茂名小良桉树营养元素的测定

为研究茂名小良水保站桉树的化学成分，测定了小良5种桉树的8种营养元素的含量，其中K、Ca、Mg、Cu、Fe、Mn、Zn的含量采用火焰原子吸收光谱法进行测定，P含量采用钼酸铵分光光度法测定。结果表明：同一品种桉树同一器官中各营养元素含量比较，四种大量营养元素含量总体表现为K>Ca>Mg>P，四种微量营养元素含量绝大部分植物以Mn含量最高，Cu含量最低；四种大量元素P、K、Ca、Mg含量都表现为叶最大，枝次之，根和干中的含量较小；而四种微量元素Cu、Fe、Mn、Zn在植物各器官含量的高低排序缺乏一致规律；不同种桉树间的营养元素含量差别总体上缺乏一致规律。

Determination of Nutrient Elements of Eucalyptus in Xiaoliang,Maoming,Guangdong

To study the chemical composition of eucalyptus from Xiaoliang station of water and soil conservation,Maoming. 8 nutrient elements from 5 eucalyptus were determined, among which, K,Ca,Mg,Cu,Fe,Mn and Zn were determined by flame atomic absorption spectrometry, P by ammonium molybdate spectrometry. The results showed that the contents of four macronutrients including P,K,Ca and Mg present K>Ca>Mg>P in the same organs of the same species. Among the four micronutrients, the content of Mn is the highest and Cu is the lowest. Contents of the four macroelements are the highest in leaves, secondary in branches, the lowest in trunk and root. However, contents of the four microelements present no consistent law in different organs in the same species. The law between contents of nutrient elements from different eucalyptus is not consistent with each other generally.