SU1409726A1 - Method of maintaining water duty in rice plot - Google Patents

Description

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ABOUT)

I The invention relates to agriculture, namely rice, and can be used in engineering rice irrigation systems,; The known method of maintaining water regime in rice, including the periodic flooding of checks and maintaining a certain level of water in it, is usually relieved by significant filtration losses of water, for reducing which waterproofing barriers are arranged.

The disadvantage of this method is its low efficiency, so 1ac applied on a part of the area, it provides complete elimination of filtration losses, and only a few 1.0 reduce them. Attempts to completely waterproof the entire check do not give a result, since they unacceptably violate the natural processes of maintaining the fertility of the soil and, moreover, match the costs of labor.

The closest in technical essence to the invention is a method that provides for the annual treatment of the soil over the entire surface to a certain depth by mixing

ge with an aqueous solution of polyacrylamide which reduces the water resistance of the soil

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1LETNESS.

The disadvantage of this method is that it reduces filtration losses without completely eliminating them. In addition, I glue together things (hardness, accumulating in the soil, reduces its fertility.

: The purpose of the invention is to eliminate the number of disadvantages, i.e. liquidation, Tsatsi filtration losses in the check.

The goal is achieved by creating an air-dip horizon under the entire plane of the check by blocking the active porosity of the soil under the guard shafts of the checks.

In this case, it is advisable to block iHHe active porosity at: a depth exceeding the blotch depth of 1–5 times the soil one and a half to two times.

The invention is based on the fact that the vertical filtration of water through the plane of rice paddies is formed mainly in the topsoil, which has a lower water permeability than the lower substrates. Soils At the same time, the active pores of the soil (pores with a diameter greater than 1 mm) with

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the heating of the fields is blocked by compaction of air in them and the formation of air plugs which prevent the closure of irrigation and groundwater. The infiltration of irrigation water into the underlying horizons and discharge channels occurs due to the influence of horizontal filtration, which promotes the gradual displacement of air from the active pores, and this process starts around the perimeter and spreads gradually towards the center of the check.

In accordance with the invention, before filling the check with water under the shafts, enclosing it along the contour, the active porosity in the soil is blocked to a depth determined with such a calculation. that it is 1.5–2 times greater than the depth of soil wetting, i.e. the depth of formation of a layer with air trapped in the pores, depending on the soil structure, is 0.3-0.8 m. Practically the blocking depth is 0.5-1.5 m. The blocking operation is carried out by any known method as stationary , made during the construction of a check, for example, laying a vertical insulating film, making a clay-filled groove or treating the soil with vibro-compaction, as well as seasonal, for example, by injection of a hydrophobic substance along the contour.

After the operation of blocking the active porosity, the check is flooded with water, and at each periodic or long-term flooding, a water-permeable air-ground horizon is created under the entire plane of the check, maintaining a certain level of water in the check.

The features of the method are such that the specified waterproof air-soil horizon is maintained only for the time of maintaining the water regime in the check and does not prevent the aeration of the soil and other natural processes occurring in it.

The effectiveness of the invention manifests itself in saving 25-30% of irrigation water, in improving the ameliorative condition of the lands in connection with their rapid aeration after the discharge of water from the check, which contributes to increasing the yield and improving the sanitary condition of the environment, since filtration water will not take pesticides and fertilizers uncontrolled into the external environment.

Claims (2)

1. METHOD FOR MAINTAINING WATER REGIME IN A RICE CHECK, including periodic flooding of checks and maintaining a certain water level in them, characterized in that, in order to eliminate filtering losses in the check, a waterproof air-ground horizon is created under the entire plane of the check by blocking the active porosity of the soil under the enclosing walls rolls of checks. 2. The method according to π. 1, from l and h a -. The fact is that the blocking of active porosity is performed to a depth exceeding the soil wetting depth by 1.5–2 times. <g ω About ςο m KE