤性状。结果表明:(1)不同密度设计下,油松人工幼龄林的生长情况有显著差异,在密度为1200株·hm^(-2)时,油松人工幼龄林树高、地径、冠幅等生长指标最佳,其次分别是1000和1400株·hm^(-2)。(2)不同密度设计下,有机碳、全氮、硝态氮、铵态氮和含水量等土壤养分指标中,1200和1400株·hm^(-2)比较差异不明显,而1000株·hm^(-2)各项指标较低;速效钾、有效磷在1200株·hm^(-2)密度设计下更高,1400株·hm^(-2)次之,1000株·hm^(-2)最低,差异显著。因此,油松人工幼龄林密度设计在1200株·hm^(-2)时,其生长情况最为理想,土壤性状也比较好,适宜辽西半干旱地区油松人工幼龄林造林密度。
In order to explore the best retention density to promote the growth of Pinus tabulaeformis plantation,three-year-old Pinus tabulaeformis artificial young forests were taken as the research objects,three different density treatments were set up to determine the growth and soil traits of Pinus tabulaeformis artificial young forests under different density designs.The results showed as the following two aspects.(1)The growth of Pinus tabulaeformis artificial young forests was significantly different under different density designs:the growth indexes,such as tree height,ground diameter and crown size,were the best under the density design of 1200 plants·hm^(-2),followed by the density design of 1000 plants·hm^(-2)and 1400 plants·hm^(-2).(2)Under different density designs,there was no significant difference in soil nutrient indexes such as organic carbon,total nitrogen,nitrate nitrogen,ammonium nitrogen and water content between 1200 plants·hm^(-2)and 1400 plants·hm^(-2),while the indexes of 1000 plants·hm^(-2)were lower;effective potassium and available phosphorus were higher underthe density design of 1200 plants·hm^(-2),followed by 1400 plants·hm^(-2)and 1000 plants·hm^(-2),which showed a significant difference.Therefore,when the density of Pinus tabulaeformis artificial young forests is designed at 1200 plants·hm^(-2),the growth is the most ideal and soil traits are better,which is suitable for the afforestation density of Pinus tabulaeformis artificial young forests in the semi-arid area of western Liaoning.
作者
张洪伟
Zhang Hongwei(Liaoning Ecological Experimental Forest Farm,Chaoyang 122000,China)
出处
《防护林科技》
2023年第6期39-41,共3页
Protection Forest Science and Technology
关键词
辽西半干旱地区
密度设计
油松人工幼龄林
林分生长
土壤养分
semi-arid area in western Liaoning
density design
Pinus tabulaeformis artificial young forest
stand growth
soil nutrients
