It is difficult to raise seedlings in summer, so don

    In the hot summer, many growers like to sprinkle some green vegetable seeds, which are very convenient to eat and pick. However, many farmers often encounter the problem that the seeds do not sprout or the seedlings turn yellow during the planting process. Often wonder if there is something wrong with your seeds? Most of the time, the seeds are fine, but it has a lot to do with our sowing method.

   Raising seedlings during the high temperature period in summer is very likely to cause leggy seedlings and damage to diseases and insect pests. In concentrated vegetable production areas, the nursery farms are well-equipped with advanced technology, and vegetable farmers mostly choose to buy seedlings from the nursery farms. In areas where vegetable cultivation is relatively scattered, vegetable farmers tend to raise their own seedlings. This time, let's talk about the small points of summer seedling breeding.

    1. High temperature protection

   Shading and cooling can be achieved through internal and external shading nets, water curtains and fans. When the temperature is too high, it can also be cooled by spraying clean water on the greenhouse film. In areas where conditions permit, ice cubes can also be purchased and placed in the greenhouse. Several methods can be used individually or in combination, and the temperature can be reduced by 2-6.

Tomato is a warm-loving vegetable. The suitable temperature for growth during the day is generally about 25 degrees, and at night it is about 16 degrees. Except for the germination, emergence and slow seedling stages, which require higher temperature and humidity, other periods are not required. High humidity.

    2. Prevent heavy rain

    It rains frequently in summer, which can suddenly increase the air humidity. If the drainage is not smooth, it will also flow back into the nursery greenhouse, causing damage to the nursery greenhouse and facilities, which is very unfavorable for the normal development of seedlings. Therefore, in summer, seedlings must make a good drainage plan, check the drainage facilities in advance, and repair the greenhouse film in time.

    3. Drought resistance

    In summer, the temperature is high, the light is strong, the evaporation is large, and the substrate is easy to dry. If watering is not timely or excessive, the substrate will suddenly become dry and wet, which can easily lead to rot of the stem base. The growth of the seedlings should be carefully observed, the dry and wet conditions of the substrate should be checked, and appropriate watering should be carried out in time. Avoid hot midday watering.

    4. Prevent excessive growth

    In the high temperature season, the temperature difference between day and night is small, and the temperature at night is high, which is easy to cause excessive growth of seedlings. In the management of seedlings, ventilation should be increased in time, seedlings should be divided, and chemical control agents should be sprayed in time. This can prevent thinning and long internodes, thinning and weakening of stems and leaves, thickening of seedlings, thickening and greening of leaves, thickening of leaves, and promoting flower bud differentiation.

    5. Pest Control

    Vegetable seedlings are susceptible to viral diseases in high temperature seasons, and the prevention and control of pests and diseases is strengthened to ensure the healthy growth of plants and fruits. , Insect-proof nets should be set up at the top and bottom tuyere to prevent pests from entering the greenhouse from the tuyere. If pests have entered the shed to damage the plants, they should be sprayed in time to kill them. Second, we must pay attention to the prevention and control of leaf mold, and other diseases.

    To sum up, summer seedlings face many unfavorable objective factors. It is necessary to prepare the seedling plan, personnel division, facility maintenance and material preparation in advance, select suitable heat-resistant, high-temperature-resistant and virus-resistant varieties, and successfully complete the high-temperature season seedling cultivation through scientific, ecological and low-cost methods and technical means.