1. Apply organic fertilizer to improve quality: the supply of early nutrients for carrots mainly lies in the base fertilizer, which should be based on pigs, chickens, cows, horse manure and human urine, 2000-2500 kg per mu. The applied organic fertilizer must be fully decomposed, otherwise it is easy to cause deformed roots, affecting its yield and quality.
2. Nitrogen, phosphorus and potassium are used together: nitrogen can promote the growth of branches and leaves and synthesize more nutrients; Phosphorus is conducive to nutrient operation and improve quality, it has a great impact on the initial growth and development of carrots, but has little effect on the expansion of fleshy roots in the future, so it is generally applied in basal fertilizer; Potassium can promote the meristem activity of root cambium and increase yield. Therefore, the three elements can be used together to achieve high yields. For every 1000 kg of carrots produced, 2.4-4.3 kg of nitrogen, 0.7-1.7 kg of phosphorus, and 5.7-11.7 kg of potassium need to be absorbed, with a ratio of 1:0.4:2.6. 1/2 of the nitrogen fertilizer required is applied as basal fertilizer, and the remaining 1/2 can be used as top dressing when the leaf growth period is at its peak and the fleshy root diameter reaches 0.6 cm; all the phosphorus fertilizer required can be applied as basal fertilizer; a part of the potassium fertilizer required is used as basal fertilizer, and the remaining is used as top dressing when the fleshy roots are expanded.
3. Application of micro-fertilizer: carrots absorb more calcium, and when the calcium content is more, the carrot sugar and carotene content will decrease, and it is easy to cause hollow heart disease when calcium is deficient; Carrots do not absorb much magnesium, and the more magnesium they have, the more sugar and carotene they have, and the better their quality. Calcium, magnesium and phosphorus fertilizers can be sprayed once at the seedling stage and leaf growth stage, and 0.1%-0.25% boric acid solution or borax solution can be sprayed twice at the succulent root expansion stage.
Comprehensive data show that carrots absorb 3.2 kg of nitrogen, 1.3 kg of phosphorus and 5 kg of potassium per 1000 kg of carrot produced. Carrots absorb nitrogen and phosphorus greatly, followed by phosphorus, but nitrogen fertilizer should not be too much, otherwise it is easy to cause growth, make the fleshy roots thinner, and reduce the yield.
According to the fertility characteristics and fertilizer characteristics of carrots, their fertilization should follow the principle of basal fertilizer and top dressing, generally on the basis of applying enough rotting organic fertilizer, 25~30 kg of Tianji brand phosphorus and potassium nitrate per mu.
The key points of carrot fertilization technology are introduced here, I hope it will be helpful to everyone. If you want to buy high-quality and high-yield carrot seeds, you can download the seed bank App, and the country's excellent carrot varieties are available for everyone to choose from.
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