Porous Silica Biofiber: A Reusable, Sustainable Fertilizer Reservoir

Area of Science:

• Agricultural Science
• Materials Science
• Environmental Science

Background:

• Nitrogen fertilizers like urea are inefficient due to leaching, causing crop production issues and environmental pollution.
• Existing slow-release fertilizer technologies often involve costly discrete particles.
• Jute cellulose is explored as a sustainable material for fertilizer encapsulation.

Purpose of the Study:

• To develop a cost-effective and reusable slow-release urea fertilizer system.
• To investigate the use of jute cellulose tethered with silica for enhanced fertilizer retention.
• To evaluate the impact of the composite on urea release kinetics and rice crop chlorophyll content.

Main Methods:

• A composite material was created using jute cellulose as a scaffold and silica as a pore-forming agent.
• The jute-silica composite was tested for urea absorption capacity over multiple cycles.
• Urea release kinetics from the composite were compared to naked porous silica and cellulose.
• The effect of the slow-release fertilizer on chlorophyll content in rice crops was monitored.

Main Results:

• The jute-silica composite demonstrated improved reusability, with ~70% higher absorption capacity in the fifth cycle compared to uncoated fiber.
• Urea release from the composite was significantly reduced, with less than 1/3 and 3/4 released compared to naked porous silica and cellulose, respectively.
• Slow and sustained urea release from the composite led to a continuous increase in chlorophyll content in rice crops.

Conclusions:

• The jute-silica composite offers a promising solution for slow and sustained nitrogen fertilizer release.
• This material enhances fertilizer efficiency, reduces environmental pollution, and supports improved crop health.
• The reusability and cost-effectiveness of the jute-silica composite make it a viable option for sustainable agriculture.