Garlic is widely cultivated in all parts of China. Its fertilization should adhere to the principle of “organic fertilizer, supplemented by chemical fertilizer, base fertilizer, supplemented with topdressing, coarse fertilizer and fine fertilizer, and skillful application†according to the characteristics of growth and development, fertilizer requirement and fertilizer absorption. In order to maximize the need for nutrients during growth and development, let's take a look at what fertilizers to grow garlic!
What kind of fertilizer is used to grow garlic? Garlic is a crop with a large demand for sulfur. It contains a large amount of sulfur-containing spicy substances. During the growth process, the demand for nitrogen, phosphorus and potassium nutrients is the highest, followed by nitrogen and less phosphorus. In order to improve the yield and quality of garlic, the reasonable combination of potassium and sulfur is essential. Therefore, in the fertilization, according to the basic conditions of the soil, the main production of N, P, K, S content of about 40% of the special fertilizer, usually with urea, monoammonium phosphate, superphosphate, potassium sulfate plus other trace elements to make.
What kind of fertilizer does the garlic need?
1. Nitrogen: The absorption of nitrogen in garlic during the winter is low, and will gradually increase in the future, reaching a peak in the bulb expansion period, and the absorption of nitrogen before the differentiation period accounts for 30% of the total absorption.
2. Phosphorus: The absorption of phosphorus by garlic before wintering is very small, and it is less when it enters the wintering period. The absorption of phosphorus increases gradually from the regreening stage, and the amount of phosphorus absorbed during the differentiation of the bolting stage is the largest, accounting for the total phosphorus. 52.1% of the amount.
3. Potassium: The amount of potassium absorbed by garlic in the early seedling stage accounted for 10.5% of the total potassium, and the wintering period was less. The absorption of potassium in the regreening period accounted for 26.7% of the total amount, and the bulb expansion period accounted for 45% of the total potassium absorption during the whole growth period. %about.
How to fertilize garlic?
1. Fertilization principle: Garlic fertilization should be scientifically and rationally fertilized according to the soil fertility level and the demand of different growth stages of garlic, and grasp the principle of fertilization of “pre-light, medium and heavy after supplementâ€, not only to prevent excessive prosperity in the early stage, but also to avoid the late stage. Defertization and premature aging.
2, soil preparation fertilization: garlic should be combined with the ground preparation before the planting of the base fertilizer, increase the application of farmyard manure 2500 ~ 3000 kg per mu, 40-75 kg of chlorine-based compound fertilizer and ferrous sulfate, manganese sulfate, borax, zinc sulfate Copper sulfate is 1.5 to 2 kg each.
3, the application of fertilizer: garlic in the normal climate, the garlic in the green period is generally not field management, the first top dressing should be placed in the jointing stage, can be chased nitro compound fertilizer 20 ~ 25 kg, interval 15 ~ 20 The sky will chase the second fertilizer, and the amount of mu will be about 20 kg.
4, the application of differentiation fertilizer: garlic into the differentiation of the bolting period, vegetative growth and reproductive growth at the same time, the demand for phosphorus is strong, wait until the garlic moss outcrop (now tail) acres of high-phosphorus high-potassium compound fertilizer 15 ~ 20 kg, dissolved first Apply again.
5, the top of the top dressing: garlic root dressing should be carried out before 11 am or after 4 pm on sunny days, using 2 kg of calcium or 1 kg of sulfur-based compound fertilizer for 50 hours with 50 kg of water, take its clear liquid spray 1 In the middle and late stages, 1 to 2 foliar sprays can be applied.
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