| 黄若展.南方早熟砂梨缺镁黄叶症诊断与矫治[J].中国南方果树,2014,43(4): |
| 南方早熟砂梨缺镁黄叶症诊断与矫治 |
| And yellow leaves south guaranteeing precocious magnesium deficiency disease diagnosis and treatments |
| 投稿时间：2014-01-14 修订日期：2014-03-14 |
| DOI： |
| 中文关键词: 早熟砂梨，缺镁，黄叶症，诊断，矫治 |
| 英文关键词:early ripening pear, magnesium deficiency, yellow leaf disease, diagnosis, treatment |
| 基金项目: |
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| 摘要点击次数: 2259 |
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| 中文摘要: |
| 通过对福建省德化县早熟砂梨“黄叶病株”及“正常植株”叶片及土壤的营养诊断分析：黄叶病株叶片平均含镁量0.131%，极显著低于正常植株0.328%；黄叶症较重的果园土壤交换态镁含量低12.6～24.5㎎/㎏及土壤酸性强pH3.6～4.5，诊断结论砂梨叶片黄化现象为镁素缺乏所致。矫治试验效果，叶面喷施1%硝酸镁3次，可以叶色转绿；12月份土壤基施钙镁磷肥株1.3 kg，翌年5月份后有明显矫治效果。 |
| 英文摘要: |
| through nutritional diagnosis of Dehua County in Fujian province early ripening pear infected and healthy plant leaves and soil analysis were: yellow leaf average magnesium content is 0.131%, significantly lower than normal plants 0.328%; yellow leaf disease heavier soil exchangeable magnesium content of 12.6 ~ 24.5 mg / kg lower and soil acidity pH3.6 ~ 4.5, the diagnostic conclusion sand pear leaf yellowing phenomenon caused by magnesium deficiency. Correction of test results, 3 times foliar application of 1% magnesium nitrate, can leaf color turn green; growing season soil basal application of calcium magnesium phosphate fertilizer plant in May 1.3 kg, has obvious treatment effect. |
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