Effects of shading and fertilizer treatments on the growth characteristics of Chamaecyparis obtusa (S. et Z.) Endlicher seedlings

Forest Science and Technology

Do-Hyung Lee¹  Jung Won Sung²  Dae-Bong Kang³ 

[1] Department of Forest Resources, Yeungnam University, Gyeongsan, Republic of Kore;Department of Landscape Architecture, Korea National College of Agriculture and Fisheries, Jeonju-si, Republic of Kore;Dvision of Garden & Collection, Sejong National Arboretum, Sejong, Republic of Kore;

关键词: Chamaecyparis obtusa;    fertilization concentrations;    reforestation;    shading conditions;    seedling growth characteristics;    seedling quality index;   

DOI  :  10.1080/21580103.2021.1957722

来源: Taylor & Francis

【 摘 要 】

Chamaecyparis obtusa is increasing the main reforestation species in the warmer southern part of the Republic of Korea because of its resistance to climate warming and economic value for timber. In this study, we investigated the growth response of Chamaecyparis obtusa 2-0 container seedlings to combined artificial shading (full sunlight, 35%, 55%, and 75%) and fertilization (no fertilization, 0.5 g/L, 1.0 g/L 1.5 g/L, 2.0 g/L, 3.0 g/L) treatments. Seedlings treated with 1.0 g/L fertilization and in full sunlight condition showed the highest height growth while seedlings treated with 0.5 g/L fertilization and in full sunlight condition showed the highest growth of root collar diameter. Seedlings treated with 1.0 g/L fertilization and in full sunlight condition showed the highest total dry weight while those treated with 0.5 g/L, 1.0 g/L and 1.5 g/L fertilization and in full sunlight condition and 0.5 g/L fertilization in 35% artificial shading showed the highest Height/Root collar diameter ratio. In addition, seedlings treated with 1.0 g/L fertilization and in full sunlight condition showed the highest seedling quality index. In general, the fertilization treatment effects on seedling growth characteristics were appreciably significantly different across the shading treatment conditions. The magnitude of the differences in the interaction effect of the fertilization treatments is higher in lower than in higher shading treatment conditions. The results suggest that 1.0 g/L seedling fertilization growing in full sunlight condition is the most appropriate nursery treatment level for producing superior quality Chamaecyparis obtusa 2-0 container seedlings. The suggested optimum artificial shading and fertilizer treatments level can be used as preliminary data for producing superior seedlings Chamaecyparis obtusa 2-0 container seedlings capable of achieving sustained reforestation and landscape restoration success in the southern part of the Republic of Korea and similar locations with warming climatic and conditions.

【 授权许可】

CC BY