1, base fertilizer and its application before sowing soil fertilizer combined with ploughing called base fertilizer, also called base fertilizer. Mainly organic fertilizer, chemical fertilizer with slower fertilizer effect can also be used as base fertilizer. The method of applying basal fertilizer includes spreading, applying, layering and mixing. Spreading is to spread the fertilizer evenly into the field and spread it in the soil tillage. The application is to first ditch the field and apply the fertilizer into the ditch to cover the soil. The concentrated fertilization materials are used with less amount and high fertilizer efficiency; the combined layered application is combined with deep plowing to apply organic fertilizers into deep layers, and then the high-quality fertilizers and quick-acting fertilizers are applied to the soil upper layer through cultivated land. Stratified application can provide nutrients for pasture and forage crops, but also can promote the rapid maturation of soil; production often uses mixed manure and green manure. Fertilizer decomposition is slow, fertilizer effect is late, green manure is decomposed quickly, and fertilizer efficiency is also fast. The mixture of the two can be used to adjust each other and supply sufficient nutrients for a long time. 2. Seed Fertilizer and Its Application Fertilizer applied at the same time as seeding is called seed fertilizer. Methods for applying seed fertilizers include: ditching and seeding, seeding and transplanting, and seeding and cutting. The particle application method produces fertilizer particles and seeds sowed simultaneously into the soil, or the seed fertilizers and seeds are separately loaded into the fertilizer box and the seed box and sowed into the soil. The seed and seed fertilizers are mixed and mixed into the soil after mixing. For example, plant ash or decomposed manure and seeds (roots, tubers, etc.) are mixed and sowed into the soil. 3. Top dressing and its application According to the needs of pasture and forage crops, the fertilizer applied during the growth and development of pasture and forage crops is called top dressing. Fertilizers for topdressing mainly include inorganic quick-acting fertilizers supplemented with decomposed human waste or manure. There are several methods for top dressing, such as spreading, spraying, spraying, spraying with water and top dressing. The concentration of fertilization outside the root should not be too high, so as not to hurt the crop, when applying trace elements, apply 30-70 grams per mu.
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