| 厚荚相思人工林微量元素的生物循环 |
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| 引用本文： | 荣薏,何斌,秦武明,赵绍文,罗柳娟,陈玉萍,覃世赢.厚荚相思人工林微量元素的生物循环[J].东北林业大学学报,2009,37(12). |
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| 作者姓名： | 荣薏 何斌 秦武明 赵绍文 罗柳娟 陈玉萍 覃世赢 |
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| 作者单位： | 1. 广西大学,南宁,530004
2. 广西林业勘测设计院 |
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| 基金项目： | 广西自然科学基金项目，广西教育厅科研基金项目 |
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| 摘 要： | 对广西高峰林场1.5～4.5年生厚荚相思人工林5种微量元素(Fe、Mn、Cu、Zn和B)的质量分数、积累、分配和生物循环进行了研究.结果表明:厚荚相思不同器官的微量元素质量分数差异较大,以树叶所含有的质量分数最高,其次是树皮、树枝和树根,树干最低;各器官中微量元素质量分数以Mn和Fe最高,Cu最低.厚荚相思人工林林分微量元素积累量为3.749～14.961kg·hm~(-2),随生长过程中生物量的增加而增大;其中乔木层微量元素积累量占34.20%～41.22%,林下植被层和地表现存凋落物层微量元素积累量分别占25.31%～44.89%和16.78%～33.47%.4个林龄林木各组分微量元素年净积累量分别为0.959、1.070、1.031和1.357kg·hm~(-2)·a~(-1),年吸收量分别为1.422、3.778、4.506和4.792kg·hm~(-2)·a~(-1),年归还量分别为0.463、2.709、3.474和3.435kg·hm~(-2)·a~(-1),利用系数分别为0.989、1.413、1.248和0.777,循环系数分别为0.326、0.717、0.771和0.717,周转期分别为3.107、0.987、1.039和1.796a.因此,厚荚相思人工林微量元素利用率较低,归还速率较快,周转期较短,有利于林地地力的恢复、维持和提高.
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| 关 键 词： | 厚荚相思人工林 微量元素 生物循环 |
Biological Cycling of Microelements in Acacia crassicarpa Plantation |
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| Rong Yi,He Bin,Qin Wuming,Zhao Shaowen,Luo Liujuan,Chen Yuping,Qin Shiying.Biological Cycling of Microelements in Acacia crassicarpa Plantation[J].Journal of Northeast Forestry University,2009,37(12). |
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| Authors: | Rong Yi He Bin Qin Wuming Zhao Shaowen Luo Liujuan Chen Yuping Qin Shiying |
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| Institution: | Rong Yi,He Bin,Qin Wuming,Zhao Shaowen,Luo Liujuan,Chen Yuping(College of Forestry,Guangxi University,Nanning 530004,P.R.China),Qin Shiying(Guangxi Forestry Survey , Planning Institute) |
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| Abstract: | An experiment was conducted to study the content,accumulation,distribution and biological cycling of five microelements (Fe,Mn,Zn,Cu and B) in 1.5-year-old to 4.5-year-old Acacia crassicarpa plantations in Gaofeng Forest Farm of Guangxi Province.Results showed that contents of these five microelements in different organs of A.crassicarpa were in the order of leaf>bark>branch>root>stem.The contents of Mn and Fe were the highest,while that of Cu was the lowest in various organs of A.crassicarpa.The total accu... |
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| Keywords: | Acacia crassicarpa plantations Microelements Biological cycling |
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