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Abstract The experiment was conducted in the canopy of Al-Musaib Technical College during the period from September 2023 until June 2024 to study effect of Rootstock type, organic fertilization, and biofertilization on the growth of grafted Citrus aurantifoia seedlings. According to a completely randomized block design (R.C.B.D.), the results showed that there were significant differences between the Rootstocks. Rootstock sour orange gave the highest averages in all traits, including (seedling height, main stem diameter, number of branches, percentage of phosphorus in leaves, percentage of potassium in leaves, leaf content of Chlorophyll) (77.36 cm, 7.54 mm, 6.95 plant branches, 0.46%, 2.41%, 78.46) respectively. Volkameriana rootstock gave the lowest averages for all traits. The results showed significant differences in vermicomposting fertilization. The concentration (10%) gave the highest averages in (plant height, stem diameter, number of branches, percentage of phosphorus in the stem, percentage of potassium, content The leaves contain chlorophyll (74.95 cm, 7.33 mm, 7.30 plant branches, 0.74%, 2.41%, 80.66) respectively. The results showed significant differences in bio fertilization, as inoculation with the Mycorrhizae fungus (B2) gave the highest averages in (Plant height, stem diameter, number of branches, chlorophyll content of leaves (78.09 cm, 8.98 mm, 8.00 plant branches) respectively, and gave the highest average concentration of (B3) in (percentage of phosphorus, percentage of potassium) (0.50%, 2.56). In comparison with control treatment B0, it gave the lowest averages in (plant height, stem diameter, number of branches, chlorophyll content of leaves). (68.22 cm, 5.13 mm, 4.82, 68.79) respectively. The lowest averages were given at (0.38% and 1.85), respectively. As for the two- and three-way interactions between Rootstocks, vermicompost, and bio fertilization, there are significant differences in some of the studied traits.
Abbas et al. (Mon,) studied this question.