椰子不同叶序4种微量元素含量变化初探

Study on Four Micro-nutritive Element Change Rule in Different Leaf Arrangement of Coconut

根据椰子叶片在树冠上呈旋转轮生的规律,对不同成熟度的叶片进行排序,对叶片数量差异较大的3株植株中不同叶序的Fe、Mn、Cu、Zn这4种微量元素含量进行测定,并对其变化规律进行分析与研究。结果表明:不同植株间4种微量元素含量有显著差异,同一植株上不同叶序间的含量及其变化规律也有所不同;整体上,3～37叶,Fe、Mn、Zn含量呈上升趋势,Cu含量呈下降趋势;4种微量元素中,Fe、Mn含量较大,Zn含量次之,Cu含量最低;Fe变化范围为31.59～187.3 mg/kg,Mn为22.06～221.0 mg/kg,Cu为3.45～9.78 mg/kg,Zn为10.3～50.0 mg/kg。

The change rule of four micro-nutritive elements including Fe,Mn,Cu and Zn in different leaf arrangement of coconut was studied.The results showed that the four micro-nutritive element’s content was different in different trees.On the whole,the content of Fe,Mn,Zn increased while the that of Zn declined from NO.3 leaf to NO.37 leaf.The change scope of Fe,Mn,Cu,and Zn was 31.59187.3,22.06221.0,3.459.78,10.350.0 mg/kg,respectively.