{"title":"印度西孟加拉邦热带雨林四种落叶树种养分再转移案例研究","authors":"Chittaranjan Das, Naba Kumar Mondal","doi":"10.1007/s42965-024-00352-x","DOIUrl":null,"url":null,"abstract":"<p>The internal retranslocation of nutrients of senescence leaves is a significant aspect of nutrient dynamics in a forest ecosystems. The present investigation was carried out by considering four types of deciduous tree species (<i>Shorea robusta</i>, <i>Tectona grandis</i>, <i>Schleichera oleosa</i>, and <i>Albizia lebbeck</i>) to assess nutrient resorption efficiency (NuRE) and resorption proficiency (NuRP) of nitrogen (N), phosphorous (P), and potassium (K), as well as seasonal changes of nutrient concentration in green and senescence leaves. Green and senescent leaves were sampled and analysed for NPK concentration by standard methods. Experimental results revealed that the higher nutrition contents were recorded in green leaves than senescence leaves. The highest N and P resorption efficiency (RE) were recorded for <i>S. robusta</i> and lowest for <i>T. grandis</i> (46.74%) and <i>A. lebbeck</i> (37.93%) respectively, whereas <i>T. grandis</i> exhibited the highest resorption efficiency of K (47.67%) and lowest for <i>A. lebbeck</i> (40.29%). Furthermore, the highest percentage of nutrients from mature leaves and soil were transported to the tree body during senescence were 47.0% (<i>S. oleosa</i>), and 21.29% (<i>T. grandis</i>), respectively. Moreover, nutrients were retranslocated from senescent leaves in the order as N > P > K. On the other hand, the nutrient resorption proficiency (NuRP) was highest with respect to N (53.26%) and P (62.07%) for <i>T. grandis</i> and K (59.71%) for <i>A. lebbeck</i>. Similarly, the lowest with respect to N (44.27%) and P (50.91%) for <i>S. robusta</i>, and K (52.33%) for <i>T. grandis</i>. 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The present investigation was carried out by considering four types of deciduous tree species (<i>Shorea robusta</i>, <i>Tectona grandis</i>, <i>Schleichera oleosa</i>, and <i>Albizia lebbeck</i>) to assess nutrient resorption efficiency (NuRE) and resorption proficiency (NuRP) of nitrogen (N), phosphorous (P), and potassium (K), as well as seasonal changes of nutrient concentration in green and senescence leaves. Green and senescent leaves were sampled and analysed for NPK concentration by standard methods. Experimental results revealed that the higher nutrition contents were recorded in green leaves than senescence leaves. The highest N and P resorption efficiency (RE) were recorded for <i>S. robusta</i> and lowest for <i>T. grandis</i> (46.74%) and <i>A. lebbeck</i> (37.93%) respectively, whereas <i>T. grandis</i> exhibited the highest resorption efficiency of K (47.67%) and lowest for <i>A. lebbeck</i> (40.29%). Furthermore, the highest percentage of nutrients from mature leaves and soil were transported to the tree body during senescence were 47.0% (<i>S. oleosa</i>), and 21.29% (<i>T. grandis</i>), respectively. Moreover, nutrients were retranslocated from senescent leaves in the order as N > P > K. On the other hand, the nutrient resorption proficiency (NuRP) was highest with respect to N (53.26%) and P (62.07%) for <i>T. grandis</i> and K (59.71%) for <i>A. lebbeck</i>. Similarly, the lowest with respect to N (44.27%) and P (50.91%) for <i>S. robusta</i>, and K (52.33%) for <i>T. grandis</i>. 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引用次数: 0
摘要
衰老叶片养分的内部再转移是森林生态系统养分动态的一个重要方面。本研究以四种落叶树种（Shorea robusta、Tectona grandis、Schleichera oleosa 和 Albizia lebbeck）为对象，评估了绿叶和衰老叶中氮、磷、钾的养分吸收效率（NuRE）和吸收能力（NuRP），以及养分浓度的季节变化。采用标准方法对绿叶和衰老叶取样并分析氮磷钾浓度。实验结果表明，绿叶的营养含量高于衰老叶。S. robusta 的氮和磷吸收效率（RE）最高，T. grandis（46.74%）和 A. lebbeck（37.93%）最低，而 T. grandis 的钾吸收效率最高（47.67%），A. lebbeck 最低（40.29%）。此外，成熟叶片和土壤中的养分在衰老期被输送到树体的比例最高，分别为 47.0%（油桐）和 21.29%（桉树）。此外，养分从衰老叶片中重新转移的顺序为 N > P > K。另一方面，养分吸收率（NuRP）最高的是 T. grandis 的 N（53.26%）和 P（62.07%），以及 A. lebbeck 的 K（59.71%）。同样，S. robusta 的氮（44.27%）和磷（50.91%）含量最低，T. grandis 的钾（52.33%）含量最低。因此，可以得出结论，绿叶和衰老叶中养分浓度的变化可能是导致再转移效率不同的原因。 图摘
A case study of nutrient retranslocation in four deciduous tree species of West Bengal tropical forest, India
The internal retranslocation of nutrients of senescence leaves is a significant aspect of nutrient dynamics in a forest ecosystems. The present investigation was carried out by considering four types of deciduous tree species (Shorea robusta, Tectona grandis, Schleichera oleosa, and Albizia lebbeck) to assess nutrient resorption efficiency (NuRE) and resorption proficiency (NuRP) of nitrogen (N), phosphorous (P), and potassium (K), as well as seasonal changes of nutrient concentration in green and senescence leaves. Green and senescent leaves were sampled and analysed for NPK concentration by standard methods. Experimental results revealed that the higher nutrition contents were recorded in green leaves than senescence leaves. The highest N and P resorption efficiency (RE) were recorded for S. robusta and lowest for T. grandis (46.74%) and A. lebbeck (37.93%) respectively, whereas T. grandis exhibited the highest resorption efficiency of K (47.67%) and lowest for A. lebbeck (40.29%). Furthermore, the highest percentage of nutrients from mature leaves and soil were transported to the tree body during senescence were 47.0% (S. oleosa), and 21.29% (T. grandis), respectively. Moreover, nutrients were retranslocated from senescent leaves in the order as N > P > K. On the other hand, the nutrient resorption proficiency (NuRP) was highest with respect to N (53.26%) and P (62.07%) for T. grandis and K (59.71%) for A. lebbeck. Similarly, the lowest with respect to N (44.27%) and P (50.91%) for S. robusta, and K (52.33%) for T. grandis. Therefore, it can be concluded that changes in nutrient concentrations in green and senescence leaves could be the possible reason for different retranslocation efficiency.
期刊介绍：
Tropical Ecology is devoted to all aspects of fundamental and applied ecological research in tropical and sub-tropical ecosystems. Nevertheless, the cutting-edge research in new ecological concepts, methodology and reviews on contemporary themes, not necessarily confined to tropics and sub-tropics, may also be considered for publication at the discretion of the Editor-in-Chief. Areas of current interest include: Biological diversity and its management; Conservation and restoration ecology; Human ecology; Ecological economics; Ecosystem structure and functioning; Ecosystem services; Ecosystem sustainability; Stress and disturbance ecology; Ecology of global change; Ecological modeling; Evolutionary ecology; Quantitative ecology; and Social ecology.
The Journal Tropical Ecology features a distinguished editorial board, working on various ecological aspects of tropical and sub-tropical systems from diverse continents.
Tropical Ecology publishes:
· Original research papers
· Short communications
· Reviews and Mini-reviews on topical themes
· Scientific correspondence
· Book Reviews
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