海南粗榧(Cephalotaxusmannii Hook.f.)化学元素含量及变异研究  

VARIATION IN CONCENTRATION OF CHEMICAL ELEMENTS IN CEPHALOTAXUS MANNII HOOK.F. AMONG POPULATIONS AND MODULES

作　　者：杜道林[1] 苏杰[1] 郭力华[1] 舒火明[2] 付永川[3] 向志强[3] 

机构地区：[1]海南师范学院生物系,海口571158 [2]海南师范学院化学系,海口571158 [3]西南师范大学生命科学学院,重庆400715

出　　处：《植物生态学报》2001年第1期119-124,共6页Chinese Journal of Plant Ecology

基　　金：国家自然科学基金! (396 6 0 0 18);海南省重点扶持学科"生态学";海南师范学院科研启动基金

摘　　要：利用变异系数和差异显著性检验 ,对海南坝王岭等五个海南粗榧群体植株及其不同器官的 C、H、N、K等15种化学元素分布及变异进行研究。结果表明 :1)海南粗榧 (Cephalotaxus mannii Hook. f.)中的化学元素含量分布总体呈 Ca>K型 ,但枝、茎、根、种子等不同器官却表现为 K>Ca型 ;2 )海南粗榧群体内各化学元素含量的变异系数较大 ,但群体内和群体间基本无显著差异 ;3)海南粗榧不同群体同一器官间元素含量相对稳定 ,变异系数不太大 ,群体不同器官间则呈现显著甚至极显著的差异 。Variation in concentration of fifteen chemical elements was studied in genet and module populations of Cephalotaxus mannii Hook. f. in Hainan. This variation was examined using variance coefficients and difference significance tests. The populations had greater Ca relative to K, but the module populations, branch, stem, root and seed, showed the reverse pattern. The contents of chemical elements had higher variance coefficients within populations but no significant difference among populations. The concentrations of chemical elements were comparably stable and their variance coefficients small in populations of the same genet. Among the different modules of single populations, significant or highly significant differences were observed, though these were not observed in the averages of module populations.

关 键 词：海南粗榧 化学元素 含量 变异 三尖杉科 

分 类 号：Q948[生物学—植物学]