scholarly journals Monitoring, calibration and maintenance of optimized nutrient solutions in curly lettuce (Lactuca sativa, L.) hydroponic cultivation

2018 ◽  
Vol 12 (04) ◽  
pp. 572-582 ◽  
Author(s):  
Antonio Fernandes Monteiro Filho ◽  
◽  
Carlos Alberto Vieira de Azevedo ◽  
Márcia Rejane de Queiroz Almeida Azevedo ◽  
Josely Dantas Fernandes ◽  
...  
Keyword(s):  
Lactuca Sativa ◽  
Lactuca Sativa L ◽  
Hydroponic Cultivation ◽  
Nutrient Solutions

scholarly journals Genotype-Dependent Tipburn Severity During Lettuce Hydroponic Culture Is Associated with Altered Nutrient Leaf Content

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 616
Author(s):  
Virginia Birlanga ◽  
José Ramón Acosta-Motos ◽  
José Manuel Pérez-Pérez
Keyword(s):  
Low Cost ◽  
Nutrient Content ◽  
Leafy Vegetables ◽  
Production Methods ◽  
Growing Seasons ◽  
Lactuca Sativa L ◽  
Hydroponic Cultivation ◽  
Highly Correlated ◽  
Nutrient Solutions ◽  
Nutrient Traits

Cultivated lettuce (Lactuca sativa L.) is one of the most important leafy vegetables in the world, and most of the production is concentrated in the Mediterranean Basin. Hydroponics has been successfully utilized for lettuce cultivation, which could contribute to the diversification of production methods and the reduction of water consumption and excessive fertilization. We devised a low-cost procedure for closed hydroponic cultivation and easy phenotyping of root and shoot attributes of lettuce. We studied 12 lettuce genotypes of the crisphead and oak-leaf subtypes, which differed on their tipburn resistance, for three growing seasons (Fall, Winter, and Spring). We found interesting genotype × environment (G × E) interactions for some of the studied traits during early growth. By analyzing tipburn incidence and leaf nutrient content, we were able to identify a number of nutrient traits that were highly correlated with cultivar- and genotype-dependent tipburn. Our experimental setup will allow evaluating different lettuce genotypes in defined nutrient solutions to select for tipburn-tolerant and highly productive genotypes that are suitable for hydroponics.

scholarly journals Changes in the Chemical Composition of Six Lettuce Cultivars (Lactuca sativa L.) in Response to Biofortification with Iodine and Selenium Combined with Salicylic Acid Application

Agronomy ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 660 ◽  
Author(s):  
Sylwester Smoleń ◽  
Iwona Kowalska ◽  
Peter Kováčik ◽  
Włodzimierz Sady ◽  
Marlena Grzanka ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Chemical Composition ◽  
Lactuca Sativa ◽  
Negative Impact ◽  
Biomass Productivity ◽  
Ascorbic Acid Content ◽  
Greenhouse Study ◽  
Lactuca Sativa L ◽  
Nutrient Film Technique ◽  
Nutrient Solutions

A two-year greenhouse study was conducted to assess the effects of the application of I (as KIO3), Se (as Na2SeO3), and salicylic acid (SA) in nutrient solutions on the chemical composition of six lettuce cultivars, i.e., two butterhead lettuces (BUTL), “Cud Voorburgu” and “Zimująca”; two iceberg lettuces (ICEL), “Maugli” and “Królowa lata”; and two Lactuca sativa L. var. crispa L. (REDL) cultivars, “Lollorossa” and “Redin”, grown in the NFT (nutrient film technique) system. The treatments were as follows: control, I+Se, I+Se+0.1 mg SA dm−3, I+Se+1.0 mg SA dm−3, and I+Se+10.0 mg SA dm−3. KIO3 was used at a dose of 5 mg I dm−3, while Na2SeO3 was used at 0.5 mg Se dm−3. The application of I+Se was a mild abiotic stress factor for the plants of the ICEL and REDL cultivars. In contrast, I+Se did not have a negative impact on the BUTLcultivars. The application of 1.0 mg SA dm−3 improved the biomass productivity in all cultivars compared with I+Se. In the majority of the cultivars, the applied combinations of I+Se and I+Se+SA resulted in a reduction in the nitrate(V) content that was beneficial to the consumer and increased levels of sugars, phenols, phenylpropanoids, flavonols, and anthocyanins. In addition, an increase in ascorbic acid content was observed, but only in the BUTL cultivars and REDL “Redin”. The application of I, Se, and SA had upward or downward effects on the concentrations of N, K, P, Ca, Mg, S, Na, B, Cu, Fe, Mn, Mo, and Zn in the leaves.

scholarly journals Wpływ szczepów bakterii wyizolowanych z hydroponicznej uprawy sałaty (Lactuca sativa L.) na wzrost siewek sałaty, rosnących w obecnosci rożnych form pożywienia azotowego [Influence of bacterial strains isolated from hydroponic cultures of lettuce (Lactuca sativa L.) on the growth of lettuce seedlings growing in the presence of various forms of nitrogen nutrition]

2015 ◽  
Vol 32 (2) ◽  
pp. 195-206
Author(s):  
Z. Kobierzyńska-Gołąb
Keyword(s):  
Ammonium Nitrate ◽  
Nutrient Solution ◽  
Lactuca Sativa ◽  
Nitrogen Nutrition ◽  
Cultivated Plants ◽  
Bacterial Strains ◽  
Lactuca Sativa L ◽  
Hydroponic Cultures ◽  
Nutrient Solutions ◽  
Growth Of Seedlings

320 bacterial strains isolated from the surface of cultivated plants, as well as from other parts of hydroponic cultures showed stimulating (49 bacterial strains) or inhibitory (9 bacterial strains) properties in respect to the investigated plant. The following bacteria were isolated: <i>Pseudomonas, Flavobacterium, Agrobacterium, Achromobacter</i> and <i>Chromobacterium</i>. The effects of active bacterial strains on the growth of seedlings were investigated in dependence on the kind of inorganic form of nitrogen present in the nutrient solutions. The same bacterial strains exerted a stimulating effect on seedlings growing on nitrates, weaker stimulation was observed in cultures with ammonium nitrate; the growth of lettuce seedlings on nutrient solution with ammonium only, was, as a rule, inhibited by the bacteria.

scholarly journals Pengaruh Penambahan Ca(NO3)2 Terhadap Hasil Tanaman Selada Kriting (Lactuca Sativa L.) pada Sistem Hidroponik Deep Flow Technique (DFT)

2020 ◽  
Vol 10 (2) ◽  
pp. 190
Author(s):  
NI NYOMAN SURYANTINI ◽  
GEDE WIJANA ◽  
RINDANG DWIYANI
Keyword(s):  
Lactuca Sativa ◽  
Maximum Yield ◽  
Calcium Nitrate ◽  
Vegetable Crops ◽  
Hydroponic System ◽  
Lactuca Sativa L ◽  
Deep Flow Technique ◽  
The Moment ◽  
Require Composition ◽  
Nutrient Solutions

The Effect of Addition of Ca(NO3)2 to the Results of Lettuce (Lactuca sativa L.) in the Hydroponic System of Deep Flow Technique (DFT). Plants, in general, require composition, concentration, and volume of nutrient solutions which different depends on the type and phase of plant growth. Leaf vegetable crops such as lettuce (Lactuca sativa L.) require higher Nitrogen (N) nutrients than other vegetable crops, but the problem we faced at the moment is the hydroponic nutrients that are traded only in the general form of nutrient, therefore the addition of N nutrients in the form of calcium nitrate (Ca(NO3)2) needs to be done to meet the needs of lettuce plants. This study was aimed to determine the effect of the addition of Ca(NO3)2 and to find the optimum dosage of the addition of Ca(NO3)2 to the general hydroponic nutrition of vegetables on lettuce use DFT hydroponic system. The treatments consisted of five levels which are nutrition AB Mix general vegetable as a control, and nutrition AB Mix with the addition of 30 g, 60 g, 90 g, and 120 g Ca(NO3)2.  The results of the observation showed that the treatment of the addition of Ca(NO3)2 fertilizer had a very significant effect on all observed variables, except for the diameter of the lettuce plant. The optimum addition of Ca(NO3)2 for lettuce was found at 90.04 g with a maximum yield of 207.92 g.

scholarly journals Effect of Manganese Nutrition on Content of Nutrient and Yield of Lettuce (Lactuca Sativa L.) in Hydroponic/Wpływ Żywienia Manganem Na Zawartość Składników I Plonowanie Sałaty (Lactuca Sativa L.) W Hydroponice

2014 ◽  
Vol 21 (3) ◽  
pp. 529-537 ◽  
Author(s):  
Tomasz Kleiber
Keyword(s):  
Nutrient Solution ◽  
Significant Influence ◽  
Lactuca Sativa ◽  
Closed System ◽  
Sodium Content ◽  
Manganese Concentration ◽  
Nutrient Contents ◽  
Lactuca Sativa L ◽  
Hydroponic Cultivation ◽  
Manganese Nutrition

Abstract The aim of conducted studies was estimation of increase manganese nutrition on content of nutrient and yielding of lettuce (Lactuca sativa L.) in hydroponic cultivation. Plants were grown in rockwool using closed system fertigation with recirculation of nutrient solution. In experiment were used nutrient solution with following nutrient contents [mg·dm-3]: N-NH4 < 10, N-NO3 150, P-PO4 50, K 150, Ca 150, Mg 50, Fe 3.00, Zn 0.44, Cu 0.03, B 0.011, pH 5.50, EC 1.8 mS·cm-1. It was studied the following manganese concentrations in nutrient solution (in [mg・dm-3]): 0.5, 4.8, 9.6, 19.2 (described as Mn-I, Mn-II, Mn-III and Mn-IV). It was found a significant influence of increasing manganese concentration applied in fertigation on the content of: N, K (for Mn-IV); P, Fe, Cu (for Mn-III and Mn-IV); Mg, Zn (for Mn-II to Mn-IV) in aboveground parts of lettuce. It was no differences in case of calcium and sodium content. Increasing concentration of manganese used to fertigation significantly influenced the content of Mn in plants. Manganese also affected on the SPAD measurement (decreasing at Mn-IV) and yielding of the plants (decreasing for Mn-II to Mn-IV comparing with Mn-I).

scholarly journals CRESCIMENTO E COMPOSIÇÃO MINERAL DA ALFACE NO SISTEMA HIDROPÔNICO POR CAPILARIDADE

Irriga ◽  
2005 ◽  
Vol 10 (2) ◽  
pp. 146-154 ◽  
Author(s):  
Joseane Oliveira da Silva ◽  
Pahlevi Augusto de Souza ◽  
Júlio Gomes Júnior ◽  
Paulo Roberto G. Pereira ◽  
Felizardo Adenilson Rocha
Keyword(s):  
Mineral Composition ◽  
Lactuca Sativa ◽  
Dry Matter ◽  
Leaf Number ◽  
Hydroponic System ◽  
Artificial Aeration ◽  
Lactuca Sativa L ◽  
Hydroponic Cultivation ◽  
Grand Rapids ◽  
Root Size

CRESCIMENTO E COMPOSIÇÃO MINERAL DA ALFACE NO SISTEMA HIDROPÔNICO POR CAPILARIDADE  Joseane Oliveira da Silva1; Pahlevi Augusto de Souza2; Júlio Gomes Júnior2; Paulo Roberto G. Pereira2; Felizardo Adenilson Rocha31CCTA - Produção Vegetal, Universidade Estadual do Norte Fluminense , Campos dos Goytacazes, RJ, [email protected] de Fitotecnia, Universidade Federal de Viçosa, Viçosa, MG, 3Departamento de Engenharia Agrícola, Universidade Federal de Viçosa, Viçosa, MG,    1 RESUMO           Este trabalho avaliou o crescimento e composição mineral da Alface cv. Grand Rapids no sistema hidropônico por capilaridade. Comparou-se capilares com 1 ou 2 cordões, de diferentes composições físico-químicas, no cultivo hidropônico de alface para um experimento conduzido em casa de vegetação. Os tratamentos consistiram na adoção de dois tipos de capilares, utilizando 1 ou 2 unidades por tratamento (sem aeração), contrastando com o cultivo convencional (sistema sem capilar e aerado artificialmente - testemunha). Foram avaliados os seguintes parâmetros: altura da parte aérea, comprimento da raiz, número de folhas, volume de raiz, teores de água nas folhas, relação parte aérea/raiz, acúmulo de nitrogênio na planta, Eh, pH, condutividade elétrica, N-NO3-, N-NH4+, P, K, S e B na folha. O cultivo hidropônico convencional não diferiu do cultivo hidropônico por capilaridade quanto ao número de folhas, volume de raiz, crescimento radicular, matéria seca da parte aérea, matéria seca da folha. Os cultivos hidropônicos capilar sem arejamento e, sem capilar e sem arejamento apresentam a mesma qualidade de produção quando comparado com o sistema convencional com arejamento através de compressor, sendo este último sistema muito mais oneroso, uma vez que requer gasto de energia elétrica para bombeamento de água. UNITERMOS: Lactuca sativa L,  nutrição mineral.  SILVA, J. O.; SOUZA, P. A.; JÚNIOR, J. G.; PEREIRA, P. R. G.; ROCHA, F. A.  GROWTH AND MINERAL COMPOSITION OF LETTUCE ON CAPILLARY HYDROPONIC SYSTEM  2 ABSTRACT This study evaluated the growth and mineral composition of lettuce cv Grand Rapids in a capillary hydroponic system. An experiment, carried out in greenhouse, compared different physical and chemical composition capillary with 1 or 2 strings in a hydroponic lettuce cultivation. Treatments consisted of 2 types of capillary, using 1 or 2 units per treatment (without aeration) compared to conventional cultivation (non-capillary system with artificial aeration – control system). The following parameters were evaluated: shoot height, root length, leaf number, root size, leaf water content, shoot/root relation, nitrogen accumulation in plant, Eh, pH, electric conductivity, N-NO3-, N-NH4+, P, K, S and B in the leaf. The conventional hydroponic cultivation did not differ from the capillary hydroponic system in relation to leaf number, root size, root growth, shoot dry matter and leaf dry matter. The hydroponic cultivation without aeration and the one without aeration and capillary presented the same production quality when compared to the conventional system with artificial aeration. Thus, the latter is a more expensive system once electricity is required to operate the water pumping system. KEYWORDS: Lactuca sativa L, mineral nutrition.

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