杨树细根及草根的生产力与周转的研究

应用生态学报 ›› 2001, Vol. 12 ›› Issue (6): 829-832.

杨树细根及草根的生产力与周转的研究

李培芝, 范世华, 王力华, 许思明

中国科学院沈阳应用生态研究所, 沈阳, 11016

收稿日期:2000-02-10 修回日期:2001-06-13 发布日期:2001-11-25
通讯作者: 李培芝,女,1951年生.高级工程师,主要从事落叶松遗传育种和树木营养元素循环研究,发表论文20余篇.Email:lhwang@iae.ac.cn E-mail:lhwang@iae.ac.cn
基金资助:
中国科学院沈阳生态试验站资助项目.

Productivity and turnover of fine roots in poplar tree and grass roots

LI Peizhi, FAN Shihua, WANG Lihua, XU Siming

Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016

Received:2000-02-10 Revised:2001-06-13 Published:2001-11-25

摘要/Abstract

摘要： 对北方杨树人工林0～0cm土层中杨树细根和草根(≤2mm)年生物量、分解量、死亡量、生长量和周转率进行观测研究.结果表明,杨树细根的年生物量为2.062t·hm^-2,死根生物量为0.76t·hm^-2,分解量为0.158t·hm^-2,生长量为2.351t·hm^-2,周转率为每年1.1次.活草根的年生物量、死根生物量、分解量、生长量和周转率分别0.501、0.035、0 023、0.691t·hm^-2和1.38.同时给出了杨树细根干重损失随分解时间变化的方程:lnx/x₀=0.9515e-^00014t.

关键词: 杨树, 细根, 生物量, 细根周转, 农用地毯, 苹果, 覆盖, 硝酸盐代谢, 根区土壤, 稻草苫

Abstract: The annual biomass,decomposition,growth and turnover of fine roots of poplar and grass roots (≤2.0 mm) in soil layer 0～40 cm were investigated in a northern poplar plantation.The results showed that annual biomass,dead root biomass,decomposition and growth of fine roots of poplar were 2.062,0.746,0.158,2.351t·hm^-2,respectively,and the turnover rate was 1.14 times per year.For grass,annual biomass,dead root biomass,decomposition and growth of roots were 0.501,0.035,0.023,0.691t·hm^-2,respectively,and the turnover rate was 1.38 times per year.Meanwhile the equation for dry weight loss of fine roots of poplar tree over time was presented as following:lnx/x₀=0.9515e-^00014t.

Key words: Poplar tree, Fine root, Biomass, Turnover of fine roots, straw mat, agricultural carpet, root-zone soil, nitrate metabolizing., apple, mulching

中图分类号:

S718.55

李培芝, 范世华, 王力华, 许思明. 杨树细根及草根的生产力与周转的研究[J]. 应用生态学报, 2001, 12(6): 829-832.

LI Peizhi, FAN Shihua, WANG Lihua, XU Siming . Productivity and turnover of fine roots in poplar tree and grass roots[J]. Chinese Journal of Applied Ecology, 2001, 12(6): 829-832.

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