Resumen:
USE OF DIFFERENT DOSES OF ATMOSPHERIC NITROGEN AND NITROGEN-FIXING BACTERIA (Methylobacterium symbioticum) IN CORN (Zea mays) IN SAN MIGUEL CHAPULTEPEC, STATE OF MEXICO.
The study was carried out in the municipality of San Miguel Chapultepec in the State of Mexico during the spring-summer cycle of 2022 under rainfed conditions, to analyze the effect of a nitrogen-fixing bacteria Methylobacterium symbioticum under different doses of nitrogen in two varieties of corn with two planting methods. The experiment was established in the field under an experimental design of complete randomized blocks with 4 repetitions, under an arrangement of subdivided plots, placing the varieties factor in the large plots, the repetitions in the medium plots, and the evaluated treatments were found in the small plots. The small plot consisted of 4 furrows 0.76 m wide and 5 m long in central rows, which corresponded to the useful experimental unit. The results found indicated that it was the interaction of the bacteria with treatment 5 (200-24-20) and the single row sowing method that expressed the greatest plant and ear height, stem thickness, as well as a greater yield. in the Pheasant variety, followed by treatment 3 (350-24-20) with the same planting method. For the Cherokee variety, treatment 3 (350-24-20) was the one that expressed the highest stem height, weight of 10 ears, as well as a higher yield with the single-row planting method, followed by treatment 1 (300-24-20). 24-20). For both varieties, the two treatments that best expressed their interaction were statistically different from the rest of the treatments. Regarding the sowing method, the interaction that best expressed the variables with the bacteria was a row in the Pheasant variety that, in interaction with the bacteria, expressed the greatest stem height, ear height, stem thickness, and the lowest presence of diseases in harvested plants and higher yields.
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