摘要
通过对造林1 a^3 a巨桉幼树的器官生物量调查、器官组织中大量元素N、P、K、Ca、Mg和微量元素Fe、Zn的含量测定及其积累量的分析结果表明:大量元素总含量在各器官中的分布为干韧皮部、叶>枝、根>干木质部,微量元素主要富集于叶和根器官中;单株木器官中大量元素的累积量排序为叶>枝>干韧皮部>根或干木质部>干木质部或根,各养分元素积累量的规律不受林龄的影响,大量营养元素依次为Ca>N>K>Mg>P;微量元素累积量Fe>Zn;林龄1 a^3 a巨桉平均单株木大量元素累积总量分别是12.45 g·株-1、136.19 g·株-1和420.23g·株-1;各养分元素的年净积累量以Ca为最大,N、K养分元素次之,Mg元素较少,P元素最小。
The determination and anaysis were made of the contents of macro-elements （ N,P, K, Ca, Mg） and micro-elements （Fe ,Zn） in organic tissue of 1 to 3 years old Eucalyptus grandis saplings and their biomass. The results showed that the contents of macro-elements in organic tissue were different, their ranking was bark ,leaf 〉 twig,root 〉 stem ,micro-elements were rich in leaf and root, and the accumulated amount of macro-elements in organic tissue of single tree was leaf 〉 twig 〉 bark 〉 root or stem 〉 stem or root,and that of macro-elements in 1 to 3 years old single tree was 12. 45 g,136. 19 g and 420. 23 g, respectively,in which their yearly net accumulation was Ca 〉 N 〉 K 〉 Mg 〉 P,and the accumulation of Fe was much higher than Zn in single tree.
出处
《四川林业科技》
2014年第5期23-28,共6页
Journal of Sichuan Forestry Science and Technology
基金
四川森林生态与资源环境研究重点实验室资助项目"四川省巨桉配方施肥技术研究"
关键词
巨桉
器官组织
养分元素
积累量
Eucalyptus grandis, Organic tissue, Nutrient element, Accumulated amount
