تأثير تصميم الري بالتنقيط في كفاءة استعمال المياه و حاصل القرنابيط

الملخص EN

A field experiment was carried out during the 2018-2019 fall season at College of Agricultural Engineering Sciences/Baghdad University with in longitude (33o16′01.2″N) and latitude (44º22′63.4″E).

The area was defined by dimensions of 15×70 m, to study the effect of drip irrigation system design factors on water use efficiency and yield of cauliflower crops.

The experiment was carried out using Nested-Factorial Experiments Design with three replication to study the effect of drip irrigation factors which included discharge )Q( at three levels 4, 6 and 8 L h-1, distances between drip lines )D (with three levels (0.30, 0.40, 0.50) m, distribution dropping lines relative to the plant rows )N( with two levels, at One line for each plant row and One line for Two plant row.

A valuation driping system was made before plating in to identify the actual discharge and calcula the rate of discharge, the uniformity coefficient, Emission Uniformity, Variation Percent, Wetting area and the efficiency of the drip irrigation system.

Cauliflower Brassica oleracea var.

botrytis seedlings planting Class study in 26/9/2018 the form of lines, the distance between one plant and another 0.40 m.

Irrigation scheduled when 50% of ready water is depleted, depending on measuring soil moisture content.

The results showed that the values of the of Uniformity Coefficient 94.74, 95.46 and 97.90% for the charges Q1, Q2 and Q3 respectively.

The values of the Variation Percent 0.18, 0.14 and 0.09 for the charges of Q1, Q2 and Q3 respectively.

We note that increase the discharge of Drippers significantly affected the values of water use efficiency and yield of cauliflower.

Water requirements for cauliflower crop reached 177 mm season-1.