Effect of organic fertilizer and ground feeding with chelated iron & zinc on the concentration of elements in potato(Solanum tuberosum L) tubers in soil with low gypsum content

Abstract

   A field experiment was conducted at research station of soil Department and Water Resources, College of Agriculture, University of Tikrit, for agricultural season 2022 AD, according to the randomized complete block design (RCBD), with eighteen treatments and three replications for the purpose of studying the effect of adding organic fertilizer and ground feeding with iron and chelated zinc on the concentration of elements in potato tubers in low soil. Gypsum content, the experiment included three factors each of organic fertilizer at level of (0, 1)% coded as M₀ and M₁, respectively. Chelated iron with three levels (0,2,4) kg ha^-1 soil, coded as F₀, F₁, and F₂, respectively, and chelated zinc with three levels (0,1.5,3) kg ha^-1 soil, coded as Z₀, Z₁, and Z₂, respectively. The results showed that adding organic fertilizer, iron and chelated zinc separately led to a significant increase in the studied traits (concentration of nitrogen, phosphorus, potassium, iron and zinc in the tubers). The interaction between organic fertilizer, iron and chelated zinc resulted in a significant increase, as the triple interaction treatment M₁F₂Z₂ excelled as it gave the highest values ​​(2.00%, 0.339%, 2.51%, 78.18 mg kg^-1 and 38.11 mg kg^-1) for the above studied traits, respectively, compared to comparison treatment M₀F₀Z₀.