不同代数杉木林养分积累和分布的比较研究

应用生态学报 ›› 2000, Vol. ›› Issue (4): 501-506.

不同代数杉木林养分积累和分布的比较研究

马祥庆¹, 刘爱琴¹, 马壮¹, 范少辉²

1. 福建林学院福建杉木研究中心, 南平353001;
2. 中国林业科学研究院林业研究所, 北京100091

收稿日期:1999-06-01 修回日期:1999-11-12 出版日期:2000-07-25
通讯作者: 马祥庆,男,1966年生,博士,副研究员,主要从事人工林栽培生物学及生态学方面的研究,已发表学术论文30余篇.
基金资助:
CAF/IDRC/CIFOR国际合作项目REDFOL专题;国家自然科学基金重点项目(39630240);福建省教委测试基金

A comparative study on nutrient accumulation and distribution of different generations of Chinese fir plantations

MA Xiangqing¹, LIU Aiqin¹, MA Zhuang¹, FAN Shaohui²

1. Chinese Fir Research Central of Fujian Forestry College, Nanping 353001;
2. Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091

Received:1999-06-01 Revised:1999-11-12 Online:2000-07-25

摘要/Abstract

摘要： 在全国杉木中心产区,选择不同栽植代数(1、2、3代)、不同年龄阶段(5、10、15、20年)、不同立地(14、16、18地位指数)的杉木人工林,进行不同栽植代数杉木林养分积累和分布的比较研究.结果表明,栽植代数对杉木林养分积累和分布有较大影响.随栽植代数增加,杉木林乔木层养分积累及养分利用效率均呈逐代递减趋势,表现为3代<2代<1代,而林下植被养分积累呈逐代增加趋势,2、3代杉木林乔木层养分积累分别比1代下降17.62%和36.28%,3代比2代下降22.65%,同时多代连栽杉木林养分利用效率下降,生产单位干物质所需养分增加,增加了杉木生长对林地肥力的压力,不利于林地肥力的维持,但有利于其林下植被的养分积累.

Abstract: The nutrient accumulations and distribution of different generation of Chinese fir plantations in central production areas of China were studied through the investigation of plantation with different generation(first,second and third),ages(5,10,15,20 years old)and sites(site index 14,16 and 18).The nutrient accumulations and distribution of Chinese fir plantations were greatly influenced by the number of planting generation.Nutrient accumulation and utlization efficiency in tree layer of Chinese fir plantations declined with the increasing planting generation number,with the first generation>the second>the third;while the nutrient accumulation of understory vegetation was increased with the increasing of planting generation number.Compared with the first generation plantations,nutrient accumulation of tree layer of the second and the third generations decreased by 17.56% and 36.24% respectively,and the third generation platation decreased by 22.65% than the second generation.Meanwhile,successive planting resulted in a decreasing nutrient utilization efficiency of Chinese fir plantation,and an increasing nutrient necessary for dry matter production per unit,which is disadvantageous to the maintaining of soil fertility,but beneficial to the nutrient accumulation of understory vegetation.

马祥庆, 刘爱琴, 马壮, 范少辉. 不同代数杉木林养分积累和分布的比较研究[J]. 应用生态学报, 2000, (4): 501-506.

MA Xiangqing, LIU Aiqin, MA Zhuang, FAN Shaohui. A comparative study on nutrient accumulation and distribution of different generations of Chinese fir plantations[J]. Chinese Journal of Applied Ecology, 2000, (4): 501-506.

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