Produção de mudas de tomateiro em diferentes substratos e recipientes em ambiente protegido

Abstract

Production of tomato seedlings in different trays and substrates under greenhouseTomato is one of the most interesting crops for the producers, due to the market acceptance and fair price. Aiming to study the tomato cultivar Santa Clara 5800 seedling production, in polystyrene trays of 72, 128, and 200 cells, and three levels of commercial organic composts (7, 14, and 21%) mixed to a local soil, an experiment was carried out in the interface region between Cerrado and Pantanal, during April, May, and June 2008. The experiment was carried out in a completely randomized factorial scheme: three container types (trays with 72, 128 and 200 cells) x and three substrates (mix of local soil with 7, 14, and 28% of commercial organic compost), with 15 replications (each seedling represented one replication). The combination between the tray of 72 cells and the substrate with 7% of organic compost was the most feasible for the growth of tomato seedlings. It took best results for the following variables: stem diameter= 0.2 cm; root length= 15.5 cm; fresh mass of the aboveground part= 0.7 g; root dry mass= 17 mg; dry mass of the aboveground part= 62 mg. Thirty three days after sowing, the seedlings, ready for transplantation, measured 6.9 cm height.

Production of tomato seedlings using different substrates and trays in three protected environments

“…Depending on the substrate, this tray did not differ from the ones with 128 cells, in this experiment (Tables 4 and 5). Evaluating the use of trays with the same cells volume, in the formation of tomato seedlings, cv Santa Clara 5800, RODRIGUES et al (2010) verified that the trays with 72 cells were more viable, this conclusion is similar to the presented here.…”

“…Thus, the seedling production requires technologies, such as new substrates and containers that provide healthy and vigorous plants for the formation of seedbeds (RODRIGUES et al, 2010).…”

Efecto de diferentes sustratos en la calidad de plántulas de berenjena (Solanum melongena L.)

“…Los demás tratamientos mostraron alturas entre 24,35 y 34,73 mm (tabla 2); ello obedece a que las plántulas cuyas raíces poseen mayor longitud aprovechan mejor las condiciones físicas y nutricionales aportadas por los sustratos, especialmente el fósforo por su papel en el crecimiento de las plántulas, ya que forma parte del ATP, responsable del almacenamiento y transporte de energía para procesos de sínte-sis de compuestos orgánicos y absorción activa de nutrientes (Oliveira y Hernández, 2008;Rodrigues et al, 2010). Aquellos sustratos asociados con la presencia de cascarilla de arroz y fibra de coco, realizan poco aporte nutricional en cuanto a nitrógeno y fósforo, para un buen desarrollo de plántulas (Sampaio et al, 2008); lo que es corroborado por Arenas et al (2002) al reportar en tomate, plántulas de menor tamaño con sustratos compuestos con un 50% de fibra de coco, en tanto que Andrade-Rodríguez et al (2008), en papaya, reportaron menor altura de plántula con este mismo sustrato, a causa de la clorosis general por la liberación de fenoles.…”

“…Se encontró una relación clara entre la longitud de las raíces, la altura de plántula, diámetro del tallo, peso fresco y seco de la parte aérea y peso fresco y seco de raíces, ya que los sustratos Ar40-Al40-L20 y Ar40-Al40-G20, lograron los mayores valores (tablas 2 y 3), lo que permite un mejor aprovechamiento del volumen del sustrato en cuanto a humedad, características físicas y químicas, reflejándose en una mejor calidad de plántula para su trasplante al sitio definitivo, hecho que coincide con los resultados reportados por Araújo et al (2010) en papaya y Rodrigues et al (2010) en tomate, quienes usaron sustratos que en su composición tenían un alto porcentaje de origen animal.…”

Spent Mushroom Compost as a Substrate for the Production of Lettuce Seedlings

“…Lettuce crops are generally initiated from seeds that have been germinated on good quality substrate contained in expanded polystyrene trays (employed to save space and minimize substrate employed), conditions that typically produce seedlings of premium standard and with high survival index (Rodrigues, Leal, Costa, Paula, & Gomes, 2010). Additionally, selection of uniform seedlings, preservation of root integrity by appropriate handling during transplantation, and an adequate supply of a suitable nutrient are essential prerequisites for the production of vigorous lettuce crops that will require minimal levels of pest control and generate superior products of high commercial value (Leal, Guerra, Peixoto, & Almeida, 2007).…”