| 高寒沙区中间锦鸡儿人工林细根动态及其周转 |
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| 引用本文： | 张立恒,李清雪,王学全,贾志清,李少华.高寒沙区中间锦鸡儿人工林细根动态及其周转[J].干旱区研究,2011,37(1):212-219. |
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| 作者姓名： | 张立恒 李清雪 王学全 贾志清 李少华 |
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| 作者单位： | 1. 国家林业和草原局 西北调查规划设计院，陕西 西安 710048；;
2. 中国林业科学研究院荒漠化研究所，北京100091；;
3. 青海共和荒漠生态系统定位观测研究站，青海 共和 813005；;
4. 北京市北运河管理处，北京101100; |
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| 基金项目： | 国家自然科学基金项目(31600585)；林业公益性行业科研专项经费项目（201504420）；国家重点研发计划课题项目( 2018YFC0507101-2)资助 |
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| 摘 要： | 通过对青海省治沙试验站3 a、5 a、10 a、16 a和30 a生的中间锦鸡儿（Caragana intermedia Kuang et H. C. Fu）人工林细根生物量的测定分析，了解其细根生物量的垂直分布和动态变化特征以及周转速率。结果表明：① 中间锦鸡儿人工林约41％的活细根和39％的死细根分布在0～20 cm 的土层，38％的活细根和死细根分布在20～40 cm 的土层，21％的活细根和23％的死细根分布在40～60 cm 的土层。② 细根生物量表现出明显的季节动态性，活细根生物量峰值出现在6月和8月或者6月和9月，8月或9月达到最大值；死细根生物量峰值出现8月和9月，也是8月或9月达到最大值。③ 不同林龄人工林细根周转速率分别为：0.53、0.66、0.56、0.73、0.78次﹒a-1。细根生物量和周转率均随林龄增大而增加，随土层加深而减小。
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| 关 键 词： | 高寒沙地 中间锦鸡儿 人工林 细根生物量 细根分布 细根周转 青海 |
| 收稿时间： | 2019-03-18 |
Biomass Dynamics and Turnover of Fine Roots of Caragana intermedia Plantations in Alpine Sandy Land |
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| ZHANG Li-heng,LI Qing-xue,WANG Xue-quan,JIA Zhi-qing,LI Shao-hua.Biomass Dynamics and Turnover of Fine Roots of Caragana intermedia Plantations in Alpine Sandy Land[J].Arid Zone Research,2011,37(1):212-219. |
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| Authors: | ZHANG Li-heng LI Qing-xue WANG Xue-quan JIA Zhi-qing LI Shao-hua |
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| Abstract: | The determination and
analysis of the biomass of fine roots of Caragana
intermedia plantations with 3, 5, 10, 16 and 30 tree-ages at the Qinghai
Province Sand Control Experimental Station were carried out. The purposes of
the study were to accurately understand the vertical distribution, dynamic
variation and turnover rate of the biomass of fine roots of C. intermedia plantations. The results showed that about 41%
living fine roots and 39% dead fine roots of C. intermedia plantations were distributed in soil layer 0-20 cm in
depth, 38% living fine roots and dead fine roots were distributed in soil layer
20-40 cm in depth, and 21% living fine roots and 23% dead fine roots were
distributed in soil layer 40-60 cm in depth. There was an obvious seasonal
dynamic change of the biomass of fine roots, and the peak biomass of living
fine roots appeared in June and August or June and September, and its maximum
occurred in August or September; the peak biomass of dead fine roots appeared
in August and September, and its maximum also occurred in August or September.
The turnover rates of C. intermedia plantations with different tree-ages were 0.53, 0.66, 0.56, 0.73 and 0.78
times·a-1. The biomass and turnover rate of fine roots of C. intermedia plantations increased with
the increase of tree-age, but decreased with the increase of soil depth. |
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