It is necessary to understand the characteristics of fertilizer requirement for garlic to achieve high yield.

Garlic is a bulb crop which needs a large amount of fertilizer and is more tolerant to fertilizer. it is suitable to be cultivated in sandy loam soil which is rich in organic matter, loose and fertile soil surface, comprehensive nutrition, good water and fertilizer retention and ventilation. According to the study: for every 1000 kg of fresh garlic, it needs 4.5kg of nitrogen, 1.1kg of phosphorus and 4.1kg of potassium, the proportion is 3:1:3. Therefore, on the basis of fully understanding the growth characteristics and fertilizer requirements of garlic, scientific fertilization is the key to achieve high quality and high yield of garlic. According to the growth characteristics and fertilizer demand characteristics of garlic, the fertilization principles of organic fertilizer, chemical fertilizer, base fertilizer, topdressing, coarse fertilizer and chemical fertilizer should be adhered to in order to meet the needs of nutrient elements in the growth and development of garlic. ⑴ application sufficient base fertilizer: because the garlic root system is shallow, the root hair is few, the fertilizer absorption ability is poor, so the quality requirement of the base fertilizer (especially the harvest of garlic moss and garlic for the purpose) is higher, should be based on the mature barnyard manure or cake fertilizer, with a certain amount of phosphorus and potassium compound fertilizer, generally 5000 kg of high quality organic fertilizer per mu, 100kg of cake fertilizer, 25-35kg of nitrogen, phosphorus and potassium compound fertilizer. Early application of seedling-promoting fertilizer in ⑵: early application of seedling-promoting fertilizer is beneficial to promote rapid rooting and seedling growth after emergence and improve the overwintering performance of autumn-sown garlic. Seedling promotion fertilizer should be carried out about 15 days after emergence. Except for those with high fertility and sufficient base fertilizer, seedling promotion fertilizer can not be applied, generally 15-20 kg of urea can be applied per mu. ⑶ increased application of returning green fertilizer: returning green fertilizer is generally applied when the temperature rises in spring and the heart leaves and roots of garlic begin to grow. It is appropriate to apply 20-30kg urea per mu. ⑷ re-application of moss fertilizer should be carried out when the differentiation of scale bud and flower bud and the breeding of garlic moss are completed. As the growth boom has entered at this time, the growth and fertilizer requirements have reached the peak, so it is generally required to re-apply, accounting for about 40% of the total topdressing, accounting for about 50% of the total topdressing, and applying 25-30 kg of nitrogen, phosphorus and potassium compound fertilizer per mu. ⑸ skillfully apply Zhuangtou fertilizer: Zhuangtou fertilizer should be carried out 25-30 days after bolting fertilizer application, Zhuangtou fertilizer is mainly nitrogen fertilizer, combined with a small amount of phosphorus and potassium fertilizer, in order to meet the nutrient needs of garlic bolting and garlic expansion, generally applying high nitrogen compound fertilizer about 15 kg per mu.