四种红树植物根茎叶的碳氮磷化学计量特征

生态学杂志

四种红树植物根茎叶的碳氮磷化学计量特征

樊月^1,2,潘云龙^1,2,陈志为^1,2,林晗^1,2,徐冉^1,2,3,吴承祯⁴,洪滔^1,2*

(¹福建农林大学林学院，福州 350002；²福建省高校森林生态系统过程与经营重点实验室，福州 350002；³江口红树林国家级自然保护区，福建漳州 363300； ⁴武夷学院，福建南平 354300)

出版日期:2019-04-10 发布日期:2019-04-10

C∶N∶P stoichiometry in roots, stems, and leaves of four mangrove species.

FAN Yue^1,2, PAN Yun-long^1,2, CHEN Zhi-wei^1,2, LIN Han^1,2, XU Ran^1,2,3, WU Cheng-zhen³, HONG Tao^1,2*

(¹College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China; ²Key Lab for Forest Ecosystem Processes and Management in Fujian Province, Fuzhou 350002, China; ³Zhangjiang Estuary Mangrove National Nature Reserve, Zhangzhou 363300, Fujian, China; ⁴Wuyi University, Nanping 354300, Fujian, China).

Online:2019-04-10 Published:2019-04-10

摘要/Abstract

摘要： 以漳江口红树林的秋茄（Kandelia candel）、木榄（Bruguiera gymnorrhiza）、桐花树（Aegiceras corniculatum）和老鼠簕（Acanthus ilicifolius）为研究对象，对其根、茎、叶中的碳（C）、氮（N）、磷（P）含量以及生态化学计量学特征进行分析。结果表明：秋茄、桐花树、老鼠簕3种植物各器官中的C含量均表现为茎、叶显著大于根，秋茄、木榄、桐花树3种植物的N、P含量均表现为叶＞茎＞根；桐花树、老鼠簕不同器官的C含量变异系数均表现为根＞叶＞茎，秋茄、木榄、老鼠簕3种植物N含量的变异系数均表现为根、茎大于叶，秋茄、木榄、桐花树3种植物P含量的变异系数均表现为根、茎大于叶；秋茄、木榄、老鼠簕C∶N的变异系数为根、茎大于叶；4种植物中，老鼠簕根、叶的P含量显著高于其他3种植物，茎的P含量略高于其他3种植物，根C、N、P与叶C、P的变异系数均大于其他3种植物；4种红树植物叶的C∶N∶P质量比（151∶9∶1）显著小于根（187∶4∶1）和茎（239∶5∶1），叶的C、N和P的生态化学计量特征相对稳定。分析红树植物不同器官养分元素间的分配规律，可为大尺度的红树林生态化学计量学研究提供理论基础，并为红树植物的保护与可持续经营提供科学依据。

关键词: 宽翅曲背蝗, 抗寒性, 过冷却点, 致死温度, 致死时间

Abstract: We analyzed the C, N and P concentrations and stoichiometric ratios (C∶N∶P) in roots, stems, and leaves of Kandelia candel, Bruguiera gymnorrhiza, Aegiceras corniculatum and Acanthus ilicifolius in Zhangjiang Estuary, subtropical China. The C concentrations in stems and leaves were significantly higher than those in roots of K. candel, A. corniculatum, and A. ilicifolius. The N and P concentrations ofK. candel, B. gymnorrhiza, and A. corniculatum were the highest in leaves, followed by stems and roots. In A. corniculatum and A. ilicifolius, the variation coefficient of stem C concentrations was significantly lower than that of roots and leaves. The variation coefficient of N concentration in K. candel, B. gymnorrhiza, A. ilicifoliusand that of P concentration in K. candel, B. gymnorrhiza, A. corniculatumwere the lowest in leaves. InK. candel, B. gymnorrhiza, and A. ilicifolius, the variation coefficient of C∶N ratio was significantly higher in roots and stems than that in leaves. Among the four mangrove species, foliar and root P concentrations in A. ilicifoliuswere significantly higher than those in the other species, and stem P in A. ilicifoliuswas slightly higher than in the other species. The variation coefficients of C, N, P concentrations in roots and C and P concentrations in leaves were higher in A. ilicifoliusthan in other species. C∶N∶P ratio in leaves (151∶9∶1) of four mangrove species was significantly lower than that in roots (187∶4∶1) or stems (239∶5∶1), suggesting that ecological stoichiometry of leaves was relatively stable. Our results provide theoretical basis for the large-caleresearch of ecological stoichiometry of mangrove and a scientific guidance for the conservation and sustainable management of mangrove plants.

Key words: Pararcyplera microptera meridionalis, cold hardiness, supercooling point, lethal temperature, lethal time.

樊月,潘云龙,陈志为,林晗,徐冉,吴承祯,洪滔. 四种红树植物根茎叶的碳氮磷化学计量特征[J]. 生态学杂志.

FAN Yue, PAN Yun-long, CHEN Zhi-wei, LIN Han, XU Ran, WU Cheng-zhen, HONG Tao. C∶N∶P stoichiometry in roots, stems, and leaves of four mangrove species.[J]. cje.

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