First, choose the variety. The watermelons cultivated in autumn have a short growth period, high temperature and high humidity in the early stage, small temperature difference between day and night, frequent low temperature and rainy weather in the later period, and varied weather conditions. The requirements for varieties are strict. High quality, high yield and high temperature and high humidity, female flowers should be used for cultivation. Early-maturing or mid-maturing varieties with good differentiation, easy to sit melon, tough skin, storage and disease resistance. Early-maturing varieties can be selected from Jingzheng Kang 6, No. Seed Treasure, Zheng Kang No. 7, Sumi No. 1 and small fruit gift watermelon, etc. The mid-maturing variety is harvested on the 2nd, Shaoxing Guanlong, Dilong, Xinxi Nong 8 is suitable.
Second, the form of cultivation. The watermelon cultivated after the autumn extension should not only take into account the problem of drainage in the early stage, but also consider the timely watering in the drought. In addition to paying attention to the selection of plots with high dryness, fertile soil and convenient drainage, it is also necessary to use ridges or open. Ditch cultivation. The main forms of cultivation are as follows. 1 single row cultivation. It should be cultivated with small high ridges, generally 15 to 20 cm in height and 50 cm in width at the bottom of the ridge. The plant and row spacing can be 0.5 m × 1.5 m or 0.4 m × 1.7 m. 2 double row cultivation. Small sorghum should be used, the height is 15-20 cm, the upper width is 50 cm, and the lower width is 60-80 cm. The average plant spacing is 0.5 m × 3 m or 0.4 m × 3.5 m. The two rows of watermelons climb in opposite directions.
Third, soil disinfection. Soil disinfection is usually treated before sowing or planting, or combined with soil tillage. The commonly used medicament for preventing watermelon wilt soil disinfection is 50% Fumei double wettable powder, about 1 kilogram per 667 square meters for guaada application; 50% carbendazim wettable powder 400-600 times liquid or 70% methyl thiophanate Wettable powder 600 times liquid, irrigation or spraying planting soil, can also be formulated into a medicinal soil according to the ratio of medicine and soil of 1:100. The dosage of 667 square meters is 1~1.5 kg, and it is applied into the colonization hole or around the seeding point.
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