城市环境下几种园林树木养分利用效率的研究

Nutrient Use Efficiency of Some Urban Trees in Urban Environment

以常见的园林树木为研究对象,对位于合肥市安徽农业大学校园内及周边主要道路的园林树木养分利用效率进行了研究。结果表明:N利用效率(NUEN)变动在63.7~171.0g/g,P利用效率(NUEP)变动在303.8~4039.4g/g;落叶树种的氮、磷利用效率皆低于常绿树种;落叶树种的NUEN与NUEP呈极显著正相关,常绿树种NUEN与NUEP相关性不显著;所有树种放在一起分析,NUEN与NUEP亦呈极显著正相关;不同立地条件下,相同树种氮和磷的利用效率存在一定差异。

Nitrogen and phosphorus use efficiencies of major urban trees in Anhui agricultural university campus and surrounding main roads were investigated. The result from this study showed that nitrogen use efficiency(NUEN)varied from 63.7 to 171.0 g/g and phosphorus use efficiency(NUEP) from 303.8 to 4039.4 g/g. NUEN and NUEP of deciduous tree species was lower than that of evergreen ones. NUEN and NUEP of deciduous tree species were significantly positively correlated, while the NUEN and NUEP of evergreen tree species were not significantly correlated.NUEN was significantly correlated with NUEP for all tree species. Some differences in NUEN and NUEP were found for the same species in different sites.