Variation in nutrient concentrations of Pinus sylvestris stems
作者:
Heljä‐Sisko Helmisaari,
Tapio Siltala,
期刊:
Scandinavian Journal of Forest Research
(Taylor Available online 1989)
卷期:
Volume 4,
issue 1-4
页码: 443-451
ISSN:0282-7581
年代: 1989
DOI:10.1080/02827588909382580
出版商: Taylor & Francis Group
关键词: bark;stemwood;nutrient concentrations;Pinus sylvestris
数据来源: Taylor
摘要:
Spatial and temporal variation of N, P, K, Ca, Mg, Mn, Zn, B and Al concentrations in Scots pine (Pinus sylvestrisL.) bark and stemwood was studied in three stands at different stages of development. Concentrations of the mobile nutrients N, P and K increased in stemwood and inner bark towards the youngest tissues vertically towards the top of the stem, and horizontally from the pith to the youngest annual rings. The concentrations of Ca, Mg, Mn and Zn were greatest in the oldest tissues and decreased horizontally towards the youngest annual rings. There was a slight increase of most nutrients near the divide between sapwood and heartwood. Seasonal nutrient variation was greatest in the inner bark. The highest nutrient concentrations occurred in winter and spring. Concentrations also varied with stand age, especially in the inner bark, being lowest in the oldest stand.
点击下载:
PDF (478KB)
返 回