Role of Mineral Micronutrient on some Qualitative Traits and Yield of Sweet Pepper Under Protected Cultivation System in Calcareous Soil

Abstract

Abstract In the 2020/2021 agricultural season, a private greenhouse farm in Al-Madaen city/Old Diyala Bridge/Western Tuwaitha Village (N 44,29,47-E 36,33,11) studied the influence of mineral micronutrients on biofortification, growth, and yield of sweet pepper cultivated on calcareous soil. Dutch Oloumpus peppers were planted. The plastic home grew seedlings on 11/11/20202. Nutrients (50 mg Fe) were employed. 60 mg Zn/L. 30 mg Mn/L. L-1 and 25 mg Cu. L-1) of the following salts: ferrous sulfate FeSO4.7H2O Fe=20%, zinc sulfate ZnSO4.7H2O Zn=22.78%, manganese MnSO4.H2O Mn=32.54%, copper CuSO4.5H2O Cu= 25.45%, successively. The split plot design factor experiment had three replications and two techniques of delivering nutrients: spraying the shoots and irrigation. Each technique of addition had 16 treatments, including single, double, triple, and quadruple additions of the nutrients employed in the experiment plus a reference treatment. The first addition came after two weeks of field cultivation, and subsequent addition was one week apart. N, P, and K were utilized at 425, 175, and 250 kg.h-1, respectively. The Fe treatment of irrigation water and the Fe+Mn+Cu treatment of sprayed shoots yielded the greatest vitamin C content of 23.57 mg.100gm-1 fresh weight. The Fe+Mn+Cu treatment had the greatest total soluble solids (TSS) value of 5.8, and all spray application treatments outperformed irrigation water on the vegetative system. Fe+Cu had the highest leaf chlorophyll index of 74.68. The maximum cumulative output was 159.15 Mg.h-1 for Fe+Zn+Mn spraying on shoots.