Variation in Nutrient Concentrations of Pinus sylvestris Stems
Variation in Nutrient Concentrations of Pinus sylvestris Stems
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DOI：
10.1080/02827588909382580
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发表时间：
1989-01-01
影响因子：
1.8
通讯作者：
Siltala, Tapio
中科院分区：
文献类型：
--
作者：
Helmisaari, Helja-Sisko;Siltala, Tapio
樟子松氮、磷、钾、钙、镁、锰、锌、硼、铝含量的时空变化在三个不同发育阶段的林分中，对树皮和干材进行了研究。树干和内树皮中N、P、K的流动养分浓度在树干顶端的垂直方向和从髓到最年轻的年轮的水平方向上向最年轻的组织方向增加。钙、镁、锰和锌的浓度在最老的组织中最大，并在水平方向上向最年轻的年轮下降。在边材和心材分界线附近，大部分营养成分略有增加。树皮内层养分季节变化最大。营养盐浓度最高出现在冬春季。浓度也随林分年龄的变化而变化，特别是在树皮内层，最老的林分的浓度最低。
Spatial and temporal variation of N, P, K, Ca, Mg, Mn, Zn, B and Al concentrations in Scots pine (Pinus sylvestris L.) 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.