WATER REGIME OF SOIL UNDER DRIP IRRIGATION OF COTTON IN THE LOWE VOLGA REGION

Main Article Content

E.A. Khodiakov
S.G. Milovanov
K.V. Bondarenko

Abstract

The article presents the results of the research of 4 drip irrigation regimes with the maintenance of the Soil Pre-Irrigation Moisture (SPIM) 65–65–60, 70–70–65, 75–75–70 and 80–80–75 % of Full Moisture Capacity (FMC) in the Lower Volga region, which, in combination with the introduction of mineral fertilizers with the doses of N140P60K45 kg / ha allowed to obtain an average yield of raw cotton 3.06 ... 4.51 t / ha. The highest yield of raw cotton of 4.51 t / ha was obtained while maintaining SPIM 75–75–70 % FMC. Analysis of the water regime of the soil showed that in the structure of the Total water consumption, irrigation water was 43.3 ... 51.9, moisture input from rainfall – 27.1 ... 28.5 and from the soil – 21.3 ... 28.2 %. On the control plot, with furrow irrigation with SPIM 75–75–70 % FMC the amount of moisture in the soil decreased to an average of 3.5 %, moisture input from rain – to 17.0 %, while the irrigation water increased to 79.5 %. At the same time, the value of Total water consumption, in comparison with drip irrigation, increased by 154.3 mm / ha or by 62.2 %, and the value of the Volume of irrigation water – by 198.5 mm/ha or by 2.6 times. As a result, with furrow irrigation it was obtained the yield of 3.08 t / ha, which was on 1.37 t / ha or 30.8 % less than with drip irrigation.

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Article Details

Section
Crop production

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