What is water-saving irrigation?

Water-saving irrigation system is to optimize the allocation of limited irrigation water during crop growth to improve the conversion efficiency of irrigation water to root storage and photosynthetic products to economic output. In the case of sufficient water resources, adopt timely and moderate water-saving irrigation; In the case of insufficient water supply, insufficient irrigation, regulated deficit irrigation and low quota irrigation. Restricting crop water supply can generally save water by 30% ~ 40%, but it has no obvious effect on yield. Formulating water-saving and high-efficiency irrigation system generally does not need to increase a lot of investment, but only needs to optimize the allocation of irrigation water in time according to the growth and development law of crops, which is easy for farmers to master. It is a water-saving management measure with less investment and remarkable effect.

Water-saving irrigation system can be divided into water-saving irrigation system with sufficient water supply and water-saving irrigation system with insufficient water supply. Adequate irrigation means that the water supply is sufficient to meet the water demand of crops. At this time, the water-saving irrigation system should carry out timely and appropriate irrigation on crops according to the water demand law of crops, meteorology, crop growth and development status and soil moisture, so that they will not be subjected to water stress during their growth, obtain a reasonable distribution of high-yield irrigation amount and irrigation time, and do not produce surface runoff and deep leakage, so as to ensure the highest yield and high water productivity. In the case of insufficient water supply, water-saving irrigation system is to optimize the distribution of limited water between crops or crop growth periods in order to ensure the water consumption of various crops in the water-sensitive period and reduce the water supply in the water-insensitive period. At this time, the pursuit is not the highest output per unit area, but the maximum total output value of the whole irrigation area.