Water-saving irrigation method

Abstract

The invention provides a water-saving irrigation method. The water-saving irrigation method comprises the following steps that 1, in the period of seedling establishment, the irrigation upper limit is 20 mm field surface water layer, and the rain storage upper limit is 35-50 mm filed surface water depth; 2, in the tillering stage, when the soil water-burying depth sandy soil is 60 mm, the loam soil is 80mm and the clay soil is 100 mm, the water irrigation layer is 10-20 mm; the rain storage upper limit is 70-85 mm field surface water depth; 3, in the elongation stage, when the soil water-burying depth sandy soil is 120 mm, the loam soil is 180 mm and the clay soil is 200 mm, the water irrigation layer is 10-20 mm; the rain storage upper limit is 180-200 mm field surface water depth; 4, in the ear growing period, when the soil water-burying depth sandy soil is 100 mm, the loam soil is 120 mm and the clay soil is 140 mm, the water irrigation layer is 10-20 mm; the rain storage upper limit is 220-250 mm field surface water depth; 5, in the period of heading to flowering, when the soil water-burying depth sandy soil is 70 mm, the loam soil is 90 mm and the clay soil is 110 mm, and the water irrigation layer is 10-20 mm; the rain storage upper limit is 110-140 mm field surface water depth; 6, in the yellow ripening stage, natural soil drying is allowed, and no water irrigation is conducted. The water-saving irrigation method is simple, practical and reliable, is easily grasped by farmers, and can be applied to large-scale production.

Description

technical field [0001] The invention relates to the technical field of agricultural irrigation, in particular to a water-saving irrigation method. Background technique [0002] Water scarcity is the primary agricultural and ecological problem facing the world. Drought is a global problem that seriously affects world food security. Global climate change makes this situation even more critical. According to a report released by UNESCO at the Fifth Water Resources Forum, if the world does not improve the efficiency of water resource utilization, half of the world's population will live in a water-scarce environment by 2030. For a long time to come, the lack of water resources in some arid and semi-arid regions will have a major impact on population mobility. It is estimated that 24 million to 700 million people will be displaced due to water shortage. [0003] my country's per capita and per mu water resources are far below the world average, and it is one of the 13 water-poor...

AI Technical Summary

Problems solved by technology

[0004] Disadvantages of the existing rice irrigation technology: no matter what irrigation mode is used, irrigation is performed based on experience or soil appearance, lack of precise quantitative indicators for irrigation, and the appearance of soil varies greatly depending on the type of soil; Irrigation according to the appearance of the soil is difficult to achieve precise and quantitative irrigation, and it is difficult to achieve the consistency of soil water supply and rice plant water demand, and it is difficult to meet the requirements of high yield and water saving

In addition, the relationship between rainfall utilization and irrigation is not fully coordinated, which is not conducive to the improvement of rainfall utilization rate in paddy field irrigation and the further saving of irrigation water resources.

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