Greenhouse pot study links urea-mesoporous silica to improved rice–wheat performance

In a greenhouse pot experiment covering a rice–wheat sequence, a urea–mesoporous nano-silica nanocomposite produced the highest grain yield, straw yield, nitrogen content and nitrogen uptake in the treatment identified in the study abstract as N120 (Urea-mNS)-P60-K40. A separate treatment, N90 (Urea-mNS)-P60-K40, was associated with higher soil availability of nitrogen, phosphorus and potassium, as well as greater microbial population and dehydrogenase activity.

This was an experimental agricultural study rather than a review, protocol, simulation or laboratory model. Researchers synthesized mesoporous nano-silica and reduced graphene oxide materials carrying urea, then evaluated the resulting nanocomposites in a greenhouse rice–wheat pot sequence. The abstract does not report the number of pots or replicates, the greenhouse location, statistical uncertainty or the duration of the sequence, so the scale and generalizability of the findings cannot be assessed from the available information.

According to the abstract, the researchers characterized the nanocomposites using Fourier-transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, scanning and transmission electron microscopy, X-ray diffraction and selected-area electron diffraction. FTIR showed N–H and C=O stretching patterns, which the authors interpreted as evidence that urea had been incorporated into the nanomaterial framework. SEM and TEM indicated interface structures on the silica and graphene surfaces associated with urea engraftment.

Results differed between the two material systems and among nitrogen treatments. The rice–wheat yield, nitrogen-content and nitrogen-uptake results favored the urea–mesoporous nano-silica treatment N120 (Urea-mNS)-P60-K40, while the soil-health measurements reported for N90 (Urea-mNS)-P60-K40 included available nitrogen, phosphorus and potassium, microbial population and dehydrogenase activity. In contrast, reduced-graphene-oxide-based nanocomposites were reported to reduce crop performance, nutrient availability and microbial activity at higher nitrogen levels.

The findings are limited to the tested greenhouse pot conditions and the treatments described in the abstract. The authors characterized the mesoporous nano-silica formulations as promising agricultural nutrient carriers, but said dedicated release studies are needed to confirm controlled nutrient-release behavior. The abstract also indicated that reduced-graphene-oxide formulations require tailored strategies rather than direct transfer of the silica results.

Subject of Research: Greenhouse evaluation of urea-based nanomaterial composites in rice–wheat cropping and soil health

Article Title: Characterization and functional evaluation of urea-mesoporous nano-silica and urea-reduced graphene oxide nanocomposites on rice–wheat and soil health

Article References: V, M. S., Durgude, S. A., Ram, S., Isha, Gorde, N. B., Singh, S. V., Anil, A. S., Maurya, R., Gupta, D., Nakhate, P., Hange, M., Sambare, S. R., Chauhan, A. P. S., Kumar, P., Sharma, R., & Padhan, S. R. (2026). Characterization and functional evaluation of urea-mesoporous nano-silica and urea-reduced graphene oxide nanocomposites on rice–wheat and soil health. Discover Sustainability. https://doi.org/10.1007/s43621-026-04426-9

Image Credits: AI Generated

DOI: 10.1007/s43621-026-04426-9

Keywords: greenhouse pot study, rice–wheat sequence, urea nanocomposites, mesoporous nano-silica, reduced graphene oxide, crop yield, nitrogen uptake, soil nutrients, microbial activity, dehydrogenase activity, Characterization, functional