Lamb’s lettuce mineral content in floating system

Effects of NaCl and CaCl2 as Eustress Factors on Growth, Yield, and Mineral Composition of Hydroponically Grown Valerianella locusta

“…In addition, results from Carillo et al [ 88 ] regarding the cultivation of lettuce in a floating system showed that the salinity source altered the nutrient content of Mg where the control and NaCl conditions maintained high concentrations, compared to K, which increased under KCl conditions relative to the NS concentration, and P which in turn was significantly reduced in response to CaCl 2. The values of the macronutrients presented in this study are far greater compared to a study by Gottardi et al [ 97 ] and another by Radaan et al [ 98 ], but that is ascribed mainly to the plant density in those experiments, which was 1800 and 2200 plants m −2 , respectively, and, secondly, to differences in the nutrient solution.…”

“…Due to the complexity of nutrient interactions, cultivar-related characteristics, harvest stage, plant density, and parameters related to the growing method, the outcome of the plant tissue analysis is not yet completely understood. Several studies focus on the production of baby-leaf Valerianella locusta , which presupposes a plant density of 880 plants m −2 or more [ 27 , 96 , 97 , 98 ]; since the plant density used in this study was 53 plants m −2 and the harvest stage was different (approximately 15 pairs of leaves of the control instead of 3–8), it is expected that the nutrient content might differ from that of other studies.…”

Plant Response to Mechanically-Induced Stress: A Case Study on Specialized Metabolites of Leafy Vegetables

“…AsA = (V (DKF) × F)/D × 100, (1) where V (DKF)-volume of DKF (mL); F-factor of DKF; D-sample mass used for titration. The TPC, TFC and TNFC content was determined based on the colorimetric reaction, the development of blue color within phenols and reagent Folin-Ciocalteu measured spectrophotometrically (Shimadzu, 1900i, Kyoto, Japan) at 750 nm using dH 2 O as a blank.…”

“…Consumer interest in cut leafy vegetables with distinct functional value is increasing, as is the need for a continuous supply to the market. Growing leafy vegetables in greenhouses allows them to be grown throughout the year, even in the cold months, thus ensuring the supply and availability of various leafy vegetables, especially lettuce, in the off-season [1,2]. Recently, the cultivation of leafy vegetables in greenhouses has been increasingly oriented towards hydroponic cultivation, mainly because of a number of advantages that this type of cultivation has over the conventional one: significant yield, high quality and healthy plant material, lower incidence of pathogens, less use of pesticides, less pollution, conservation of groundwater (closed hydroponic systems), high degree of automation, less physical labor, better control of water and nutrient supply to plants, fewer weeds, etc.…”

Nettle Cultivation Practices—From Open Field to Modern Hydroponics: A Case Study of Specialized Metabolites

“…The same authors state that nitrate content in leafy vegetables grown in hydroponics can be reduced by stopping fertilization a few days before harvest. Radman et al [85] also indicate the possibility of reducing nitrate content in lamb's lettuce (Valerianella locusta L.) by replacing the nutrient solution with water 3 days before harvest. However, the authors indicate that this process resulted in a lower amount of dry matter and minerals in the plant material.…”