Second crop of corn with micaxisto remineralizer in consortium with organic fertilizer
The objective of the present work was to use the mica shale remineralizer in consortium with organic fertilizer for corn culture implanted in the Brazilian Midwest region. The experiment was carried out in the second harvest of the 2020 agricultural year, at Fazenda Panamá, Municipality of Itumbiara, state of Goiás, in the no-tillage system on soybean ridge, implemented by the Center for Study and Research in Plant Science. The location presents as coordinates geographical areas, 17 ° 58 ‘S latitude and 45 ° 22’ W longitude and 554 m altitude. The agronomic characteristics “plant biometrics” evaluated were, the population of plants, performed at 30 days after germination (DAP), studies of plant biometry (aerial part) were carried out at harvest, height of insertion of the first turn, weight thousand grains and productivity in kilograms per hectare. For the evaluation of productivity, ears of 10 plants were collected from the useful area of each plot and manually threshed with the weighing of the grains of each plot, and for the weight of a thousand grains, with a standard humidity of 14%, a tray was used for thousand grain count and weighed on a precision scale. The experimental design was in randomized blocks and a single factor, and the doses of the mica shale remineralizer and organic fertilizer were in 7 T1 levels: 0.0 Kg ha-1 absolute control; T2: 4,000 Kg ha-1 mica shale + 1,000 Kg ha-1 organic fertilizer; T3: 8,000 Kg ha-1 mica shale + 1,000 Kg ha-1 organic fertilizer; T4: 12,000 Kg ha-1 mica shale + 1,000 Kg ha-1 organic fertilizer; T5: 16,000 Kg ha-1 mica shale + 1,000 Kg ha-1 organic fertilizer; T6: 20,000 Kg ha-1 mica shale + 1,000 Kg ha-1 organic fertilizer; T7: 24,000 Kg ha-1 mica shale + 1,000 Kg ha-1 organic fertilizer, with four replications. The data were analyzed using the SISVAR program. The data obtained were subjected to analysis of variance, the means being compared by the Tukey test, when significance was detected for ANOVA at p = 0.05 of probability for the comparison of means. The use of the mica shale remineralizer, together with organic fertilizer in the corn crop, proved to be highly efficient, obtaining a positive response in productivity and maintaining agronomic characteristics within ideal levels for culture.