文章摘要
王家妍 1 ,魏国余 1 ,韦铄星 2,莫雅芳 1 ,蒋 燚 2.9 个主要南方人工林树种叶片化学计量学特征研究[J].广东农业科学,2019,46(5):48-53
9 个主要南方人工林树种叶片化学计量学特征研究
Study on Stoichiometric Characteristics of Leaves of Nine Major Plantation Species in Southern China
  
DOI:10.16768/j.issn.1004-874X.2019.05.007
中文关键词:       氮磷比  化学计量学  阔叶树种  针叶树种
英文关键词: nitrogen  phosphorus  potassium  ratio of nitrogen to phosphorous  chemometrics  broad-leaved tree  coniferous tree
基金项目:广西林业科技项目(桂林科字〔2016〕第 3 号)
作者单位
王家妍 1 ,魏国余 1 ,韦铄星 2,莫雅芳 1 ,蒋 燚 2 1. 广西国有高峰林场广西 南宁 5300022. 广西壮族自治区林业科学研究院 / 国家林业局 中南速生材繁育实验室 / 广西优良用材林资源培育重点实验室广西 南宁 530002 
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中文摘要:
      【目的】通过研究 9 个主要南方人工林树种叶片 N、P、K 化学计量学特征,丰富主要人工林树种 化学计量学基础数据,为我国南方地区林木种植和管护提供决策依据。【方法】野外平均木叶片采集,室内进 行化学测定分析 N、P、K 含量。【结果】9 个树种叶片的 N、P、K 含量均值分别为 13.90、1.39、8.70 mg/g,不 同树种间的 N、P、K 含量存在极显著差异,厚荚相思 N、P、K 含量高于其他树种, 9 个树种叶片的 N∶P、N∶K 和 K∶P 变化范围为 7.79~17.79、1.15~2.16、0.07~0.25。不同树种 N 和 P 含量呈极显著正相关关系,存在协同作 用。不同生活型树种叶片 N 和 P 元素含量存在极显著差异,表现为阔叶树种 N 和 P 含量明显大于针叶林。【结论】 9 个主要南方人工林树种生长主要受到 N 元素限制,在林分后期管理上应加强养分管理、增施氮肥。
英文摘要:
      【Objective】By studying the stoichiometric characteristics of nitrogen (N), phosphorus (P) and potassium (K) in the leaves of nine major plantation species in Southern China, the basic stoichiometric data of the main plantation species were enriched, which provided decision-making basis for forest planting and management in Southern China. 【Method】The leaves samples were collected from the average trees in the field, and then the contents of N, P and K were measured .【Conclusion】The average contents of N, P and K of nine tree species were 13.90 mg/g, 1.39 mg/g and 8.70 mg/g, respectively. There were significant differences in the contents of N, P and K among different tree species, and the contents of N, P and K of Acacia crassicarpa were much higher than those of other species. The ratios of N∶P, N∶K and K∶P in leaves of nine species ranged from 7.79 to 17.79, from 1.15 to 2.16, and from 0.07 to 0.25, respectively. There was an extremely significant positive correlation between the contents of N and P in different species, and there were synergistic effects. There were significant differences in the contents of N and P in leaves of different life-form tree species, and the contents of N and P in leaves of broad-leaved tree were significantly higher than those of coniferous tree.【Conclusion】The growth of 9 tree species were mainly restricted by nitrogen element, which indicated that the nutrients management should be strengthened and the application of nitrogen fertilizer should be increased in the later stage of forest management.
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