Abstract
The production of seedlings for transplanting is one of the most important stage to successful lettuce cultivation. Among the techniques practiced to obtain seedlings of vegetables, stands out using agricultural substrates associated with the cultivation trays. The experimental setup design was in completely randomized with 5 treatments and 6 repetitions.The experiment was carried out in a greenhouse, where were evaluated five commercial substrates (TropstratoHT®, Vivatto Slim Plus®, Tecnomax® , Holambra HS® and Bianchi Power) for the development of lettuce seedlings cv. Lucy Brown. Analyzes were performed to quantify the physical and chemical characteristics of the substrate. It was evaluated Fresh mass of shoots and roots, total fresh mass, dry mass of shoots and roots, total dry mass, stalk diameter, leaf area and leaf number. The results showed that among evaluated substrates, Bianchi Power ® showed be more efficient to seedling lettuce production by influence on the growth and development
Highlights
IntroductionLettuce (Lactuca sativa L.) is the most popular of leafy vegetables and your growth is distributed in almost every region of the globe (Gomes, 2001; Resende et al, 2003)
The results showed that among evaluated substrates, Bianchi Power ® showed be more efficient to seedling lettuce production by influence on the growth and development
Lettuce (Lactuca sativa L.) is the most popular of leafy vegetables and your growth is distributed in almost every region of the globe (Gomes, 2001; Resende et al, 2003)
Summary
Lettuce (Lactuca sativa L.) is the most popular of leafy vegetables and your growth is distributed in almost every region of the globe (Gomes, 2001; Resende et al, 2003). Lettuce is considered a very important leafy vegetable in the diet of Brazilians and with significant economic importance by producers. The cultivation of this species is concentrated largely in green belts, near the capitals and in typically warm regions, being planted through both family farming and large vegetable producers (Caetano, 2013). Prior to the development of the crop in the field, the production of lettuce seedlings is an important step because influences the growth and development aspects during the production process. In the chain production of quality vegetables, seedling formation is one of the most important phases for the crop cycle, directly influencing the final performance of the plant, both from the nutritional and productive point of view. Silva Jr. & Visconti (1991) described that a good substrate should have good nutrient and moisture retention capacity, good aeration, low root penetration resistance and good loss of structure resistance, since it is used at a developmental stage, where the plants are susceptible to attack by microorganisms and less tolerant to water deficit
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