ROLE OF ACIDIFIED WATER, PHOSPHORUS, IRON AND ZINC LEVELS IN NUTRIENT UPTAKE OF P, Fe, Zn AND PRODUCTIVITY OF CABBAGE

Abstract

A field experiment was conducted to study the role of acidified water, phosphorus, iron and zinc levels in nutrient uptake of P, Fe, Zn and the productivity of Cabbage (Brassica Oleracea L.) in the field of agricultural engineering sciences university of Baghdad/ Iraq for autumn season 2021 in silty loam texture soil classified to sub under great group Typic-Torriflovent. A Randomized Complete Block Design (RCBD) was used with three replicates including acidified water with Sulphuric acid H₂SO₄ added at concentration of (0 and 0.02 N) with irrigation water using drip irrigation system, phosphorus was added to the soil at a level of (0, 50, 75 and 100%) from the fertile recommendation (65 kg P ha^-1), iron was added to the soil at a level of 10 kg Fe ha^-1, and zinc was added to the soil at a level of 5 kg Zn ha^-1. The results show that there were significant effect of a result of adding Sulfuric acid H₂SO₄, Phosphorus, Iron and Zinc to the soil and their interactions on phosphorus, iron and zinc uptake in the leaves, head diameter and plant yield, However, the addition of Sulfuric acid, Phosphorus and zinc to the soil (0.02 N + 65 kg P ha^-1 + 5 kg Zn ha^-1 ) achieved the highest of phosphorus, iron and zinc uptake in the leaves which was 2029.44 mg P plant^-1, 588.808 mg Fe plant^-1 and 240.319 mg Zn plant^-1 respectively and head diameter was 19.04 cm and plant yield was 1.82 kg plant^-1 with an increasing of 55.55% compared to the A₀P₀S₀ treatment which achieved a head weight of 1.17 kg plant^-1.

We recommend to adding Sulphuric acid, Phosphorus and zinc for increasing the availability of phosphorus and micronutrients in soil that are necessary for plant growth