Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : The Hydraulic Performance of Drip Irrigation System with Special Emphasis on the Effects of Deficit Irrigation on Eggplants (Solanum Melongena L.) Under Gezira Conditions, Sudan

Auteur : Musa, Ahmed Musa Yagoub

Université de soutenance : University of Gezira

Grade : Master of Science (MS) in Water Management 2018

Résumé
The increased competition for water among agricultural, industrial and domestic consumers creates the need for continuous improvements in techniques for judicious use of water in crop production. A field experiment was conducted at Horticultural Research Farm (HRF), Gezira Research station (GRS), Wad Medani, Sudan, from April to September 2017. The study was aimed to design and evaluate the hydraulic performance of drip emitters and also to investigate the influence of full and deficit irrigation on eggplant performance and water use efficiency. A drip irrigation system was designed and installed in an open field. The treatments were laid out in a randomized complete block design (RCBD) with three replications. Full-irrigated treatment (T1), deficit irrigated at vegetative stage (T2), deficit irrigated at flowering stage (T3) and deficit irrigated at maturity stage (T4) were applied to long purple variety in Gezira clay soil. The emitters were tested under operating pressure of 1.5 bar. The hydraulic performance results showed that, the Distribution Uniformity (DU), Uniformity Coefficient (Cu%), Flow Variation (Qvar), Percentage emitters clogging (Pclog%) and Coefficient of Variation (CV) were 85%, 94%, 55%, 5% and 28% respectively. Results also showed that irrigation treatments significantly affected yield and yield components. Full-irrigated treatment (T1) and deficit irrigation treatment (T2) showed the highest number of branches, weight of fruit and total yield. The full-irrigated treatment had the highest total yield (30800 kg/ha), T4 scored the lowest total yield (17200 kg/ha), with percentage reduction in yield of 20, 29 and 44%, respectively compared to Full-irrigated treatment. The average values of applied water under full-irrigated treatment were (3750〖 m〗^3/ha), while the average applied water for deficit irrigation treatments (T2, T3 and T4) were (3187.5m^3/ha). The highest values of Irrigation Water Productivity (IWP) were obtained under full irrigation treatment (8.3 kg/m^3), while the lowest values were recorded under the deficit irrigation at fruit ripening stage (5.4 kg/m^3). Results also indicated that exposing eggplant to continuous water stress during maturity stage decreased total yield

Présentation

Version intégrale (1n18 Mb)