First, base fertilizer. Promoting early (autumn) application is appropriate before the arrival of the peak of autumn root growth. Those who have no irrigation conditions may advance to the late rainy season. The best period is from fruit picking to the end of November, the effect is significantly higher than the spring application. Mainly organic fertilizer, appropriate amount of compound fertilizer containing nitrogen, phosphorus and potassium. The amount of organic fertilizer is based on output, with a yield of less than 1,500 kg per mu, 1 kg of organic fertilizer by 1 kg of fruit, and 1,500 kg of organic fertilizer by 1.5 kg of fruit by 1 kg of fruit. With the application of Red Day Akon series compound fertilizer 2-3 kg / strain or so.
Second, top dressing. 1, because of trees topdressing. Prosperous trees should avoid the new long-distance Wang long-term, to promote "tip stop" (such as apple shoots and autumn shoots long-term stop) fertilizer, fertilizer should pay attention to phosphorus and potassium fertilizers. Weak trees should be top-dressed with fast-acting fertilizers before the prosperous period. Nitrogen-based trees are beneficial to promoting growth. As a result, Zhuangshu should focus on high-yield, high-quality, and robustness. In the bud before the main nitrogen, is conducive to sprouting shoots, flowering fruit. Phosphorus and potassium are the main topdressing fertilizers in the fruit enlargement period, and nitrogen fertilizer is used to accelerate fruit growth and increase sugar and color. Immediately after sowing, the fertilizer will be used to water and restore the tree body and increase the reserve.
2. Topdressing dosage and formula fertilization: According to the characteristics of apple during each growth period, it is divided into three key dressing periods. Top dressings are mainly based on quick-acting fertilizers. Before flowering (bud germ). It is carried out from late March to early April. It mainly meets the needs of nutrients for budding, flowering, fruit setting and shoot growth. With quick-acting nitrogen fertilizer as the main component, each production of 50 kilograms of fruit will be followed by the Red Day Akang series of high nitrogen and potassium compound fertilizer 0.8-1.2 kilograms. Take fruit fertilizer (new tip speed long fat). From about the end of May to the beginning of June, it will promote flower bud differentiation, increase fruit setting rate, increase fruit size and improve fruit quality. For every 50 kilograms of fruit produced, 15,000 kilograms of high-nitrogen, high-potassium compound fertilizers will be applied to the Red Sun Acon. Fruit speed long fat. Generally, applying from late July to late August can promote new roots, increase leaf function, increase fruit weight, increase grade fruit rate and yield, enrich flower buds and tree nutrient accumulation, and increase tree resistance for the coming year. Good foundation. Phosphorus and potassium fertilizers can increase fruit hardness and sugar content, and promote fruit coloring. For every 50 kilograms of fruit produced, 15,000 kilograms of high-nitrogen, high-potassium compound fertilizers will be applied to the Red Sun Acon.
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