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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.
In order to understand the difference of the content of main mineral elements in different varieties and stands of Camellia oleifera, six varieties of Camellia oleifera Changlin series and the main mineral elements N, P, K, Mn The results showed that the content of N, K, P and Mn in the leaves, branches and roots of Camellia oleifera were the highest, followed by the lowest content of K, P and Mn, and the coefficient of variation of P and Mn in different varieties were higher, while the content of N and K The coefficient is lower.It can be seen that different varieties have different absorption and enrichment abilities of P and Mn.N, P, K contents of oil-tea tree with different age also show great difference, among which N , P and K were higher, with the increasing of age, the content of each element showed a downward trend to some extent.The content of N, P, K in 6-year-old Camellia oleifera was lower, while the content of Mn was There was no significant difference among the tree species in different age groups.In addition, the contents of N, P and K in the oleaginous tea tree with higher growth potential were higher in the old forest of Camellia oleifera, while the Mn content in the oleaginous tea tree with the weaker growth potential was higher , N, P, K elemental content is an important factor that affects the sub-tree stand of Camellia oleifera.