油茶苗期生物量积累及营养分配规律研究  

Mechanism of biomass accumulation and nutrient distribution in Camellia oleifera at seedling growth stage

作　　者：唐健[1] 李娜[1] 欧阳洁英 曹继钊[1] 覃其云[1] 

机构地区：[1]广西林业科学研究院,南宁530003 [2]广西国营派阳山林场,南宁532504

出　　处：《南方农业学报》2011年第8期964-967,共4页Journal of Southern Agriculture

基　　金：广西林业厅招标引进项目(桂林科字[2010]第2号)

摘　　要：【目的】了解油茶苗期不同器官的生物量积累及营养元素分布情况。【方法】对150株油茶苗期的各种生长性状指标、生物量及营养元素含量进行测定。【结果】油茶苗期各单株生物量均以地上部分占绝对优势,其中叶片生物量积累最高;不同苗高分级的苗木株数及其生物量近似于正态分布,其中14.00～15.90cm的苗高分级的株数和生物量百分比最高,分别为38.67%和34.19%。在油茶根、茎、叶中均以N含量最高,其次是K和Ca,Cu和B含量最低;N、Mn含量以叶片最高,P、K及Cu、Zn、Fe、B含量均以根部最高。方差分析结果表明,N、K、Mg、Cu、Mn和B元素含量在根、茎、叶中的差异达到显著水平。【结论】油茶苗期叶片生物量积累最高,单株生物量随幼苗的生长而明显增加;不同器官对各营养元素的吸收存在显著差异,该结果可为油茶苗期施肥提供参考。[Objective]The present experiment was conducted to study the mechanism of biomass accumulation and distribution of nutrients in Camellia oleifera at seedling growth stage. [Method]The growth indicators and biomass and nutrient contents of leaf, stem and root of 150 Camellia oleifera plants were determined at seedling growth stage. [Result]The results showed higher biomass in aboveground plant parts, amongst which leaves had the highest biomass accumulation. The seedlings were grouped into various grades according to their length, amongst these groups, the seedlings with height ranging from 14.00-15.90 cm were highest in number （38.67%） and their biomass occupied the highest percentage （34.19%）. The root, stem, and leaves of plant were found to accumulate highest N content, followed by K and Ca contents, Cu and B were the lowest. The N and Mn contents showed highest accumulation in leaves, while P, K, Cu, Zn, Fe and B contents accumulated more in the roots. The variance analysis results indicated significant differences in N, K, Mg, Cu, Mn and B contents in root, stem and leaves. [Conclusion]The leaf of Camellia oleifera had the highest biomass at seedling stage and the plant biomass increased significantly with the growth of seedlings. Significantly different uptake and accumulation of different nutrient elements in root, stem and leaves will help in understanding the growth and development of Camellia oleifera in relation to particular element, and provide the reference on fertilization at seedling stage.

关 键 词：油茶 苗期 生物量 营养分配 

分 类 号：S794.4[农业科学—林木遗传育种]