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叶分析结合缺素症调查和喷施叶肥,初步证明赵县雪花梨树富含钙、镁,缺乏钾、硼、铁和锌,它们的平衡指数分别为149.7、109.5、52.5、26.5、47.6和54.8.喷施叶肥可改善梨树的营养状况.钙和稀土叶肥提高了叶中硝酸还原酶和过氧化物酶活性,并增加了雪花梨果肉的含糖量.建议该地区增施钾肥和微量元素肥料,进一步试验适合当地的叶肥.本工作可供梨树叶分析营养诊断参考.
Leaf analysis combined with lack of disease investigation and spraying of leaf fertilizer, preliminary showed that the snow-rich pear tree in Zhaoxian County is rich in calcium and magnesium, lack of potassium, boron, iron and zinc, their balance index was 149.7,109.5,52.5,26.5,47.6 And 54.8 spraying foliar fertilizer can improve the nutritional status of pears.Calcium and rare earth fertilizer increased nitrate reductase and peroxidase activity in leaves and increased the sugar content of snowflake pear pulp.It is recommended that the area increase Potash fertilizer and trace element fertilizer, further test suitable for local leaf fertilizer.This work can be used for nutritional analysis of pear leaf analysis reference.