Effect of Nutrient Solution Concentration in the Second Half of Growing Period on the Growth and Postharvest Quality of Leaf Lettuce L(actuca sativa L.) in a Deep Flow Technique System

2017 ◽  
Vol 35 (4) ◽  
Keyword(s):  
Nutrient Solution ◽  
Solution Concentration ◽  
Postharvest Quality ◽  
Growing Period ◽  
Deep Flow Technique ◽  
Leaf Lettuce ◽  
Technique System

scholarly journals Influence of Ecklonia maxima Extracts on Growth, Yield, and Postharvest Quality of Hydroponic Leaf Lettuce

Horticulturae ◽  
2021 ◽  
Vol 7 (11) ◽  
pp. 440
Author(s):  
Alessandro Miceli ◽  
Filippo Vetrano ◽  
Alessandra Moncada
Keyword(s):  
Cold Storage ◽  
Animal Feed ◽  
Growth Yield ◽  
Biomass Accumulation ◽  
Postharvest Quality ◽  
Mineral Nutrient ◽  
Ecklonia Maxima ◽  
Use Efficiency ◽  
Leaf Lettuce

Ecklonia maxima is a brown algae seaweed largely harvested over the last years and used to produce alginate, animal feed, fertilizers, and plant biostimulants. Their extracts are commercially available in various forms and have been applied to many crops for their growth-promoting effects which may vary according to the treated species and doses applied. The aim of the study was to characterize the effect of adding an Ecklonia maxima commercial extract (Basfoliar Kelp; 0, 1, 2, and 4 mL L−1) to the nutrient solution of a hydroponic floating system on growth, yield, and quality of leaf lettuce at harvest and during cold storage (21 days at 4 °C). The supplementation of the E. maxima extract through the mineral nutrient solutions, especially between 2 and 4 mL L−1, enhanced plant growth and improved the yield and many morphological and physiological traits (biomass accumulation, leaf expansion, stomatal conductance, water use efficiency, nitrogen use efficiency, etc.). Preharvest treatments with E. maxima extract were effective in delaying leaf senescence and extending the shelf-life of fresh-cut leaf lettuce. The delay in leaf decay of treated samples allowed to retain an overall quality over the threshold of marketability for up to 21 d of cold storage, especially using 2 mL L−1 of extract.

scholarly journals Application of Directly Brewed Compost Extract Improves Yield and Quality in Baby Leaf Lettuce Grown Hydroponically

Agronomy ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 370
Author(s):  
Almudena Giménez ◽  
Juan A. Fernández ◽  
José A. Pascual ◽  
Margarita Ros ◽  
Catalina Egea-Gilabert
Keyword(s):  
Nutrient Solution ◽  
Nitrate Content ◽  
Pythium Irregulare ◽  
Yield And Quality ◽  
Negative Effect ◽  
Floating System ◽  
Health Promoting ◽  
Leaf Lettuce ◽  
Compost Extract

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 effect 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 effect 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 that the application of directly brewed compost extract is of potential use in a sustainable soilless production system for baby leaf red lettuce, since it improves the yield and quality of the product and is able to control the incidence of P. irregulare.

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 Effects of NaCl on Hydroponic Cultivation of Reichardia picroides (L.) Roth

Agronomy ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2352
Author(s):  
Rita Maggini ◽  
Stefano Benvenuti ◽  
Federico Leoni ◽  
Luca Incrocci ◽  
Alberto Pardossi
Keyword(s):  
Nutrient Solution ◽  
Bioactive Molecules ◽  
Vegetable Crops ◽  
Market Demand ◽  
Edible Plant ◽  
Growing Period ◽  
Edible Species ◽  
Hydroponic Cultivation ◽  
Floating System

Wild edible plant species are often more tolerant to salinity than many crop plants. Considering the salinization of irrigation water that is progressively affecting the Mediterranean region and the market demand for new plant foods, the cultivation of wild edible species could represent a valid alternative to conventional vegetable crops. In this study, Reichardia picroides (L.) Roth, a widespread spontaneous herb of ethnobotanical tradition, was grown for four or six weeks under a greenhouse in a floating system for the production of baby leaves. In order to improve the nutraceutical quality of the tissues, the plants were exposed to the following NaCl concentrations in the nutrient solution: 1.7 (control), 25, 50, and 100 mM. The results showed that a 4-week growing period in a floating system with 50 mM NaCl in the nutrient solution increased the content of bioactive molecules without affecting the fresh yield. After six weeks of cultivation, despite a decrease in biomass production as compared with the control, the leaves of salt-treated plants contained higher levels of bioactive molecules along with lower amounts of nitrate ion.

scholarly journals Efficiency of nutrient solutions with different concentration in the cultivation of white cabbage seedlings

2021 ◽  
Vol 845 (1) ◽  
pp. 012051
Author(s):  
E N Blagorodova ◽  
N I Varfolomeeva ◽  
A S Zvyagina ◽  
E A Krasnoselova
Keyword(s):  
Ascorbic Acid ◽  
Root System ◽  
Leaf Area ◽  
Nutrient Solution ◽  
Solution Concentration ◽  
F1 Hybrid ◽  
Growing Period ◽  
Hybrid Plants ◽  
White Cabbage ◽  
Leaf Area Duration

Abstract Fertilizers help to fill the missing nutritional elements for plants and affect their growth and the future crop. The paper presents the results of conducted studies on the effect of nutrient solution concentration on morphological and biochemical indicators of white cabbage seedlings. The seedlings of two early-ripe cabbage hybrids – Mirror F1 and Tiara F1 – were grown in peat substrate trays. A nutrient solution of 50 ppm (No.1) and 150 ppm (No.2) was used to feed the seedlings twice during the growing period. The obtained results showed the differences in experimental variants in terms of the height of seedling plants, the number of leaves and leaf-area duration, the weight and volume of the root system, total solids, content of sugar, ascorbic acid. The varietal reaction of cabbage seedlings to the introduction of root feeds with different concentrations was revealed. The nutrient solution No. 2 of hybrid plants Mirror F1 stimulated the development of roots, their weight exceeded the control indicators (without fertilizers) by 37.3%, and the volume – by 37.8%, contributed to the increase of the content of solids (8.27%), general sugar (0.53%), ascorbic acid (78.79 mg%). When fed with nutrient solution No. 2 the seedlings of Tiara F1 hybrid were characterized by a large leaf-area duration, which exceeds the control by 1.3 times, and the indicators of the root system. The plants of this seedlings consisted of 49.5% of the root system. The chemical analysis of water in greenhouse farming for irrigation of plants showed that it contains various macro- and microelements that are necessary for the growth of vegetable seedlings. The concentration of the nutrient solution did not significantly affect the content of macroelements in the seedlings. When using nutrient solution No. 2, an increase in the plants of the two studied phosphorus hybrids was noted, a deficit of which is very often observed when growing seedlings.

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