Effect of Biofertilizers on Growth, Yield, and Nutrient Uptake in Major Field Crops
Abstract
Biofertilizers have emerged as an environmentally sustainable alternative to chemical fertilizers for improving crop productivity, nutrient availability, and soil health. These microbial inoculants contain beneficial microorganisms such as nitrogen-fixing bacteria, phosphate-solubilizing bacteria, potassium-mobilizing microorganisms, arbuscular mycorrhizal fungi, and plant growth-promoting rhizobacteria that enhance nutrient acquisition and stimulate plant growth through natural biological processes. Increasing concerns over soil degradation, excessive chemical fertilizer use, environmental pollution, and declining nutrient-use efficiency have accelerated interest in integrating biofertilizers into sustainable crop production systems. Numerous studies have demonstrated that biofertilizers improve seed germination, root development, vegetative growth, flowering, yield attributes, and overall crop productivity while simultaneously enhancing nutrient uptake and maintaining soil fertility. Their application reduces dependence on synthetic fertilizers, lowers production costs, improves soil microbial diversity, and contributes to climate-smart agriculture by minimizing environmental impacts. The effectiveness of biofertilizers, however, depends on several factors including crop species, soil properties, climatic conditions, microbial strain compatibility, and management practices. Challenges such as inconsistent field performance, limited shelf life, poor awareness among farmers, and inadequate quality control continue to limit their widespread adoption. This paper examines the effect of biofertilizers on plant growth, crop yield, and nutrient uptake in major field crops. It further discusses their mechanisms of action, contribution to soil fertility, current adoption constraints, and future prospects for sustainable agricultural development. The study concludes that biofertilizers represent a vital component of integrated nutrient management and offer significant potential for improving agricultural productivity while conserving environmental resources.