The development of biostimulants for agricultural use presents a significant opportunity for the chemical industry, particularly as demand for sustainable and regenerative farming practices continues to grow.
Fertilizers and herbicides are no longer the sole focus of agricultural chemicals. Biostimulants—a burgeoning category—offer innovative solutions to enhance plant growth, nutrient uptake, and stress tolerance. Unlike fertilizers, biostimulants work synergistically with them to improve plant health and productivity. The 2018 Farm Bill defines biostimulants as substances or microorganisms applied to seeds, plants, or the soil (near roots) to stimulate natural processes that improve nutrient efficiency, abiotic stress tolerance, and crop quality and yield.
Biostimulants have gained traction since the early 2000s. Over the past 30 years, advances in farming practices, such as genetically engineered seeds, improved fertilizers, fungicides, and insecticides, as well as GPS-guided equipment for precision agriculture, have transformed crop management.
These advancements align with regenerative agriculture—a farming philosophy focused on restoring ecosystem health, particularly soil health. For example, research from the University of Illinois shows that corn absorbs most of its nitrogen (67% on average) from natural soil sources rather than applied fertilizers. Biostimulants enhance this process by solubilizing and mobilizing nutrients like nitrogen and phosphorus, increasing their availability and efficiency.
The impact of these practices is evident in the U.S., where soybean and corn yields per acre have increased by 50% over the past three decades. These crops now account for nearly half (47%) of planted cropland in the country.
Biostimulants are derived from a wide range of sources, including amino acids, humic and fulvic acids, protein hydrolysates, seaweed extracts, and beneficial microbes. Among these, seaweed extracts and humic substances are particularly popular due to their effectiveness in boosting plant growth and resilience. However, the diversity of products and applications available creates challenges for farmers in selecting the right solutions for their crops.
With the global biostimulant market reaching 980 million pounds and the North American market valued at nearly $1 billion, there is significant potential for growth. However, much work remains to provide farmers with the knowledge and tools needed for effective adoption. Further research is required to better understand plant-soil interactions, including the dynamic rhizosphere, through controlled greenhouse and field studies tailored to diverse agricultural regions.
Biostimulants represent a transformative opportunity for sustainable agriculture, offering innovative tools to enhance productivity while promoting environmental stewardship.
