Objetivou-se com o presente trabalho avaliar diferentes concentrações de sais na solução nutritiva proposta por Furlani (1999) em cultivo hidropônico de rúcula no sistema deep film techinique (DFT) em ambiente protegido. O delineamento utilizado foi inteiramente casualizado (DIC) com quatro repetições, sendo os tratamentos cinco concentrações de sais: 33%, 67%, 100%, 133% e 167% em relação a concentração original com adaptação do nutriente cobre na concentração 0,064 mg L -1 . As mudas foram conduzidas durante 30 dias em sistema hidropônico (DFT). Os resultados mostraram que o incremento de sais a partir da dose de 67% não apresentou ganhos significativos em massa seca. Os resultados também não apresentaram resultados significativos em teores foliares, que em concentrações altas apresentaram interação negativa entre alguns nutrientes. Para o acúmulo dos nutrientes nitrogênio, fosforo e potássio e composição centesimal nenhuma concentração de sais acima de 100% propiciou aumento efetivo que justificasse o aumento do custo inerente ao aumento dos sais na solução. O cultivo de rúcula apresenta melhor desenvolvimento com concentrações de sais entre 67 e 100 %. Palavras-chave: Solução Nutriva. Floating. Eruca sativa. Brássica. Rendimento nutricional.
The use of alternative culture media for the in vitro cultivation of plants is being increasingly used to meet nutritional needs, reducing production costs. In this context, the present work aimed to evaluate the influence of the concentrations of salts of the MS culture medium and of the chia extract on the in vitro growth of seedlings of Shamburquia crispa Lindley. The experimental design used was completely randomized - DIC, in a 5x5 factorial scheme, with the treatments being composed of different concentrations of salts of the MS culture medium (0, 25, 50, 75 and 100%) and concentrations of chia extract ( 0, 3.5, 7.0, 10.5 and 14.0 g L-1), with four replications and four seedlings per plot. The data were submitted to analysis of variance and, to compare the treatment means, the Scott Knott test was performed at 5% significance. All analyzes were performed with the aid of the SISVAR 5.3 program. After 90 days of installation, the following were analyzed: survival rate (%), number of leaves, number of roots, length of the largest root and length of the aerial part. The reduction in salts of the MS culture medium (0, 25 and 50%) associated with the addition of chia extract (10.5 and 14 g L-1) promotes greater growth and development of Schomburgkia crispa Lindley explants grown in vitro.
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