Fertilization in high temperature season should be seven

At first glance, the temperature of fertilization is high, the fertilizer is decomposed quickly, the rain is high, and the fertilizer is easily lost. When fertilizing, a small number of ways should be adopted, and the decomposed farmyard fertilizer should be applied and dispersed in a timely manner. More sunny days, less rainy days.

Second, look at the different soils of soil fertilization, and the fertilization methods are different. Light loam has good fertilizer and fertilizer performance, and can be applied more and reapplied. Sand loam can be fertilized multiple times, but the amount is less, to prevent fertilizer waste. Excessively compacted and hardened plots pay attention to the organic fertilizer after application.

Thirdly, the seedling fertilization mastered the principle of “small seedling period, stable flowering period and heavy fruit period”. In the early stage, nitrogen fertilizer was the main factor, and nitrogen, phosphorus and potassium were combined in the middle and late stages. The vegetative growth period of early-maturing cultivars is short, and the early stage should focus on promotion; the late-maturing cultivars have long vegetative growth period, and the early focus is on controlling and promoting the combination, so that the seedling stage can grow steadily. The melon seedlings are generally applied with a concentration of 10% to 15% of clear manure water, which can be gradually enriched as the plants grow. In the later stage of growth, it can generally be concentrated to 30% to 40%.

Fourth, look at the types of vegetables, fertilize beans, have rhizobium to fix nitrogen, need less nitrogen fertilizer, need more phosphate fertilizer; root vegetables, yam need more potassium fertilizer; leaf vegetables need more nitrogen fertilizer; fruit vegetables in the application of nitrogen fertilizer On the basis of this, it is also necessary to match phosphorus and potassium fertilizer.

Five look at fertilization fertilization ammonium bisulfate, human excrement and other nitrogen fertilizers are acidic, can not be mixed with grass ash and other alkaline fertilizers, so as not to reduce fertilizer efficiency. Superphosphate or the like cannot be mixed with acidic fertilizer. Ammonium hydrogen sulfate and urea are in contact with seeds, stems and leaves, which may cause burns. Urea is used as a top dressing, and its concentration cannot exceed 1%. Ammonium chloride and potassium chloride cannot be used on chlorine-removing crops such as potatoes. In the later stage of growth, it can generally be concentrated to 30% to 40%.

Six look at fertilizer fertilization farmer fertilizer is slow, generally used as a base fertilizer. Fertilizer fertilizer is fast, nutrients are incomplete, fat is easy to cause long, only suitable for topdressing and a small amount of base fertilizer. Urea is generally used for top dressing, and should be applied 4 to 6 days in advance in order to exert fertilizer efficiency. Phosphate fertilizer has small mobility and is generally used as seed fertilizer and top dressing. For topdressing, it is necessary to ditch and apply it to the root layer.

Seven look at the day of fertilization and rain, do not fertilize, so as to avoid the loss of fertilizer; day boring without fertilization, no fertilization in foggy days, high temperature without fertilization, so as not to cause the incidence of mildew, so fertilization should be carried out on sunny days.

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