A look at climate fertilization. Summer temperatures are high, decomposition of fertilizers is fast, rainfall is high, and fertilizers are easily lost. When fertilizing, a small number of ways should be taken, and the decomposed farmyard fertilizers can be applied timely and dispersedly. Apply more on sunny days and less on rainy days.
Second, look at soil fertilization. Different soils, fertilization methods are not the same. The light loam soil has good fertilizer and fertilizer properties, and can be applied and reused. Sandy soil can be fertilized many times, but the amount is less to prevent fertilizer waste. Excessively hardened plots pay attention to more organic fertilizers after maturity.
Three see seedling fertilization. To master the principle of “fewer seedlings, stable flowering period, and heavy fruit periodâ€, the main nitrogen fertilizer was used in the early stage, and nitrogen, phosphorus and potassium were used in the middle and later stages. Early maturing cultivars have a short vegetative growth period, and early cultivars must focus on promotion. Late maturing cultivars have a long vegetative growth period, and the early cultivars focus on the control and promotion of binding to allow the seedlings to grow steadily. In the seedling stage of the melons, deterrence water with a concentration of 10% to 15% is generally applied. As the plants grow, they can be gradually enriched. To the late growth period, it can generally be increased to 30% to 40%.
Four to see the type of vegetables fertilization. There are rhizobia-fixing nitrogen in legumes, which requires less nitrogen and phosphate fertilizers; root vegetables and yams need more potash fertilizer; leafy vegetables require more nitrogen fertilizer; fruit and vegetable crops need to be applied on the basis of nitrogen fertilizer. With phosphorus and potassium fertilizers.
Five fertilizer fertilization. Ammonium bisulfate, human fecal urine and other nitrogen fertilizers are acidic and cannot be mixed with alkaline fertilizers such as grass ash to avoid reducing fertilizer efficiency. Superphosphate cannot be mixed with acidic fertilizers. Ammonium bisulfate and urea are in contact with species, stems and leaves, which can cause burns. The urea is used as a top-dressing fertilizer, and its concentration should not exceed 1%. Ammonium chloride and potassium chloride cannot be used on potato and other bogey crops. To the late growth period, it can generally be increased to 30% to 40%.
Six see fertilization. Farmyard fertilizers are slow and generally used as base fertilizers. Fertilizer fertilizer effect is fast, nutrients are incomplete, fertilizer thick easily lead to leggy, only suitable for top dressing and a small amount of base fertilizer. Urea is generally used as topdressing, and should be applied 4~6 days in advance in order to exert its fertilizer effect. Phosphorus fertilizers have a low mobility and are generally used as fertilizers and fertilizers. For topdressing, it is necessary to open the ditch and apply it to the root layer.
Seven days to see fertilization. No fertilization on rainy days, so as to avoid the loss of fertilizer; days bored without fertilizer, foggy days without fertilizer, high temperature without fertilizer, so as not to cause mildew disease, so fertilization should be selected sunny.
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