How to manage seedlings?

(1) Uncover the membrane in time. After sowing, the weather trend should be exposed in time, and the film should be uncovered and managed in time. Before budding, the temperature in the membrane does not exceed 35℃, and after budding, the temperature in the membrane is 25 ~ 30℃. Uncover the film to cool down on sunny days to prevent seedlings from burning.

The uncovering time should be arranged in sunny afternoon or cloudy morning, before rainy day. After uncovering the film, dry seedlings should be watered in time to make up for the lack of soil moisture. In case of high temperature, the seedbed should be covered with a thin layer of straw or wheat bran to reduce the evaporation of water on the soil surface.

Pay attention to ventilation and hardening seedlings after emergence to prevent seedlings from burning. Pay attention to watering during drought to prevent rice seedlings from returning to salt and affecting the growth of rice seedlings. Top dressing according to the situation of seedlings to ensure Miao Zhuang. When the seedlings are 3 leaves 1 heart, they can be transplanted in about 30 days.

(2) Fertilizer and water management. The water management of dry seedlings adopts the form of "controlling drought after wetting" The day before sowing, water thoroughly, cover the seed soil with plastic film after sowing, and spray it once in time after uncovering the plastic film. From the fourth leaf stage of seedlings to before transplanting, insist on not rolling leaves and watering at noon, and keep the ditch system clear at the same time to ensure that there is no water in the seedling field in rainy days, so as to prevent water from damaging dry seedlings and losing the advantage of dry breeding. For example, roll leaves at noon and replenish water once at night to make the soil moist.

Wet seedlings are irrigated in the heart stage of seedling 1 leaf 1, and water layer irrigation is established after the second leaf stage of seedling. Before the heart stage of 1 leaf and 1 leaf, double-film seedlings should be irrigated with flat border water to keep the border surface moist and not white (convenient for seedling loading). During the 2-3 leaf stage, the racehorse water should be irrigated according to the weather conditions, so that the front water is not connected with the back water, and the water layer irrigation will not cause root rot. 4 ~ 5 days before transplanting, you should pour half a cup of water and squat in the ground to harden the seedlings.

After the seedlings grow to 1 leaf and 1 heart, water is poured into the border, and the film is uncovered and ventilated to harden the seedlings, so that the seedlings can gradually adapt to the external environment. After 3 ~ 4 days, take them all out and keep the surface of the carriage wet with thin water. In case of strong cold current, immediately cover the film to prevent freezing, and spray Tianda 2 1 16 Zhuangmiaoling for prevention.

2 ~ 3 leaves of seedlings need topdressing with weaning fertilizer. Urea (2 ~ 3kg per mu)+farmyard manure can be sprayed, or Zhuangmiaoling 600 ~ 1 16 times, every 7 ~ 1000 days 1 time, 2 ~ 3 times in a row.