江汉平原主栽杨树品种不同密度下多年生长特征比较  

Comparison of Multi-year Growth Characteristics of Main Poplar Varieties in Jianghan Plain at Different Densities

作　　者：黄国伟[1] 张新叶[1] 马林江[1] 刘华 樊孝萍 龙开莲 姚精奎 HUANG Guowei;ZHANG Xinye;MA Linjiang;LIU Hua;FAN Xiaoping;LONG Kailian;YAO Jingkui(Hubei Forestry Academy,Wuhan 430075;Forest Tree Seed and Seedling Administrative General Station of Hubei Forestry Department,Wuhan 430079;Shishou Poplar Research Institute of Hubei Academy of Forestry,Shishou,Hubei 434400;Hanjiang River Administration of Hubei Province,Qianjiang,Hubei 433100)

机构地区：[1]湖北省林业科学研究院,武汉430075 [2]湖北省林业局林木种苗管理总站,武汉430079 [3]湖北省林科院石首杨树研究所,湖北石首434400 [4]湖北省汉江河道管理局,湖北潜江433100

出　　处：《中国农学通报》2023年第29期24-31,共8页Chinese Agricultural Science Bulletin

基　　金：国家重点研发计划课题“美洲黑杨大径级工业资源材精准高效培育技术研究”(2021YFD2201202)。

摘　　要：为比较不同品种不同密度下生长差异,以江汉平原主栽杨树品种为材料,通过设置不同密度配置,连续5年测量试验林的生长特征。结果显示,不同品种随林龄增加对密度有着不同的响应规律,‘中林2025杨’在278株/hm^(2)密度下,树高相比其他密度表现出显著优势,而其他品种随林龄增加不同密度间树高并没有拉开明显差距。不同密度对4个杨树品种的胸径影响非常大,且在造林的第2年就表现出明显差异。从大径材培育上来看,‘中林2025杨’和‘丹红杨’需要278株/hm^(2)以下的密度,‘楚林2号杨’和‘华石2号杨’333株/hm^(2)以下密度即可。‘中林2025杨’在造林3年后,278株/hm^(2)密度下的蓄积量超过了其他密度,其他品种基本上密度越大,蓄积量越大,但随着林龄的增加,蓄积量之间的差异有所收窄。5年生各密度林分生长特征比较可以看出,不同品种不同密度间差异均达到显著水平。综合来看,在江汉平原‘丹红杨’和‘华石2号杨’相比‘中林2025杨’和‘楚林2号杨’杨更具有推广利用价值,‘中林2025杨’不适合密植,其他3个品种5年内可以设计833株/hm^(2)的密度,之后对密度进行动态调整,逐步间伐,以适应生长和提升材质的需要,获得更高的收益。In order to compare the growth differences of different polar varieties at different densities,the main planting poplar varieties in Jianghan Plain were used as materials.By setting different planting densities,the growth characteristics of the experimental forest were continuously measured for 5 years.The results showed that different varieties had different responses to the planting density with the increase of stand age.At the density of 278 ind/hm^(2),the tree height of‘Zhonglin 2025’showed a significant advantage compared with that at other densities.However,other varieties had no significant difference in tree height at different densities with the increase of stand age.Different densities had great influence on the diameter at breast height(DBH)of the four main planting poplar varieties,and showed significant differences in the second year of afforestation.From the perspective of large diameter timber cultivation,the planting density for‘Zhonglin 2025’and‘Danhong’should be less than 278 ind/hm^(2),and the planting density for‘Chulin 2’and‘Huashi 2’should be below 333 ind/hm^(2).After 3 years of afforestation,the accumulation of‘Zhonglin 2025’at the density of 278 ind/hm^(2)exceeded that of other densities.For other varieties,the higher the density,the greater the accumulation.But with the increase of stand age,the difference of the accumulation of different varieties was narrowed.Comparing the growth characteristics of 5-year-old stands at different densities,it could be seen that the differences among different varieties and different densities reached a significant level.On the whole,in Jianghan Plain,‘Danhong’and‘Huashi 2’have greater promotion and utilization value than‘Zhonglin 2025’and‘Chulin 2’.‘Zhonglin 2025’is not suitable for dense planting,and other three varieties can be planted at a density of 833 ind/hm^(2)within 5 years,followed by adjusting the density and gradually thinning,in order to meet the needs of tree growth and quality improvement,and get

关 键 词：江汉平原 杨树 密度 多年 生长特征 

分 类 号：S72[农业科学—林木遗传育种]