Sustainability of Arachis hypogaea L. Yield and Evaluation Water Productivity under Different Irrigation Systems and Intervals

Abstract

      A field three experiment was conducted during the spring season 2021 in Baghdad Governorate/ Independence- Al-Rashdyah District, located at latitude 33˚06 ˉ31˭ north and longitude 44˚16ˉ39˭ east and at an altitude of 37.3 m above sea level during the summer season 2021. Experiments were carried out separately and included three irrigation systems, which are subsurface drip irrigation, sprinkler irrigation, and furrow irrigation. Each irrigation system was implemented as a by using Nested-Factorial Experiments Design, where a worker distributed irrigation intervals and three irrigation intervals (2, 4, 6 days) on the main plots, Then the main factor was divided into four replications in which the three levels of organic fertilization (Orgevite) (secondary plots) were distributed (control without addition, 500 kg dunum⁻¹ and 1000 kg dunum⁻¹) randomly, the results were as follows:

1. The highest depth of water added at the irrigation level every 4 days for the sub-surface drip irrigation and furrow irrigation systems was 362.35 and 584.86 mm, respectively, While the highest depth of water added to the sprinkler irrigation system was 507.02 mm when irrigating every 2 days.
2. The sub surface drip irrigation system and the furrow irrigation system excelled without significant differences between them with the highest total yield of pods amounting to 8.45 and 9.02 Ton ha^-1 compared to the sprinkler irrigation system with an average of 6.76 Ton ha^-1. Subsurface drip irrigation excelled with the highest water productivity of 2.331 kg m^-3, compared to the sprinkler and furrow irrigation systems, with an average of 1.337 and 1.546 kg m^-3, respectively.