A brief talk on how to manage water in cultivated rice?

According to the law of water demand of rice, scientific and reasonable water management at different stages of growth and development is a technical measure to capture high and stable yield of rice. The main points of its water management technology are as follows:

Plant seedlings in shallow water and stand up in wet water. The water for planting seedlings should be shallow, and the seedlings should not float when they are planted. After planting, they should fall into the water properly to keep the field moist, which is conducive to the rapid establishment of seedlings.

An inch of water turns green and thin water tillers. After setting up seedlings, the paddy field should keep the shallow water layer of 0.5 inch to turn green and promote tillering. Too deep water layer will inhibit tillering and delay tillering time, and cause high tillering; too shallow water layer will lead to too many tillers, consume plant nutrients, and form a large number of ineffective tillers.

Enough seedlings to dry the field, control seedlings to set up a frame. When the number of seedlings in the field reaches 80% of the expected number of ears, the field should be properly drained and dried to control ineffective tillering in the later stage. When drying the field, let the water dry for 3-5 days, then put on the new water for 2-3 days, and then let it dry for 2-3 rounds, but the drying of the field must be carried out due to the time of the land, and in places where there is no guarantee of water supply and there is a possibility of summer and summer droughts, the fields should not be dried blindly, otherwise it will result in a shortage of water and drought in the middle and later stages of rice production.

Full water booting, dry and wet strong seeds. Rice needs sufficient water at booting stage, and the paddy field should maintain a 1-2 inch water layer to ensure large panicles and more grains. During the heading period, the water layer of the rice field should be 0.5 inch. If there is no water and drought in the field at this time, not only the heading is uneven, but even the panicle can not be produced. Alternating wet and dry intermittent irrigation should be carried out after the filling stage to promote the transport of organic matter from the plant to the grain, reduce the empty shell blighted grain and increase the 1000-grain weight. After entering the yellow ripening stage, the paddy field should be drained and dry, which is not only conducive to grain fullness, but also conducive to field harvest and improve the cultivated land quality of crops in the next season.