Generally, the nutrient solution concentration did not significantly affect the fresh yield of the two cultivars tested. The mineral profile was evaluated by ion chromatography coupled with a conductivity detector, while pigments were evaluated by UV-Vis spectro-photometry. To this end, our work aimed to evaluate the productive and physiological response of two cultivars of 'Genovese' basil (Eleonora and Italiano Classico) for the industrial production of "pesto" grown for 22 days in two nutrient solutions with different electrical conductivity (1 and 2 dS m −1) and the application of two doses of protein hydrolysates (0.15-and 0.30-mL L −1 of Trainer ® in the nutrient solution). In this perspective, the use of biostim-ulants could represent a valuable and eco-friendly tool to limit the excessive use of fertilizers without a negative impact on the yield. However, the total dependence on external chemical inputs (fertilizers) makes these systems often less environmentally sustainable.
Hydroponics is a viable alternative to open field cultivation for year-round vegetable production in urban areas. Significant response in terms of aromatic profile was detected only in "Eleonora." Our results demonstrate that the application of protein hydrolysate may compensate for reduced strength nutrient solution by enhancing yield and functional quality attributes of "Genovese" basil for pesto. Biostimulant application improved crop performance and increased total phenolic concentration in both genotypes, with the highest phenolic concentration (1767.96 μg g −1 dry weight) registered at the lowest dose. "Eleonora" demonstrated higher number of leaves (37.04 leaves per plant), higher fresh yield (6576.81 g m −2), but lower polyphenol concentration (1440.81 μg g −1 dry weight) compared to "Italiano Classico." The lower EC solution (1 dS m −1) increased total phenols (+32.5%), ABTS, DPPH, and FRAP antioxidant activities by 33.2, 17.1, and 15.8%, respectively, and decreased linalool relative abundance by 5.5%. The phenolic composition, aromatic profile, and antioxidant activities (ABTS, DPPH, and FRAP) of basil were determined by UHPLC/HRMS, GC/MS, and spectrophotometry, respectively. In this perspective, our work appraised the productive and qualitative responses of two "Genovese" basil genotypes (Eleonora and Italiano Classico) grown in a floating raft system with nutrient solutions of varied electrical conductivity (EC 2 and 1 dS m −1) combined with root application of protein hydrolysate biostimulant at two dosages (0.15 and 0.3 0 ml L −1 of Trainer ®). However, the pressing need for advancing sustainability in food production dictates the reduction of chemical fertilizer inputs in such intensive production schemes through innovative cultivation practices. The floating raft constitutes a valuable system for growing herbs as it effectuates high yield and prime functional quality.
Conversa caipira full#
However, the concentration of chlorophyll and nitrogen show different trends and were higher in full strength of nutrient solution with EC = 2 dS m−1. These EC values are lower than the recommended EC value given as the optimum in the previous studies. According to the results, the basil and lettuce growth parameters among the five treatments have been significantly higher in the treatment with EC of 1.2 and 0.9 dS m−1. We studied the effects on several growth parameters (including the dry and fresh weight of leaves and roots, number of leaves, and leaf area) as well as the chlorophyll and nitrogen concentration of the leaves.
Each treatment was replicated four times. The experiment was done in automatic vertical farms using the hydroponic ebb–flow cultivation technique with a temperature of 20 ± 1 ☌, relative humidity of 50–60%, CO2 concentration of 450 ppm, pH = 6, the PPFD (photosynthetic photon flux density) of 215 ± 5.5 μmol m−2 s−1, and the photoperiod of 16:8 h (day/night). During the study, the environmental parameters were kept fixed using an automatic dosing machine. In this study, we investigated the effect of five EC levels (2, 1.2, 0.9, 0.7, and 0.5 dS m−1) of Hoagland nutrient solution on the growth and development of basil cultivar ‘Emily’ and lettuce cultivar ‘Batavia-Caipira’. Studying the optimal EC is important for avoiding nutrient loss and deficiency in vertical farms. One of the important factors in vertical farming for the cultivation of different plants is the amount of nutrients, which can be measured as electrical conductivity (EC). Vertical farms use engineered growth environments and hydroponic cultivation techniques for growing plants indoors.
During the past few decades, vertical farming has attracted a lot of interest as an alternative food production method.
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