scholarly journals Nutrient solution aeration and growing cycles affect quality and yield of fresh-cut baby leaf red lettuce

2015 ◽  
Vol 24 (4) ◽  
Author(s):  
Encarnación Conesa ◽  
Juan A. Fernández ◽  
Diana Niñirola ◽  
Catalina Egea-Gilabert
Keyword(s):  
Vitamin C ◽  
Antioxidant Capacity ◽  
Nutrient Solution ◽  
Storage Time ◽  
Quality Parameters ◽  
Root Diameter ◽  
Nitrate Content ◽  
Floating System ◽  
Fresh Cut ◽  
And Storage

The objective of this research was to study the effects of nutrient solution aeration [no aeration (NA), low aeration (LA) or high aeration (HA)] and growing cycle (autumn, winter and summer) on the yield, quality, and shelf life of red lettuce as a fresh-cut product grown in a floating system. The specific leaf area, yield and root diameter were affected by the growing cycle. The percentage of dry matter and the nitrate content were affected by growing cycle and aeration, total phenolics and mesophilic microorganism by aeration and storage time, hue angle and chromacity by growing cycle and storage time, and antioxidant capacity, vitamin C, lightness and psychrophilic microorganisms were affected by all three factors. NA conditions increased the antioxidant capacity in summer and vitamin C content in winter. The lowest mesophilic and psychrophilic count was observed in autumn. The effect of aeration on most of the quality parameters measured was influenced by the growing cycle.

scholarly journals Combined Effects of Growth Cycle and Different Levels of Aeration in Nutrient Solution on Productivity, Quality, and Shelf Life of Watercress (Nasturtium officinale R. Br.) Plants

HortScience ◽  
2014 ◽  
Vol 49 (5) ◽  
pp. 567-573 ◽  
Author(s):  
Diana Niñirola ◽  
Juan A. Fernández ◽  
Encarnación Conesa ◽  
Juan A. Martínez ◽  
Catalina Egea-Gilabert
Keyword(s):  
Vitamin C ◽  
Antioxidant Capacity ◽  
Shelf Life ◽  
Nutrient Solution ◽  
Storage Time ◽  
Oxygen Depletion ◽  
Growth Cycle ◽  
Root Diameter ◽  
Nitrate Content ◽  
And Storage

The objective of this research was to study the effects of growing cycle (spring vs. winter) and nutrient solution aeration [no aeration (NA), low aeration (LA) or high aeration (HA)] on yield, quality, and on shelf life as a fresh-cut product of watercress grown in a floating system. The growing cycles lasted 25 days in spring and 39 days in winter. In the spring cycle, the plants had significantly higher yield and antioxidant capacity and lower specific leaf area, total root length, root diameter, length of 0 to 0.5 mm diameter root, and oxalate content than in the winter cycle. The absence of aeration increased the antioxidant capacity and vitamin C content in both cycles. Several adventitious roots developed exogenously from the watercress stem at the nodes as a morphological adaptation to oxygen depletion, particularly in NA conditions. The nitrate, oxalate, Ca2+, K+ contents, and microbial populations were affected by both the cycle and the aeration conditions. Hue angle of the leaves was affected by both the cycle and storage time, and chromaticity and lightness were affected by the three factors (cycle, aeration, and storage time). The global quality was significantly higher (7.8 over 9 points hedonic scale) in the spring cycle than in winter, the score reflecting their marketable value (7.0 over 9 points). The mild dehydration problems observed in the winter cycle that led to a slightly lower overall product quality that could be the result of the development of thinner leaves and also the differences in the respiration rates compared with the spring cycle. In general, the spring cycle led to higher productivity, antioxidant capacity, and Ca2+ and K+ contents and lower oxalate content. Aeration slightly affected the quality of the final product, the plants grown in non-aerated conditions being richer in vitamin C and antioxidants and with lower nitrate content.

scholarly journals A Research on Production of Rocket and Parsley in Floating System

2016 ◽  
Vol 8 (7) ◽  
pp. 54 ◽  
Author(s):  
Hale Duyar ◽  
Cenk Ceyhun Kiliç
Keyword(s):  
Vitamin C ◽  
Nutrient Solution ◽  
Negative Impact ◽  
Total Yield ◽  
Dry Weight ◽  
Nutrient Content ◽  
Quality Parameters ◽  
Control Treatment ◽  
Production Cycle ◽  
Floating System

<p>In this research, the possibility of the production of rocket and parsley which have short production cycle and baby leaf vegetable, in floating system to reduce the concentration of nutrient solution; determination of the effects of yield, quality and leaf nutrient content was aimed. Research was carried out during the autumn and spring production seasons of 2010-2011. Standard nutrient solution ((mM) 12 N-NO<sub>3</sub>, 3.8 N-NH<sub>4</sub>, 2.8 P, 8.4 K, 3.5 Ca, 1.4 Mg, 9.5 Na, 8.0 Cl, 2.7 S, 0.04 Fe) was used as full dose (control treatment) and compared to half dose (1/2 dose) Hoagland nutrient solution. Both of the seasons in total yield were changed between rocket 975.81-1612.15 g m<sup>-2 </sup>and parsley 875.50-1093.50 g m<sup>-2 </sup>respectively. The results showed that using of floating system in Rocket and Parsley cultivation was successful and reduced the concentration of nutrient solution; variety and growing season at rates ranging from 13.7% to 24.8% compared to have showed reduce the yield. In this study, the effect of treatments to some quality parameters (dry weight, vitamin C, nitrate, pH ve EC) and nutrients removed by plant were determined. In addition, it was found that these values increased with increasing with the concentration of nutrient solution; however, vitamin C decreased in Parsley cultivation. When the results evaluated as a whole, it was concluded that using ½ doses decreased yield, some savings could be achieved in terms of nutrient solution consumed by the plant with the negative impact on the environment.</p>

scholarly journals Nutrient Solution Deprivation as a Tool to Improve Hydroponics Sustainability: Yield, Physiological, and Qualitative Response of Lettuce

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1469
Author(s):  
Michele Ciriello ◽  
Luigi Formisano ◽  
Antonio Pannico ◽  
Christophe El-Nakhel ◽  
Giancarlo Fascella ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Potential Effect ◽  
Quality Parameters ◽  
Leafy Vegetables ◽  
Nitrate Content ◽  
Yield Reduction ◽  
Quality Performance ◽  
Floating Raft ◽  
Amino Acids Profile ◽  
Excessive Nutrients

Hydroponics growing systems often contain excessive nutrients (especially nitrates), which could lead to a quality loss in ready-to-eat leafy vegetables and posing a health risk to consumers, if managed inadequately. A floating raft system was adopted to assay the production and quality performance of lettuce (Lactuca sativa L. cv ‘Maravilla De Verano Canasta’) deprived of the nutrient solution by replacement with only water, three and six days before harvest. Yield and quality parameters, mineral composition, pigments, organic acids, amino acids profile, soluble proteins, and carbohydrate content were determined. Nutrient solution deprivation six days before harvest resulted in a significant reduction in leaf nitrate (−53.3%) concomitant with 13.8% of yield loss, while plants deprived of nutrient solution three days before harvest increased total phenols content (32.5%) and total ascorbic acid (102.1%), antioxidant activity (82.7%), anthocyanins (7.9%), sucrose (38.9%), starch (19.5%), and γ-aminobutyric acid (GABA; 28.2%), with a yield reduction of 4.7%, compared to the control. Our results suggest that nutrient solution deprivation three days before harvest is a successful strategy to reduce nitrate content and increase the nutritional quality of lettuce grown in floating raft systems with negligible impact on yield. These promising results warrant further investigation of the potential effect of nutrient solution deprivation on the quality attributes of other leafy vegetables cultivated in floating raft systems and in a “cascade” growing system.

Effects of Gibberellins Treatment on Storage Quality and Nutrition Components of Loquat

2011 ◽  
Vol 108 ◽  
pp. 244-250
Author(s):  
Wei Dong Bai ◽  
Wen Hong Zhao ◽  
Zhou Min Lu ◽  
Xue Dan Cao ◽  
Zhong Liang Zhang
Keyword(s):  
Vitamin C ◽  
Storage Time ◽  
Theoretical Foundation ◽  
Soluble Sugar ◽  
Soluble Solids ◽  
Storage Quality ◽  
Titrable Acidity ◽  
And Storage ◽  
Weight Loss Ratio

In order to study the effects of Gibberellins (GA3) treatment on fresh-keeping effect and storage quality, provide theoretical foundation for loquat production, the loquat fruit grown in Guangdong Province were separated in groups and dipped in different concentrations (10, 50, 100 μmol/L) of GA3 solution respectively for 20 min, and then stored at a chamber with temperature of 3±0.5°C, relative humidity of 65~80%. The rotten index, flesh hardness, weight-loss ratio, contents of total soluble solids, soluble sugar, titrable acidity and vitamin C were measured periodically. The results show that by GA3 treatment ,the rotten index and flesh firmness of loquat fruit decrease significantly, and storage time of loquat lengthen effectively. It also indicate the content of titrable acidity can be greatly reserved to some extent by 10 μmol/L GA3 treatment, and the loss of vitamin C content drop highly, generating better flavor and quality of loquat fruit.

scholarly journals Analysis of Vitamin C Content of Red Dragon Fruit (Hylocereus polyrhizuz) and White Dragon Fruit (Hylocereus undatus) in Storage with Different Temperatures and Times

2018 ◽  
Vol 5 (2) ◽  
pp. 249
Author(s):  
N. Putri Sumaryani ◽  
Anak Agung Istri Mirah Dharmadewi
Keyword(s):  
Vitamin C ◽  
Storage Time ◽  
Temperature Treatment ◽  
Randomized Design ◽  
Dragon Fruit ◽  
Different Temperatures ◽  
Completely Randomized Design ◽  
The Difference ◽  
Hylocereus Undatus ◽  
And Storage

This study was conducted to determine the temperature and storage time of the exact vitamin C content of red and white dragon fruit and the difference of vitamin C. The samples were taken from the plantation land in Ubud Andong Highway, Petulu, Gianyar Regency. Treated for 10 and 30 days with 2, 10, 20 and 300C temperature treatment with five repetitions using Completely Randomized Design Factorial pattern. Data obtained statistically using ANOVA (Analysis of Variance). The highest vitamin C content in red dragon fruit is 29.61 mg/ 100g temperature 100C for 10 days and the lowest is in 30 days storage with temperature 300C that is equal to 22,09 mg/ 100g. While the white dragon fruit content of vitamin C highest contained in storage with a temperature of 20C is 22.69 mg/ 100g with maximum storage of 10 days and the lowest at a temperature of 300C is 17.37 mg/ 100g.

Quality aspects of fresh-cut ‘long-storage tomato’ as affected by package, calcium chloride and storage time

2017 ◽  
Vol 53 (3) ◽  
pp. 819-827 ◽  
Author(s):  
Cristina Patanè ◽  
Angelo Malvuccio ◽  
Alessandro Saita ◽  
Paola Rizzarelli ◽  
Marco Rapisarda ◽  
...  
Keyword(s):  
Calcium Chloride ◽  
Storage Time ◽  
Quality Aspects ◽  
Fresh Cut ◽  
And Storage ◽  
Long Storage

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.

scholarly journals Effect of edible coating formulations and storage time on physical, sensory and microbiology properties of fresh-cut papaya

2020 ◽  
Vol 19 (2) ◽  
pp. 158-174
Author(s):  
Suthida Akkarachaneeyakorn ◽  
Wasitthi Niamsuwan ◽  
Sutheera Khantaphant
Keyword(s):  
Storage Time ◽  
Edible Coating ◽  
Fresh Cut ◽  
And Storage ◽  
Coating Formulations
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