摘要
【目的】分析樟子松幼苗在不同氮添加下的具体表现,以此确定最佳的氮添加量,进而促进樟子松幼苗的生长。【方法】以辽宁省铁岭县一年生樟子松幼苗为主要研究对象,采用随机区组设计,对照组设置为未施加氮,试验组设置四种氮添加量,即10 g·株^(-1)(T_(1))、20 g·株^(-1)(T_(2))、30 g·株^(-1)(T_(3))、40 g·株^(-1)(T_(4)),分析不同氮添加量对樟子松幼苗生长及生理特性的影响。【结果】与对照组相比,T_(1)、T_(2)、T_(3)、T_(4)处理均能够提升樟子松幼苗的苗高、新梢、地茎以及主根长,其中T_(3)处理的樟子松幼苗苗高、新梢、地茎以及主根长最大;与对照组相比,T_(1)、T_(2)、T_(3)、T_(4)处理均能够提升樟子松地上鲜重、地下鲜重、地上干重、地下干重、根冠比、苗木质量指数。【结论】30 g·株^(-1)的氮添加量最为适宜,能够显著促进樟子松幼苗的生长。
【Objective】To analyze the specific performance of pine seedlings under different nitrogen additions,so as to determine the optimal amount of nitrogen additions,and then promote the growth of pine seedlings.【Method】Taking Pinus sylvestris var.mongolica seedlings in Tieling county,Liaoning province as the main research object,using random area group design,the control group was set without nitrogen,four kinds of nitrogen addition,namely 10 g·plant^(-1)(T_(1)),20 g·plant^(-1)(T_(2)),30 g·plant^(-1)(T_(3))and 40 g·plant^(-1)(T_(4)),and the effects of different nitrogen additions on the growth and physiological characteristics of pine seedlings were analyzed.【Result】Compared with the control group,T_(1),T_(2),T_(3)and T_(4)treatments could increase the seedling height,new shoot,ground stem and taproot length of Pinus sylvestris var.mongolica seedlings,among which T_(3)treatment had the largest seedling height,new shoot,ground stem and taproot length.Compared with the control group,T_(1),T_(2),T_(3)and T_(4)treatments could increase aboveground fresh weight,underground fresh weight,aboveground dry weight,underground dry weight,root-shoot ratio and seedling quality index.【Conclusion】The nitrogen addition of 30 g·plant^(-1)is the most appropriate,which can significantly promote the growth of Pinus sylvestris var.mongolica seedlings.
作者
侯德石
HOU Deshi(State-run Hongfeng Forest Farm,Tieling County,Tieling City,Tieling 112602,Liaoning)
出处
《温带林业研究》
2023年第4期63-65,共3页
Journal of Temperate Forestry Research
关键词
樟子松
幼苗生长
氮添加
生长特性
生理特性
Pinus sylvestris var.mongolica
seedling growth
nitrogen addition
growth characteristics
physiological characteristics
