西南林业大学学报2025，Vol.45Issue(3)：1-10,10.DOI:10.11929/j.swfu.202401068
氮磷配施对闽楠容器苗生长及根系形态的影响
Effects of Combined Application of Nitrogen and Phosphorus on the Growth and Root Morphology of Phoebe bournei Container Seedlings
摘要
Abstract
In order to investigate the effects of single fertilization and nitrogen-phosphorus dosing on the growth and root morphology of Phoebe bournei container seedlings,8 treatments were set up,namely,control,low level nitrogen application,conventional nitrogen application,high level nitrogen application,phosphorus ap-plication,low level nitrogen+phosphorus,conventional nitrogen+phosphorus,high level nitrogen+phosphorus.The effects of different fertilization treatments on the growth and root morphology of P.bournei container seed-lings were determined,and the differences between nitrogen and phosphorus fertilization and single fertilization were compared.The results showed that the seedling height,diameter,relative growth rate,biomass,and quality index of seedlings were better than single application of nitrogen in the case of nitrogen and phosphorus fertiliza-tion.With the increase of fertilizer application,the seedling height,ground diameter,relative growth rate of seed-ling height,and seedling quality index of P.bournei container seedlings showed a tendency of increasing and then decreasing,which reached the maximum under the conventional nitrogen+phosphorus application treatment.The accumulation of biomass in general showed a trend that the aboveground biomass was greater than the below-ground biomass,and the underground portion,aboveground portion,and total biomass also showed the same trend of first increasing and then decreasing,and also reached the maximum under the conventional application of nitro-gen+phosphorus,which were 0.34 g,1.59 g,and 1.93 g,respectively.Under the single application of phosphor-us,the root-crown ratio,total root length,surface area of root,root volume,and the average diameter of the root system were all better than single application of nitrogen and nitrogen-phosphorus combination.The root-crown ratio of P.bournei container seedlings reached a maximum of 0.43 under single phosphorus application,and the total root length,root surface area,root volume and average diameter of the root system also reached a maximum under this treatment,which were 309 cm,119.98 cm2,4.03 cm3 and 1.28 mm,respectively,and 1.6,3.36,7.73 and 2.13 times higher than those of the control.Overall,reasonable fertilization had a significant promotion effect on the growth of P.bournei container seedlings,and the promotion effect of phosphorus on the growth of root sys-tem was very obvious.Too low fertilization would form a limitation on the growth of seedlings,while too high would cause inhibition,both of which were unfavorable to the growth of seedlings.Seedling height,ground dia-meter,relative growth rate of seedling height,biomass,and seedling quality index under nitrogen-phosphorus dos-ing were better than those under single application of nitrogen,and reached the maximum in the treatment of(nitrogen fertilization of 4760 mg/plant+phosphorus fertilization of 2000 mg/plant)as a whole;the root-crown ratio and root growth development under single application of phosphorus treatment were the best.关键词
闽楠/容器苗/氮磷配施/生长指标/根系形态Key words
Phoebe bournei/container seedling/combined application of nitrogen and phosphorus/growth indicator/root morphology分类
林学引用本文复制引用
赵翊博,张广涛,刘尖,喻方圆..氮磷配施对闽楠容器苗生长及根系形态的影响[J].西南林业大学学报,2025,45(3):1-10,10.基金项目
江西省林业局林业科技创新专项项目(创新专项[2021]16号)资助 （创新专项[2021]16号）
江苏高校优势学科建设工程项目(PAPD)资助. （PAPD）
