遮荫与氮添加对青冈栎幼苗生长与生理特性的影响  

Effects of Shading and Nitrogen Addition on Growth and Physiological Characteristics of Cyclobalanopsis glauca Seedlings

作　　者：郭淑芸 朱亚祥 李铁华[1,2] Guo Shuyun;Zhu Yaxiang;Li Tiehua(College of Forestry,Central South University of Forestry and Technology,Changsha Hunan 410004,China;National Long-term Scientific Research Base for Forestry in Mid-subtropics China,Central South University of Forestry and Technology,Changsha Hunan 410004,China)

机构地区：[1]中南林业科技大学林学院,湖南长沙410004 [2]中南林业科技大学中亚热带林学国家长期科研基地,湖南长沙410004

出　　处：《西南林业大学学报（自然科学）》2024年第6期37-46,共10页Journal of Southwest Forestry University：Natural Sciences

基　　金：国家重点研发计划项目(2021YFD2201304)资助。

摘　　要：为了探索适合青冈栎幼苗生长的光照和氮素条件及其互作效应,提高氮肥利用率,以1年生的青冈栎幼苗为研究对象,设置4种光照水平和4种氮素水平的双因素盆栽试验。结果表明:在相同光照强度下,青冈栎幼苗苗高、地径、叶面积、SOD、NR、GS均随着氮素的增加而呈现先增加后降低的变化趋势,MDA含量则呈现先降低后增加的变化趋势;在同一氮素水平下,青冈栎幼苗苗高、地径、叶面积、SOD、NR、GS均随着光照强度的减弱而呈现先增加后降低的变化趋势,MDA含量则呈现先降低后增加的变化趋势;不同光照和氮素水平之间存在显著的互作效应。青冈栎幼苗的主成分综合值最大的是光照强度为50%、氮素1.2 g/株,在此条件下青冈栎幼苗生长状况最佳,苗高增长量为31.1 cm、地径增长量为1.78 mm。In order to explore the suitable light and nitrogen levels and their interaction effects for the growth of Cyclobalanopsis glauca seedlings,improve the utilization rate of nitrogen fertilizer,one-year-old C.glauca seedlings were taken as the research object and a two-factor pot experiment was set up with 4 light levels and 4 nitrogen levels.The results showed that under the same light intensity,the seedling height,ground diameter,leaf area,activity of SOD,NR and GS of C.glauca seedlings increased first and then decreased with the increase of nitrogen.MDA content decreased first and then increased.Under the same nitrogen level,the seedling height,ground diameter,leaf area,activity of SOD,NR and GS of C.glauca seedlings increased first and then decreased with the decrease of light intensity.MDA content decreased first and then increased.There was a significant interaction between different light and nitrogen levels.The maximum principal component comprehensive value of C.glauca seedlings is the treatment of 50%light intensity,1.2 g/plant of nitrogen.Under the condition,the growth of C.glauca seedlings was the best,and the growth in seedling height and ground diameter are 31.1 cm and 1.78 mm respectively.

关 键 词：青冈栎 幼苗 光照 氮素 生长 生理特性 

分 类 号：S72[农业科学—林木遗传育种]