| 柳杉细根衰老过程中的养分内循环 |
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| 引用本文： | 吴勇,李贤伟,荣丽,刘语欣,罗艺霖.柳杉细根衰老过程中的养分内循环[J].林业科学,2010,46(2). |
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| 作者姓名： | 吴勇 李贤伟 荣丽 刘语欣 罗艺霖 |
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| 作者单位： | 1. 四川农业大学生态林业工程重点实验室,雅安,625014;西华师范大学管理学院,南充,637002
2. 四川农业大学生态林业工程重点实验室,雅安,625014 |
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| 基金项目： | 国家自然科学基金项目(30771717);;国家“十一五”科技支撑项目(2006BAC01A11);;高等学校重点学科博士点专项科研基金(20050626001);;四川省教育厅重点实验室项目(2006ZD006)资助 |
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| 摘 要： | 将柳杉细根剥离土壤,加速细根衰老,测定并分析柳杉细根衰老期间不同根序细根的N,P,K及Ca浓度变化以及N,P,K浓度与Ca浓度比值的变化趋势。结果表明:1)在柳杉细根死亡过程中,N及K存在明显的内循环,Ca内循环不明显,P没有内循环;2)养分内循环首先出现在1级细根,其次是2和3级细根,表明细根衰老和死亡顺序与生长顺序相反;3)养分回输表现为阶段性,1级细根首先回输到2级细根,2级细根再回输到3级细根;4)柳杉细根中N,P,K浓度变化趋势和它们与Ca浓度比值的变化趋势基本一致。
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| 关 键 词： | 柳杉 细根衰老 养分内循环 养分迁移 |
Nutrient Internal Cycling in Cryptomeria fortunei Fine Root with Senescence |
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| Wu Yong,Li Xianwei,Rong Li,Liu Yuxin,Luo Yilin.Nutrient Internal Cycling in Cryptomeria fortunei Fine Root with Senescence[J].Scientia Silvae Sinicae,2010,46(2). |
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| Authors: | Wu Yong Li Xianwei Rong Li Liu Yuxin Luo Yilin |
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| Institution: | Wu Yong~ 1,2 Li Xianwei~1 Rong Li~1 Liu Yuxin~1 Luo Yilin~ 1 |
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| Abstract: | The fine roots of Cryptomeria fortunei were excavated from soil in order to accelerate the root senescence. The concentration changes of N,P,K,Ca in different order fine roots of Cryptomeria fortunei were measured in the course of senescence. The results showed as follows:1) There was obvious inner circle of N and K,however not significant inner circle of Ca,and no any inner circle of P,during dying of the fine roots. 2) The inner circle of nutrients firstly appeared in the 1st order roots,followed by the 2... |
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| Keywords: | Cryptomeria fortunei fine root with senescence nutrient internal cycling nutrient remove |
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