Fertilizantes organominerais associados a cálcio em cultivo de batateira ágata

Abstract

The potato (Solanum tuberosum, L.), due to the short cycle and the high yields per area, has the fertilization as one of the main management factors. The objective was to evaluate the use of organomineral fertilizers associated or not to the source of calcium applied in the planting groove and in the ridge. The cultivar used was Agate with an experiment conducted in Cristalina-GO, in the winter harvest of 2017. The design was in DBC with 9 treatments and 3 replicates, with OrganoCa 21 fertilizers (21% Ca and 1,3% Mg) Humiflex (0.5% N, 1.6% P2O5, 1% K2O, 12% C organic humic acids 8% and fulvic 1% Aminosoil (10% N, 2% K2O, 17% organic C and 30% amino acids) ) combined with each other in the planting groove and ridge: T1- control; T2- Humiflex (planting groove); T3- Aminosoil (planting groove); T4- Humiflex (planting groove) / Humiflex + OrganoCa 21 (ridge); T5- Humiflex + OrganoCa 21 (planting groove) / Humiflex (ridge); T6- Humiflex + OrganoCa 21 (planting groove) / Humiflex (ridge); T7- Aminosoil + OrganoCa 21 (planting groove) / Aminosoil (ridge); T8- Humiflex + OrganoCa 21 (planting groove and ridge); T9- Aminosoil + OrganoCa 21 (planting groove and ridge), with recommended doses for culture. The nutritional status was evaluated through leaf analysis, tuber classification and yield. Most of the macronutrients were within the recommended range, except for K, where the values were below the ideal range, and Cu and Fe, which presented values above the ideal recommended range, the foliar micronutrients content was adequate. The treatments T3 and T6 stood out for the special class with 39.6 t ha-1. For total productivity, the T9 with 43.6 t ha-1 is added to these treatments. It is concluded that the organomineral fertilizer associated with calcium applied in the planting groove and / or in the heap generally was not efficient. The exception was the combination with Humiflex in the planting groove. Isolated organomineral fertilizers, mainly Aminosoil, are more efficient than when combined with OrganoCa 21.