Four solutions to the low watermelon rate
1. Emphasis on land selection and basal fertilizer application
1.1 Watermelon Growth Habits: Warm, light, dry air and moderate rain conditions, so the watermelon should be planted in a warm climate, good sunlight, long sunshine, moderate rainfall, low air humidity, low groundwater level, and good irrigation conditions. The soil is rich in organic matter, with a large temperature difference between day and night, and the soil is sandy or loamy.
1.2 When planting, use 5-6 years of rotation, for example, with rice rotation, you can overcome continuous cropping obstacles, ensure that you sit more and more melons and sit firmly.
1.3 When fertilizing watermelon, the use of base fertilizers to decompose farmyard manure can greatly increase the rate of sat collection, yield and sugar content.
1.4 before the watermelon ploughing and soil preparation, the medium fertility land applies 2500-3000kg of cow manure per 667m2, cake fertilizer 100kg, calcium magnesium phosphate fertilizer 40-50kg, borax 1.5-2kg.
1.5 After turning 1-2 times, turn it into a suitable file or ridge.
2. Proper planting and regulation of plant growth
1.1 Watermelon Cultivation Density: Determined flexibly according to soil strength, fertilization type and amount, watermelon varieties, cultivation methods and cultivation time
1.2 Stands for cultivating vines: 1300-1200 strains per 667m2 for early maturing varieties and 1000-1200 for 667m2 medium-late maturing varieties
1.3 Cultivated cultivation in open field: 800-900 strains per 667m2 of early maturing varieties and 600-700 strains per 667m2 of medium-late maturing varieties.
1.4 vine trimming: According to the growth of watermelon plants, female vines sprouting before and after the stem section to split off, can effectively improve the rate of sitting.
3. Artificial pollination
1.1 artificial pollination, can greatly improve the pollination rate and sit rate, improve the rate of sitting 20-30%.
1.2 Male flowers of watermelon must be managed to complete artificial pollination after opening, which can effectively increase pollination rate.
1.3 The best time for artificial pollination: 8-11 am
1.4 A male flower can pollinate 3-5 female flowers.
4. Pharmaceutical treatment
1.1 Watermelon bud stage, female flower after flowering and juvenile melon fist size
Each spray 25kg 0.3% potassium dihydrogen phosphate solution per acre, improve the rate of sitting, yield and sugar, and enhance the ability to resist pests and drought.
1.2 young walnut size
80% Naphthyl Acetate Soluble Powder 1g, dissolved with 50g of alcohol, watered 24kg with a clean brush and painted young larvae.
1.3 watermelon out of cotyledons and 2-leaf stage
Brewing vinegar 1kg + water 25kg, spraying 25kg per acre, sitting rate and yield can be increased by 15-20% and 30-35%, respectively.
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