High temperature season seedlings

Some vegetables are not only prone to malnutrition during the summer hot season, but they are also susceptible to various diseases and pests. Therefore, nursery cultivation is required. In summer, the main vegetables that need to be transplanted are cauliflower, cabbage, celery, Chinese cabbage, and cabbage lettuce. In addition, tomatoes grown in the greenhouse in the autumn also need to be nursed in the summer.

1. Choose a plot. The plots for raising seedlings should be high-drying, smooth, and have good soil permeability and water retention, and they should be capable of irrigation and drainage, and they should not be used to grow seedlings on the land that had been planted with similar vegetables in Shangyu so as to avoid soil-borne diseases. In addition, it is important to remember not to raise seedlings on the land with severe pests in the ground. After selecting the plots, the farmyard manure, which is fully decomposed, will be used as the base fertilizer, and the crop will be ploughed after fertilization.

2. Germination. The lettuce and celery seeds are difficult to germinate, and germination should be performed before sowing to increase the germination rate. The celery seeds should be soaked in water for 8 hours, then wrapped in wet gauze and kept at a low temperature of 2°C-5°C for 48 hours; the treatment of lettuce seeds can be kept at a low temperature of 5°C. 72 hours. To prevent high temperature hazards, sprinkle some wheat straw on the seedbed during nursery or cover the seedbed with a shade net.

3. Prevention of viral diseases. Vegetable virus diseases often occur at high temperatures, and various measures should be taken to prevent them. Aphids are the major mediators of viral diseases, and special attention should be paid to the control of aphids in the nursery process. In the cultivation, we should try our best to choose the varieties of antiviral disease. The seeds should be soaked with 10% trisodium phosphate solution before sowing.

4. Prevent heavy rain hazards. In summer, the temperature is high and rainfall is high. When growing seedlings, it is necessary to choose Gaozao to build seedbeds. In regions with more rainstorms, it is better to choose seedlings in sandy soil land, and the drainage around the seedbeds should be smooth. After sowing, in case of heavy rain, the sprouts will be difficult to unearth. After the rain, the seedlings should be ploughed in time to prevent surface compaction.

5. Prevent soil drought. After the seedbed is established, it should be poured with enough water and then sowed, or it can be fully irrigated and then set up the bed before the planting. After sowing, cover the soil and suppress and cover the film. Note that the mulch should be removed immediately after emergence. In addition, the seedbed should be sprayed every morning or evening.

6. Prevent seedlings from being leggy. When young seedlings are cultivated in the summer, the seedlings are extremely prone to growth due to high temperatures, so preventive measures must be taken. Can be used every morning and evening with a watering can watering, seedlings grow up in time after the seedlings or seedlings to expand its nutritional area. For cucumber and tomato seedlings, ethephon can be sprayed in time when it is found to be long. Tomato seedlings can be sprayed once every 40% of chlormequat in 1,000-fold liquid in the 5th leaf and 7th leaf stage to promote seedling stem sturdiness and promote flower bud differentiation.

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