摘要
为研究不同造林密度对马尾松生长及其木材干物质的影响,于2008年3月9日采用5个种植密度开展马尾松种植试验,种植密度分别选取:2000、3000、4000、5000、6000株/hm^(2)。每个种植密度设处理A组、处理B组、处理C组、处理D组、处理E组、处理F组,每个处理小组设3个重复。试验于2023年12月结束,之后对马尾松的生长、木材干物质和木材化学组成指标进行测定。结果表明:处理C组的胸径和冠幅显著低于处理A组和处理B组(P<0.05),但是处理C组的树高、枝下高和单株材积和处理A组、处理B组相比差异不显著(P> 0.05);处理D组的胸径、枝下高、冠幅和单株材积均显著低于处理A组和处理B组(P<0.05);处理E组除了胸径极显著低于处理A组和处理B组(P<0.01),其他如枝下高、冠幅和单株材积均显著低于处理A组和处理B组(P<0.05);处理F组的胸径、树高、冠幅和单株材积均极显著低于处理A组和处理B组(P<0.01);各个造林密度下马尾松的单株材积和木材基本密度差异不显著(P> 0.05);立木保存量以处理F组的最高,和处理E组、处理D组和处理C组的立木保存量相比差异不显著(P> 0.05),但是木材干物质产量以处理F组最高;不同造林密度对于马尾松木材的木质素、纤维素、戊聚糖、苯醇抽出物和1%的NaOH抽出物成分影响差异不显著(P> 0.05);说明造林密度对马尾松的胸径、枝下高、单株材积及冠幅影响显著;培育大径级别的马尾松,可以选择造林密度低的进行造林;用来作为纤维刨花板的原料或者纸浆的,可以选择造林密度高的进行造林;造林密度对马尾松的木材化学组成成分不影响。
In order to explore the effects of different afforestation densities on the growth and dry matter of Pinus massoniana,this experiment planted Pinus massoniana on March 9,2008.Five planting densities were used during the planting process,namely 2000,3000,4000,5000,and 6000.Each planting density was divided into treatment group A,treatment group B,treatment group C,treatment group D,treatment group E,and treatment group F,with three replicates for each treatment group;The experiment ended in December 2023,after which the growth,wood dry matter,and wood chemical composition indicators of Pinus massoniana were measured;The diameter at breast height and crown width of group C were significantly lower than those of group A and group B(P<0.05),but the differences in tree height,branch height,and individual plant volume between group C and group A and group B were not significant(P>0.05);The diameter at breast height,height under branches,crown width,and individual plant volume of group D were significantly lower than those of group A and group B(P<0.05);Except for significantly lower diameter at breast height(P<0.01),the height under branches,crown width,and individual plant volume of group E were significantly lower than those of group A and group B(P<0.05);The diameter at breast height,tree height,crown width,and individual volume of group F were significantly lower than those of group A and group B(P<0.01);There was no significant difference in individual volume and wood basic density of Pinus massoniana under different afforestation densities(P>0.05);The highest amount of standing wood preservation was observed in treatment F group,and there was no significant difference(P>0.05)compared to treatment E,treatment D,and treatment C groups.However,the dry matter yield of wood was highest in treatment F group;There was no significant difference in the effects of different afforestation densities on the components of lignin,cellulose,pentosan,benzyl alcohol extract,and 1%NaOH extract of Pinus massoniana wood(P>0.05);The a
作者
孙健
Sun Jian(People's Government of Gangdu Town,Huishui County,Guizhou Province,Huishui 550602,Guizhou,China)
出处
《绿色科技》
2024年第3期153-156,160,共5页
Journal of Green Science and Technology
关键词
造林密度
马尾松
生长
木材干物质
影响
afforestation density
Pinus massoniana
growth
wood dry matter
influence
