When is the best time for topdressing garlic? What kind of fertilizer is the best? What are the taboos?

In the years when the market price of garlic continues to rise, growing garlic has become popular. Many farmers want to plant or plant more garlic to increase their income. However, when growing garlic, we must pay attention to the degree of fertilization. So, when is the best time to topdressing garlic? What fertilizer should be applied to garlic? What are the matters needing attention in applying fertilizer to garlic? Let's take a look at it.

Although there is seed valve nutrition in the growing period of garlic seedlings, topdressing should be applied in order to promote the growth of garlic seedlings and increase the nutritional area of garlic seedlings. As the ability of garlic root to absorb water and fertilizer is weak, quick-acting fertilizer should be applied to topdressing so as to avoid leaf tip yellowing. Garlic topdressing is usually 3 or 4 times.

Promoting Seedling Fertilizer in the period of topdressing garlic

After the garlic comes out of the seedlings, apply a light human feces and urine to extract the seedlings, and avoid the application of ammonium bicarbonate to prevent the seedlings from being burned.

The heyday and fatness of topdressing garlic

60-80 days after sowing, re-apply mature human and animal fertilizer plus chemical fertilizer, 1000-1500 kg per mu of manure, 10 kg of ammonium sulfate, 5 kg of potassium sulfate or potassium chloride. To achieve early-maturing varieties early, late-maturing varieties late, in order to promote seedling growth, stems and leaves stout, to rotten mother when less yellow tip or not yellow tip.

Pregnant bolting Fertilizer in the period of topdressing garlic

After planting the rotten mother of garlic, the flower buds and scale buds differentiate into the elongation stage of the flower stem one after another. In this period, the old roots aged, the new roots occurred in large numbers, at the same time, the stems, leaves and garlic bolts also elongated rapidly, and the garlic began to expand slowly, so it needed more nutrients, so it should be re-applied 10-15 kg of available potassium and nitrogen fertilizer (compound fertilizer is better). It was applied about the first half of the present tail (the short bolting in the lower part of the pseudostem can be observed) to meet the needs and promote the garlic bolting to grow quickly and vigorously.

The expansion of garlic in the period of topdressing garlic

For early-maturing and early-middle-maturing varieties, because the temperature is not high when garlic is inflated, the expansion period of garlic is correspondingly longer. in order to promote garlic fatness, quick-acting nitrogen and potassium fertilizer should be applied before garlic stalk harvest. Such as nitrogen and potassium compound fertilizer 5-10 kg per mu, if only urea, about 5 kg. Do not apply too much, otherwise it will cause the young buds of garlic cloves to turn green, grow leaves again and consume the nutrients of garlic cloves.

Before garlic stalk harvest in the period of topdressing garlic

Topdressing should be carried out before garlic stalk harvest, and there are rich nutrients to promote garlic expansion after garlic stalk harvest. If topdressing is carried out after garlic stalk harvest, it is easy to lead to green plants and reduce yield. If the soil is more fertile and the garlic leaves are fat and dark, there is no need to apply expansive fertilizer. Due to late bolting and high temperature, mid-and late-maturing varieties generally harvest garlic about 20-25 days after bolting, so they can also avoid chasing inflated fertilizer.

What kind of fertilizer should be applied to garlic

In the whole growth period, according to the fertilizer characteristics and growth trend of garlic, garlic with garlic head and garlic moss as the target products generally need topdressing for 2-3 times. The first time in the mother stage (4-5 leaves) mainly N fertilizer, urea 15-20 kg per mu; the second time in the bulb expansion stage (9-10 leaves), that is, garlic mu will be exposed to bud re-application, urea 10-15kg per mu, potassium sulfate compound fertilizer (15:15:15) 30-40 kg; the third time, about 50% potassium sulfate compound fertilizer (15:15:15) 15-20kg/ mu. Garlic with garlic seedlings as the target product is only treated with mother fertilizer, and topdressing is prohibited 30 days before garlic seedlings are harvested. Each fertilization is combined with irrigation.

In addition, in the first ten days of April in the second year of garlic planting, combined with watering strong seedlings, urea 10kg, a quick-acting fertilizer, was applied every 667m2. In the middle of April, every 667m2 was sprayed with 0.5kg potassium dihydrogen phosphate dissolved in 50kg water.

Taboos on fertilization of garlic

Garlic is a fertilizer-tolerant crop. On the basis of applying sufficient base fertilizer, topdressing is still needed in spring. The total amount of topdressing in high-yield fields is controlled at 12.5 kg of pure nitrogen and 5 kg of potassium. Fertilization should grasp the nutritious growth period (first and middle April) is the maximum efficiency period of nitrogen fertilizer, garlic expansion period (Grain Rain? The Beginning of Summer) is the maximum efficiency period of potash fertilizer, and nitrogen is the main nutrition in the leaf formation stage, and the earlier the nitrogen deficiency is, the greater the yield reduction is. In the expansion period of garlic, potassium deficiency had little effect in the early stage and great influence in the later stage. The elongation period of garlic bolting is the period of maximum absorption of nitrogen, phosphorus and potassium.

Garlic is a sulfur-loving crop. Allicin is mainly a disulfide compound. Most of the proteins in garlic contain sulfur, which plays an important role in improving the quality of garlic. At the same time, the study shows that only when the fertilizer N ∶ S is close to the optimal value, the nitrogen and sulfur absorbed by the plant can be used most effectively. N ∶ S in garlic is about 12 ∶ 1. The utilization rate of sulfur in calcareous soil in the north is 2%? 3%, and easy to be fixed as calcium sulfate, nitrogen utilization rate of 30%? 35%. The best N ∶ S is 4 ∶ 5. Sulfur can not be reused in garlic. It is necessary to supplement sulfur in the middle stage of growth in order to maximize the fertilizer effect. According to the demand for nitrogen and sulfur in garlic, 40% nitrogen and sulfur fertilizer (N ≥ 17.5%, S ≥ 22.5%) was selected. Its fertilizer effect is long and quick-acting complementary, containing fulvic acid plays an important role in promoting garlic root growth, improving disease resistance and fertilizer utilization efficiency, and can promote the combination of root maintenance, avoid premature senility and increase yield.

Supplementary application of green fertilizer: garlic can take advantage of rain and snow weather to sprinkle 40% nitrogen and sulfur fertilizer 15 kilograms.

Re-application of seedling fertilizer: in the first ten days of April, 40% nitrogen and sulfur fertilizer was applied to 20kg / mu to meet the demand for nitrogen and sulfur for the exuberant growth of garlic.

Good application of expansion fertilizer: 15 kilograms of high-nitrogen and high-potassium fertilizer was applied with water to accelerate the expansion of garlic.