Managing Nitrogen Toxicity in the Soilless Culture System: A Review

Abstract

The use of nitrogen in soilless cultivation, particularly in hydroponics, is pivotal for robust crop growth. This review explores the multifaceted aspects of nitrogen source management in hydroponic systems, scrutinising its sources, deficiency thresholds, optimal concentrations, and the consequences of its toxicity. Understanding the importance of maintaining adequate nitrogen levels for optimal crop production is underscored, emphasising its correlation with yield and quality. A thorough discussion on the factors that contribute to nitrogen toxicity is presented, considering the observable symptoms on crops cultivated in hydroponic systems. Furthermore, this review investigates preventive approaches against nitrogen toxicity in hydroponic setups, highlighting strategies to enhance nitrogen utilisation efficiency while mitigating toxic accumulation. Specifically, the role of urea as a potential mitigator in alleviating nitrogen toxicity is examined, presenting insights into its application and efficacy within hydroponic environments. Moreover, the article discusses the interconnectedness between the usage of nitrogen sources in hydroponics and human health, emphasising the importance of safe and sustainable nitrogen source usage. By gathering information from existing research and methodologies, this review provides a comprehensive guide for practitioners and researchers, aiming to optimise nitrogen source utilisation, foster crop yield, and ensure the safety of both plants and consumers in soilless cultivation systems.