Comparative Effects of Fungal and Bacterial Biofertilizers on Growth, Yield, and Nutritional Quality of Two Cucumber Varieties in Southwest Nigeria

This study investigates the effects of selected fungal and bacterial biofertilizers on two cucumber varieties Greengo F1 and Lily F1 under field conditions in Southwest Nigeria. A randomized complete block design was used to apply five treatments, namely Trichoderma harzianum, Penicillium menonorum, Bacillus subtilis, Rhizobacteria, and a control. Growth parameters, yield, soil physicochemical properties, microbial diversity, and fruit nutritional composition were measured. The results showed that biofertilizer application significantly enhanced growth characteristics, particularly plant height and stem girth. Rhizobium and Bacillus subtilis treatments were most effective, especially on the Lily F1 variety. Yield and fruit quality were also improved with biofertilizer use. Soil nutrient content, pH, organic matter, and microbial abundance increased, indicating enhanced soil fertility. The study concludes that microbial inoculants, particularly bacterial strains, can significantly contribute to sustainable cucumber production in nutrient-depleted soils.