SU1524850A1 - Method of combination watering - Google Patents

Abstract

The invention relates to agriculture and is intended to improve existing methods of irrigation, mainly cotton crop crops in the arid zone, where it is necessary to moisten the entire root layer of soil with the economical use of water. The purpose of the invention is to save and improve the quality of irrigation water use. The goal is achieved by supplying water to a trough irrigator 1, equipped with water outlets in the furrows located above the water outlets in the subsoil humidifiers, with a constant flow rate. The latter is equal to the total consumption of steady-state absorption in the subsurface humidifiers suspended from one section plus the flow of water for traveling in the furrows located between them in the plan. After running through the furrows, the water flow is switched to the next irrigation site, then, if necessary, the cycles are repeated. 1 hp f-ly, 3 ill.

Description

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The invention relates to agriculture and is intended to improve the known methods of irrigating agricultural crops primarily in the arid zone, where it is necessary to moisten the entire root layer while preventing deep and surface discharge of irrigation water.

Tse. 1 of the invention is to save water and improve the quality of use of irrigation water.

FIG. 1 is a graph of the volume of water entering the humidifier network (Wgno) and the furrow network; in fig. 2 - irrigation scheme from a flume sprinkler; in fig. 3 - the distribution of moisture in the soil during irrigation with humidifiers and furrows.

From the chute sprinkler 1 through the vertical, 11P1 branch pipes 2, rising above the bottom of the tray (to enable the transit passage of water to other sections), water enters the group of humidifiers 3 suspended from this section. Humidifiers should be made of corrugated, perforated polyethylene tubes, wrapped with a protective filter made of non-punching material. As the soil around the humidifiers 3 is poured, the absorption capacity of the soil decreases, and the water level in the orussel 1 rises accordingly to the horizon; 1 branch pipes 4, and the water begins to flow into the irrigation grooves 5.

The trough sprinkler 1 is supplied with water flow, equal to the 1 st sum of the flow in the mode of setting the inside of the soil absorption and flow during the period of running water through the furrows. In this case, the advantage in choosing network parameters is recommended by the elements of the subsurface irrigation technique: the optimal length of the humidifiers, the distance between them and the corresponding drop down value. For example, if the length of the humidifiers is 150 m, the distance between them is 1.8 m, and the value of steady-state absorption from the humidifier is 0.15 l / s, then the furrows are the same length and with the same spacing, and the size is 2J

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The fly jet is corrected in proportion to the length of the furrows. On a plot of 0.01 and a length of 150 m, the size of the reaching jet is on average 0.20 l / s.

Thus, at the beginning of irrigation a flow of 0.35 l / s to each subsurface humidifier enters the pan sprinkler. After 2-3 hours absorption from

Q humidifiers decrease, the water level in the tray rises to the line of additional pipes and water begins to flow into the irrigation furrows.

To automate the switching of water between sections of tray sprinklers,

5, a program for the sequence of switching on and off head valves shall be compiled.

The proposed method allows to eliminate unproductive water discharges from

f, trough sprinklers, dramatically reduce irrigation time, use water economically and efficiently, and greatly simplify water distribution.

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Claims (2)

1. The method of combined irrigation. including water supply through the waterway to the outlets in the furrows and subsurface humidifiers, characterized in that, in order to save water and improve the quality of irrigation water, the water is supplied to the trough irrigator having outlets in the furrows located above the outlets in the inner soil humidifiers with a flow rate equal to the total flow rate for steady-state absorption in subsoil humidifiers suspended from one section plus water flow for running water in between the planes located between the furrows Oh. 2. A method according to claim 1, characterized in that 0 after running water until the end of the furrows the water supply is switched to the next irrigation site, then, if necessary, the cycle is repeated. Fi & .З