Evaluación de sustratos orgánicos a base de subproductos agrícolas en la germinación de semillas de lechuga (Lactuca sativa) variedad General

Abstract

An agronomic evaluation of the feasibility of the production of vegetable seedbeds such as lettuce (Lactuca sativa) General variety was carried out, implanted in different substrates obtained from compost as a technological process for its production, the work was developed under greenhouse conditions. he composting phase was carried out on wooden crates, obtaining a total volume of 0.012 m3 per treatment, of which a volume of 0.009 m3 was used. The experimental design used contemplated a completely randomized block design and the ADEVA analysis of variance was applied, evaluating the characteristics of the substrates obtained with each biowaste and their effect on the dependent variables. Variables of germination vigor, plant development and quality of the substrates used were evaluated from bioresidues from the agricultural production of potatoes, corn and tree tomatoes in the province of Tungurahua. The substrates that allowed the best development of the plants in the lettuce crops were the mixture of potato residues plus a commercial substrate based on coconut fiber, with a vigorous plant development. The fact that the obtained substrates showed a C/N ratio close to or equal to the 20-25 range is highlighted, which predicts the fact that the influence exerted by the initial C/N ratio on the composting process and the action of the microorganisms obtained in the substrate. The seeds prepared with the best treatment germinated more quickly, presenting a larger seedling size, in addition to their growth being more vigorous, and their roots deployed more vigorously.