In the Taocheng District of Hebei Province, cotton and watermelon interplanting have been planted for nearly ten years. The cultivation techniques have become more mature and the planting area has increased year by year. Today, the region covers an area of ​​nearly 10,000 acres of melon and cotton, covering all towns and villages, the average yield of 2500 kilograms of watermelon, mu benefits of 1,250 yuan, cotton average yield of 78 kilograms of lint, mu benefits of 1,170 yuan, two mu total benefit of 2,420 yuan, cotton - watermelon Intercropping techniques for cultivation:
1. Variety: In order to shorten the symbiotic period of cotton and watermelon, watermelons use medium-early-maturing varieties, mainly Zhengza 9, Jingxin 1, and Admiralty Guanlong. Cotton varieties with large plant growth, strong growth, not premature aging of high-yield insect-resistant cotton varieties, mainly standard A, double 321,9913 and other varieties.
Second, fertilization: re-application of basic fertilizer, acres of lean end of the application of 4-5 square, 25 kg of ammonium phosphate, 25 kg of ammonium bicarbonate, potash 10 kg. Acres at 15 kg of urea for cotton flowering.
Third, sowing date and sowing form: watermelon sowing date is on April 15th, cotton sowing date is April 25-30. A film of watermelon and cotton is used for two purposes. A film of watermelon is planted on the membrane. The distance between the two films is 70-80cm, and the distance between the rows of watermelons is 150cm. After sowing watermelons, around April 25th, a row of cotton or two rows of cotton was planted on the watermelon membrane. The distance between the watermelon plants was 40 cm and the mu density was 1100. For example, a row of watermelons is interplanted with one row of cotton, the cotton spacing is 20 cm, the row of watermelons is interplanted with two rows of cotton, the cotton spacing is 40 cm, and the cotton density is 2,000.
Fourth, field management: Watermelon sowing, no watering at the seedling stage. When the vine grows 30-40cm in length, it is pressed in time. After the watermelon blossoms, artificial pollination is assisted. Zugua melons after watering. After the second melon grows, remove the first melon. In early June, watermelons began picking melons and pulling them in late June.
Cotton seedling stage, bud stage and watermelon symbiotic, soil moisture, cotton seedlings than normal, cotton field plant development, seedlings, attention to the prevention and treatment of seedlings, timely control after budding, prevent cotton leggy. After the watermelon was pulled in late June, the management of cotton was strengthened, the film was removed from the cultivation and weeding, the rain was applied for raining, the urea was recovered with 15 kg of urea, and it was towed in a timely manner in mid-July to ensure reasonable control. Due to the low density of interplanted cotton fields, it may be appropriate to fight at the top of the plant or not to shoot at the top of the plant, increase the number of bolls per plant, re-pour the cotton fields, and control the yellow and wilt diseases in a timely manner.
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