Avaliação de adubo orgânico, organomineral e químico na cultura do milho

Abstract

Fertilization is of great importance in corn cultivation and seeking new technologies to achieve high production where at a lower cost makes all the difference, so this work shows the yield using other forms of fertilization in corn with the use of organic fertilizer, associated organomineral or isolated with chemical fertilizer. The design used was randomized blocks with four replications. The treatments were T1:3 Mg ha-¹ of organic fertilizer; T2: 2 Mgha-¹ organic fertilizer + 200 kg ha-1 chemical 10-15-15; T3: 2 Mg ha-¹ organic fertilizer + 300 kg ha-1 chemical fertilizer 10-15-15; T4: 2 Mg ha-¹ of organomineral fertilizer; T5: 1.5 Mgha-¹ organomineral + 200 kg ha 10-15-15; T6: 1.5 Mgha-¹ of organomineral fertilizer + 300 kg of chemical fertilizer 10-15-15; T7: 3 Mg ha-¹ organic compound; T8: 300 kg ha-1 10-15-15. The initial stands were evaluated: Plant height, stalk diameter, ear diameter, and ear length. At the harvest point, the number of grains per ear, grain productivity, mass of 1000 grains was harvested and evaluated. It is concluded that organic fertilizer with three tons per hectare has the lowest productivity; Organomineral fertilizer alone or associated with NPK fertilizer formulated 10-15-15 can replace chemical fertilizer without loss of corn grain productivity.