Summary of Using Microgranular-Based Biostimulant in Vegetable Transplant Production to Enhance Growth and Nitrogen Uptake
Biostimulants Enhance Vegetable Transplant growth and quality, offering vegetable growers an effective way to improve crop success. High-quality transplants are essential for optimal yield, and recent studies show that protein hydrolysates (PH) and the beneficial fungus Trichoderma atroviride significantly improve plant health. However, the best rates and methods to maximize these benefits were not fully known.
Optimal Biostimulant Rates for Vegetable Transplants
The research aimed to determine the best use of a microgranular-based biostimulant containing vegetal-derived PH and T. atroviride MUCL45632 for lettuce and tomato transplants. Experiment 1 showed that mixing microgranular PH into the substrate before sowing increased shoot fresh and dry biomass, root dry weight, root-to-shoot ratio, leaf nitrogen content, and chlorophyll levels. The most effective rate was 2 g L−1.
Synergistic Effects of PH and Trichoderma
Subsequent experiments tested combining T. atroviride with PH in liquid or microgranular form. Liquid PH combined with Trichoderma improved shoot fresh biomass more effectively. In contrast, microgranular PH with Trichoderma promoted better root-to-shoot ratios.
Long-Term Soil and Microbial Benefits
Laboratory studies confirmed that PH applied to sandy soil enhanced Trichoderma colony growth and respiration for several days, demonstrating a lasting effect on soil microbiology.
Practical Recommendations for Growers
Overall, biostimulants enhance vegetable transplant growth by improving root and shoot development, nitrogen uptake, and chlorophyll content. Mixing microgranules containing PH and T. atroviride at 2 g L−1 into the substrate before sowing is the most effective method. These findings offer clear guidance for growers seeking sustainable strategies to produce vigorous lettuce and tomato transplants and optimize crop performance.
Publication: Agronomy
