光照强度对不同苗龄水曲柳裸根苗和容器苗生长的影响  

Effects of Light Intensity on the Growth of Bare Root Seedlings and ContainerSeedlings of Fraxinus mandshurica at Different Seedling Ages

作　　者：彭政淋 苏嘉熙 李晨晞 苏安然 汤靖文 刘净 卫星[1,2] PENG Zhenglin;SU Jiaxi;LI Chenxi;SU Anran;TANG Jingwen;LIU Jing;WEI Xing(College of Forestry,Northeast Forestry University,Harbin 150040,China;Key Laboratory of Forest Ecosystem Management,Ministry of Education(Northeast Forestry University),Harbin 150040,China)

机构地区：[1]东北林业大学林学院,哈尔滨150040 [2]森林生态系统可持续经营教育部重点实验室(东北林业大学),哈尔滨150040

出　　处：《森林工程》2024年第2期68-76,共9页Forest Engineering

基　　金：中央高校基本科研业务费专项资金项目(2572020DR05)。

摘　　要：分析不同苗龄水曲柳裸根苗和容器苗在不同光照强度下的适应能力,可为水曲柳苗木精准造林提供科学依据。以水曲柳1年生裸根苗、1年生容器苗、2年生裸根苗和2年生容器苗为试验材料,观察大田遮阴设置的100%、75%、50%和25%光照强度下水曲柳各类型苗木生长情况。结果显示,容器苗的苗高增长量和地径增长量分别比裸根苗显著高出58.74%、60.27%,4种苗木的地径增长量和根生物量积累量均在25%光照强度下为最低。在50%光照强度下,1年生容器苗的苗高增长量、地径增长量、叶面积和细根数量分别比1年生裸根苗高出39.51%、28.80%、35.27%、28.73%,2年生容器苗的苗高增长量、地径增长量、叶面积和细根数量分别比2年生裸根苗高出96.03%、94.06%、28.45%、40.69%,1年生裸根苗的苗高增长量和地径增长量分别比2年生裸根苗高出59.56%、85.57%。研究表明,4种水曲柳苗木在25%光照条件下生长均较差,1年生裸根苗比2年生裸根苗在弱光(50%)条件下生长更优,容器苗比裸根苗具有更强的弱光(50%)适应性。Analyzing the adaptability of bare root and container seedlings of different ages of Fraxinus mandshurica under different light intensities can provide scientific basis for precise afforestation of F.mandshurica seedlings.Using 1-year-old bare root seedlings,1-year-old container seedlings,2-year-old bare root seedlings,and 2-year-old container seedlings of F.mandshurica as experimental materials,observe the growth of various types of F.mandshurica seedlings under 100%,75%,50%,and 25%light intensity in field shading settings.The results showed that the height and diameter growth of container seedlings were significantly higher than bare root seedlings by 58.74%and 60.27%,respectively.The diameter growth and root biomass accumulation of the four seedlings were the lowest under 25%light intensity.Under 50%light intensity,the height growth,diameter growth,leaf area,and fine root quantity of 1-year-old container seedlings were 39.51%,28.80%,35.27%,and 28.73%higher than those of 1-year-old bare root seedlings,respectively.The height growth,diameter growth,leaf area,and fine root quantity of 2-year-old container seedlings were 96.03%,94.06%,28.45%,and 40.69%higher than those of 2-year-old bare root seedlings,respectively,The height and diameter growth of 1-year-old bare root seedlings were 59.56%and 85.57%higher than those of 2-year-old bare root seedlings,respectively.Research had shown that four types of F.mandshurica seedlings had poor growth under 25%light conditions,1-year-old bare root seedlings grew better under weak light conditions(50%)than 2-year-old bare root seedlings,and container seedlings had stronger adaptability to weak light conditions(50%)than bare root seedlings.

关 键 词：水曲柳 光照强度 容器苗 裸根苗 苗龄 

分 类 号：S792[农业科学—林木遗传育种]