scholarly journals Effect of Nitrogen and Ccalcium Concentration in Nutrient Solution on Growth, Yield and Tipburn of Butterhead Lettuce in Floating System

2019 ◽  
Vol 10 (3) ◽  
Keyword(s):  
Nutrient Solution ◽  
Growth Yield ◽  
Floating System ◽  
Butterhead Lettuce

scholarly journals Effect of Gibberellic Acid on Growth, Yield, and Quality of Leaf Lettuce and Rocket Grown in a Floating System

Agronomy ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 382 ◽  
Author(s):  
Alessandro Miceli ◽  
Alessandra Moncada ◽  
Leo Sabatino ◽  
Filippo Vetrano
Keyword(s):  
Gibberellic Acid ◽  
Nutrient Solution ◽  
Production Systems ◽  
Growth Yield ◽  
Mineral Nutrient ◽  
Yield And Quality ◽  
Floating System ◽  
Use Efficiency ◽  
Leaf Lettuce

Gibberellins (GAs) are growth hormones strongly involved in a wide variety of physiological activities. Currently, gibberellins are commercially used to enhance phenotypic characteristics, earliness, and productivity of many vegetable and ornamental crops. In this work, the efficacy of supplementation of low levels of gibberellic acid (0, 10−8, 10−6, and 10−4 M GA3) through the mineral nutrient solution of a floating system on yield and quality of leaf lettuce and rocket plants was tested. The marketability of plants was lost when 10−4 M GA3 was added to the mineral nutrient solution. This study demonstrated that the addition of 10−4 M GA3 exceeded the acceptable threshold for use in hydroponics production systems. Below the concentration of 10−4 M, the presence of GA3 in the mineral nutrient solutions (MNS), especially at 10−6 M GA3, stimulated plant growth and enhanced the yield. Various morphological and physiological traits were enhanced by GA3 treatments (biomass accumulation, leaf expansion, stomatal conductance, water use efficiency (WUE), Nitrogen use efficiency (NUE), etc.), with superimposable trends in both lettuce and rocket. The addition of 10−6 M GA3 to the nutrient solution of a hydroponic floating system can promote growth and quality of lettuce and rocket plants.

scholarly journals Effect of Molybdenum Rate on Yield and Quality of Lettuce, Escarole, and Curly Endive Grown in a Floating System

Agronomy ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 171 ◽  
Author(s):  
Alessandra Moncada ◽  
Alessandro Miceli ◽  
Leo Sabatino ◽  
Giovanni Iapichino ◽  
Fabio D’Anna ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Nutritional Quality ◽  
Growth Yield ◽  
Leafy Vegetables ◽  
Morphological Alteration ◽  
Nitrate Content ◽  
Yield And Quality ◽  
Floating System ◽  
Four Levels

Molybdenum (Mo) is required in enzymes involved in a number of different metabolic processes, and is crucial for the survival of plants and animals. The influence of nutrient solutions containing four levels of molybdenum (0, 0.5, 1.5, and 3.0 µmol/L) on growth, yield, and quality of lettuce, escarole, and curly endive grown in a hydroponic floating system was evaluated. Biometric, nutrient, and quality analyses were conducted to assess the response of each species to Mo. The results demonstrated that molybdenum is essential for harvesting marketable plants. Lettuce, escarole, and curly endive plants differed significantly in their response to molybdenum fertilization. The increase of Mo concentration in the nutrient solution was not harmful for plants and had no influence on yield and morphological traits of the leafy vegetables; however, it significantly affected some quality characteristics. Mo fertilization raised the nutritional quality by increasing ascorbic acid content up to 320.2, 139.0, and 102.1 mg kg−1 FW (fresh weight), and reducing nitrate content down to 1039.2, 1047.3, and 1181.2 mg kg−1 FW for lettuce, escarole, and curly endive, respectively. The addition of Mo in the nutrient solution increased the Mo content of plants up to 0.50, 4.02, and 2.68 μg g−1 FW for lettuce, escarole, and curly endive, respectively. Increasing Mo supply to lettuce, escarole, and curly endive up to 3.0 µmol L−1 could lead to a higher nutritional quality with no significant morphological alteration or yield loss.

scholarly journals Effect of Reduced Nitrogen and Supplemented Amino Acids Nutrient Solution on the Nutritional Quality of Baby Green and Red Lettuce Grown in a Floating System

Agronomy ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 922 ◽  
Author(s):  
Pavlos Tsouvaltzis ◽  
Dimitrios S. Kasampalis ◽  
Danai-Christina Aktsoglou ◽  
Nikolaos Barbayiannis ◽  
Anastasios S. Siomos
Keyword(s):  
Amino Acids ◽  
Nutrient Solution ◽  
Nutritional Quality ◽  
Mineral Nitrogen ◽  
Leafy Vegetables ◽  
Nitrate Accumulation ◽  
Nitrogen Reduction ◽  
Soluble Solid ◽  
Floating System

Excessive nitrogen fertilization results in nitrate accumulation in leafy vegetables. Reducing the dose of mineral nitrogen or using alternate fertilizers lowers the nitrate accumulation; however, a critical minimum level of mineral nitrogen is necessary to maintain yield and nutritional quality. The aim of this study was to evaluate the effect of two levels of mineral nitrogen (100% and 50%) and three levels of an amino acid solution (0, 0.3, and 0.9%) in the nutrient solution of two baby lettuce cultivars (green and red) grown in a floating system. Nitrogen reduction did not affect yield (12.9–13.4 and 11.0–11.3 g/plant, respectively) but reduced nitrate accumulation (by 43 and 19%, respectively) in both green and red lettuce, while enhancing phenolic content (by 28%) and antioxidant capacity (by 69%) in green lettuce and soluble solid (by 7%) and total chlorophyll content (by 9%) in red lettuce. Although nitrate accumulation was prevented (< 355 mg/kg FW) and most nutritional components increased in both lettuce types by amino acids supplementation, plant growth was negatively affected, especially in red lettuce, in both concentrations of amino acids (reduction by 9 and 35% in 0.3 and 0.9%, respectively). In both lettuce types, proline content increased by 0.9% amino acids supplementation (by 45%), implying a probable induction of a stress condition. Mineral nutrients were slightly affected by nitrogen reduction, which was probably perceived as an abiotic stress.

EFFECT OF THE REDUCTION OF NUTRIENT SOLUTION CONCENTRATION ON LEAFY VEGETABLES QUALITY GROWN IN FLOATING SYSTEM

2008 ◽  
pp. 1167-1176 ◽  
Author(s):  
A. Alberici ◽  
E. Quattrini ◽  
M. Penati ◽  
L. Martinetti ◽  
P. Marino Gallina ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Solution Concentration ◽  
Leafy Vegetables ◽  
Floating System

Impact of reduced potassium nitrate concentrations in nutrient solution on the growth, yield and fruit quality of melon in hydroponics

2013 ◽  
Vol 164 ◽  
pp. 221-231 ◽  
Author(s):  
Toshiki Asao ◽  
Md. Asaduzzaman ◽  
Md. Fuad Mondal ◽  
Mayumi Tokura ◽  
Fumihiko Adachi ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Fruit Quality ◽  
Growth Yield ◽  
Potassium Nitrate ◽  
Nitrate Concentrations

EFFECT OF NUTRIENT SOLUTION CONCENTRATION ON QUALITY OF RADISH (RAPHANUS SATIVUS L.) GROWN ON A FLOATING SYSTEM

2007 ◽  
pp. 297-302 ◽  
Author(s):  
A. Salerno ◽  
F. Pierandrei ◽  
S. Rinaldi ◽  
P. Sequi ◽  
E. Rea ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Raphanus Sativus ◽  
Solution Concentration ◽  
Raphanus Sativus L ◽  
Floating System

scholarly journals Farklı Besin Solüsyonlarının Yüzen Su Kültüründe Rokanın Verim ve Kalite Özelliklerine Etkileri

2019 ◽  
Vol 7 (2) ◽  
pp. 258
Author(s):  
Golgen Bahar Oztekin ◽  
Tuğba Uludağ ◽  
Yüksel Tüzel ◽  
Mahmut Tepecik
Keyword(s):  
Plant Growth ◽  
Vitamin C ◽  
Nutrient Solution ◽  
Growth Yield ◽  
Nitrate Content ◽  
Water Culture ◽  
Full Dose ◽  
Macro Elements ◽  
Yield And Quality ◽  
Half Dose

This study was conducted in styrofoam trays placed on an aerated nutrient solution in vats in order to determine the effect of different nutrient solutions on rocket plant growth, yield and quality. Seeds of Bengi F1 rocket cultivar were sown into peat as inserting each seed to each hole (17 ccs) of trays with 210 cells (957 plant m-2). Following germination in the germination chamber, seedling trays were moved to a climate controlled greenhouse for adaptation. After emergence, the seedlings were transferred to water culture. The nutrient solution was applied as “full dose” (mg/L: N 150, P 50, K 150, Ca 150, Mg 50, Fe 5.0, Mn 0.50, Zn 0.05, B 0.50, Cu 0.03, Mo 0.02), “half dose” (macro elements reduced by 50%) and “without nutrients” (water). Cultivation was performed in 2 consecutive periods and in each period 3 harvests were done and quality analysis was done on the leaves from the first harvest. Results were given as the mean of two periods. Results showed that plant growth, yield and quality parameters vary depending on the concentration of the nutrient solution. It was observed that as the concentration of nutrient solution decreased, plant growth, biomass, yield values decreased, leaf color and total chlorophyll concentration did not change and while nitrate content decreased, vitamin C content increased. Leaf N, P, K and Fe element contents decreased with half dose, whereas Ca and Mg content did not change. However, there was no statistical difference between full dose and half dose treatments in many measured parameters. When all the data obtained from the study are evaluated together; it is suggested that rocket can be grown in a floating water culture and the dose of macro elements as reduced 50% can be preferred because it reduces the nitrate content, increases the vitamin C content and allows the use of less fertilizers without causing any significant reduction in yield compared with full dose.

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