云南茶树良种氟含量变化比较研究

目的]弄清云南不同茶树品种氟的富集特征,为选育低富集氟大叶茶树品种提供依据。方法]以云南省勐海县、昌宁县和思茅区茶树品种园的20个茶树品种1芽4叶为试材,用氟离子选择电极法测定氟含量。结果]这些茶树品种氟含量为15.30～157.60mg/kg,3地均种植的7个茶树品种总体上均以云抗10号氟含量最低。LSD多重比较表明,地区内品种间和品种内地区间氟含量均存在一定差异,7个茶树品种除思茅区外均以云抗10号氟的含量差异最不显著。结论]云抗10号可作为云南氟富集特征研究和大叶种茶树低氟选育工作的对照品种。

Comparative Study of Improved Tea Varieties on Fluoride Content Change in Yunnan

Objective ] The aim was to know the fluoride accumulation characteristics of different tea varieties, and provide a scientific basis for selecting large leaf tea varieties with low fluoride accumulation. Method] The fluoride content was determined by the Method of Fluoride-ion Specific Electrode in four leaves one bud of twenty tea varieties collected from tea varieties garden of Menghai, Changning and Simao in Yunnan province. Result] The results showed that the average content of fluoride of the varieties was 15.30 - 157.60 mg/kg mg/kg in these areas. The average content of fluoride of Yunkang 10 was the lowest in seven tea varieties in Menghai, Changning and Simao as a whole. The LSD multiple comparison results showed that the average content of fluoride was a certain difference among the varieties in the same area and among the areas in the same variety. The average content difference of fluoride of Yunkang 10 was very no significance among seven tea varieties of Menghai and Changning except Simao. Conclusion] Yunkang 10 can be used as control variety with researching fluoride accumulation of large leaf tea and se- lecting low fluorine material in Yunnan.