In the hot summer season, the main growing vegetables include broccoli, Chinese cabbage, late-to-late cultivated tomatoes, eggplant, bell pepper, and late cabbage, celery, mustard, and lettuce.
In summer, it is hot and rainy. In some years, severe drought will occur and the disease will be severe. This is a major obstacle to nurturing strong seedlings. In the nursery, the following measures should be taken to overcome them to ensure the normal growth of the seedlings and the quality of the seedlings.
Prevent high temperature hazards. High temperature is not conducive to the growth of some vegetable seedlings. To prevent heat hazards, the following measures can be adopted: sprinkle some short corn stalks and wheat straw on the seedbeds; use shade nets to cover the seedbeds, but also use bamboo blinds, reed curtains, etc., to form shading sheds; Seedlings are planted under high-vegetable vegetables, and well-ventilated plots are used as seedbeds. Through the above shading methods, the temperature can be lowered and the light transmittance can be reduced, which is conducive to emergence and growth of vegetable seedlings.
Prevent heavy rain hazards. On the one hand, the heavy rain in summer causes the soil to bind, which is not conducive to seed germination and unearthed. On the other hand, it is easy to cause locust plagues. The following measures can be taken: Select a highland to build a seedbed. The seedbed should be drained smoothly around the seedlings and drained in a timely manner in case of rainstorm; use temporary cover to reduce the impact of heavy rain; in case of heavy rain after sowing and the seeds are not germinating, after the rain should be shallow in the seedbed to prevent the soil panel knot and so on.
Prevent hot and drought. In some years or regions, drought occurs during summer nursery. Take the following measures to prevent its damage: soak in enough water in the seedbed, sow, or fully irrigated, and then prepare the soil and sow; after sowing the soil, take measures to suppress the soil surface. In the morning or evening, the “floating water†(water is almost finished) to the seedbed; sowing seeds, sowing seeds, on-demand, sowing the first hole after sowing, and digging the second hole, the wet soil will be excavated from it. As the first hole, etc.
Prevent virus disease hazards. Some vegetable virus diseases are very serious under high temperature conditions. The following measures can be taken to reduce the seedbed temperature to prevent the occurrence of virus disease: soak it in clean water for 4 hours, remove and then soak in 10% trisodium phosphate solution, then rinse with clean water. Anti-tomato seedlings, such as tomatoes in the 5 leaf, 7 leaf stage with 40% to 50% of Chlormequat 1000 times each spray, can make seedlings thick, thick green leaves, leaves thickening, and promote flower bud differentiation.
Prevent seedlings from being leggy. During the high temperature season, some vegetable seedlings are easy to grow, such as tomatoes, cucumbers, etc., and can be prevented by the following measures: the watering amount should not be too large, and watering with a watering can in the evening or in the morning should avoid flood irrigation; expand the nutritional area of ​​the seedlings. Or timely seedlings or seedlings.
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