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对湖南、湖北砖茶主产区具有代表性的55个茶园165个土样进行了水溶性氟、全氟及pH、有机质和交换性阳离子的测定。同时也测定了上述茶园的茶样水溶性氟。结果表明,湖南、湖北砖茶主产区土壤全氟含量略低于全国水平(440 μg/g),但明显高于世界水平(200 μg/g)。从土层来看,土壤氟含量0~5 cm土层最高,0~20 cm土层次之,20~40 cm土层较低。氟在茶树体内具有较强的累积作用,且茶叶中氟含量与叶子的成熟度有密切关系,茶叶成熟度越高,氟含量越高。土壤中水溶性氟与pH值呈极显著正相关,与有机质呈极显著负相关,与交换性铝、锰呈极显著负相关,与交换性钾、钙、镁、有效态磷呈极显著正相关,与交换性钠呈显著正相关。
A total of 165 soil samples were collected from 55 representative tea farms in Hunan and Hubei Province, and their water-soluble fluorine, perfluoro, pH, organic matter and exchangeable cations were measured. Also measured the tea-like water-soluble tea-like fluoride. The results showed that the content of perfluorinated soil in the main producing area of Hunan and Hubei brick tea slightly lower than the national level (440 μg / g), but significantly higher than the world level (200 μg / g). From the aspect of soil layer, the content of fluoride in soil is the highest in 0 ~ 5 cm soil layer, followed by 0 ~ 20 cm soil layer and lower in 20 ~ 40 cm soil layer. Fluorine has a strong cumulative effect in the tea plant, and the fluorine content in tea is closely related to the maturity of the leaves. The higher the tea maturity, the higher the fluorine content. Soil water-soluble fluorine had a significant positive correlation with pH, a very significant negative correlation with organic matter, a significant negative correlation with exchangeable aluminum and manganese, and a significant positive correlation with exchangeable potassium, calcium, magnesium and available phosphorus Related, and exchangeable sodium was significantly positive correlation.