When is the best time to plant and fertilize carrots? What are the key points of fertilization techniques?

Carrot is a biennial herb widely cultivated in China, showing a long cone shape of red or yellow, so when is the best time to plant and fertilize it? What are the key points of fertilization techniques? The following will be introduced one by one by the editor of Tuliu.com.

When is the best time to plant and fertilize carrots?

Generally different carrot varieties and different fertility land, the yield per mu is different, the general yield per mu varies from 3500 kg to 5000 kg, but mastering the best planting time and fertilization time of carrots is one of the keys to help improve the yield.

1. The planting time of carrots

Carrots can be divided into spring and autumn sowing and planting, the spring sowing time is from late January to early February, and can be harvested in early April; generally, carrots planted in open field can be planted in March-April, and planted in small arched sheds can be sown in early March.

The planting time of carrots in autumn is from May to June, and it can be harvested from July to August.

two。 Carrot fertilization time

The first time was to apply base fertilizer before sowing, the first topdressing was carried out 20-30 days after emergence, the second topdressing was carried out after the seedling was fixed, and the third topdressing was carried out during the root expansion period. In addition, we should pay attention to the late growth of carrots, to avoid too much fertilizer and water and cause split roots.

Second, what are the key points of the best planting and fertilization techniques for carrots?

1. Application of mature organic fertilizer

The early nutrient supply of carrots mainly lies in base fertilizer, which should be based on pig, chicken, cow, horse manure and human urine, and must be fully mature when applied.

two。 Rational preparation and use of fertilizer

The fertilizer application of carrot includes nitrogen fertilizer, potassium fertilizer and phosphorus fertilizer. Nitrogen can promote the growth of branches and leaves and synthesize more nutrients; phosphorus is beneficial to the transport of nutrients and improve the quality of carrots, which has a great influence on the initial growth and development of carrots. Potassium can promote the meristem activity of root cambium and increase yield obviously. Therefore, the application of these three kinds of fertilizers must be used together. in general, the proportion of the three fertilizers is 10:4:26, and phosphate fertilizer is used as base fertilizer, part of potash fertilizer as base fertilizer, and so on, when the fleshy root is enlarged, it is used as topdressing; half of nitrogen fertilizer is used as base fertilizer, the other half is used as topdressing when the leaf growth is in full bloom and the diameter of fleshy root reaches 0.6cm.

3. Supplement of trace elements

Carrots absorb more calcium, more calcium content will reduce carrot sugar and carotene content, calcium deficiency can easily cause hollow heart disease; carrots absorb less magnesium, the more magnesium content, the more sugar content and carotene content, the better the quality. When calcium magnesium phosphate fertilizer is applied in the base fertilizer, it can be sprayed once respectively in the seedling stage and the peak leaf growth stage, and 0.1%-0.25% boric acid solution or borax solution is sprayed twice in the fleshy root expansion stage.

Carrots in addition to fertilization, watering is also very important, generally watering after the seedling, fleshy rhizome expansion period to the pre-harvest period, generally every half a month or so watering, in case of Rain Water more timely drainage.