Reasonable irrigation is an important measure to seize the high yield of rice. The principle of reasonable irrigation of rice is: deep water returns green, shallow moisture, strong water, dry and wet and strong seeds. 1. Deep water returns green. After transplanting rice, the root system suffers a lot of damage, and the ability to attract moisture is greatly weakened. At this time, if the field is short of water, it will cause the ability of the rice root to absorb water to be greatly weakened. At this time, if the field is short of water, rice roots will be absorbed. The moisture content is low, and the loss of moisture in the leaves leads to insufficient income. From the light to the prolonged green period, the weight of the dead leaves is heavy. Therefore, the seedlings must be returned to deep water after transplanting to prevent physiological loss of water so as to return green earlier and reduce dead seedlings. However, it is not as good as deep water to return to green. Normally, it can be 3-4 centimeters. 2. Shallow moisture. If the irrigation period is too deep during the tillering period, the soil is anoxic and the nutrient is decomposed slowly, and the light at the base of the rice plant is weak, which is unfavorable to the tiller. However, there should be no water layer during the delivery period. Generally, shallow water layers with a depth of 1.5 cm should be filled, and “the water should not be seen before,†in order to coordinate the contradiction between water, fertilizer, and gas in the soil. 3. There is strong water. During the formation of rice ear, rice is the most water-intensive period in its life, especially in the meiosis period, which is more sensitive to the response of water. At this time, if there is water shortage, the spikelets will be degraded, resulting in short spikes, few grains, and more empty shells. Therefore, during the period from booting of rice straw to heading, it is necessary to maintain a 3 cm layer of water in the field and increase grain growth. 4. Wet and dry seeds. After heading and flowering of rice, the leaves stopped growing, the stems and leaves no longer elongate, the development of spikelets was completed, and the water requirement for seedlings decreased. In order to strengthen air permeability in the field, reduce disease occurrence, increase root vitality, prevent premature leaf decay, and promote sturdy stalks, dry and wet and wet methods should be adopted to achieve water-based gas regulation, and gas and root culture should be achieved. Take root protection leaves, with the purpose of seedlings. Cooking Sauce,Sauce For Cooking,Bbq Cooking Sauce,Asian Cooking Sauces Desly Foods Co.,Ltd. , https://www.deslygroup.com