The root system of rice throwing cultivation is shallow, and the growth in the early stage is strong, and it is easy to fall in the later stage. Therefore, we should take corresponding irrigation measures for different water requirements in different growth stages of rice, coordinate water, fertilizer, gas and heat by adjusting water, and cultivate the ideal plant type and developed robust root system. High yield of transplanted rice. The core of rice throwing water in the field is to control water and regulate gas. The following tips should be mastered. The thin water throwing surface of the water surface is thin, and the shallow muddy cast is shallow, and the sinking of the surface suspended mud can make the seedlings stand fast and firmly rooted, laying a foundation for throwing early fast hair and preventing late lodging. Shallow water and shallow water can play the role of water supply, fertilizer adjustment, ventilation, heat preservation and moisturizing, which is very beneficial to seedlings and tillers. Four or five days after the early rice transplanting, and two or three days after the late rice transplanting, the main attack should be rooted. Therefore, the middle of the field should be kept shallow. In the event of strong winds and heavy rains after early rice transplanting, the water outlet should be opened to let the water flow naturally to avoid deep water floating. One or two days after the late rice transplanting, in case of high temperature weather, the water layer can be properly deepened at around 10:00 in the morning, and the drainage begins after 4 o'clock in the afternoon, and the daily irrigation night row is implemented to prevent high temperature burning and injury. The main target of the field before the release of the field to the sun is to promote the strong roots. During the tillering period, it is necessary to use the field for a short time to facilitate the roots and tillers. Each time the exposure time is two or three days, when the field appears “蚯蚓屎†but the shallow water is re-irrigated when not open, then let it dry naturally, not water. Repeatedly; until the sun. Sunfield control of sun-dried field is an important measure to shape the ideal plant type of rice and prevent late lodging. When 85% of the ear of the early rice development plan and 90% of the ear of the late rice development plan, the roots are controlled in time to promote roots and control the leaves and strong stalks. The drying time is generally 5 days to 8 days earlier than the field where the seedlings are washed. The specific time depends on the weather, the seedlings, and the variety. Sun-dried into the field, silky stalks, white roots running all over, the leaves are slightly faded, and the hard leaves of the stems rehydrate. The period from the ear-splitting stage to the heading stage of deep-water fertility is the period of maximum water demand during the whole growth period of rice. If the water supply is insufficient, the development of rice ear is blocked, the floret is degraded, and the number of solid grains is reduced, resulting in reduced yield. Therefore, it is necessary to raise the tires in deep water during this period. Generally, the water layer should be kept from 3 cm to 3.5 cm deep, but the field should be exposed for a short time in the middle to promote the rapid growth of roots and young ears at the same time, and enhance the ability of rice to absorb and lodging. Long-term deep water in the wet and strong seeds will lead to premature senescence of the roots of the seedlings, but lack of water is not conducive to grain filling. Therefore, the method of pipe water which is mainly wet and alternates between wet and dry should be adopted. In the sunny day, the water is poured once every five or six days, and the rain is drained in time. Keep the field dry and wet, but can not make the field white, promote leaf green, sturdy, root health. 7 days before harvesting, stop the irrigation, so that the rice fields gradually dry, so that the nutrients can be quickly transported to the panicles, turning yellow, but not dehydrating too early, so as not to affect the dry weight.
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