Evaluación de dosis y frecuencias de microorganismos efectivos), en la lechuga (Lactuca sativa L.) variedad Great Lakes como bio compensadores de suelo y planta

Abstract

The research was carried out in the Experimental Farm Querochada, of the Technical University of Ambato, located in the canton of Cevallos province of Tungurahua. The geographical coordinates are: Latitude 1º 22` 20 "S. Longitude 78º 36` 22" W, at the altitude of 2 868 masl; in order to: evaluate three doses (10 ml / 10 l D1, 20 ml / 10 l D2 and 40 ml / 10 l D3) and four application frequencies (every 7 days F1, every 14 days F2, every 21 days F3 and every 28 days F4) of effective microorganisms as a soil and plant biocompensator in lettuce (Lactuca sativa L.) variety Great lakes; besides carrying out the economic analysis of the treatments.

The treatments were 12 that received microorganisms and a control which did not receive it. The variance analysis, Tukey significance tests at 5% and orthogonal polynomials with correlation calculation and regression for the application frequency factor were performed. The economic analysis of the treatments was carried out applying the cost benefit ratio (RBC) method. The application in the dose of 20 ml / 10 l (D2), produced the best results, with greater growth in plant height at the end of the trial (24.39 cm), as better growth in diameter of the cabbage (15.17 cm) ). The weight of the cabbages increased (0.77 kg); as well as the length of the root system (13.50 cm), consequently the yield of the crop was better (189.10 kg / treatment). The application of microorganisms with the frequency of every 14 days (F2), produced the best results, with greater growth in plant height (23.91 cm), better growth in diameter of the cabbage (15.27 cm), being these greater weight (0.76 kg). The length of the root system increased (14.00 cm), reporting the highest yields (187.95 kg / treatment).

From the economic analysis it is concluded that, the D2F2 treatment (20 ml / 10 l, every 14 days), reached the highest benefit-cost ratio of 1.07 where the net benefits obtained were 1.07 times what was invested, being from the point of economic view the treatment of greater profitability.