| 速生阶段西南桦人工林养分积累及其分配特征 |
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| 引用本文： | 何斌,何纾敏,黄弼昌,周燕萍,卢万鹏,廖倩苑,李远航,舒凡.速生阶段西南桦人工林养分积累及其分配特征[J].东北林业大学学报,2015(3):23-25,42. |
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| 作者姓名： | 何斌 何纾敏 黄弼昌 周燕萍 卢万鹏 廖倩苑 李远航 舒凡 |
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| 作者单位： | 1. 广西大学，南宁，530004;2. 广西天峨县林朵林场;3. 广西大学 |
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| 基金项目： | 国家自然科学基金项目(31160152);广西“十五”林业科技研究项目(桂林科字2007-15) |
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| 摘 要： | 对广西天峨县林朵林场速生阶段(12年生)西南桦(Betula alnoides)人工林的N、P、K、Ca、Mg 5种养分元素的质量分数、积累及其分配特征进行了研究。结果表明:1西南桦不同器官养分质量分数由高到低依次为树叶、树枝、干皮、树根、干材;树叶和干材各元素质量分数由大到小依次为N、K、Ca、Mg、P;树枝、干皮和树根中则是K(或Ca)、N、Mg(或P)。2西南桦人工林养分总储量为1 172.85 kg·hm-2,其中乔木层养分储量占87.62%,灌草层和凋落物层养分储量分别占5.91%和6.47%。3西南桦人工林乔木层养分年净积累量为85.64 kg·(hm2·a)-1,不同养分元素年净积累量由大到小依次为N、K、Ca、Mg、P;每积累1 t干物质需要5种养分元素8.40 kg,其中对N的需求量最大,P最小。
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| 关 键 词： | 西南桦人工林 林木养分 养分储量 |
Accumulation and Distribution of Nutrients in Betula alnoides Plantation at Fast Growing Stage |
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| He Bin;He Shumin;Huang Bichang;Zhou Yanping;Lu Wanpeng;Liao Qianyuan;Li Yuanhang;Shu Fan.Accumulation and Distribution of Nutrients in Betula alnoides Plantation at Fast Growing Stage[J].Journal of Northeast Forestry University,2015(3):23-25,42. |
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| Authors: | He Bin;He Shumin;Huang Bichang;Zhou Yanping;Lu Wanpeng;Liao Qianyuan;Li Yuanhang;Shu Fan |
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| Institution: | He Bin;He Shumin;Huang Bichang;Zhou Yanping;Lu Wanpeng;Liao Qianyuan;Li Yuanhang;Shu Fan;Guangxi University;Linduo Forest Farm of Tian’e County; |
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| Abstract: | We studied the contents, accumulation and distribution of the nutrient elements (N, P, K, Ca and Mg) in B.al-noides plantation at fast growing stage (12-year-old) in Tian’e Linduo Forestry Farm of Guangxi , China.Changes in nutri-ent contents for different organs in the same B.alnoides were in the descending order of leaves , branch, stem bark, root and stem wood.The descending order of nutrient element content was N , K, Ca, Mg, P in leaves and stem, and K or Ca, N, Mg or P in branch, stem bark and root.The total nutrient storage in B.alnoides plantation was 1 172.85 kg/hm2.Of the total storage of nutrients , 87.62%was distributed in arbor layer , 5.91%at herb and shrub layer , and 6.47%at standing litter layer.The annual net accumulation of nutrient elements of B.alnoides plantation was 85.64 kg/( hm2 · a) , and the descending order of nutrient storage of five kinds of nutrient elements was N , K, Ca, Mg and P.The net production of or-ganic matter per ton needed five elements of 8.40 kg, N element amount was the biggest , and P element was the smallest among five nutrient elements . |
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| Keywords: | Betula alnoides plantation Trees nutrent Nutrient storage |
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