نوع مقاله : مقاله پژوهشی
نویسندگان
1 بخش علوم خاک، دانشکده کشاورزی، دانشگاه ارومیه، ارومیه – ایران
2 دانشکده کشاورزی دانشگاه ارومیه
3 بخش علوم خاک، دانشکده کشاورزی، دانشگاه تربیت مدرس تهران، تهران– ایران
4 مرکز تحقیقات دارویی، مؤسسه فناوری دارویی، دانشگاه علوم پزشکی مشهد، مشهد-ایران
5 مرکز تحقیقات خاک و آب، مرکز تحقیقات و آموزش منابع طبیعی و کشاورزی، ارومیه-ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
This study aimed to synthesize two novel zinc nanocarriers, carbon-dots (ZnO/CDs) and mesoporous silica (ZnO/SiO2), as slow-release zinc fertilizers and to compare their effects with ZnSO4 on Zn concentration and yield of grain and shoot, as well as the zinc recovery efficiency across four bread wheat varieties under calcareous soil conditions. After synthesis, their size, surface structure, and elemental composition were characterized. A greenhouse experiment was carried out in a factorial arrangement with seven treatments, including three zinc fertilizer sources (ZnO/CDs, ZnO/SiO₂, and ZnSO₄), two application methods (soil application at 5 mg kg⁻¹ and foliar-spraying at 0.02% w/v), and four wheat cultivars (Heidary, Pishgam, Mihan, and Heyran) during 2023. The results showed that foliar-spraying of ZnO/SiO₂ resulted in the highest grain zinc concentration (38 mg kg⁻¹) and shoot zinc concentration (56 mg kg⁻¹) in both Heyran and Heidary. The highest grain and shoot yields were also observed under this treatment in the same cultivars. Soil incubation results indicated that zinc release from ZnO/SiO₂ and ZnO/CDs occurred gradually. Within 20 days, approximately 28% and 42%, respectively, of the initial Zn²⁺ concentration (2 mg kg⁻¹) was released, whereas 100% of Zn²⁺ from ZnSO₄ was released during this period. Zinc recovery efficiency in response to zinc sources varied significantly among genotypes and was affected by fertilizer type, and wheat genotype. The highest zinc recovery efficiency was obtained with foliar-spraying of ZnO/SiO₂ in Heyran and Heidary cultivars, while the lowest efficiency was associated with soil application of ZnSO₄ in Pishgam and Mihan cultivars.
کلیدواژهها [English]