Use of autochthonous microorganism-based biol to enhance agronomic responses and nutritional value of Megathyrsus maximus for sustainable ruminant feeding.

Abstract

This study investigates the potential of biol prepared from autochthonous microorganisms (AMs) as a sustainable biofertilizer to improve the agronomic performance and nutritional value of Megathyrsus maximus under tropical conditions. Conducted in the Ecuadorian Amazon, the experiment evaluated the effects of varying biol dosages (T1, 3; T2, 4, and T3, 5 L/ha-1) on agronomic parameters such as plant height, basal cover, tiller density, and chemical composition. The results revealed significant improvements in plant growth and forage yield, particularly in the 5 L/ha-1 treatment (T3), which recorded the highest crude protein (CP) content of 12.85%. The biol treatments also increased tiller density and enhanced basal cover, indicating a favourable impact on plant development and ground cover efficiency. Chemical analysis showed that CP contents surpassed those obtained with conventional fertilizers, while neutral detergent fibre (NDF) and acid detergent fibre (ADF) contents remained consistent, ensuring the forage quality required for ruminant nutrition. Additionally, the economic evaluation showed that the biol application costs were significantly lower than those of synthetic fertilizers (192 vs. 225 $), providing a cost-effective alternative for pasture management. This research highlights the multifaceted benefits of utilizing biol derived from AMs, including improved forage productivity, enhanced nutritional quality, and reduced environmental impact. The findings emphasize the potential of biol as a viable strategy to promote sustainable agricultural practices in tropical regions, contributing to the global demand for eco-friendly alternatives to chemical fertilizers. Further research is recommended to optimize application protocols and assess long-term ecological and economic impacts.