灰木莲人工林营养元素分配及其积累特征  

Accumulation and distribution characteristics of nutrient elements on Manglietia glauce plantation

作　　者：戴军 何斌[2] 肖继谋 覃祚玉[2] 罗柳娟[2] 刘莉[2] 刘红英[2] 

机构地区：[1]广西三门江林场,广西柳州545006 [2]广西大学林学院

出　　处：《林业科技开发》2012年第4期39-42,共4页China Forestry Science and Technology

基　　金：广西科学研究与技术开发计划课题(编号:桂科攻11194008);国家自然科学基金项目(编号:31160152)

摘　　要：对南宁市46年生灰木莲人工林的9种营养元素(N、P、K、Ca、Mg、Fe、Mn、Zn和Cu)的含量、积累量、年净积累量及其分配特征进行了研究。结果表明:灰木莲不同组分的营养元素含量大致为树叶>树皮>树根>树枝>干材。大量元素N、K在树根中的含量最高,P、Mg在树叶中的含量最高,而Ca则在树皮中含量最高;微量元素在各组分中的含量则以Mn最高,Fe、Zn次之,Cu最低。灰木莲人工林营养元素积累总量为1 948.78 kg/hm2,其中乔木层的营养元素积累量为1 715.22 kg/hm2,占林分营养元素积累总量的88.02%;草本层为74.33 kg/hm2,占总积累量的3.81%;灌木层为83.19 kg/hm2,占总积累量的4.26%;凋落物层为76.04 kg/hm2,占总积累量的3.90%。灰木莲人工林营养元素年净积累量为37.32 kg/(hm2·a),各组分营养元素年净积累量排列顺序为干材>树根>树皮>树叶>树枝。The concentration, accumulation, annual net accumulation and distribution of nine nutrient elements, such as N, P,K,Ca,Mg,Fe,Mn,Zn and Cu, were studied in 46-year-old Manglietia glauca stand in the city of Nanning, Guangxi, China. The results showed that the concentration of these nine nutrient elements in different components of Manglietia glauca stand was in the order of leaf 〉 bark 〉 root 〉 branch 〉 stem. The content of N and K were the highest in root, P and Mg were the highest in leaves, and Ca was the highest in bark. The content of Mn was the highest, Fe and Zn was in the mid- dle, and Cu was the lowest. The total nutrient accumulations in 46-year-old M. glauca stand was 1 948.78 kg/hm2 ,within the accumulations of the tree, herb, bush and litter were 1 715.22 kg/hm2, 74. 33 kg/hm2, 83.19 kg/hm2 and 76.04 kg/ hm2 , accounted for 88.02% ,3.81% ,4. 26% and 3.90% , respectively. The annual net accumulation of nutrient elements in Manglietia glauca plantation was 37.32 kg/（hm2·a）. The order of annual net accumulation of nutrient elements in different parts of trees was stem 〉 root 〉 bark 〉 leaf 〉 branch.

关 键 词：灰木莲 人工林 营养元素 积累 分配 

分 类 号：S791.270.1[农业科学—林木遗传育种]