Abstract
A field experiment was carried out in the winter season (2024-2025) at the Second Agricultural Research Station of the College of Agriculture, Al-Muthanna University. This study sought to investigate the impact of genetic components and varying quantities of organic and mineral fertilizers on some characteristics of wheat. The experiment examined two variables: varying applications of organic and mineral fertilizers, specifically: 100% of the recommended mineral fertilizer, half the recommended mineral fertilizer NPK combined with half the recommended organic fertilizer, ¾ of the recommended mineral fertilizer paired with ¼ of the recommended organic fertilizer, and ¾ of the recommended organic fertilizer alongside ¼ of the recommended mineral fertilizer which is symbolized by F1, F2, F3 and F4 . The second variable involved genotypes of durum wheat, including EXAD 1105, EXAD 65, EXAD 1229, and Bohoth 7 which is symbolized by G1, G2, G3 and G4. The experiment utilized a split-plot design within a randomized complete block design (R.C.B.D) with three replicates. The main plots were fertilizer quantities, whereas the subplots were genotypes. The findings indicated the The G3 genotype excelled in plant height at 110.31 cm, and leaf area at 43.16 cm², The G2 genotype exhibited superior performance in achieving the greatest average chlorophyll content at 48.30%, spike length at 13.02 cm, and grain count per spike at 60.11 grains.
The F1 fertilization level exhibited superior performance, achieving the maximum average plant height of 103.90 cm and a leaf area of 43.77 cm². The F3 fertilization level excelled in producing a total of 357.58 tillers, with 350.75 tillers m-2, chlorophyll content of 49.61%, spike length of 12.83 cm, and a grain count per spike of 55.37.
The G3XF1 combination excelled in plant height at 117.83 cm, but the G2XF3 combination excelled in leaf area at 49.37 cm². The G1XF3 combination excelled in tiller count with 395.67 tillers m-2, whereas the G3XF3 combination excelled in chlorophyll content at 54.92% and spike length at 14.07 cm.
The F1 fertilization level exhibited superior performance, achieving the maximum average plant height of 103.90 cm and a leaf area of 43.77 cm². The F3 fertilization level excelled in producing a total of 357.58 tillers, with 350.75 tillers m-2, chlorophyll content of 49.61%, spike length of 12.83 cm, and a grain count per spike of 55.37.
The G3XF1 combination excelled in plant height at 117.83 cm, but the G2XF3 combination excelled in leaf area at 49.37 cm². The G1XF3 combination excelled in tiller count with 395.67 tillers m-2, whereas the G3XF3 combination excelled in chlorophyll content at 54.92% and spike length at 14.07 cm.
Keywords
Durum Wheat
Mineral fertilizers
Organic Fertilizers
Wheat genotypes