Partitioning Of Carbohydrates And Biomass Of Needles In Scots Pine Canopy
Partitioning Of Carbohydrates And Biomass Of Needles In Scots Pine Canopy
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DOI：
10.1515/znc-2002-3-417
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发表时间：
2002-04
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影响因子：
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通讯作者：
M. Mandre;H. Tullus;J. Klõšeiko
中科院分区：
文献类型：
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作者：
M. Mandre;H. Tullus;J. Klõšeiko
本研究旨在定量评价生长在桃金草立地型林分（主要分布于爱沙尼亚）的苏格兰松（Pinus sylvestris L.）林冠的非结构性碳水化合物和针叶生物量的时空分异。将冠层划分为10个相等的层，并从所有层中采样所研究特征的空间划分材料。我们的研究结果揭示了冠层不同层的针叶形态和碳水化合物分配的显著差异。碳水化合物的时间动态研究表明，在发芽前的早春，针叶中淀粉含量开始增加，可溶性碳水化合物含量随之下降。10月，针叶淀粉含量较低，可溶性糖浓度开始升高，冬季达到最大值。回归分析表明，在萌芽前，不同冠层中可溶性糖的分配与冠层高度的相关性较弱；然而，淀粉的相关性很强。在树木生长停止、日气温下降的秋季，可溶性糖的分配与冠层高度相关
The study was aimed at the quantitative evaluation of the temporal and spatial partitioning of non-structural carbohydrates and needle biomass in a canopy of Scots pine (Pinus sylvestris L.) growing in a Myrtillus site type forest stand (predominant in Estonia). The tree canopy was divided into ten equal layers and the material for the spatial partitioning of the investigated characteristics was sampled from all layers. Our findings revealed a significant variation in morphology and in the partitioning of carbohydrates in needles in different layers of the canopy. The study of the temporal dynamics of carbohydrates showed that starch content in needles started to increase in early spring before budbreak, which was accompanied by a decline in soluble carbohydrates. In October, the starch content of needles was low, but the concentration of soluble sugars started to increase attaining a maximum in winter. Regression analysis indicated that before budbreak, the partitioning of soluble sugars in different canopy layers was relatively weakly correlated with the height of the layer; however, a strong correlation was observed for starch. In autumn, when the growth of trees stopped and daily temperatures decreased, the allocation of soluble sugars was correlated with the height of the canopy layer