山东农业科学2025，Vol.57Issue(5)：111-118,8.DOI:10.14083/j.issn.1001-4942.2025.05.014
氮肥对芳樟幼苗生长、光合特性及叶精油产量的影响
Effects of Nitrogen Fertilizer on Growth,Photosynthetic Characteristics and Leaf Essential Oil Yield of Cinnamomum camphora
摘要
Abstract
In order to investigate the effects of nitrogen(N)on the growth,photosynthetic characteristics and leaf essential oil quality of Cinnamomum camphora seedlings,and to determine the most suitable amount of nitrogen fertilizer for the growth of C.camphora seedlings,2-year-old aromatic camphor tree seedlings were taken as the research objects,and the treatments of different amounts of N fertilizer were set with no fertilizer as control(CK)to analyze their effects on the growth,photosynthetic characteristics and leaf essential oil con-tent of C.camphora seedlings.The results showed that compared with CK,appropriate amount of nitrogen fer-tilizer significantly increased the height and diameter of C.camphora seedlings,as well as the biomass of roots,stems,leaves and the whole plant(P<0.05).Nitrogen fertilizer was conducive to increase the content of chlorophyll a and chlorophyll b in leaves of C.camphora seedlings,and it also improved photosynthesis and light acclimatization through increasing net photosynthetic rate(Pn),stomatal conductance(Gs),transpira-tion rate(Tr),water use efficiency(WUE),apparent quantum efficiency(AQY),maximum net photosyn-thetic rate(Pmax),light saturation point(Isp),light compensation point(Icp),and dark respiration rate(Rd)in leaves.Different fertilization treatments had no significantly effects on yield of leaf essential oil,and leaf linalool yield was significantly increased by 129.17%.The results of correlation analysis showed that lina-lool yield was significantly positively correlated with AQY,Pmax,Lsp and Rd,and significantly negatively correlated with intercellular CO2 concentration(Ci)(P<0.05).In conclusion,nitrogen fertilizer could signifi-cantly increase the height,diameter,whole plant biomass,photosynthetic characteristics and linalool yield of C.camphora seedlings,and the most suitable nitrogen addition concentration was 302 mg·L-1.The results of this study could provide a theoretical basis for nitrogen fertilizer application in the directional cultivation of C.camphora raw material forests and the high-quality and high-efficiency cultivation.关键词
氮肥/芳樟/幼苗生长/光合特性/叶精油/产量Key words
Nitrogen fertilizer/Cinnamomum camphora/Seedling growth/Photosynthetic characteris-tics/Leaf essential oil/Yield分类
农业科技引用本文复制引用
董恩元,章挺,伍艳芳,张月婷,吴巧花,刘新亮,唐明..氮肥对芳樟幼苗生长、光合特性及叶精油产量的影响[J].山东农业科学,2025,57(5):111-118,8.基金项目
江西省自然科学基金重点项目(20232ACB205018) （20232ACB205018）
江西省林业科学院基础研究与人才科研专项(2023522702) （2023522702）
