SU1428294A1 - Method of watering - Google Patents

Description

(21) 3979049 / 30-15

(22) 11/19/85

(46) 10/07/88 Bul. Number 37

(71) Moscow State University. M.V.Lomonosova

(72) E.V. Shein, O.A. Kharchuk, N. D. Buchkov, and I.I. Gudim (53) 631.347.1 (088.8)

(56) Semash D.P. Irrigation plantations pears. - In the book ..: Pear. - Kiev: Harvest, 1979, p.104-108.

Kanardov V.I. et al. Technique for irrigating pomegranate crops on the sloping lands of the Gissar Valley. - In sb.trudov VNIIGiM: New irrigation technique for the foothill areas of the arid zone. M., 1983, p. 43.

(34) METHOD FOR WATERING.

(57) The invention relates to agriculture and can be used in drip irrigation of gardens. The purpose of the invention is to increase the efficiency of water use by preventing it from seeping beyond the limits of the corrosive / uninhabited layer. The method of irrigation includes supplying water to cover a moisture deficit in the calculated soil layer and reach its wetting front of the lower boundary of the calculated soil; 1 o the soil until the wetting process changes to dry. Thereafter, the water supply is resumed with watering offsets until the calculated norm is issued. At fractional with interruptions for the irrigation rate, a humidification contour is formed with a larger area of humidification in the root-occupied layer — and the absence of water losses deeper than 100 centimeter zone.

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The invention relates to agriculture and can be used for drip irrigation of gardens.

 The invention of the invention is an increase in the efficiency of water use by preventing its penetration beyond the limits of the root layer.

Consider irrigation of the blond garden in a drip way.

According to the results of drilling under a dropper and soil sampling for moisture, the need for irrigation is determined: with a decrease in the relative humidity of less than 70% of HB, irrigation is prescribed. Pivnnuk) the rate is calculated by the outcome of the accumulated moisture at the time of watering of de-Fitzit at the entire depth of intensive drying. The irrigation rate should be equal to the deficit of moisture and cover the deficit of moisture throughout the depth of intensive desiccation. In the case under consideration, the depth of intensive drying is 10 cm, irrigation is 240 liters per tree, and the duration l | olive is 60 hours.

Stable-ionic sensors of tensiometers (electrical or neutron-moisture-measuring) are installed under the drip after 20 cm at a depth of 80-160 cm. in this case 100 cm). After the tensiometer readings are enlarged to increase, the watering is stopped. Before watering, the tensiometric potential of moisture at a depth of 100 cm is 70 kPa, and 80 hours after the start of irrigation, the tensiometric pressure (potential) begins to increase. At the time when the tensiometer readings start to increase, the watering is stopped and the monitor of the tensiometer continues to be monitored.

Initially, when the irrigation is interrupted, the readings of the tensiometer continue to increase, then stabilize after some time (in this case, the Compiler

Editor M.Blanar

Tehred M.Iorgental Corrector M.Pojo

Order 6305 Circulation 661 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

In 46 h), they start to decrease again. At the moment the tensiometer begins to decrease at a depth of 100 cm, watering is resumed. Continue to monitor the sensor readings at a depth of 100 cm. In this case, in the process of issuing the second part of the irrigation rate, no increase in the readings of the tensiometer is noted, and therefore the watering does not stop until the entire irrigation rate. In other conditions, in accordance with the criterion of the change of the processes of draining for moistening, marked with the help of a sensor installed at the depth of intensive draining, watering is again interrupted. Watering is resumed when moisture changes to drying and so on up to the issue of the entire watering rate.

Due to the fractional (with one break) higher irrigation rate, a humidification contour is formed, which differs from the well-known larger area of moisture in the root zone, with the practical absence of water losses deeper than 100 centimeters, which creates better conditions for moisture availability of plants when using the proposed method in comparison with the known one.

Claims (1)

Invention Formula Irrigation method, including water supply before covering the moisture deficit in the calculated soil layer, which, in order to increase the efficiency of water use by preventing its penetration deeper than the root layer, water is supplied to reach the wetting front of the calculated layer. until the moistening process is changed for drying, then the water supply is resumed, while the alternation of water supply with intermittent irrigation is continued until the calculated rate is applied. Gubin