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 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 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.

Effect of irrigation based on IW/CPE ratio and sulphur levels on yield and quality of gram (Cicer arietinum L.)

2016 ◽  
Author(s):  
D. V. Srinivasulu ◽  
R. M. Solanki ◽  
M. Bhanuprakash ◽  
A. Vemaraju ◽  
P. J. Prajapati
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Irrigation Treatment ◽  
Growth Yield ◽  
Yield Attributes ◽  
Net Return ◽  
Yield And Quality ◽  
Use Efficiency ◽  
Yield Quality

A field experiment was carried out during rabi 2010-11 to study the growth, yield and quality of gram as influenced by irrigation and sulphur levels. Irrigation and sulphur have shown significant influence on growth, yield, quality, moisture extraction pattern and water use efficiency. Among four irrigation schedules, irrigation scheduled at 0.9 IW/CPE ratio recorded higher values for all the growth parameters at various stages, yield attributes, grain and stover yield, quality parameters as well as net return and BCR while, 0.7 IW/CPE ratio remained on par. Amount of moisture extracted from surface layers was more irrespective of irrigation treatment. Depletion of soil moisture increased and water use efficiency decreased with increasing frequency of irrigation. Application of 40 kg S ha-1 recorded higher grain yield, protein content and protein yield, net return and BCR and remained on par with 20 kg S ha-1. However interaction between sulphur and irrigation levels, 20 kg S ha-1 and 0.7 IW/CPE has reported higher seed yield, net returns and BCR.

Growth, Yield and Quality of Cotton under Three Water Regimes in the Sudan

1974 ◽  
Vol 10 (4) ◽  
pp. 313-318 ◽  
Author(s):  
A. H. El Nadi
Keyword(s):  
Deleterious Effect ◽  
Growth Yield ◽  
Market Value ◽  
Fibre Strength ◽  
Water Regimes ◽  
Yield And Quality ◽  
Use Efficiency ◽  
Accepted Practice ◽  
Better Than

SUMMARYThe effects of three irrigation regimes on growth, yield and quality of cotton were investigated for two seasons in relation to earliness, quality and water-use efficiency, expressed as m. of water/kg. cotton produced. Light irrigations of cotton, at 75 mm. per irrigation every ten days, were economically better than the traditionally-accepted practice of irrigating every 14 days, and markedly better than prolonging the irrigation cycle to 20 days, mainly due to increased market value of the crop. The results also showed that irrigation intervals of 20 days, besides depressing yield, had a deleterious effect on fibre strength, though the different water regimes did not seem to affect other quality tests.

INFLUENCE OF NUTRIENT SOLUTION COMPOSITION ON YIELD AND QUALITY OF SPINACH GROWN IN FLOATING SYSTEM

2009 ◽  
pp. 527-532
Author(s):  
C.M. Rivera ◽  
G. Colla ◽  
Y. Rouphael ◽  
M. Cardarelli ◽  
F. Saccardo ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Solution Composition ◽  
Yield And Quality ◽  
Floating System

scholarly journals Influence of Nutrient Solution Temperature on Its Oxygen Level and Growth, Yield and Quality of Hydroponic Cucumber

2019 ◽  
Vol 11 (3) ◽  
pp. 75 ◽  
Author(s):  
Muthir S. Al-Rawahy ◽  
Salim A. Al-Rawahy ◽  
Yaseen A. Al-Mulla ◽  
Saleem K. Nadaf
Keyword(s):  
Dissolved Oxygen ◽  
Nutrient Solution ◽  
Root Zone ◽  
Growth Yield ◽  
Solution Temperature ◽  
Oxygen Level ◽  
Root Zone Temperature ◽  
Yield And Quality ◽  
Zone Temperature

High nutrient solution temperature stress around root-zone (rhizosphere) is a major factor limiting hydroponic crop growth due to change in dissolved oxygen (DO) levels in nutrient solution during the high-temperature seasons. This suggests that easier and economical control of root-zone temperature (RZT) could be an effective solution to the temperature stress for the crop plants in hydroponics. In this respect, the present investigation was undertaken to comprehend the influence of nutrient solution temperature on its oxygen level (ambient dissolved oxygen in feeding tank), growth, yield and quality of cucumber (Cucumis sativus L.) plants. The plants were cultivated in recirculating hydroponic system in a greenhouse with dimensions of 9 m wide × 30 m long and total area of 270 m2 during three cropping periods in Oman viz. summer (June-August), fall (September-November) and spring (February-May) in two consecutive years 2016/2017 and 2017/2018. Three cooling treatments were applied viz. T1 (22 ᵒC), T2 (25 ᵒC) and T3 (28 ᵒC) through cooling nutrient solution besides non-cooled treatment T4 (33 ᵒC) as control. The plants were grown in pots filled with perlite medium in randomized complete design (RCD) with four replications. All the treatments received the same nutrient concentrations. The results showed that cooling of nutrient solution temperature influenced positively the levels of DO in the fresh nutrient solution feeding tank and drain nutrient solution for all cropping periods in both the years. Significant (p < 0.05) differences between the treatments were observed in oxygen consumption by the roots of cucumber in the cropping periods in both the years. High levels of oxygen consumptions were recorded with cooled RZTs as compared to that of control-non-cooled RZT for all cropping periods in both the years. All growth, production and quality attributes were positively influenced and greatly expressed by cooled root-zone temperature in the root-zone of cucumber with increased DO levels in nutrient solution. This study revealed that availability of optimum aeration (oxygen levels) in nutrient solution through cooling of nutrient solution temperature could be of significance for boosting cucumber yield as observed during all the growing periods especially in summer in Oman.

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