1、 The cultivation season and variety selection of carrots in China are mostly in summer and autumn, and timely sowing is an important condition for obtaining high yield and quality. Sowing can be done in the northeast region from late June to late July.

The selected varieties vary depending on the sowing period. The selection of seeds during summer and autumn sowing can be based on the following principles:

1. Choose varieties that have been successfully cultivated in the north or have a larger cultivation area.

2. Choose popular and easy to sell varieties in the market.

3. Choose varieties with strong adaptability and moderate growth period.

4. Choose varieties with good quality, high nutritional content, and suitable for processing.

2、 Soil selection and fertilization of carrots require high soil quality. It is recommended to choose sandy loam or loam soil with a deep plow layer, loose soil texture, and good drainage. Generally, the preceding crop is onion stubble, cabbage stubble, grain crop, etc.

The cultivation method is generally ridge planting. Before land preparation, shallow tillage and stubble removal should be carried out first, and then base fertilizer should be applied. Generally, 3000-4000 kilograms of decomposed organic fertilizer, some plant ash or 1-2 kilograms of biological potassium fertilizer should be applied every 666.7 square meters. It is best to add 30% chicken manure to the organic fertilizer. Finally, dig deep and ridge. If the fertilizer is insufficient, strip application can be carried out, that is, breaking the ridge and clamping the fertilizer, with a width of 65-70 centimeters.

3、 The planting and post planting management in the north mostly adopts the planting method of ridge planting and strip sowing. A trench with a width of 20-25 centimeters and a depth of 2-3 centimeters is opened at the top of the ridge, and the seeds are evenly scattered in the trench. Generally, the amount of seeds used is 300 grams per 666.7 square meters. To ensure even sowing, an appropriate amount of fine sand can be added to the seeds. After sowing, cover 1-2 centimeters of soil, and then press and water them. In order to maintain moisture in the soil and prevent high temperatures caused by sunlight exposure, after sowing, some wheat straw or straw can be covered on the ridge, and the covering grass can be gradually removed after emergence.

Carrots have a long seedling period and are in the hot and rainy season. Various weeds grow quickly, and herbicides can be sprayed after sowing to prevent weed growth. Using 33% "Shi Tian Bu" emulsifiable concentrate to spray 150 milliliters and 75 kilograms of water on the border every 666.7 square meters has a very good effect.

Before setting the seedlings, it is necessary to perform two rounds of thinning. The first thinning should be done when the seedlings have 2-3 leaves. Any seedlings that grow abnormally, are weak, or are too densely sown should be removed, and the spacing between the seedlings should be 3 centimeters; The second thinning is carried out when the seedlings have 3-4 leaves, with a spacing of 6 centimeters between the seedlings. Every time when thinning seedlings, it is necessary to combine with intermediate tillage to loosen the soil. Weeding is still necessary after the first thinning, and herbicides can be used in the same way as after sowing.

4、 Irrigation and fertilization of carrots have strong drought resistance and require less fertilizer than other crops. However, in order to produce high-quality and high-yield products, it is necessary to strengthen fertilizer and water management.

After sowing and during the entire seedling period, if there is no rain or drought, the soil should be continuously watered to keep it moist. After the seedlings are fully grown, the water requirement for the seedlings is not high, and it is not advisable to water them too much. The soil should be wet and dry to facilitate root growth and prevent seedlings from growing excessively. The seedling stage is during the rainy season. After heavy rain, it is necessary to drain the water in a timely manner. After setting the seedlings, it is necessary to water them once and carry out intercropping and squatting. When the fleshy roots begin to expand, the seedling should be stopped. From the time the fleshy roots expand until 15 days before harvest, they should be watered in a timely manner to keep the soil moist and promote the expansion of the fleshy roots.

During the seedling stage of carrots, the amount of fertilizer required is not large, and if the base fertilizer is sufficient, topdressing is generally not considered. If topdressing is needed, it can be combined with irrigation after the second interval of seedlings to apply decomposed organic fertilizer, or urea can be applied, with 10 kilograms applied every 666.7 square meters to promote seedling growth. After the fleshy roots expand, the amount of fertilizer required increases. Fertilization increases with the weight of water. Potassium fertilizer should be added to the decomposed organic fertilizer, which can be applied at a rate of 10 kilograms of potassium sulfate per 666.7 square meters or 20 kilograms of compound fertilizer per 666.7 square meters.

Perform the final intertillage before sealing the ridges in the leaf clusters, and cultivate the fine soil to the top of the roots to prevent them from expanding and exposing the ground, resulting in green heads that may affect the quality.

5、 The time from sowing to harvest for harvesting and storing carrots varies depending on the growth period of the variety. Early maturing varieties take 80-90 days, while mid late maturing varieties take 100-140 days. Generally speaking, when the fleshy roots are fully expanded and meet the requirements of the product, they can be harvested and put on the market. If harvested too early, the fleshy roots are not fully expanded, resulting in low yield and poor quality. Harvesting too late can easily lead to corking and reduce quality.