Nursery and seedbed management. The cucumber must use grafted seedlings, and the rootstock is generally black seed pumpkin. 1. Seedbed preparation. The cucumber and black seed pumpkin seedbeds are set in the greenhouse, and the bed soil can be added with about 30% of the decomposed organic fertilizer and sieved for use. The size of the seedbed is generally 2.5-3 square meters. 2, soaking seeds and germination. Before sowing, the seeds should be immersed in hot water at 55-60 ° C, and continuously stirred. When the water temperature drops 25-30 ° C, soak for 4-6 hours, the black seed pumpkin should be longer. After the seeds have absorbed enough water, they are then removed and placed at 25 ° C to 30 ° C for germination. 3. Seeding and seedbed management. Cucumber sowing should be chosen on a sunny morning. The sowing time of cucumber is about 4 days earlier than the pumpkin. At this time, the temperature is high and the emergence is quick and tidy. It should be uniform when planting, and the bottom water should be poured before sowing. Covering soil should not be too thick or too thin. The thickness of the cover soil of cucumber is controlled at 1-1.5 cm, and the black seed pumpkin is controlled at about 2-2.5 cm. Immediately after sowing, the seedbed is covered with a plastic film to increase the temperature and moisture, and create a good temperature and humidity condition for seed germination. After sowing, ensure a higher temperature, generally controlled between 25 ° C and 30 ° C. The temperature after emergence can be appropriately reduced to prevent the seedlings from being too long. After the seedlings were unearthed, spray 50% thiophanate-methyl WP 500 times and 50% carbendazim WP 500 times at intervals of 4-5 days before grafting. Management of grafted and grafted seedlings. At present, the method of application in production is more reliable, and the grafting survival rate is high, and the masses are easy to grasp. Prepare enough nutritious soil before grafting. When the first true leaf of the rootstock is half-expanded, the cucumber seedlings are ready for grafting when they are fresh. 1-2 days after grafting is the period of callus formation, which is a critical period for survival. Be sure to ensure that the humidity in the small arch shed is over 95%, and the first two days should be fully shaded. On the third day, you can see the weak light properly in the morning and evening. After 4-10 days, the light will gradually strengthen, and it will only be properly shaded at noon. At the same time, the ventilation time is gradually increased from 1 hour, and 7-10 days can be ventilated all day. After 10-15 days, the hypocotyl of cucumber is cut off. After cutting, it is necessary to flexibly grasp the changes of seedling condition, adjust the light and temperature, and improve the survival rate. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Covid-19 Rapid Test,Sars-Cov-2 Rapid Test,Sars-Cov-2 Igg Antibody Test,Sars-Cov-2 Igg Igm Antibody Test Wuxi BioHermes Bio & Medical Technology Co., Ltd. , https://www.biohermesglobal.com