How to prevent one-headed garlic

1, autumn sowing garlic immediately ploughed the land after the previous harvest, ploughing depth of more than 28 cm, intensive ploughing and raking, leveling the bed. The width of the border should be 1.5 to 2 meters, and the length of the border should not exceed 30 meters. For the convenience of watering, it is better to use 20-25 meters. Garlic is a shallow root crop with shallow roots, weak fertilizer absorption and high quality of base fertilizer, so it is necessary to choose full-effective and high-quality organic fertilizer. The use of raw dung should be fully cooked, mashed and poured evenly before application, so as to prevent fermentation in the field, causing damage to garlic maggots and affecting the growth and development of seedlings. Generally apply fully mature high-quality organic fertilizer 5000kg / kg, and calcium superphosphate 40kg / kg, potassium sulfate 25kg / kg, garlic special compound fertilizer 5kg / 10kg. For acidic soil, 100,150kg quicklime was applied before cultivated land to neutralize acidity.

2. Choose to grow garlic. Growing garlic is the main source of nutrients in the seedling stage of garlic, and the seedling stage of garlic is as long as 160-180 days, so the size of growing garlic has a great influence on the product quality. That is, the larger the seed valve is, the stronger the plant is, and the heavier the garlic is. Therefore, according to the characteristics of the variety, the plant should be selected in the field first, and the clove should be selected again before sowing, and the white, fat, disease-free and injury-free garlic cloves should be selected as garlic. Generally choose between 70 and 130 cloves per 500 grams of garlic cloves. Under the same cultivation conditions, the plant height, the number of leaves, the number of scale buds, the weight of garlic bolts and garlic heads were higher than those of small garlic cloves, and it was not easy to produce single garlic when using such cloves as seeds.

3. Strengthen the field management of garlic in the middle and later stage, topdressing and watering in time to meet the needs of garlic bulb differentiation. After the Spring Festival, diammonium phosphate is generally applied 25 kilograms, potassium sulfate 15 kilograms, depending on soil moisture and weather conditions timely watering.

4. Garlic should be planted in neutral soil, otherwise, if the soil is too alkaline, that is, the PH value is too large, there will be more single-headed garlic.