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于１９８６～１９９２年，对大气氟化物不同浓度的７处梅园，进行了研究，并辅之以模拟试验．结果表明，梅是对大气氟化物反应敏感的植物，其主要受害症状是早期落叶．认为梅正常生长环境的大气氟化物临界浓度为１．０～１．２μｇ／（ｄｍ２·ｄ）；梅叶的氟化物本底值为（１１．２±２．３）ｍｇ／ｋｇ．大气氟化物浓度〔Ｘ，μｇ／（ｄｍ２·ｄ）〕与梅叶含氟量（Ｙ，ｍｇ／ｋｇ）有良好的正相关关系，回归方程表达为Ｙ＝（２．１５±２３．１６）Ｘ，ｒ＝０．８２２．氟化物在梅叶中的积累系数为０．３３，积累方程为ΔＦ＝０．３３ｃｔ．梅叶离区纤维素酶活力与早期落叶有密切关系
From 1986 to 1992, seven plum orchards with different concentrations of atmospheric fluorides were studied, and the simulation experiments were carried out. The results showed that plum is a plant that is sensitive to atmospheric fluoride. Its main symptom is early deciduous leaf. The critical concentration of atmospheric fluorides in normal growth environment is 1.0 ~ 1.2μg / (dm2 · d), and that of plum leaves is (11.2 ± 2.3) mg / kg. There was a good positive correlation between atmospheric fluoride concentration [X, μg / (dm2 · d)] and fluorine content (Y, mg / kg) in Plum leaves. The regression equation was expressed as Y = (2.15 ± 23.16) X, r = 0.822. The accumulation coefficient of fluoride in plum is 0.33 and the accumulation equation is ΔF = 0.33ct. Plum leaf area cellulase activity and early deciduous are closely related