武夷山甜槠林细根生物量和生长量研究

应用生态学报 ›› 1998, Vol. 9 ›› Issue (4): 337-340.

• 研究论文 • 下一篇

武夷山甜槠林细根生物量和生长量研究

李凌浩¹, 林鹏¹, 邢雪荣²

1. 厦门大学生物学系, 厦门361005;
2. 中国科学院植物研究所, 北京100093

收稿日期:1998-01-05 修回日期:1998-03-10 出版日期:1998-07-25 发布日期:1998-07-25
基金资助:
福建武夷山国家级自然保护区管理局资助项目

Fine root biomass and production of Castanopsis eyrei forests in Wuyi Mountains

Li Linghao¹, Lin Peng¹, Xing Xuerong²

1. Xiamen University, Xiamen 361005;
2. Institute of Botany, Academica Sinica, Beijing 100093

Received:1998-01-05 Revised:1998-03-10 Online:1998-07-25 Published:1998-07-25

摘要/Abstract

摘要： 对武夷山甜槠林细根生物量和生长量的季节动态及其在不同群落发育阶段下的变化进行了初步研究,并对细根在养分归还中的作用进行了分析。结果表明,甜槠成熟林细根生物量为10.645t·hm^-2, 生长量为7.3715t·hm^-2·a^-1, 分解量为4.6775t·hm^-2·a^-1, 年周转率0.69次；细根生物量和生长量随林龄增长的变化模式为单峰型曲线,生物量至34龄时达到最大值,生长量至群落郁闭阶段(58龄)达到最大值；甜槠成熟林中,通过细根死亡的N素归还量占群落年归还总量的49.5%, 多于凋落物途径,P、Mg归还量所占比例为42.3%和28.9%, 略低于凋落物途径； K、Ca归还以降水淋溶为主,其次是凋落物途径,而细根途径仅占总归还量的19.3%和9.2%.

关键词: 细根, 生长量, 周转率, 林龄, 甜槠林, 武夷山, 土壤酶, 生长期, 芦苇, 柽柳

Abstract: Measurements for C.eyrei forests with different stand ages in Wuyi Mountains show that in mature stand forest, the biomass, production and decomposition of fine roots were 10.645t·hm^-2, 7.3715t·hm^-2 ·yr.^-1 and 4.6775t·hm^-2 ·yr.^-1 respectively, with a yearly turnover rate of 0.69 time.The biomass and production of fine roots varied with stand age, reaching their peaks at 34 and 58 years respectively.In the mature stand forest, the Nreturn by fine root decomposition contributed 49.5% of the yearly total Nreturn, more than that by litterfall; Pand Mg returns derived from dead fine root were 42.3% and 28.9% respectively, less than those from litterfall; and Kand Ca returns were mainly came from canopy, secondly from litterfall, and only 19.3% and 9.2%, respectively from fine roots.

Key words: Fine root, Biomass, Turnover rate, Stand age, Castanopsis eyrei forest, Wuyi Mountains, Phragmites australis, Tamarix ramosissima, soil enzyme, growth period

李凌浩, 林鹏, 邢雪荣. 武夷山甜槠林细根生物量和生长量研究[J]. 应用生态学报, 1998, 9(4): 337-340.

Li Linghao, Lin Peng, Xing Xuerong. Fine root biomass and production of Castanopsis eyrei forests in Wuyi Mountains[J]. Chinese Journal of Applied Ecology, 1998, 9(4): 337-340.

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武夷山甜槠林细根生物量和生长量研究

Fine root biomass and production of Castanopsis eyrei forests in Wuyi Mountains

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