Evaluación de parámetros de crecimiento en piña “cabezona” (Ananas comosus (L.) Merr.) en respuesta a la fertilización NPK

Objective: to evaluate the effect of NPK fertilization on the accumulation of dry biomass, NDVI, LAI and yield of the Cabezona pineapple (Ananas comosus (L.) Merr.) Design / Methodology / Approach: the experimental design was a randomized complete block with four replications, 14 treatments and one control. The treatments were generated with the Plan Puebla I matrix; N doses were,120, 160, 200 and 240 kg ha-1, of P were 70, 110,150 and 190 kg ha-1, and for K 150, 200, 250 and 300 kg ha-1. The N and P doses were divided into four applications, at two, five, eight, and thirteen months. P was applied in a single exhibition at the beginning of the culture cycle. Results: at the end of the cultivation cycle, all the treatments accumulated a greater quantity of biomass than the control, but no statistical difference was found between fertilization treatments. The NDVI showed no trend during the crop cycle and it was not correlated with biomass, LAI or yield. In Leaf area index (LAI) did not show statistical difference between treatments and control. In yield, a highly significant difference was observed between treatments, being treatments 5 (200-110-250) and 8 (200-150-250) where yields greater than 55 t ha-1 were obtained. Study limitations / implications. Cabezona pineapple susceptibility to mealybug attack may affect yield observations Findings / Conclusions: The Cabezona Pineapple accumulated on average 0.80 ± 0.13 g of dry biomass per day. under environmental conditions of the Huimanguillo, Tabasco, savanna. Not relationship was found between NDVI and biomass accumulation in this crop. LAI increases dramatically after flower induction treatment. Fertilization dose recomended 200-110-250, since produced a yiel of 55.5 t ha-1 of fresh fruit, and it is cheaper than others dose tested.