ROLE OF COMPOST AND IRRIGATION WATER QUANTITY ON SOME PHYSICAL PROPERTIES OF SOIL UNDER SURFACE, SUBSURFACE DRIP IRRIGATION

Al-Shamari & Et Al

doi:10.36103/ijas.v51i5.1137

Abstract

A field experiment was conducted in Ramadi district - Al-Anbar province during the autumn season of 2018. to study the role of compost (sheep residues) and irrigation levels in some physical properties of soil and water consumption a potato under surface and subsurface drip irrigation system. Randomized Complete Block Design (RCBD) in arrangement of a split- split-plot with three replication were used.The results showed that the addition of 10 Mg.h-1 resulted in a significant decrease in bulk density (BD) values of 1.12 Mg m-3, and increase in the values of (MWD) and (Ks) to reach 1.47 mm and 10.3 cm. hr -1 respectively. The addition of 50% of the NID reduced the BD to 1.24 Mg m-3, The MWD and SHC were significantly higher to reach 1.24 mm and 8.1 cm hr-1 respectively. WHC increased with increasing of amount of irrigation water as it reached the highest value of 265.66 mm season-1 when adding 100% of the NID. The BD values decreased, whereas MWD and SWC increased under subsurface irrigation (SUBDI) treatment to be 1.23 Mg m-3, 1.24 mm and 8.4 cm hr-1, respectively.

Highlights

The soil organic fertilizers of various sources have a positive important role in the improvement of soil physical properties, increasing water-holding capacity, improvement of porosity, permeability, and bioactivity
The addition of manure at a of 10 tons.h-1 caused the lowest value of bulk density which is 1.14 Mg.m-3 while the 1.25 and 1.33 Mg m-3when adding 5 tons.h-1without the addition of organic fertilizer respectively attributing the reason to the ability of organic fertilizers to improve soil structure through increased porosity, the stability of soil aggregate increased pore percentage, and movement of water and air in the soil
The drip irrigation schedule timed according the value of Epan, system was evaluated at pressures of 40, 50 which is equivalent to exhaustion ratio in and 60 kPa to select the best operating equation (3) as follows: pressure that can be adopted during the growing season and according to the uniformity coefficient of water distribution(UC),the discharge variation (DV)

Summary

Introduction

The soil organic fertilizers of various sources have a positive important role in the improvement of soil physical properties, increasing water-holding capacity, improvement of porosity, permeability, and bioactivity. The addition of manure at a of 10 tons.h-1 caused the lowest value of bulk density which is 1.14 Mg.m-3 while the 1.25 and 1.33 Mg m-3when adding 5 tons.h-1without the addition of organic fertilizer respectively attributing the reason to the ability of organic fertilizers to improve soil structure through increased porosity, the stability of soil aggregate increased pore percentage, and movement of water and air in the soil.

Results

Conclusion