Document Type : Original Article
Authors
1
Agricultural Engineering Research Institute (AENRI), Agricultural Research Center (ARC), Giza, Egypt.
2
Department of Water and Irrigation Systems Engineering, Faculty of Agricultural Engineering, Al-Azhar University, Cairo, Egypt.
Abstract
This study was carried out during the months from March to August 2021, in the Gemmeiza Research Station, Gharbeiah Governorate, Egypt. Where the goal of the research was to determine study Hydraulic performance analysis of subsurface drip irrigation for turf-grass within different types of driplines water consumption and maximizes the efficiency of the water productivity in clay soils. The ratio of water retained in the root zone to that applied was used to calculate application efficiency. The paspalum10 turf-grass was selected for its suitability to the conditions of the experiment, to evaluate the effect of deficit irrigation, depths of drip lines, and different types of drip lines on the landscape under subsurface drip irrigation system. The study included three variables, three types of drip lines irrigation hoses (leaky pipe porous, GR, and T-Tape) respectively, laterals were buried at three depths 15, 30 and 45cm, the treatments consisted of three Irrigation systems, full irrigation 100% and deficit irrigation (85 and 70%) of crop water requirement. The results indicated that, the performance of the irrigation system was good. The best of moisture content distribution in the soil of at an application of 85 and 70% for all types of drippers at depths of 15, and 30cm, throughout the turfgrass growth, which affected the increase in the average weight of the turfgrass and the efficiency of water use. The maximum average yield of cutting weight (857 g/m2) in the month when application 100% of the water requirement with GR drip line at 15 cm burial depth was greater than 3.85 and 7.47% compared to leaky pipe porous, and TTape respectively. The highest percentage of water application efficiency (EA) where it was 91 and 88% at application level of 85 and 70% deficit irrigation of the water requirement with 15 depth GR drip line. While the lowest percentage was 72% with 100% level irrigation at 45cm depth and T-Tape drip line. The results showed that the highest value of water productivity was 1.66 and 1.5 kg/m3 at 85 and 70% level irrigation respectively at 15cm burial G.R dripper, while the lowest value of water use efficiency (WUE) was 0.70 kg/m3 at 45cm depth with 100% level irrigation with T-Tape dripper. The results obtained from this study showed that it is possible to save 15 and 30% of the amount of water used to irrigate landscape by using a subsurface drip irrigation system with the deficit irrigation by 85, and 70% with GR drip line at 15cm depth, The result was very close when using 85, and 70% deficit irrigation, with GR drip line at burial depth of 15cm without any noticeable effect on drip performance, moisture content, distribution efficiency and water productivity.
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