Blueberry cultivation under different nitrogen sources: A review

Background: Global blueberry production has proliferated in recent years, driven by the increasing consumer awareness of its nutritional benefits. Blueberry is considered a rich source of antioxidants, believed to contribute to several health benefits, including maintaining heart health and protecting against cellular damage. Aim: This review critically evaluated the existing literature on blueberry cultivation using different nitrogen sources and identified research gaps needing further investigation. Setting: This review provides an overview of blueberry cultivation under different nitrogen sources. Methods: A literature search for existing information on blueberry cultivation under different nitrogen sources was conducted using online databases via the Cape Peninsula University of Technology (CPUT) library website database. Results: Findings suggest that nitrogen sources significantly affect the productivity of blueberries, with ammonium producing better results than nitrate. There is a noticeable gap in the literature on how different nitrogen sources influence the biosynthesis of secondary metabolites in blueberries. Conclusion: The review revealed that there are few research studies on blueberry cultivation under different nitrogen sources. Given the nutritional and antioxidant significance of blueberry secondary metabolites, further research is critical. Contribution: Information gained can aid in understanding different nitrogen sources of nutrition in blueberries. Insights from this research can inform nitrogen management strategies in blueberry cultivation. This is important for sustaining production trends and ensuring the economic viability of the industry.