Summary of Protein hydrolysate-based biostimulants: origin, biological activity and application methods.

Protein Hydrolysate Biostimulants: Enhancing Crop Growth and Quality

Introduction to Protein Hydrolysate Products
Protein Hydrolysate Biostimulants (PHs) are an important class of plant biostimulants made of polypeptides, oligopeptides, and amino acids obtained through partial protein hydrolysis. These products support nutrient uptake, stimulate plant growth, and improve both crop yield and quality. They also help crops cope with abiotic stresses such as drought, salinity, or temperature extremes.

Chemical Composition of Biostimulant Formulations
The effectiveness of protein hydrolysate products depends on their chemical profile. PHs are rich in amino acids and small peptides, which plants absorb efficiently, enhancing metabolism and physiological processes. Different protein sources and hydrolysis methods result in variations that can influence the biostimulant’s performance.

Application Methods for Protein Hydrolysate Products
These plant biostimulants are typically applied as foliar sprays or near the root zone. Foliar applications provide rapid metabolic stimulation, while soil applications promote long-term nutrient absorption. Optimizing timing, frequency, and dosage is essential to achieve the best results under varying environmental conditions.

Impact on Plant Growth, Yield, and Stress Resilience
Research shows that protein hydrolysate products improve plant growth, yield, and produce quality. Commercial formulations, such as the plant-derived product ‘Trainer,’ increase biomass, enhance fruit quality, and boost stress tolerance. Using these biostimulants supports more sustainable farming by reducing losses due to environmental stress.

Conclusion
Protein Hydrolysate Biostimulants remain a valuable tool in sustainable agriculture. By enhancing nutrient uptake, growth, and stress resilience, PHs help maximize crop yield and quality while promoting environmentally friendly farming practices.