Organic-mineral and organic fertilization in the strawberry (Fragaria x Ananasa Duch.) crop under greenhouse conditions

Abstract

A good combination of organic fertilizers and mineral fertilizers may allow a reduction in the use of agrochemicals, to benefit the environment and health of consumers, to obtained crops and safe products with lower content of chemical residues. In this paper, we assess the effect of organic fertilization and organic mineral in the cultivation of strawberries cv. Festival, in a factorial treatment designin 3x23 with 24 treatments in an experimental design in randomized blocks with four replicates under greenhouse conditions in Atlixco, Puebla. The factors and levels of study: chemical fertilization (FQ), three levels of N-P2O5-K2O 0-0-0, 45-20-20 and 90-35-35 kg ha-141 3 con un total de 24 commercial organic nutrient (Activator QF)prepared fulvic acid (AF) at a concentration of (13.58%) with two levels 0 and 450 ml ha-1,growth regulator (RC)commercial vegetable (Biozyme®, whit 78.87% of plant extracts and phytohormones, and 1.86% of microelements) at evels of 0 and 20 l ha-1 and vermicompost (V) of cattle manure at 50 and 100 g / pot. The experiment was divided into two periods from February to May and June to September 2011. The treatments applications were edafic (FQ and V) and foliar (AF and RC) in both stages of treatment applications were made at 10, 40 and 60 days after transplantation. The variables analyzed were number of stolons, stolon length, diameter and length fruit, number and weight of fruit per week, period, and the total of the two periods. Two twice a week the number of ripe fruits was counted, the diameter and length fruit and weight was measured. Every eight days after the formation of the first stolons, counted and measured. Statistical analysis was performed using the SAS program. In the period from February-May treatment FQ50-AF1-RC1-V50 showedstatistically different (Tukey, p = 0.05 %.) for variables length fruit (2.95 cm), diameter fruit (3.76 cm), weight of fruit perweek (11.31 g) and period (135.69 g). In the period from June-September FQ50-AF1-RC1-V50 present statistical differences for length fruit (2.93 cm); FQ100-AF0-RC1-V50 and FQ100-AF1-RC1-V100 showed significant differences, respectively, for the weight of fruit per week (7.8 g) and length fruit (73.84 g). FQ100-AF0-RC1-V50 achieves higher values for total fruit weight (189.42 g). In both periods, the organic-mineral fertilizer showed better results compared withorganic fertilization