1. stubble arrangement and variety selection

According to the Ganzi State Seed Station in Kangding County at the same altitude area planted in the red-skinned radish test, the first season in February 15 to March 5 before sowing the seed, successive sowing period of about 20 days, the variety selection with the original varieties of characteristic characteristics, no pests and diseases of Kangding red-skinned radish species to do the production of seed. The second season in June 20 to July 5 sowing, before and after the sowing period to hold in about 15 days.

2. Soil selection and sowing

Kang Ding red skinned radish should choose a deep layer of neutral or slightly acidic sandy loam, preferably the previous crop is more fertilizer and less fertilizer consumption of vegetable land, the cultivation layer of not less than 30 centimeters, fertile, loose, water retention drainage and irrigation is convenient, the soil does not fit the stone, hard soil and other impurities of the sandy soil. The planting of double-season radish before sowing should be early plowing and deep turning.

(1) planting the first season of radish

Before sowing, we have to tidy up the ground and ridging, generally require a compartment width of 1.2 meters, compartment height of 25 centimeters, compartment ditch width of 30 centimeters, and combined with the ridging and applying sufficient fertilizer, mu into the rotted organic fertilizer 2500 ~ 3000 kg. After sowing should be covered with film to make a small arch, to prevent cold insulation. Small arches 50 ~ 60 cm high, shed width 1.2 meters, hole spacing 30 cm, row spacing 30 cm, 4 rows per ridge. The thickness of the cover 0.5 ~ 1 cm, 3 ~ 5 seeds per hole, single plant seedlings.

(2) planting the second season of radish

The soil is deep tilled and harrowed flat, the whole ground, rows, compartment width 1.5 m, compartment height 20 cm, compartment ditch width 30 cm, the bottom of the full fertilizer, mu into the rotted organic fertilizer 3000 ~ 3500 kg, fertilizer should be mixed with the soil uniformly, so as not to appear radish growth of nutrients are not uniform, or deformity. Planting 5 rows per ridge, hole spacing 30 cm, row spacing 35 cm, 4-5 seeds per hole, cover the soil thickness of 0.5-1 cm, a single plant to stay in the seedling.

3. Field management

(1) to ensure that the seedling is complete

In the week before planting, choose a sunny day to spray herbicide weed control. Seedlings just out of the ground to strengthen the pest control, in the beds of each spray 1 time insecticide, can choose 41% phoxim emulsion 800 ~ 1000 times spray, or 40% of Lesbian (chlorpyrifos) emulsion 1000 ~ 1500 times spray control. Kang Ding red skin radish seedlings should be early, generally between seedlings 2 times, the first time in the plant grows to 2 ~ 3 true leaves, set aside the disease, weak seedlings, choose to stay strong seedlings 2; the second time in the plant grows to 4 ~ 5 true leaves, choose to stay the best growth of the seedlings. In the first season, 4,000 to 4,500 seedlings per mu; in the second season, 3,000 to 3,500 seedlings per mu. The radish planted in small arched greenhouse sunny days should be prevented from high-temperature scorching seedlings, daytime should be timely to the two ends of the shed membrane open ventilation cooling.

(2) weeding, fertilizer, watering

Radish 3 ~ 4 days after sowing generally per mu with ethalfluralin 50 ~ 70 ml for weeding, after the emergence of seedlings timely plowing, combined with soil weeding, after the seedling timely cultivation of roots. According to the field fertility and radish growth can be appropriate foliar fertilizer, the first time in the radish leaf growth period, mu of dung water 2000 kg, the second in the root growth period, dung water 2500 kg. Radish seedlings root shallow water less, but must ensure the supply of water, maintain soil moisture content of about 60%, in the leaf growth period, the need for more water, the need for timely and adequate watering, the late appropriate water control, preventing the leaves from growing, so as not to affect the growth of fleshy roots.

(3) pest control

Red radish pest control should be prevention-oriented, clean field, deep plowing soil, reduce the source of overwintering pests. Diseases of red radish are mainly black rot, bacterial black spot disease, soft fable disease, virus disease, black root disease, downy mildew and so on. Black rot, soft rot, bacterial black spot disease selection of 72% agricultural streptomycin 3,000 times liquid or 25% leaf blight 500 times liquid spray prevention and control; virus disease can be used 20% virus a wettable powder 300 ~ 350 times liquid spray prevention and control; downy mildew, black root disease can be used 25% mefenamic acid wettable powder 1,000 times liquid or 58% mefenamic acid manganese-zinc 5,000 times wettable liquid spray prevention and control. Pests are mainly aphids, cabbage greenfly, snails and so on. Aphids can be sprayed with imidacloprid 2000 times or 50% antiphlogistic powder 1500-2000 times; cabbage greenfly can be sprayed with 20% Avi? Chlorobenzuron wettable powder 2000 to 2500 times liquid control, but also through the light trapping, sugar and vinegar liquid trapping adult insects; snails can be used 6% Mida (tetrameric acetaldehyde) granules mu with 250 to 350 grams of strip or hole in the inter-root soil surface.

4. Harvesting, storage and transportation

When the red radish leaves turn pale, the underground stems should be harvested in time after the full expansion. Generally, the first season of radish planted about 80 to 90 days after the start of harvest; the second season of radish in 110 to 120 days around the harvest. The use of any chemical pesticides is strictly prohibited for 20 days before harvesting to ensure product quality and safety, so that consumers can rest assured. After harvesting the radish selected substandard radish, will meet the standards of radish cleaning and removal of radish leaves to stay radish cherry 2 ~ 3 centimeters in time for shipment and sale.