Nano-Bubble Oxygenated Irrigation on the Root Respiration and Nutrient Acquisition of Asparagus officinalis in Heavy Clay Soils

Abstract

Efficient irrigation strategies are essential for sustaining crop productivity in heavy clay soils, where poor aeration often limits root function and nutrient uptake. This study evaluates the impact of nano-bubble oxygenated irrigation on root respiration and nutrient acquisition of Asparagus officinalis cultivated under heavy clay soil conditions. A controlled field experiment was conducted to compare conventional irrigation practices with nano-bubble oxygen-enriched water application, focusing on key physiological and agronomic parameters. Results indicated that nano-bubble oxygenation significantly improved soil oxygen availability, leading to enhanced root respiration rates and greater root biomass development. Improved rhizospheric conditions facilitated increased uptake of essential nutrients, particularly nitrogen, phosphorus, and potassium, thereby promoting overall plant vigor and productivity. The treatment also contributed to better soil structure and reduced anaerobic stress, which are common constraints in clay-rich soils. While analytical tools were employed for monitoring and data interpretation, the primary emphasis of the study remained on understanding plant–soil interactions and optimizing agronomic performance. The findings demonstrate that integrating oxygenated irrigation techniques can effectively address aeration-related limitations in heavy soils, offering a sustainable approach to improving crop performance and resource-use efficiency. This research contributes to advancing irrigation management practices and supports the development of climate-resilient agricultural systems by enhancing productivity while maintaining soil health.