郭淑芸, 朱亚祥, 李铁华. 遮荫与加氮对青冈栎幼苗生长与生理特性的影响[J]. 西南林业大学学报(自然科学), 2024, 44(6): 1–10. DOI: 10.11929/j.swfu.202401010
引用本文: 郭淑芸, 朱亚祥, 李铁华. 遮荫与加氮对青冈栎幼苗生长与生理特性的影响[J]. 西南林业大学学报(自然科学), 2024, 44(6): 1–10. DOI: 10.11929/j.swfu.202401010
Guo Shuyun, Zhu Yaxiang, Li Tiehua. Effects of shading and nitrogen addition on growth and physiological characteristics of Cyclobalanopsis glauca seedlings[J]. Journal of Southwest Forestry University. DOI: 10.11929/j.swfu.202401010
Citation: Guo Shuyun, Zhu Yaxiang, Li Tiehua. Effects of shading and nitrogen addition on growth and physiological characteristics of Cyclobalanopsis glauca seedlings[J]. Journal of Southwest Forestry University. DOI: 10.11929/j.swfu.202401010

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遮荫与加氮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

  • 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。

     

    Abstract: 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 four light levels and four 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(P < 0.05). Through the principal component analysis and evaluation of each index of C. glauca seedlings, it is concluded that the maximum principal component comprehensive value of C. glauca seedlings is the treatment of 50% light intensity, 1.2 g/plant of nitrogen(L3N2). 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.

     

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