西南林业大学学报2025，Vol.45Issue(7)：32-39,8.DOI:10.11929/j.swfu.202406050
氮磷耦合对樟树幼苗根叶功能性状的影响
Effects of Nitrogen and Phosphorous Coupling on Root and Leaf Functional Traits of Cinnamomum camphora
摘要
Abstract
This study used one-year-old Cinnamomum camphora seedlings as the research object to examine the effects of nitrogen and phosphorus ratios on the growth of C.camphora seedlings in acidic red soil.The ef-fects of varying concentrations on the phenotype as well as the root and leaf functional indices of C.camphora seedlings were examined through a pot experiment conducted with a nitrogen to phosphorus ratio of 5∶6.The res-ults showed that in accordance with the precise ratios and concentrations,the growth indexes(ground diameter,seedling height,and chlorophyll content)in the treatments with nitrogen and phosphorus addition were signific-antly higher than in the other treatments;compared with the control(no nitrogen and phosphorus added,CK),the nutrient additions significantly promoted the weight of the leaves and leaf phosphorus content;under the first level of root sequences,there was a significant difference between the N1P1 treatment and CK in terms of average dia-meter,specific surface area,and tissue density,with increases of 52.05％,57.73％,and 53.66％,respectively;in the secondary root sequence,N1P1 treatment resulted in significantly greater mean diameter and tissue density compared to CK,with increases of 49.59％and 25.31％,respectively;in different root sequence,N2P2 treatment resulted in significantly greater mean diameter compared to CK,with increases of 49.30％and 46.60％;fertilizer treatments,sequential levels,and their interactions had significant effects on nutrients and morpho-functional traits of the root system.In summary,nitrogen and phosphorus added in effective doses at specific stoichiometric ratios could significantly affect the root and leaf functional traits and promote the growth of C.camphora seed-lings.关键词
樟树/细根功能/性状/氮磷耦合/特定化学计量比Key words
Cinnamomum camphora/fine root function/trait/nitrogen and phosphorous coupling/specific stoichiometric ratio分类
农业科技引用本文复制引用
陈平,王小东,涂白连,李雨华,盛亚晶,徐海宁..氮磷耦合对樟树幼苗根叶功能性状的影响[J].西南林业大学学报,2025,45(7):32-39,8.基金项目
江西省自然科学基金重点项目(20232ACB205018)资助 （20232ACB205018）
江西省林业科学院基础研究与人才科研专项项目(2023513002)资助 （2023513002）
"十三五"国家重点研发计划项目(2016YFD0600605)资助. （2016YFD0600605）
