What are the key technical points for growing and managing summer radishes?
How do you manage summer radish cultivation well? Please introduce the management methods. To grow summer radishes, you can refer to the following methods for management: 1. Thinning and final thinning: After the seedlings emerge, carry out the first thinning when the cotyledons unfold; carry out the second thinning after 3-4 true leaves grow; when the seedlings have 5-6 leaves and the radish's fleshy...
How do you manage summer radish cultivation well? Please introduce the management methods.
To grow summer radishes, you can refer to the following methods for management:
1. Thinning and final thinning: After the seedlings emerge, carry out the first thinning when the cotyledons unfold; carry out the second thinning after 3-4 true leaves grow; when the seedlings have 5-6 leaves and the radish's fleshy root begins to split, start final thinning, keeping only one healthy seedling per hole.
2. Cultivation and weeding: Along with thinning, carry out shallow then deep hoeing and cultivation, and at the same time bank the soil from the furrow onto the bed surface to prevent the seedlings from falling over.
3. Timely irrigation: Summer temperatures are high and water evaporates quickly, so watering should be reasonable according to soil moisture and the characteristics of each growth stage of the radish. In the seedling stage, the roots are shallow and water demand is small, so follow the principle of "water less but often"; during the peak leaf growth stage, follow the principle of "moderate irrigation" and do not water too much; during the fleshy root enlargement stage, follow the principle of "sufficient and even water supply" and keep soil moisture at 70%-80%. Note: Summer radishes should not be watered at noon; watering in the evening is best.
4. Fertilizer application: After final thinning, apply 8-12 kg of urea per mu along with watering to promote leaf growth; in the early stage of fleshy root enlargement, that is, after the shoulders are exposed, apply 15-20 kg of urea or ammonium sulfate and 10-15 kg of potassium sulfate per mu with water. In addition, if foliar spraying is carried out 2-3 times in combination with root topdressing during this period, it will effectively promote fleshy root enlargement.
5. Pest and disease control: Summer temperatures are high and there are many insect pests, mainly cabbage caterpillars, aphids, diamondback moths, striped flea beetles, etc. Insecticides such as chlorpyrifos, imidacloprid, chlorfluazuron, and BT emulsifiable concentrate can be selected for control; for diseases such as black rot, soft rot, and viral disease, corresponding fungicides such as Xinzhiromycin, Virus K, and Virus Ling can be selected for control.
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