Zinc Oxide Nanoparticles Enhance Grain Yield and Nutritional Quality in Rice via Improved Photosynthesis and Zinc Bioavailability

Improving rice yield, eating quality, and zinc (Zn) nutrition is crucial to meet the grow- ing demand for high-quality and nutritious food, while zinc itself plays a pivotal role in rice growth and quality formation. In this two-year field study, we investigated the effects of zinc oxide nanoparticles (ZnO NPs) one-time foliar application at 5, 10, and 20 mg L−1 during the gestation stage on grain yield, rice quality, and zinc biofortification. Although some year-to-year variations and year ×...