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For high garlic yields, understanding its fertilizer requirements is key

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Garlic is a bulb crop with a high fertilizer demand that is also relatively tolerant of heavy fertilization. It is best grown in sandy loam soil rich in organic matter, with a loose and fertile topsoil, complete nutrition, good water and fertilizer retention, and good aeration. According to research: for every 1000 kg of fresh garlic produced, 4.5-5 kg of nitrogen, 1.1-1.3 kg of phosphorus, and 4.1-4.7 kg of potassium are required, in a ratio of 3:1:3. Therefore, on the basis of fully understanding garlic's growth characteristics and fertilizer requirements, applying scientific fertilization is the key to achieving high-quality, high-yield garlic. According to garlic's growth characteristics and

Garlic is a bulb crop with a high fertilizer demand that is also relatively tolerant of heavy fertilization. It is best grown in sandy loam soil rich in organic matter, with a loose and fertile topsoil, complete nutrition, good water and fertilizer retention, and good aeration. According to research: for every 1000 kg of fresh garlic produced, 4.5-5 kg of nitrogen, 1.1-1.3 kg of phosphorus, and 4.1-4.7 kg of potassium are required, in a ratio of 3:1:3. Therefore, on the basis of fully understanding garlic's growth characteristics and fertilizer requirements, applying scientific fertilization is the key to achieving high-quality, high-yield garlic.

According to garlic's growth characteristics and fertilizer requirements, garlic fertilization should adhere to the principles of giving priority to organic fertilizers with chemical fertilizers as a supplement; giving priority to base fertilizer with topdressing as a supplement; applying coarse fertilizers finely and chemical fertilizers skillfully, so as to maximize the satisfaction of garlic's nutrient needs during its growth and development.

(1) Apply sufficient base fertilizer: Since garlic has shallow roots, few root hairs, and a poor ability to absorb nutrients, it has high quality requirements for base fertilizer (especially when the goal is harvesting garlic scapes and garlic bulbs). It should be based mainly on decomposed barnyard manure or cake fertilizer, combined with a certain amount of phosphorus-potassium compound fertilizer. Generally, apply 5000 kg of high-quality organic fertilizer per mu, 100 kg of cake fertilizer, and 25-35 kg of nitrogen-phosphorus-potassium compound fertilizer.

(2) Apply seedling-promoting fertilizer early: Applying seedling-promoting fertilizer early helps promote rapid root growth and seedling development after emergence, and improves the overwintering performance of autumn-sown garlic. Seedling-promoting fertilizer should be applied about 15 days after emergence. Except for plots with high fertility and sufficient base fertilizer, where it may be omitted, generally 15-20 kg of urea can be applied per mu.

(3) Increase the application of green-up fertilizer: Green-up fertilizer is generally applied in spring when temperatures rise and garlic's heart leaves and roots begin to grow, with 20-30 kg of urea per mu being appropriate.

(4) Apply heavy fertilizer for scape emergence: This should generally be done when bulbils and flower buds have completed differentiation and garlic scapes are forming. Since this is the period of vigorous growth, and both growth volume and fertilizer demand reach their peaks successively, a heavy application is generally required, accounting for about 40%-50% of the total topdressing, with 25-30 kg of nitrogen-phosphorus-potassium compound fertilizer per mu.

(5) Skillfully apply bulb-strengthening fertilizer: Bulb-strengthening fertilizer should be applied 25-30 days after the scape-emergence fertilizer, based mainly on nitrogen fertilizer supplemented with a small amount of phosphorus and potassium fertilizer, to meet the nutrient needs of garlic scape and bulb expansion, generally applying about 15 kg of high-nitrogen compound fertilizer per mu.

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