APPLICATION OF HYDROCALC PROGRAM TO CHOOSE THE OPTIMUM DRIP IRRIGATION SYSTEM DESIGN

A field experiment was conducted in Dhi-Qar Governorate, Al-Gharaf district, Al-Salem area adjacent to the Al-Gharaf river at longitude 31 ° 17?55 ? N and width 46 ° 14?30 ? E. This study was conducted in the autumn season of 2018 in clay-texture soil, to evaluate some of the drip irrigation system design parameters in the hydraulic properties of system, soil characteristics, growth, and yield of corn (Zea mays L.), and the economic feasibility of each system, emitters discharge treatments (2, 4, 6 and 8 L.hr-1), the distance between the emitter treatments were 20, 30 and 40 cm, and the lengths of field pipes were 10, 15 and 20 m. The main results showed emitters discharge exceeded 8 L.hr-1 by 0.747 m.day-1, whereas it was 0.612, 0.512 and 0.348 m.day-1 for the treatments 6, 4 and 2 L.hr-1 respectively at the beginning of the growing season, while at the end of the season, the values were 0.907, 0.701, 0.589 and 0.461 m.day-1 for 8, 6, 4 and 2 L.hr-1. The distance 20 cm between emitters was significantly increasing in the hydraulic conductivity values by 11.92%, 32.98% compared with the 30 and 40 cm treatments, respectively, which amounted to 0.629 m.day-1. at the end of the season the values were 0.769, 0.669 and 0.539 m.day-1 for 20, 30 and 40 cm treatments respectively, while the treatment of field length of 10 m recorded the highest values at the beginning of the season by 0.661 the lowest values were 0.571 and 0.433 m.day-1 respectively, with a decline of 13.61%, 34.49% compared to the treatment of 10 m. At the end of the growing season, the values were 0.769, 0.678 and 0.547 m.day-1 for transactions 10, 15 and 20 m, respectively.

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ESTIMATION OF CONSUMPTIVE USE OF POTATO CROP PIANTED UNDER DRIP IRRIGATION SYSTEM BY USING SWRT TECHNOLOGY

Al-Qadisiyah Journal For Agriculture Sciences (QJAS) (P-ISSN 2077-5822 E-ISSN 2617-1479) ◽

10.33794/qjas.vol10.iss1.109 ◽

2020 ◽

Vol 10 (1) ◽

pp. 271-282

Author(s):

J.N. Abedalrahman ◽

R.J. Mansor ◽

D.R. Abass

Keyword(s):

Water Consumption ◽

Drip Irrigation ◽

Soil Depth ◽

Irrigation System ◽

Potato Crop ◽

Block Design ◽

Organic Fertilizer ◽

Control Treatment ◽

Drip Irrigation System ◽

Spring Season

A field experiment was carried out in the field of the College of Agriculture / University of Wasit, located on longitude 45o 50o 33.5o East and latitude 32o 29o 49.8o North, in Spring season of the agricultural season 2019, in order to estimate the water consumption of potato crop using SWRT technology and under the drip irrigation system. The experiment was designed according to Randomized Complete Block Design (RCBD) with three replications and four treatments that include of the SWRT treatment (the use of plastic films under the plant root area in an engineering style), and the treatment of vegetal fertilizer (using Petmos), organic fertilizer (sheep manure), and the control treatment . Potato tubers (Solanum tuberosum L.) var. Burin was planted for spring season on 10/2/2019 at the soil depth of 5-10 cm. The highest reference water consumption for the potato crop during the season was calculated by Najeeb Kharufa, which was 663.03 mm. The highest actual water consumption for the potato crop during the season for the control treatment was 410.1 mm. The results showed increase in the values of the crop coefficient (Kc) in the stages of tubers formation and tubers filling stage as compared to the vegetative and ripening stages, ranged from 1.37-1.92 for the two stages of tubers formation and tubers filling. The SWRT treatment gave the highest water use efficiency during the season, was 3.46 kg m-3 .

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