Abstract
The experiment was carried out during the agricultural season 2020-2021 and included two laboratory experiments. The first was carried out in the laboratories of the Department of Chemistry Sciences / College of Education for Pure Sciences / the University of Diyala, It included the preparation of nano-zinc oxide by a deposition method, and the second field was carried out in Baquba nursery / Diyala Agriculture Directorate. The addition of zinc oxide included nanoparticles at concentrations of 75 and 150 mg. L-1 to the nutrient solution of broccoli plants, in order to study the effect of adding different concentrations of zinc oxide nanoparticles to the sulforaphane content of broccoli by using the soilless cultivation technique. The experiment was carried out using a completely randomized design (CRD) and included a study of 4 treatments, with nine repetitions for each treatment. The averages were compared at the probability level of 0.05, the results showed that the treated plants ZnO75 mg.l-1 significantly by recording the highest mean of 140.μg/g fresh weight, While the average of this trait decreased in plants treated with Cooper's full salt solution and ZnO150 mg.l-1, which recorded the lowest value for this trait, which were 39.25 and 41.26 μg/gm fresh weight, respectively. Compared with the control treatment Cooper's solution without zinc recorded an average of 59.59 μg/gm of fresh weight.
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