High-yielding Cultivation Technique of Multi-film Covering Watermelon
First, the multi-layered cover adopts the outer buckle shed, the small shed is buckled in the shed (watermelon is planted in a single row and each row buckles a small arch shed), and the watermelon is covered by the cover mulch in a small arch shed. When the temperature is low, grass canopies can be placed on small sheds and, if necessary, grass canopies can be added outside the shed to increase the insulation effect.
Second, the fine soil preparation before the site preparation, according to 40 cm wide, deep 40 cm digging planting ditch, the basal fertilizer applied to the ditch. Apply 5000 ton of soil miscellaneous fertilizer per acre, 50 kg of diammonium phosphate, 25 kg of urea, and 30 kg of potassium sulfate, then blend evenly with the soil and invert the ridge.
Third, the use of good varieties should be selected to grow strong, easy to set fruit, good uniformity, high yield and disease resistance of the medium-early-maturing varieties, such as Shuangjing Jingxin, Zheng Kang 6, No. 1 harvest and so on.
Fourth, grafting seedlings generally from late January to early February sowing seedlings in greenhouses, using pumpkins as rootstocks for grafting, grafting by using the connection method. Watermelon is planted 5 to 7 days earlier than the pumpkin, and the grafting can be performed when the pumpkin cotyledon is flattened and the first true leaf of watermelon is displayed. After 3 days of grafting, shading was used to preserve moisture, and after 3 days, the light was properly seen and the grass was gradually withdrawn. After 7 days, it could survive. After the survival, the air was released gradually. After 13 days, the roots of the watermelons were cut off. After the new leaves were grown, the grafting clips were removed and the plants were planted after 45 days.
Fifth, to reduce the density In order to increase the weight of watermelon, improve the commercial quality of watermelon, the plant density should be appropriately reduced, generally about 600 plants per acre, spacing 1.8 meters, spacing 0.6 meters.
Sixth, the scientific management of pouring water when planting, generally do not water after planting, 15 days after pouring a small water. When the watermelon fist chase a large fertilizer, apply 30 yuan compound fertilizer per acre, can be applied at 30 cm from the watermelon root. In mid-April, the small arch shelter was demolished. In late April, watermelons began to be marketed, and the first crop was harvested in early May. At this time, the greenhouse can be removed and the second melon can be left after the pruning of the watermelon. Pruning method: removal of lateral branches, the main vine only to stay 50 cm, and then apply 30 yuan compound fertilizer per acre, watered after fertilization. In about 15 days, the watermelon can grow new branches and sit on the second melon. When watermelon fists are large, topdressing 10 kg of urea per acre. In addition, it is also possible to leave a second melon in place after sitting on the first melon for 20 days.
Seven, prevention and treatment of pests using grafted cultivation, can prevent the occurrence of wilt disease. For other diseases, pesticides such as chlorothalonil, mancozeb, thiophanate and others can be used alternately. After colonization, spraying once every 7 to 10 days, combined spraying can be used for extra-root fertilizer.
Eight, timely harvest watermelon sit, can be used to mark the method of cutting branches, the first batch of melons inserted one branch, the second batch of melon inserted two branches, the third batch of melon inserted three branches. When the watermelon reaches the ripening days, the sample is opened for inspection. If it meets the harvesting standards, it can be harvested and marketed in batches.
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