This study was designed to evaluate the effectiveness of fungal biological fertilizers based on Trichoderma and Mycorrhiza in meeting the growth needs of corn. The experiment was carried out as a factorial in a completely randomized design with three treatments and five sampling times in three replications. Fertilizer treatments were applied as seed inoculation before cultivation. The morphological indices studied included plant height, number of leaves, stem length, upper leaf length, and lower leaf length. Analysis of variance of the effects of treatment and number of days before planting, as well as comparison of the trends of the effects of treatments were analyzed using JUST Version 0.19.1 software. The results showed that among the indices studied, stem diameter was significantly affected by fertilizer treatments. Mycorrhiza treatment had the highest average stem diameter compared to other treatments, and Trichoderma treatment was in second place. The difference between Mycorrhiza and Trichoderma treatments was completely significant 33 days after cultivation. The data also showed that stem diameter in Trichoderma treatment was somewhat higher than the control. These results indicate a positive effect of Mycorrhiza treatment on stem diameter index and no negative effect of Trichoderma treatment on plant growth.

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