Rational water management can capture the key points of pipe water after transplanting of high-yielding rice.

After rice transplanting, scientific and reasonable water management is a technical measure to obtain high and stable yield of rice.

Rice

1. An inch of water turns green: when the rice seedlings are transplanted, the roots are injured and the water absorption is weak, but the transpiration of the leaves is not reduced, which is easy to cause the rice to wither due to the loss of water, so it is best to maintain a water layer of about 1 inch in the field to promote the occurrence of new roots and quickly return to green and live trees.

2. Thin water tillering. In the tillering stage, shallow water irrigation, the general paddy field can maintain 0.5-1 inch water layer, too deep, inhibit tillering and delay tillering time, and cause high tillering; water layer is too shallow, resulting in excessive tillering, consumption of rice nutrients, the formation of a large number of ineffective tillers.

3. Control the seedlings by drying the field. When the tiller of rice reaches a certain amount, it is necessary to drain the water and sun the field appropriately. The effect of sun-drying on the inhibition and then promotion of soil available oxygen can control the excessive development of the population, promote the transfer of rice growth center from vegetative growth to reproductive growth, and cultivate large panicles. Generally master sticky heavy field, low-lying field heavy sun; sandy field, high field light sun; fertile field heavy sun, thin field light sun; seedling too strong heavy sun, seedling weak light sun. Generally bask in the field to open a small crack, the foot is not sunken, the leaf color fades, the leaf is upright.

4. Full water booting. Rice needs sufficient water at the booting stage. At this stage, the paddy field should maintain a 1-2 inch water layer to ensure a large panicle and many grains. Because at this time, the plant growth is exuberant, the photosynthesis is strong, and the foliar transpiration is the largest, which is the period when the physiological water demand of rice is the most, accounting for about 40% of the whole growth period.

5. Heading in shallow water. During the heading period, the water layer of the rice field should be 0.5-1 inch. If there is no water and drought in the field at this time, the pollen and stigma are easy to dry up, can not be pollinated, or heading unevenly, or even can not produce panicles.

6. Wet grouting. Intermittent irrigation should be carried out during the filling period to ensure the moist state of the rice field, so as to promote the transport of organic matter from the rice plant to the grain, reduce the empty shell blighted grain and increase the 1000-grain weight. Because in the later stage of rice growth, the condition of transporting oxygen from leaves to roots becomes worse, if the soil water is lack of oxygen, the roots are easy to senescence prematurely; moist irrigation is adopted to carry out the water management of "dry, dry and wet, mainly wet". It is beneficial to increase air to protect roots, roots to support leaves, and leaves to strengthen seeds.