One of the advantages of corn seedling transplanting technology is that it can be timely transplanted to solve the problem of tight seasons caused by the contradiction between the two seasons; second, seedlings can be planted to improve the quality of the seedlings; the third can ensure the number of acres and reach the full seedlings; four can do To dense planting, improve light and use; 5 can save 30% to 50% of seeds.
There are as many as 13 methods for transplanting corn in the province. Here are two commonly used methods for raising seedlings:
1. Nutrition bag nursery
(1) Bags are available in paper bags, special factory-made plastic bags are also available, specifications about 9 cm high, garden diameter of about 5 cm, seamless without bottom. Reserve 5000 per mu.
(2) Preparation of nutritious soil and bagging 50 kg of fine soil (preferably fertile soil) to mix 50 kg fine feces (tidal manure should be dried and shredded, without thick crop draft stalks, in order to facilitate mixing and bagging). Plus 5 kg of urea and 5 kg of normal calcium, mix evenly. It is best to choose the nursery site in a place convenient to the water source and bag the prepared nutrient soil for sowing.
(3) sowing
Choose high-quality, high-yield, moderate ripening, suitable for close-growing hybrid seeds, timely sowing seedlings. The nursery period is determined according to the time of entering the rainy season and the harvest period of the previous spring harvest. In cold and mountainous areas, corn grows longer and can be nursed from late March to early April. Most of the central and northern regions and irrigated areas can be nursed from late April to early May. Seedling rearing (end of summer season). Most of the southern regions do not require strict corn seeding time, which can be determined according to the rain conditions. When sowing, one for each bag. Without soaking dry seeds after sowing, it is necessary to immediately watering, in order to facilitate the timely emergence of seedlings, at the same time pay attention to the degree of wet soil nutrition bags, timely replenishment of moisture, keep moist, when the seedlings grow to 3 to 4 leaves, timely transplanting .
In order to prevent the seedlings from being too long, the roots are deeply ploughed into the soil, and when the transplanting is easy, the young roots will be pulled off, which will affect the survival rate of transplanting, or the seedling bags will be rotted. When the seedlings are raised, the bottom of the plastic film can be used, and the seedling bags can be placed one by one on the film. Closer to home, in order to increase the temperature of the nutritional bag and maintain the humidity in the cold mountainous areas, it is better to cover the top of the nutrition bag with a layer of plastic film (cover film at night and remove film during the day).
(4) The seedlings shall not be limited by the sowing season. If they can grasp the pre harvest time, they can nurse and transplant at any time. For water-irrigated areas, it is very important to wait for the rain to transplant and plant seedlings. At present, there are two kinds of seedlings used in our province.
The first is to control the emergence of water after seedling emergence, long-term clear and not rain, in the nursery on the ground short-term without water or water, prevent high temperature and humidity, seedlings grow.
The second is the use of chemical control agent that when the seedlings have 2 to 3 leaves, spraying "pacliazole" once, the effect of seedlings can be maintained for about 20 days.
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