Effect of different biofertilizer applications on soil health, tomato growth, and yield
摘要
Biofertilizers, including Phosphate Solubilizing Bacteria (PSB), Azotobacter, and Trichoderma, play a vital role in enhancing soil fertility, nutrient uptake, and sustainable crop productivity by improving crop yield. Continuously cultivating crops in the same field with chemical fertilizers depletes soil nutrients and degrades soil health. This study aimed to assess the effects of biofertilizer on tomato plant growth, yield, and soil nutrients. The experiment was carried out using a Randomized Complete Block Design (RCBD) with four replications. The study consisted of six treatments combinations and the treatments consisted of the following groups: T0 = control, T1 = recommended dose of chemical fertilizer (RDF), T2 = (75% RDF) + Azotobacter, T3 = (75% RDF) + PSB, T4 = (75% RDF) + PSB +Azotobacter, T5= (75% RDF) + PSB + Azotobacter + Trichoderma. The maximum growth and yield data were recorded with different significance levels (p < 0.001, p < 0.01 and 0.05) from T5 with plant height (84.67 cm), leaves per plant (56.00), leaf length (8.00 cm), branches per plant (5.56), flowers per plant (16.62), flowers cluster per plant (4.93), fruits per cluster (4.68), number of fruits per plant (25.75), individual fruit weight (54.43 g), yield per plant (1.35 kg), yield per plot (8.13 kg), and yield per hectare (81.31ton), yield increase over control 117.81%, most considerable individual fruit length of (32.95 cm), fruit diameter (32.23 cm), fresh weight (156.50 g) and dry weight of the plant (119.00 g). On the other hand, T0 showed negative results in most of the studied parameters compared to other treatments. Correlation and multivariate analyses further revealed strong positive associations at different significance levels (p < 0.001, p < 0.01, 0.05, and NS) among yield-related traits, indicating their key contribution to overall productivity. The hierarchical cluster heatmap clearly separated T5 due to its superior response across traits, while principal component analysis (PCA) explained 75.4% of the total variance, clearly differentiating biofertilizer treatments by performance. Overall, the T5 demonstrated superior values for these features in comparison to the other treatments. The findings suggest that biofertilizer with reduced chemical fertilizers can effectively enhance tomato productivity while promoting sustainable soil nutrient levels and soil health.