Summer Vegetable Seedling Technology
October 22 00:01:31, 2018
Summer vegetables include broccoli, broccoli, cabbage, celery, Chinese cabbage, and cabbage lettuce, as well as autumn greenhouses and greenhouse-grown tomatoes. During the summer high temperature period, the vegetables live in poor growth and are also susceptible to pests and diseases. To grow seedlings and culture, we must do a good job: 1. Choose a good plot. After selecting the plots, adequately decomposed farmyard manure should be added as base fertilizer and shallow plowing should be carried out. The nursery should be high and dry, with good soil permeability and water retention, and capable of irrigation and drainage. Avoid growing seedlings on plots that have been planted with the same vegetable crops in the continuous cropping plot or on the ground to avoid the harm from soil-borne diseases and to avoid the use of land plots for serious soil pests. 2. High temperature hazards. When lettuce and celery sprout at a high temperature, it is difficult to soak the seed for 8 hours and then use a wet gauze to wrap it in a well or in a cool place. Or cold treatment, celery is 2-5 °C 48 hours, lettuce is 5 °C 72 hours, can promote germination, increase germination rate. It is also possible to sprinkle some cropped straws or straw on the seedbed; or cover the seedbed with cold gauze or shade nets, or shade shelters, cover old membranes, non-woven fabrics, bamboo curtains, drapes, etc.; or Seedlings under high crops. Third, anti-virus disease hazards. Severe vegetables and virus diseases occur at high temperatures. Various measures should be taken: In addition to the above-mentioned nursery facilities, mustard and tomato seeds can be treated with 10% trisodium phosphate solution for 10 minutes and then rinsed with clean water; or vaccinated with tomatoes; Select anti-virus varieties; use nylon net yarn to prevent warts; use silver-gray film to avoid warts; timely prevent warts and so on. Fourth, anti-rainstorm hazards. Heavy rains in the summer cause the soil to bind, which is not conducive to seed germination and unearthing. The following measures should be taken: choose a high dry land to build a seedbed; be vulnerable to rainstorm areas should choose sandy loam seedlings; smooth drainage around the seedbed, use temporary cover to reduce heavy rain hazards; after sowing, in the event of heavy rain, seeds not found, after the rain in the seedbed Shallow cultivator to prevent soil knots. V. Drought hazards. The following measures shall be taken: seeding in seedbeds after seeding with groundwater, or fully irrigating and then soil preparation, sowing and sowing; sowing after covering with soil; mulching (removal immediately after emergence); watering the seedbed in the morning or evening; Seed sowing, that is, open seedlings on-demand seedlings, the first hole after sowing do not cover the soil, when digging the second hole, the wet soil excavated from the first hole as the cover. Sixth. High temperature season nursery, vulnerable to prostitution, to take the following measures to prevent: morning and evening with a watering can, timely seedlings or seedlings; seedlings should be larger nutritional area; cucumber, tomatoes can be sprayed with ethephon to control seedlings leggy. Tomato in the 5 leaf, 7 leaf stage with 40% to 50% chlorcholine 1000 times each spray once, can make the seedling thick, thick green leaves, leaves thickening, and promote flower bud differentiation.