摘要
为探讨环境因子对不同树种幼苗影响的作用机理,以白桦(Betula platyphylla)和五角枫(Acer mono)为试验对象,设置4种竞争方式(无竞争、全竞争、地上竞争和地下竞争)、4种土壤养分浓度(0、8、16和32 g/m2)及2种养分分布水平(均、异质),分析不同环境因子对幼苗生长的影响。结果表明,生态环境对幼苗生长的影响在自然界中普遍存在,各环境因子之间既存在独立性又存在相关性。草本竞争对幼苗生长的影响大于土壤养分状况,生存空间是影响幼苗生长的关键因素。草本竞争对于幼苗的生长存在不利影响;环境因子影响幼苗生长主要反映在幼苗的生物量分配状况上;环境因子对幼苗生长的影响在两种树种间存在显著差异。
In order to explore mechanism of effects of environmental factors on seedlings of different tree species,taking Betula platyphylla and Acer mono as experimental subjects,four competition methods(no competition,full competition,aboveground competition and underground competition),four soil nutrient concentrations(0,8,16 and 32 g/m2)and two nutrient distribution levels(homogeneity,heterogeneity)were set up to analyze effects of different environmental factors on growth of seedlings.Results showed that influence of ecological environment on growth of seedlings was common in nature,and there were independence and correlation among environmental factors.Influence of herbaceous competition on seedling growth was greater than that of soil nutrient status.Living space was key factor affecting seedling growth.Herbaceous competition had adverse effect on growth of seedlings.Influences of environmental factors on seedling growth mainly reflected in biomass distribution of seedlings.Influences of environmental factors on seedling growth were significantly different between two tree species.
作者
孟嘉欣
南宏伟
郭晋平
刘卫敏
Meng Jiaxin;Nan Hongwei;Guo Jinping;Liu Weimin(College of Forestry,Shanxi Agricultural University,Taigu,Shanxi 030801,China)
出处
《广西林业科学》
2023年第4期468-475,共8页
Guangxi Forestry Science
基金
国家自然科学基金项目(31470630)。
关键词
草本竞争
土壤养分
冗余分析
结构方程模型
白桦
五角枫
herbaceous competition
soil nutrient
redundancy analysis
model of structural equation
Betula platyphylla
Acer mono
