إنتاج الشعير باستعمال ري التنقيط تحت السطحي في تربة صحراوية جنوب العراق

Abstract EN

A subsurface drip system was used to manage barley irrigation in order to investigate the possibility of producing a high density field crop.

Test the effect of two position depths of 20 and 40 cm drip tubes placed at three distances of 50, 75 and 100 cm to evaluate grain yield and dry matter yield.

The comparison was made with a surface irrigation by basins.

The experiment was carried out in desert soil in the southwest of Al-Diwaniyah Governorate during the agricultural season 2018-2019, and the experiment was designed according to the RCBD design according to the nested factorial design with three replications.

The quantity of irrigation water and the dates of irrigation were determined based on the measurements of soil moisture content by weight method before and after irrigation and the delivery of moisture when irrigation to the limits of the soil field capacity, based on effective root depth.

The results showed that the best grain yield and dry matter yield of barley were at a distance of 50 cm with depth of 20 cm, which were 5.28 and 12.58 tons ha-1, respectively.

Whereas, the treatment of distance of 100 cm and depth of 40 cm gave the lowest grain yield (2.05 tons ha-1) and the lowest dry matter yield (6.40 tons ha-1).

The results also showed that the efficiency of using added irrigation water decreased with the increase of the distance between the drip lines, and it reached 1.278, 0.982 and 0.802 kg m-3 for distances of 50, 75 and 100 cm, respectively.

While the surface irrigation treatment gave the lowest field water use efficiency, and it reached 0.662 kg m-3.