Effect of Moisture Depletion and Perlite Levels on Specific Hydraulic Standards and Water Use Efficiency for Potatoes under Drip Irrigation System

Abstract

A field experiment was carried out In Hamdhiya Research StaUon northern Rama di in Iraq at fall season of 2019, to study the effect of moisture depletion (MDPR) and perllte levels (PL) on some water standards, growth, and yield of potatoes under the drip lnigaUon system. The experiment Involved two factors: moisture depletion ratios (MDPRs) with two levels 25% (D,.) and 50% (D,.) of avallable water and three levels of perllte (Pls), 0% (P,), 5% (P,) and 10% (P,) of soil volume. The Revara type B potato culUvarwas sown on 11~ September 2019 In silty loam texture soil. lnigatlon was scheduled at 25 and 50% of available water based on the U.S. Evaporation Pan Class A. The D,.P ,combination gave the lowest bulk density (1.390 MPCM) whereas the highest e was 1 .488 MPCM for D,.P, combination. The values of water infiltration rate decreased at the end growing season compared with Its pre-farm values (10.35 cm h·') for all treatments, the highest WIR was 9.46 cm h'' of D,.P, comblnatJon, while the least e was 6.70 cm h·' In D,.P, combination. The best 1 / 1/UE was in D,.P, combination (94.07 kg m., KPCM) compared with other combinati