镁肥在红富士苹果上的应用

Study on the Role of Magnesium Fertilizer in Fuji Apple Production

【目的】生产中,随着果农有机肥的少施甚至不施,仅注重了大量元素氮、磷、钾的施用,忽视了中微量元素钙、镁的施用,使得刚达到盛果期的苹果出现缺镁症状,为此,探究镁肥在红富士苹果生产中适宜的种类和用量以期为镁肥在红富士苹果上的科学施用提供理论依据。【方法】试验以6 a生红富士苹果为试材,在开花前、坐果后及果实着色前追施不同种类和用量的镁肥,调查其对果实可溶性固形物质量分数、单果质量、单株产量等指标的影响。【结果】每株追施400 g钙镁肥,对果实可溶性固形物质量分数明显提高5%,对单果质量、单株产量影响均高于常规施肥,分别提高了6.13 g、4.7 kg。【结论】此次试验,对增施单一镁肥的使用效果不显著,分析原因可能是用量上存在问题,建议增加用量再试验。

【Objective】In planting,with less or even no organic fertilizer,only nitrogen,phosphorus and potassium were applied,while calcium and magnesium fertilizers were neglected,resulting in magnesium deficiency in apples at full fruit stage Therefore,the suitable variety and dosage of magnesium fertilizer in the production of red Fuji apples were studied to provide theoretical basis for the scientific application of magnesium fertilizer in red Fuji apples.【Methods】The 6-year-old Red Fuji apple was used as the test material.Different kinds and amounts of magnesium fertilizer were applied before flowering,after fruit setting and before fruit coloring.The soluble solids content,single fruit weight and yield per plant were investigated.【Results】Topdressing 400 g calcium magnesium fertilizer per plant could significantly increase fruit soluble content by 5%.single fruit weight and yield per plant,which were higher than those of conventional fertilizer and increased by 6.13 g and 4.7 kg.【Conclusion】In this experiment,the effect of single magnesium fertilizer was not significant.The reason may be that there was a problem in the dosage,so it is suggested to increase the dosage.