Latest High-Yield Planting Technique Tutorial for Over-Summer Radishes
Radishes are generally planted in autumn and marketed in winter, but in recent years over-summer cultivation has been relatively successful, and since the harvest period falls right in the 8-9 vegetable off-season, the returns are higher and the planting prospects are good. However, the high temperature and frequent rain in summer are unfavorable to radish growth, and the yield is lower than that of autumn cultivation, so how can over-summer radishes achieve high yields? Let's find out together.
1. Choose excellent varieties
Summer is hot and rainy, which is unfavorable to radish growth, so the cultivated variety should preferably be one with good heat tolerance, drought tolerance, strong resistance to pests and diseases, and the ability to form fleshy roots under high-temperature conditions. Relatively good varieties include Re Bai, Xiao Gou Bai, Xia Chang Bai No. 2, Dongfang Huimei, Xia Kang 40 Days, and others.
2. Land preparation and fertilization
Choose flat terrain with deep soil, good drainage and good water retention, preferably sandy loam. After harvesting the previous crop, promptly remove field weeds and leftover plant debris, then apply 4000 kg of fully decomposed barnyard manure, 15 kg of potassium sulfate and 30 kg of superphosphate per mu. Deeply plow and prepare the land, harrow it fine and level it, then carry out ridge cultivation, with a ridge spacing of 80 cm, a ridge height of 15-20 cm, and a plant-to-row spacing of 20×20-25 cm.
3. Sowing
The sowing time for summer-sown radishes can be arranged in batches from June to August according to market demand. Large varieties are best sown in holes, with a hole depth of 1.5-2 cm and 2-3 seeds per hole; after sowing, cover with a 2 cm layer of fine sieved soil. Medium varieties can be sown in holes or in drills; for drill sowing, the furrow depth should be 2-3 cm. Small varieties can be broadcast sown. Generally, large varieties use about 0.5 kg of seed per mu, medium varieties 0.75 kg, and small varieties 1.5-2 kg.
4. Field management
After emergence, thin the seedlings promptly to ensure uniform and strong seedlings. The first thinning is carried out when the cotyledons are fully expanded, and the second thinning when the seedlings have 2-3 true leaves. When the seedlings grow 5 true leaves, they can be planted out. Combine thinning with intertillage and weeding; during intertillage, go shallow first and then deep, so as not to damage the seedling roots. Summer temperatures are high and water evaporates quickly, so water timely and appropriately according to soil moisture and the growth characteristics of the radish. Generally, water three times during the seedling stage, and during the vigorous growth stage, the number and amount of watering should increase as the radish grows. Radish growth cannot do without fertilizer. After final thinning, apply 8-15 kg of urea per mu flushed with water to promote leaf growth; when the fleshy root shows its shoulder, apply 5-10 kg of urea, 10 kg of potassium sulfate and 3-5 kg of superphosphate flushed with water to promote fleshy root expansion; when the fleshy root is expanding, foliar fertilizer can be used to promote fleshy root expansion.
The above is an introduction to high-yield planting techniques for over-summer radishes. We hope it helps you. For more related knowledge, please follow us.