High-yield Cultivation Techniques of Over-summer Watermelon

First, the selection of species with strong resistance to disease, high temperature and high humidity varieties, such as high-yielding glutinous rice No. 1, No. 2, Jinlv Jialong and so on.
Second, the selection of land, soil preparation, fertilization to select soil permeability, water permeability, high organic matter content, available n, p, k and trace element content is relatively high, not suitable for fluvo-aquic soil is appropriate. After the wheat harvest, each mu of fully decomposed organic fertilizer 3000-4000 kilograms, potassium dihydrogen phosphate 15 kilograms, about 1 kilogram of boron fertilizer, plowing in the middle and late June till the flat land, the whole high-riding to be broadcast.
3. Covering the mulch film and sowing seeds before sowing. Watermelon seeds are pre-germinated. After dew-whitening, seeds are sowed directly. Seeds are planted at a depth of 60 cm in one hole and 2 per hole. To prevent pests and diseases, 65% of SONSEN Zinc can be used for 1 kg. Carbendazim 0.5 kilograms mixed with fine sandy soil, point by point and evenly, pay attention to be separated from the seed by a certain distance, then cover the soil, after the seeding, it is best to cover the bow shed in time with the film to prevent the rain from cooling, and pay attention to the small bow when covering. The shed should not be blocked at both ends to facilitate ventilation and cooling.
Fourth, the management of summer watermelon growth period
1. When the seedling grows more than one meter long in this period, it is necessary to promptly withdraw the shed, pay attention to refining the seedlings in the previous 3-5 days, and at the beginning, pay attention to uncovering the film sooner or later. After the withdrawal, the film is laid flat on the side of the melon and pressed with soil.
2, weeding watermelon over the summer prone to grass damage, manual weeding should be timely. Chemical weeding can be sprayed in the weed 2-4 leaf stage mu spray 12.5% ​​efficient cover straw 30-40 ml or 5% fine grass grave 60-80 ml water 60 kg spray.
3, pruning and snoring after the withdrawal of the shed in a timely manner, using two vines or three vines to stay in the melon, until after the basic sitting melon to grow a robust, melon type, egg size melon, and the remaining poor melons removed.
4, after the appointment of melon management and timely fertilizer, generally mu 25-30 kilograms of urea, focusing on doing a good job downy mildew and anthrax prevention and treatment. For the control of downy mildew per acre with 100 grams of chlorothalonil to spray 60-80 kg of water, to prevent anthrax from being sprayed with chlorothalonil or chlorothalonil 100-125 g for 60-80 kg of water; for beet armyworm, 4.5 % Cypermethrin EC 50-100 ml plus 40% phoxim EC 100 ml sprays 40 kg water better.
V. Harvesting Firstly, the collection period is calculated based on the time of sitting. It usually takes about 40 days from flowering to maturity. The second is to see and hear. The mature skin of watermelon is bright, and the color of the pattern is deepened, and the width of the groove is widened. The ear can be heard by gently tapping the rind and distinguishing raw and cooked according to the sound of its response. In addition, attention should be paid to pest control during harvest of watermelon.

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