Application of directly brewed compost extract improves yield and quality in baby leaf lettuce grown hydroponically
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Giménez Martínez, Almudena; Fernández Hernández, Juan Antonio; Pascual Valero, José Antonio; Ros Muñoz, Margarita; Egea Gilabert, CatalinaÁrea de conocimiento
Producción VegetalPatrocinadores
This work was supported by projects AGL2017-84085-C3-3-R and AGL2017-84085-C3-1-R from the Ministerio de Economía y Competitividad of Spain.Fecha de publicación
2020Editorial
MDPICita bibliográfica
Giménez, A.; Fernández, J.A.; Pascual, J.A.; Ros, M.; Egea-Gilabert, C. Application of Directly Brewed Compost Extract Improves Yield and Quality in Baby Leaf Lettuce Grown Hydroponically. Agronomy 2020, 10, 370. https://doi.org/10.3390/agronomy10030370Palabras clave
Lactuca sativaPythium irregulare
Nitrate
Postharvest
Antioxidant capacity
Total phenolics
Resumen
The aim of this work was to study whether the application of a directly brewed compost extract (added in the nutrient solution or by microsprinkler) could be used to improve the yield and quality of baby leaf red lettuce growing in a floating system, and to control the incidence of Pythium irregulare. Its e_ect on the quality of fresh-cut red lettuce was also studied. For this, two experiments were carried out over two growing cycles (winter–spring and autumn). The results showed that the use of compost extract added to the nutrient solution improved baby leaf lettuce growth and quality, reducing the nitrate content and enhancing the content of potentially health-promoting compounds such as phenols and flavonoids and the antioxidant capacity. Microbial quality was maintained during storage and the compost extract had no negative e_ect on the microbial load of the final product. In addition, application of the compost decreased the population of P. irregulare in the water. It is concluded ...
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