Evaluating the Effects of Deficit Irrigation Strategies on Potato (Solanumtuberosum L.) Yield, Tuber Quality and Water use Efficiency
Subject Areas : Research On Crop EcophysiologyBIJAN HAGHIGHATI - BOROUJENI 1
1 - Assistant Prof. of Soil and Water Research Department, Chaharmahal and Bakhtiari Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Shahrekord, Iran
Keywords: water management, arid region, water productivity, Keywords: Irrigation type, Partial-root-zone-drying,
Abstract :
Evaluating the Effects of Deficit Irrigation Strategies on Potato (Solanumtuberosum L.) Yield, Tuber Quality and Water use EfficiencyBijan Haghighati - BoroujeniAssistant Prof. of Soil and Water Research Department, Chaharmahal and Bakhtiari Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Shahrekord, Iran ⃰ Corresponding author Email: bhaghighati@yahoo.com Received: 4 November 2020 Accepted: 15 January 2021AbstractAdopting efficient irrigation strategies is necessary because of climate change and growing population especially in regions that receivelow precipitation. A field experiment was performed at three replications for two years (2013 and 2014) as split-split-plot in Chaharmahal-Va-BakhtiariProvince, Shahrekord.The main plotswereirrigation type (furrow and tape drip irrigation), sub-plots including potato cultivars (Almeraand Burren) and secondary sub-plots were deficit irrigation (DI) managements (FI=100%, RDI80= 80%, RDI65= 65% of available water depletion and partial-root-zone-drying (PRD) during growth period).Influences of these treatments have been studied on tuber yield, dry matter, starch and proline content, water use efficiency (WUE) and water productivity (WP).Results declared that DI management had significant effects at P ≤0.01on entire studied parameters. The highest and lowest tubers yield 52.8 and 25.5 tonha-1 were related to FI and RDI65 treatments, respectively. Tubers yield reduced noticeably by 8% in plants receiving 80% IR and PRD irrigation and by 52% in plants receiving RDI65 irrigation. The means comparison revealed a relationship between PRD and RDI65 for the highest and lowest values of WUE with 14.5 and 8.46 kgm-3, respectively.Additionally, outcomes demonstrated that tape drip irrigation enhanced CPD by 79% compared to furrow irrigation. Means comparison showed that the highest values of CPD with 10.77 kgm-3 was related to Burren cultivar and this cultivar increased CPD by 21% compared to Almera cultivar. Therefore, it is essential to select irrigation method under environmental parameters of plant in order to enhance production per unit of water consumed. These findings highlight the importance of adopting efficient irrigation strategies to optimize water consumption and increase tuber yield in regions facing water scarcity and climate challenges.