Study of the major elements (Fe, Zn, Cu) in wheat product (Triticum aestivum L) grown in two soils with different gypsum content and treated with phosphorus and magnesium

• Heba M. M. Al-Hamdany

  Author

A field experiment was conducted during the 2023–2024 growing season at the Research Station of the College of Agriculture, Tikrit University, to study the micronutrient status of wheat grown in two soils with different gypsum contents (5% and 15%) and fertilized with different levels of phosphate and magnesium fertilizers, according to a randomized complete block design (RCBD). Magnesium fertilizer (MgSO4.7H2O) was added at three levels (0, 60, and 120 kgMgh^-1), and phosphate fertilizer (TSP) was added at four levels (0, 60, 80, and 100 kg P ha^-1) in the 5% gypsum soil and (0, 65, 85, and 100 kgph^-1) in the 15% gypsum soil. The results showed that adding phosphate and magnesium fertilizers led to a significant increase in the dry matter yield of wheat at both locations. The level of (80) kgph^-1 in 5% soil and (85) kgph^-1 for phosphorus gave the highest dry matter yield and the highest concentrations of micronutrients (Zn, Cu). At the level of magnesium Mg1 (60 kg Mgh^-1) for both soils, iron Fe exceeded the level of (60 and 65) kg p.h^-1. As for the interaction, the treatment P1Mg1 (80 kgph^-1 + 60 kg Mgh^-1) in 5% gypsum soil and P₁Mg₁ (85 kgph^-1 + 60 kgph^-1) in 15% gypsum soil were superior in giving the highest dry matter yield and the highest amount of absorbed micronutrients (Zn, Cu) by an amount of 68.75, 12.43 for the two elements respectively in 5% soil and (64.36, 12.24) in 15% soil . As for iron (Fe), the Mg1P2 treatment was superior, yielding (133.71, 109.80) at the 5% and 15% gypsum sites, respectively. The high levels of phosphorus (P₃) and magnesium (2Mg) led to a decrease in the dry matter yield and the amounts of micronutrients (Fe, Zn, Cu) absorbed at both sites.

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