Evaluación de sustratos y ácido salicílico en la producción de plántulas de brócoli (Brassica oleracea Var. Itálica)

Abstract

The cultivation of broccoli in the last decades has had a growth in both the national and international market, so it is important to have seedlings that meet good adaptability for transplanting, growth and development to supply the supply and quality of the market. The objective of this research is to evaluate various substrates together with different concentrations of salicylic acid for the production of broccoli (Brassica oleracea Var. Italica) seedlings. The present trial was carried out in the parish of Belisario Quevedo, in the canton of Latacunga, Cotopaxi province. An experimental design was carried out using completely randomized blocks (DBCA) with a factorial arrangement of 3*3+1 with three replications (nine treatments and a control). The substrates used were S1(Floragard), S2(Klasmann TS1, S3(BM2) and the dosage of salicylic acid was D1(1cc/L), D2(2cc/L) and D3(3cc/L), while T(control) consisted of humus and without AS applications. The data were analyzed using the Tukey test at 5% with a comparison of means between treatments. The application was made at 7 and 14 days after sowing, while data were collected 30 days after sowing. Germination percentage, root volume and length, number of leaves, stem diameter and total chlorophyll were evaluated. Based on the statistical analysis, it was determined that in four variables the S1D1 treatment (floragard substrate and salicylic acid at a dose of 1cc/L) predominated, where root volume obtained an average of 1.64cc, root length 8.73 cm, stem diameter 1.49 cm and total chlorophyll 4.62 μg/g. While in the variable number of leaves the treatment that stood out was S1D2 (floragard substrate and salicylic acid at a dose of 2cc/L) which had more leaf area compared to the other treatments with an average of 2.53 leaves. On the other hand, the S2D2 treatment (klasmann TS1 substrate and a salicylic acid dose of 2cc/L) obtained a high germination percentage with a mean of 98.54%.