First, the selection of fine varieties: summer radish cultivated in reverse season should be selected good heat resistance, disease resistance, meat root swelling fast high-quality varieties. Such as: Xia Changbai No. 2, Xia Mei Lian Zaosheng No. 3 and other varieties.
Second, the preparation of fertilization: radish planted plots should use thick, well-drained, sandy loam rich in organic matter. After the harvest of the former crop, the stubble weeds in the field are promptly removed, then 3000-4000 kg of fully-fertilized organic fertilizer and 50 kg of vegetable-specific compound fertilizer are applied per acre as a basal fertilizer, followed by deep plowing, soil preparation, plowing, and pounding. Finally, for ridge, ridge distance 60-80 cm, ridge height 15-20 cm, ridge width 20 cm.
Third, timely sowing: According to market demand from late June to early August are suitable for planting, but not too early to broadcast, or rain, prone to disease. Large-sized radish varieties can be planted in a hole, 0.5 kg for each mu, and each row is double-rowed when sowed, keeping the spacing between 20-25-25 cm, 2-3 seeds per hole, and 2 cm thick after sowing. Fine soil. Medium-sized radish varieties can be drilled and drilled, and the depth of the ditch is required to be 2-3 cm, and the amount per mu is 0.75-1.0 kg. Smaller varieties are used for sowing, and the amount per mu is 1.5-2.0 kg. When sowing, it is necessary to use medicinal soil or chemical seed dressing in order to prevent underground pests. After sowing, pour small water in the furrows and pour water once in 2-3 days. The amount of water should not exceed the ridge height, so it is appropriate to soak the ridge back.
Fourth, strengthen field management
1. Seedlings and Dinglings: When the seedlings are unearthed, the first seedlings are made when the cotyledons are unfolded; 3-4 true leaves are grown and the second seedlings are made; when the seedlings have 5-6 leaves, the fleshy root of radish breaks Start seedlings, leaving only one strong seedling per hole.
2, cultivator, weeding: combined with the first shallow shallow deep ploughing and ploughing, while the soil in the ditch cultivating in the glutinous surface, to prevent down seedlings.
3. Timely irrigation: In summer, the temperature is high and the water evaporates quickly. Therefore, water should be properly watered according to the soil moisture and the characteristics of each growth period of radish. In the seedling stage, the seedling roots are shallow and the water requirement is small. It is necessary to grasp the principle of “less pouring and diluteâ€; in the period of leaf growth, it is necessary to grasp the principle of “appropriate watering†and not be able to water too much; during the period of root enlargement, it is necessary to grasp “ The principle of full and uniform water supply is to keep the soil moisture at 70-80%. Note: Summer radish avoid watering at noon, it is best to water in the evening.
4. Fertilizer application: After combining Dingling with watering, apply 8-12 kg of urea per acre to promote the growth of leaves; In the early stage of fleshy root expansion, that is, after the bare shoulders, the amount of urea or ammonium sulfate 15-20 kg can be applied with water. Potassium sulfate 10-15 kg. In addition, this period, if combined with the top dressing and then spraying fertilizer 2-3 times, will effectively promote the root swelling.
5. Pest Control: Summer temperatures are high and there are more insect pests, mainly including cabbage caterpillars, aphids, diamondback moths, yellow stripe fleas, and other insecticides such as Lethbenzin, imidacloprid, CPT, BT EC, etc.; Diseases such as black rot, soft rot, and virus diseases can be controlled by selecting appropriate fungicides such as agricultural streptomycin, neomycin, virus K, and virus spirit, respectively.
V. Timely harvesting: When the fleshy root is completely expanded and the individual plant weighs 300-500 grams, according to the market conditions, the market can be successively harvested. Attention can not be harvested too late, otherwise easy to worry, affect the quality.
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