scholarly journals Agronomic and sensory evaluation of lettuce in hydroponic system

2021 ◽  
Vol 37 ◽  
pp. e37074
Author(s):  
Jean Jefferson de Sá ◽  
Carolina Medeiros Vicentini-Polette ◽  
Marta Regina Verruma-Bernardi ◽  
Marta Helena Fillet Spoto ◽  
Fernando César Sala

Lettuce is the most important leafy vegetable in Brazil. Hydroponic lettuce cultivation has grown due to the viability of harvesting throughout the year. In this context, this study aimed to evaluate the agronomic characteristics, color, and preference of curly lettuce in the NFT hydroponic system. Six lineages (6601-1A, 6601-2L, 7016-6A, 7119-1B, 7223-1A, and 7224-4A) and two commercial cultivars (Brida and Vanda) of lettuce were used, in a completely randomized blocks design with four replications. Shoot length, root length, stem length, number of leaves, stem diameter, plant diameter, shoot fresh mass, root fresh mass, chlorophyll content, instrumental color, and sensory characteristics were evaluated. As for agronomic evaluation, the bolting of 6601-2L lettuce was relevant in different attributes. The Vanda lettuce and the lineage 7016-6A presented best performances for shoot fresh mass (399.44 and 378.63 g, respectively), while the lineages 7119-1B and 6601-2L present the worst performance (279.50 and 273.13 g, respectively). There was variation in chlorophyll content and luminosity, however, the evaluators did not notice differences between lettuces for brightness or green color, as well as for crunchy texture. Lettuces 6601-2L, 7224-4A, 6601-1A, Brida, 7223-1A, and 7119-1B were preferred. The variation among plants may be due to different situations, such as harvesting times and bolting, and a direct relationship between agronomic properties and preference among lettuces has not been established yet.

HortScience ◽  
1997 ◽  
Vol 32 (4) ◽  
pp. 593E-594
Author(s):  
Mack Wilson ◽  
Dianna Rogers ◽  
Victor Khan ◽  
Clauzell Stevens

Styrofoam ice trays were used to grow `Discovery Yellow' marigolds transplanted 4 weeks after seeds were germinated and then grown in two nutrient cultures. The cultures were Hoagland at the rate of 1/2 ml/6 gal water and nutraculture (20-10-20) at 2.4 ozs/6 gal water. Half containers were aerated and other half were not aerated. Data collected were root, stem, bloom fresh and dry weight, and stem length and number of blooms and leaves. Results showed that stem length, and number of leaves and blooms were significantly greater when grown in Hoagland solution. Fresh and dry weight of roots, stems, and blooms were significantly greater when grown in Hoagland solution. Nonaerated treatments performed significantly better than aerated treatments for either hydroponic solutions.


2014 ◽  
Vol 36 (3) ◽  
pp. 680-685
Author(s):  
Márcio de Carvalho Pires ◽  
Osvaldo Kiyoshi Yamanishi ◽  
José Ricardo Peixoto

This study aimed to evaluate the performance of 'Feizixiao', 'Nuomici', 'Heiye', 'Kway May Pink' and 'Bengal' lychee cultivars topworked onto bearing 'Bengal' trees. The experiments were carried out in commercial orchard at Rio das Pedras Farm in Jundiaí, state of São Paulo. The experimental design consisted of randomized blocks in a subdivided parcel arrangement, in which the parcel consisted of five cultivars and the sub-parcel consisted of six evaluation periods. Five replicates of three plants per parcel and six grafts per plant, (with two grafts per main branch) were used. The trees were approximately 10 years old propagated by air layering and planted with 6 x 4 m (416 plants/ha) spacing. The following characteristics were evaluated: success rate of the grafts, number of shoots, shoot length, number of nodes, number of leaves and chlorophyll content (SPAD). The control ('Bengal'/'Bengal') had the highest grafting success rate with 89.9%. On the other hand, 'Heiye', 'Feizixião', 'Nuomici' and 'Kway May Pink' had, respectively, 60.6, 55.0, 52.6 and 47.0% grafting success rates. All of the shoot grafts had normal growth with no signs of incompatibility. Therefore, the cultivars studied are compatible with 'Bengal' and may be used on commercial orchards.


2020 ◽  
Vol 13 (4) ◽  
pp. 65
Author(s):  
D. O. Souza ◽  
R. Agustini ◽  
G. S. Romero ◽  
P.E. S. Rueda ◽  
V. C. Galati

Lettuce (Lactuca sativa) belongs to the asteraceae family, known worldwide and appreciated for generations. Due to the great acceptance, the lettuce is a vegetable of high consumption. In search of solutions for high productivity some techniques have been researched to reduce the stress suffered by the plant to the environment. This study aimed to verify that the aqueous extract of tiririca, in different strengths, present some allelopathic effect on the development of the lettuce. The use of the aqueous extract, which has in its composition the Indole Acetic Acid-AIA (Auxin), was used by capillary irrigation, with the following treatments: T0-control; T1- 25% of concentration; T2- 50% of concentration; T3- 100% of concentration. This study consisted of five replicates and five plants per treatment, with a total of 100 plants. The design was completely randomized. The analyzes were root size, shoot development by fresh mass plant, number of leaves and chlorophyll content. According to the data, it was observed that the concentration of the 100% root extract resulted in higher values of root development, however, affected shoot growth, a result verified in the fresh mass, in which the plants presented reduced weight when compared to the other treatments, and consequently affected the amount of leaves produced by the plants submitted to this treatment, the chlorophyll content was also lower for the plants treated with the maximum concentration of the extract. Therefore, it can be concluded that high dosages of the tiririca extract had an allelopathic effect inhibiting the growth and development of the lettuce plants, and did not present a satisfactory result.


Author(s):  
Nur Syahirah Talib ◽  
Diyana Jamaludin ◽  
Nur Sakinah Abdul Malek

The effect of lights generated by red, blue and white light emitting diodes (LED) on growth and development of lettuce were investigated and compared with lettuce without supplemental lighting. A vertical multi-tier hydroponic system was used to grow lettuce. Each tier consisted of 60 heads of lettuce with different LED colour and one tier without LED was used as control. The following measurements on plant physiology were taken: number, length and chlorophyll content of leaves, height and weight of plants. Based on number of leaves, red LED shows the highest number of leaves compared to lettuce under blue, white and control treatment. The similar trend also can be found in the lengths of leaves which shows the highest length produce under red LED.  Red LED also produce highest weight of lettuce by 28% as compared to white LED. White LED improved lettuce growth development in the height by 13% and amount of chlorophyll content. Lettuce grown under blue LED shows lowest growth and development compared to lettuce grown under red and white LEDs based on parameters above, and lettuce without LED were died within 2 weeks.  This result indicated that the red LED was the most effective spectra in growth response of lettuce plants. This study also demonstrates the effectiveness of LED in improving lettuce growth on vertical multi-tier hydroponic system.


2018 ◽  
Vol 36 (3) ◽  
pp. 408-413
Author(s):  
Tiago JL Lima ◽  
Rodrigo Gazaffi ◽  
Guilherme J Ceccherini ◽  
Luana Marchi ◽  
Marcela Martinez ◽  
...  

ABSTRACT Lettuce seedlings used on hydroponic cultivation (NFT) are usually produced in trays with small volume, requiring two transplants: from tray to nursery and then to the definitive place. The aim of this study was to verify lettuce performance under NFT system, using seedlings produced in trays with several cell volumes (50, 40, 35, 31, 30, 29, 27, 20 and 10 cm³ cell-1). The tray volumes are considered treatments. The experimental design was completely randomized blocks, with four replicates. Seedlings were transplanted directly to the definitive profile, except those ones produced in 10 cm³ cell-1. Two harvests were performed, at 22 and 29 days after transplant (DAT). We evaluated number of senescent leaves, total number of leaves, shoot fresh mass, root fresh mass, shoot dry mass, stem length and productivity. The best performance was obtained using seedlings produced in trays with higher volume per cell. The nursery phase was not necessary and it was possible to obtain reduction from two to one transplant, corresponding to trays of 20 to 50 cm³ cell-1. Seedlings produced in trays with 40 and 50 cm³ cell-1 made the early harvest possible, at 22 DAT of cultivation under hydroponic NFT system.


2007 ◽  
Vol 70 (8) ◽  
pp. 1901-1908 ◽  
Author(s):  
XUETONG FAN ◽  
KIMBERLY J. B. SOKORAI

The effects of irradiation (0, 1.8, and 4.5 kGy) on the quality of frozen corn and peas were investigated during a 12-month period of postirradiation storage at −18°C. Irradiation of frozen corn and peas caused a reduction in ascorbic acid content of both vegetables and a loss of texture in peas but had no significant effects on instrumental color parameters (L*, a*, and b*), carotenoid and chlorophyll content, or antioxidant capacity of corn and peas. Irradiation reduced microbial loads of frozen peas and increased display life at 23°C of thawed peas by preserving the green color, apparently because of slower increases in the population of acid-producing microorganisms in the irradiated samples. Overall, irradiation significantly reduced the microbial load and increased the display life of peas and had minimal detrimental effects on the quality of frozen corn and peas.


Irriga ◽  
2018 ◽  
Vol 23 (2) ◽  
pp. 286-297
Author(s):  
Douglas Roberto Bizari ◽  
João Victor Franco Battibugli ◽  
Jean Carlos Cardoso ◽  
Rodrigo Gazaffi ◽  
Claudinei Fonseca Souza

Água de REÚSO no cultivo de gladíolo em sistema hidropônico     DOUGLAS ROBERTO BIZARI1*; JOÃO VICTOR FRANCO BATTIBUGLI2; JEAN CARLOS CARDOSO3; RODRIGO GAZAFFI3 E CLAUDINEI FONSECA SOUZA1   1Professor, Departamento de Recursos Naturais e Proteção Ambiental, Universidade Federal de São Carlos/UFSCar, C.P. – Araras, SP – Brasil. E-mail: [email protected]; [email protected] 2Bacharel em Agroecologia, Universidade Federal de São Carlos/UFSCar, CEP 13600-970 – Araras, SP – Brasil. E-mail: [email protected] 3Professor, Departamento de Biotecnologia e Produção Vegetal e Animal, Universidade Federal de São Carlos/UFSCar, CEP 13600-970 – Araras, SP – Brasil. E-mail: [email protected]; [email protected]       1 RESUMO   A utilização de água de reúso tratada é uma alternativa para minimizar o volume de água captada necessário à agricultura irrigada. Ao mesmo tempo, o consumo de alimentos produzidos com efluente doméstico tratado ainda apresenta entrave cultural, sendo então, uma alternativa o cultivo de flores e plantas ornamentais. Objetivou-se com esse trabalho avaliar o desenvolvimento de gladíolo em cultivo hidropônico, utilizando-se água residuária tratada no Centro de Ciências Agrárias da Universidade Federal de São Carlos. O delineamento experimental utilizado foi o de blocos ao acaso, com três tratamentos e quatro repetições. Os tratamentos utilizados foram: água de abastecimento + fertilizantes (TAF), água de reúso + fertilizantes (TRF) e apenas água de reúso (TR). Para a avaliação das plantas foram realizadas as medições de altura de planta (AP), número total de folhas por planta (NFP), comprimento da haste floral (CH), número de botões florais por haste (NBF) e diâmetro das pétalas (DP). A água de reúso tratada pode ser uma fonte alternativa para o cultivo hidropônico de gladíolo. Os resultados obtidos no TRF para o desenvolvimento da cultura e qualidade das suas flores foram similares ao TAF. A utilização apenas de TR não é indicada para o cultivo hidropônico de gladíolo, pois não possibilitou que as plantas completassem seu ciclo até o florescimento.   Palavras-chave: água de reúso, hidroponia, floricultura, sustentabilidade.     BIZARI, D. R,; BATTIBUGLI, J. V. F.; CARDOSO, J. C.; GAZAFFI, R.; SOUZA, C.  F. REUSE WATER IN THE GLADIOLUS CULTIVATION IN HYDROPONIC SYSTEM     2 ABSTRACT   The use of treated wastewater is an alternative to reduce the amount water needed to irrigate agriculture. At the same time, the consumption of food produced with use of treated effluent is still a cultural obstacle, so, the cultivation of flowers and ornamental plants is an alternative. This study aimed at assessing the development of gladiolus in hydroponic system using treated reuse water in the Center of Agricultural Sciences of the Federal University of São Carlos. The experimental design was randomized blocks with three treatments and four replications: water supply + fertilizers (TAF), reuse water + fertilizers (TRF) and only reuse water (TR). Plant height (AP), number of leaves per plant (NFP), inflorescence stem length (CH), number of flower buds per stem (NBF) and diameter of petals (SD) were evaluated. Reuse water can be used for gladiolus cultivation in hydroponic system. Results obtained in TRF for the development of the culture and quality of flowers were similar to those of TAF. The use of TR alone is not indicated for gladiolus cultivation in hydroponic system, once the plants died before flowering.   Keywords: reuse water, hydroponic system, floriculture, sustainability.


Nabatia ◽  
2016 ◽  
Vol 4 (2) ◽  
pp. 57-63
Author(s):  
M Abror ◽  
M Koko Ardiansyah

This study aims to determine the effect of trimming with a wide variety of growing media hydroponic system fertigation on growth and yield of melon. Research will be conducted in the green house (House of plastic) UMSIDA Agriculture Faculty, Campus 2, Gelam, Candi, Sidoarjo, research time between the months of March to June 2016 using analysis of variance and continued test HSD 5%. The variables measured were plant height, leaf number, level of sweetness of fruit, fruit weight, high-fruit, thickness of the flesh of the fruit, conclusion from this research is going on the effect of trimming and a wide variety of growing media hydroponic system fertigation in treatment PM5 (trimming down, kokopit). There was also a real influence on the treatment PM6 (without pruning, kokopit) .In observation of plant height, leaf number, fruit weight, and high fruit. And also happens to influence a wide range of growing media on growth and yield of melon on hydroponics fertigation system, the PM6 treatment (without pruning, kokopit) had the highest rates in the observation of plant height, weight of the fruit, and the number of leaves.


2014 ◽  
Vol 11 (1) ◽  
pp. 45-52 ◽  
Author(s):  
SR Singh ◽  
NA Ahmed ◽  
S Lal ◽  
Asima Amin ◽  
Mudasir Amin ◽  
...  

Character association and path analysis in twenty genotypically diverse indigenous genotypes of garlic (Allium sativum L.) were studied at the Central Institute of Temperate Horticulture, Srinagar during the years 2010 and 2011 for nine important characters. Total bulb yield showed positive and significant genotypic and phenotypic associations with plant height, number of leaves per plant, pseudo-stem length, bulb weight and number of cloves per bulb, indicating that selection based on these traits will help increasing the yield of garlic. Path coefficient analysis provides an effective means of a critical examination of specific force action to produce a given correlation and measure the relative importance of each factor. In this analysis bulb yield was taken as dependant variable and rest characters were considered as independent variable. Bulb weight showed high positive and direct effect and significant positive correlation with total bulb yield. Therefore, bulb with higher weight should be considered in selection criteria for increasing the total bulb yield and emphasis should be given for selecting the genotypes with higher bulb weight. Overall path analysis indicated that direct effect of bulb weight and equatorial bulb diameter and indirect effect of plant height, number of leaves per plant, pseudo stem length, polar bulb diameter, equatorial bulb diameter, number of cloves per bulb and average weight of 50 cloves should be considered simultaneously for amenability of total bulb yield. DOI: http://dx.doi.org/10.3329/sja.v11i1.18374 SAARC J. Agri., 11(1): 45-52 (2013)


2021 ◽  
Vol 22 (1) ◽  
pp. 17-30
Author(s):  
Nataliya Dimitrova ◽  
Lilyana Nacheva ◽  
Małgorzata Berova ◽  
Danuta Kulpa

In vitro micropropagation of plants is highly useful for obtaining large quantities of planting material with valuable economic qualities. However, plantlets grow in vitro in a specific environment and the adaptation after the transfer to ex vitro conditions is difficult. Therefore, the acclimatization is a key step, which mostly determines the success of micropropagation. The aim of this investigation was to study the effect of the biofertlizer Lumbrical on ex vitro acclimatization of micropropagated pear rootstock OHF 333 (Pyrus communis L.). Micropropagated and rooted plantlets were potted in peat and perlite (2:1) mixture with or without Lumbrical. They were grown in a growth chamber at a temperature of 22±2 °C and photoperiod of 16/8 hours supplied by cool-white fluorescent lamps (150 µmol m-2 s-1 Photosynthetic Photon Flux Density, PPFD). The plants were covered with transparent foil to maintain the high humidity, and ten days later, the humidity was gradually decreased. Biometric parameters, anatomic-morphological analyses, net photosynthetic rate and chlorophyll a fluorescence (JIP test) were measured 21 days after transplanting the plants to ex vitro conditions. The obtained results showed that the plants, acclimatized ex vitro in the substrate with Lumbrical, presented better growth (stem length, number of leaves, leaf area and fresh mass) and photosynthetic characteristics as compared to the control plants. This biostimulator could also be used to improve acclimatization in other woody species


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