As usual, the weather is getting hotter and hotter. Summer is here. The main vegetables for growing seedlings in summer are broccoli, broccoli, kale, celery, Chinese cabbage, head lettuce and tomatoes grown in autumn greenhouses and greenhouses. During the high temperature period in summer, direct seeding of vegetables grows poorly and is also susceptible to diseases and insect pests. To stop seedling cultivation, the following tasks must be done. Below, our Vegetable Planter manufacturer introduces the considerations for summer vegetable seedlings:

　　 1. Choose a good plot

　　 After selecting the plots, add adequately decomposed farmyard manure as base fertilizer and shallow tillage. The nursery ground should be high dry and flat, with good soil permeability and water retention, and can be irrigated and drained. Avoid growing seedlings in rotation fields or on plots where the same vegetables have been planted in the previous crop to avoid soil-borne disease damage, and avoid growing seedlings in open plots with severe pests.

　　2, prevent high temperature hazards

　　When the temperature is high, lettuce and celery germinate hard. You can soak the seeds for 8 hours and wrap them with wet gauze and place them in the well, or cool the center to accelerate the germination. When using low temperature treatment, celery is 2℃-5℃ for 48 hours, lettuce is 5℃ for 72 hours, which can promote germination and increase the germination rate. You can also sprinkle some truncated wheat stalks or straw on the seedbed; or cover the seedbed with sunshade nets, or set up a awning with old film, non-woven fabrics, bamboo curtains, reed curtains, etc.; or under tall crops Nursery.

　　3, anti-virus disease hazards

　　Vegetable virus disease is severe under high temperature, and various measures should be taken. In addition to the above-mentioned seedling raising measures, 10% trisodium phosphate solution can be used to treat mustard and tomato seeds for 10 minutes, and then rinse with water to clean; or use attenuated vaccine to inoculate tomatoes; choose anti-virus species; use nylon mesh to prevent aphids; use silver Gray film to avoid aphids; timely prevention of aphids, etc.

　　4. Anti-storm hazards

　　 Heavy rains in summer make the soil compact, which is not conducive to the germination of seeds. The following measures should be taken: choose high dry land to build seedlings; in areas prone to heavy rain, choose sandy loam to raise seedlings; drainage around the seedbeds should be smooth, and temporary cover should be used to reduce the harm of heavy rains. After sowing, if the seeds are not unearthed due to heavy rain, plough shallowly on the seedbed after the rain to avoid soil formation.

　　 5. Drought prevention

　　Pour foot water in the seedbed and then sow seeds, or irrigate well and then prepare the ground and sow. Suppress after sowing and covering with soil; cover with mulch and remove the mulch immediately after emergence; in the morning or at night, water the seedbed; sowing by moisture, that is, hole sowing for seedlings. After the first hole is sowed, the soil will not be covered temporarily, and the second hole will be dug out when digging the second hole. The wet soil is used as the covering soil for the first hole.

　　 6. Anti-seedling leggy

　　The use of Planting Machine to raise seedlings in high temperature seasons is very easy to grow. The following measures should be taken to prevent them: use a watering can in the morning and evening to divide or thin the seedlings in time. The nutrient area of ​​the seedlings should be larger. Cucumber and tomato can be sprayed with ethephon to control the growth of seedlings. Spraying the tomato with 40%-50% chlormequat 1000 times solution once in the 5 leaf and 7 leaf stages can make the seedlings thicker, the leaf color is dark green, the leaves are thickened, and the flower bud differentiation is promoted.