云南松林的根系生物量及其分布规律的研究

应用生态学报 ›› 2005, Vol. 16 ›› Issue (1): 21-24.

云南松林的根系生物量及其分布规律的研究

邓坤枚¹, 罗天祥¹, 张林¹, 王学云², 李长会²

1. 中国科学院地理科学与资源研究所, 北京, 100101;
2. 云南省永仁县林业局, 永仁, 651400

收稿日期:2003-11-07 修回日期:2004-03-16 出版日期:2005-01-15 发布日期:2005-01-15
通讯作者: 罗天祥,E-mail:luotx@igsnrr.ac.cn
基金资助:
中国科学院地理科学与资源研究所知识创新工程项目(CX10G-E01-02-03)、中国科学院院长青年基金特别支持项目(2002年)、国家自然科学基金项目(30370290)和美国林务局全球变化研究资助项目(USDAForestService,00-CA-11242343-017).

Root biomass of different stand-age Pinus yunnanensis forests and its distribution pattern in different soil depths

DENG Kunmei¹, LUO Tianxiang¹, ZHANG Lin¹, WANG Xueyun², LI Changhui ²

1. Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
2. Yongren Forestry Bureau of Yunnan Province, Yongren 651400, China

Received:2003-11-07 Revised:2004-03-16 Online:2005-01-15 Published:2005-01-15

摘要/Abstract

摘要： 利用平均标准木机械布点法测定了云南省永仁林业局云南松不同龄组林分的根系生物量及其沿土壤剖面深度的分布规律.结果表明,林分根系总生物量随林龄而增加,幼龄林(15～17年)的根系生物量为8.50 t·hm^-2,中龄林(30～32年)为11.70 t·hm^-2,成熟林为(＞62年)18.91 t·hm^-2.在不同龄组林分中,粗根(＞10mm)生物量差异最大(1.5～12.3 t·hm^-2),而中根(5～10 mm)(1.4～1.6 t·hm^-2)及小根(＜5 mm)(5.3～6.2 t·hm^-2)的生物量差异最小.根系生物量沿土壤深度迅速减少,约93%的根系生物量集中分布在0～30 cm土层中,深土层(30～115 cm)的根系生物量仅占7%左右.

关键词: 根系生物量, 云南松林, 林分年龄, 土层深度

Abstract: With average-tree-specific sampling method,the authors measured the root biomass of Pinus yunnanensis forests with different stand ages in Yongren County,Yunnan Province.The results indicated that total root biomass increased from 8.50 t·hm^-2 in young stand (15～17 yr) to 11.70 t·hm^-2 in middle-aged stand (30～32 yr),and to 18.91 t·hm^-2 in mature stand (60～130 yr).Among different stand age classes,the biomass of coarse roots (>10 mm) varied greatly (1.5～12.3 t·hm^-2),whereas those of medium (5～10 mm) and fine(<5 mm)roots showed less variation (medium roots 1.4～1.6 t·hm^-2,fine roots 5.3～6.2 t·hm^-2).The root biomass of mature stand decreased with soil depth,approximately 93% of total underground biomass being distributed in surface layer (0～30 cm),and only 7% in deeper layer (30～115 cm).

Key words: Root biomass, Pinus yunnanensis forest, Stand age, Soil depth

中图分类号:

S718

邓坤枚, 罗天祥, 张林, 王学云, 李长会. 云南松林的根系生物量及其分布规律的研究[J]. 应用生态学报, 2005, 16(1): 21-24.

DENG Kunmei, LUO Tianxiang, ZHANG Lin, WANG Xueyun, LI Changhui . Root biomass of different stand-age Pinus yunnanensis forests and its distribution pattern in different soil depths [J]. Chinese Journal of Applied Ecology, 2005, 16(1): 21-24.

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