为了弄清不同品种和林分油茶树体主要矿质元素的含量差异，研究分析了普通油茶长林系列6个品种以及不同林龄林分油茶树体中主要矿质元素 N ，P ，K ，Mn 的含量．结果表明：油茶叶片、枝干和根系中 N 的含量最高，其次是 K ，P 和 Mn 的含量最低，且不同品种间 P 和 Mn 含量的变异系数较高，N 和 K 元素含量的变异系数较低．可见，不同品种对 P 和 Mn 元素的吸收和富集能力不同．不同林龄油茶树体 N ，P ，K 的含量也表现出较大差异性，其中1年生油茶树体中 N ，P ，K 的含量较高，随着林龄增大，各元素的含量表现出不同程度的下降趋势．6年生油茶树体中 N ，P ，K 元素的含量较低，而 Mn 元素含量在各个林龄树体中无明显差异．此外，油茶老林中生长势较好的油茶树体中 N ，P ，K 含量较高，而生长势较弱的油茶树体中 Mn 元素含量较高，可见，N ，P ，K 元素含量是影响油茶老林林分树势的重要因素．
Analysis of Mineral Elements in the Plants of Different Oil-Tea Camellia Cultivars and Stands
In order to clarify the differences in main mineral element contents in different cultivars and stands of Camellia oleifera ,N ,P ,K and Mn of six varieties of the Changlin series were determined .The content of N was shown to be the highest in leaves ,branches and roots of camellia ,followed by that of P and K ,while Mn content was the lowest .The coefficient of variance between different cultivars was high for P and Mn and low for N and K ,thus indicating that the capacity of absorption and enrichment of P and Mn vary with different varieties .The contents of N ,P and K differed considerably with camellia tree age :the one‐year‐old trees contained relatively high N ,P and K ,which showed a declining trend with increas‐ing tree age ,and the six‐year‐old trees contained relatively low N ,P and K .In contrast ,little difference was observed in camellia trees of different ages .In addition ,in old camellia forests ,the vigorous growing trees contained more N ,P and K than their poorly growing counterparts .Instead ,the poorly growing trees contained more Mn than the well growing trees ,suggesting that N ,P and K contents are an important fac‐tor affecting the growth vigor of Camellia forest stands .
cultivarforest standCamellia oleiferamineral element
NETL
NSTL
万方数据
维普
