Fruit trees are highly productive and high quality year after year, and adequate fertilizer should be used as a guarantee. If fertilization is insufficient, fruit size will be smaller, yield will be reduced, and the quality will be worse. The phenomenon of large and small fruit trees will be serious. So, how much fertilizer is appropriate for fruit trees? According to Bao Mingsheng, Jinan City Forestry Bureau, the amount of fertilizer applied to fruit trees should meet the demand for fruit production.
Bao Mingsheng pointed out that through experiments conducted by scientific research departments, it is necessary to produce 0.4 kg of nitrogen, 0.26 kg of phosphorus, and 0.55 kg of potassium for every 100 kg of apples produced. Calculated according to an apple orchard producing 5000kg per acre, it requires 23kg of nitrogen, 13kg of phosphorus, and 27.5kg of potassium. At the same time, it is demanded that the content of organic matter in the soil is rich, and all kinds of elements in the middle and micro are comprehensive In accordance with the above requirements, an apple orchard with an acreage of 10,000 kilograms (5,000 kg) per mu will require more than 6,000 kg per mu per year if fermented and cooked pig manure and sheep manure (adding soil and straw hoeing) are used. If fermented and decomposed pure (wet) cow dung, sheep dung, pig manure, more than 3000kg per mu need to be used each year. If pure (wet) human feces and chicken feces are fermented and fermented, 2000 kg or more per mu will be required per year (the chicken droppings in chicken farms contain more salt, and fruit trees will be unfavorable for consecutive years). If soybean cakes and cottonseed cakes are applied, 800-1000kg per mu need to be used each year. If applying dandelion brand 12% bio-organic fertilizer, it needs more than 500kg per mu per year. If chemical fertilizers are applied, due to nitrogen volatilization, leaching loss, fixation of phosphate fertilizers, and potassium fertilizers, 120 kg of urea, 200 kg of diammonium phosphate, and 110 kg of potassium sulfate need to be applied per acre, together with a small amount of trace elements.
In particular, Bao Mingsheng emphasized that organic or inorganic fertilizers should be used in combination with organic and inorganic fertilizers in orchards with weak soil or weak tree vigor. While applying high-quality, high-quality organic fertilizers, 20 kg of urea and 30 kg of potassium sulfate should also be added for each mu.
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