Researchers at the National University of Singapore (NUS) have created dissolving microneedle patches that deliver biofertiliser directly into plant tissues. In greenhouse trials, crops like Choy Sum and Kale grew faster, with increased shoot biomass, leaf area, and height. They also used over 15 percent less biofertiliser compared to traditional soil application methods.
This innovative approach offers more precise fertiliser delivery, reducing waste and minimizing environmental impact. It is especially suited for urban and vertical farms, as well as high-value crops that benefit from controlled dosing.
Biofertiliser contains beneficial bacteria and fungi that help crops absorb nutrients and tolerate stress. Typically, biofertiliser is added to soil, but it often struggles to reach the roots due to competition with native microbes and soil conditions such as acidity. Much of the input fails to reach the plant’s roots, limiting its effectiveness.
The new method developed by the NUS team bypasses these issues by placing beneficial microbes directly into leaves or stems. This accelerates crop growth and enhances efficiency. The team was inspired by how microbes migrate within the human body, hypothesizing that microbes delivered into plant tissues could travel to the roots effectively.
Assistant Professor Andy Tay from the Department of Biomedical Engineering led the research. He explained that delivering microbes directly into plant tissues allows them to perform their functions better and be less affected by soil conditions. This targeted delivery could revolutionize fertilisation practices, making them more sustainable and efficient.
The study highlights a promising new technique for improving crop production while reducing environmental impacts, with potential applications in urban farming and precision agriculture.
