EFFECT OF ELECTRICAL CONDUCTIVITY OF THE NUTRIENT SOLUTION ON THE GROWTH AND YIELD OF THREE NATIVE TOMATO GENOTYPES (LYCOPERSICON ESCULENTUM VAR. CERASIFORME)

2014 ◽  
pp. 501-504
Author(s):  
P. Juárez-López ◽  
E. Cruz-Crespo ◽  
R. Bugarín-Montoya ◽  
J.D. García-Paredes ◽  
L. Martínez-Cárdenas ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Lycopersicon Esculentum ◽  
Nutrient Solution ◽  
Growth And Yield ◽  
Tomato Genotypes

scholarly journals Effect of N:K Ratio and Electrical Conductivity of Nutrient Solution on Growth and Yield of Hydroponically Grown Golden Thistle (Scolymus hispanicus L.)

Proceedings ◽  
2020 ◽  
Vol 30 (1) ◽  
pp. 87
Author(s):  
Dimitrios Papadimitriou ◽  
Emmanouil Kontaxakis ◽  
Ioannis Daliakopoulos ◽  
Thrassyvoulos Manios ◽  
Dimitrios Savvas
Keyword(s):  
Electrical Conductivity ◽  
Nutrient Solution ◽  
Chlorophyll Concentration ◽  
Tuberous Root ◽  
Growth And Yield ◽  
Nutrient Concentrations ◽  
Fresh Weight ◽  
Natural Habitats ◽  
High Quality ◽  
Hydroponic Cultivation

As the demand for high-quality wild greens rises, due to their high nutritional, culinary, and medicinal properties, the potential overexploitation and excessive disruption of their natural habitats bring serious environmental problems to the foreground. However, new alternative cultivation techniques, such as hydroponic cultivation, could take advantage of rational water management, optimal fertilization management and climate adaptation, to produce high-quality wild greens, all year round. As an initial step to assess optimal hydroponic cultivation conditions for golden thistle (Scolymus hispanicus L.), in this study we evaluated the effect of N:K ratio and electrical conductivity (EC) in the supplied nutrient solution on plant growth, yield and phenology. Four nutrient solutions were applied with a low or a high N:K ratio (1.59 or 2.38 mol/mol, respectively) combined with a low or a high electrical conductivity (EC) level (2.2 and 2.8 dS m−1, respectively) in a 2 × 2 factorial experiment set as a completely randomized block design with 4 blocks and 48 plants per block. Golden thistle seedlings were planted in plastic growth-bags of hydroponic perlite substrate in an open, drip-irrigated, soilless cultivation system. The experiment commenced in December 2018, in a plastic greenhouse at the campus of the Hellenic Mediterranean University, Crete, Greece. After four months of cultivation, the post-harvest analysis showed that the high N:K ratio significantly increased the fresh weight of leaf and edible tuberous root, whereas the tested EC levels in the nutrient solution had no impact on plant fresh weight. The experimental treatments did not significantly affect leaf chlorophyll concentration (SPAD meter readings), chlorophyll fluorescence (Fv/Fm) or the number of leaves and the specific weight of the tuberous root of the plants. Our results indicate that wild golden thistle could be domesticated as an edible vegetable, and cultivated hydroponically at different seasons of the year using relatively low nutrient concentrations, thereby minimizing aquifer nitrate and phosphate pollution. A nutrient solution with a relatively high N:K ratio (here 2.38 mol/mol) is recommended for the hydroponic cultivation of golden thistle.

scholarly journals Soilless Cultivation System, Electrical Conductivity of Nutrient Solution and Growing Season on Yield and Quality of Baby-Leaf Oak-Leaf Lettuce

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1220
Author(s):  
Giulia Conversa ◽  
Anna Bonasia ◽  
Corrado Lazzizera ◽  
Antonio Elia
Keyword(s):  
Electrical Conductivity ◽  
Product Quality ◽  
Nutrient Solution ◽  
Late Spring ◽  
Growth And Yield ◽  
Nitrate Content ◽  
Saline Stress ◽  
Leaf Production ◽  
Leaf Lettuce ◽  
Oak Leaf Lettuce

The floating system (FL) is a common soilless method for baby-leaf production, whereas the ebb and flow system (EF) has been proposed as an alternative. Both of them allow managing plant saline stress while preventing reduction in plant growth and yield and increasing product quality. The oak-leaf lettuce response to the growing conditions (hydroponics, salinity) in interaction with climate and genotype has been little studied. Two experiments were carried out with two oak-leaf cultivars (green- and red-colored type) grown in FL and EF systems at two levels of nutrient solution (NS) electrical conductivity (EC) (EC = 2.5 and 3.5 dS m−1; EC2.5, EC3.5, respectively) under autumn and late-spring conditions. The EF system caused an increase in salinity in the substrate where roots mainly develop, so it overcomes the effect of the EC3.5 treatment. In the autumn cycle, irrespective of the EC, EF-grown plants had improved leaf thickness (specific leaf area), color, and antioxidative (total phenol and carotenoid contents) properties; however, a reduction in yield was observed in the most productive cultivar (green type). In late spring, higher yield and product quality (processability, nitrate content) were obtained at the expense of color, with the FL showing the best productivity in the green type cultivar. The red type cultivar had higher dry mass, phenol, and carotenoid concentrations.

scholarly journals Performance of Hydroponically Cultivated Geranium and Common Verbena under Salinity and High Electrical Conductivity Levels

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1237
Author(s):  
Antonios Chrysargyris ◽  
Spyridon A. Petropoulos ◽  
Dejan Prvulovic ◽  
Nikolaos Tzortzakis
Keyword(s):  
Electrical Conductivity ◽  
Chlorophyll Fluorescence ◽  
Nutrient Solution ◽  
High Salinity ◽  
Stomatal Resistance ◽  
Water Sources ◽  
Total Flavonoid ◽  
Control Treatment ◽  
Total Phenolic ◽  
High Electrical Conductivity

Abiotic factors in nutrient solutions (NSs), such as salinity and high electrical conductivity (EC), may adversely alter plant growth and crop performance. However, there are medicinal/aromatic plants which can not only withstand these adverse conditions, but which can also increase their productivity or even enhance their quality in such conditions. As fresh water sources suitable for irrigation are becoming more and more limited, the use of low-quality water sources and hydroponic growing systems have been suggested as the main alternatives. Towards that direction, this study aims to evaluate the effect of high EC levels in NSs on geranium (Pelargonium graveolens L’Hér.) and common verbena (Verbena officinallis L.) plants cultivated in a soilless (perlite) hydroponics system. Plants were irrigated with a full nutrient solution of EC 2.1 dS m−1 and pH 5.8 until they reached a uniform size. Then, three treatments were applied, namely: (a) a control treatment with an EC of 2.1 dS m−1 in the NS, (b) a high-salinity NS created by adding 75 mM of NaCl (EC under 8.5 dS m−1) and (c) a concentrated NS with an EC of 8.5 dS m−1. In pelargonium, high salinity decreased the total phenolic and total flavonoid contents; antioxidant capacity; N, K, Mg and P content; as well as chlorophyll fluorescence, compared to the control treatment. On the other hand, increased salinity levels increased the Na and Ca content and stomatal resistance. In common verbena, salinity decreased total phenolic content and chlorophyll fluorescence but increased total flavonoid content; antioxidants; leaf K, P, Na, Cu and Zn content; and stomatal resistance, compared to the control. In both species, high EC did not affect polyphenols, flavonoids or antioxidants, whereas it increased stomatal resistance and nutrient accumulation in the leaves, and decreased chlorophyll fluorescence compared to the control treatment. Damage indices, indicated by lipid peroxidation, hydrogen peroxide production and the elevation of enzymes’ antioxidant activities, were evidenced in both saline- and high-EC-treated plants. In conclusion, despite having the same EC levels in the nutrient solution, it seems that ionic stress caused by high mineral concentrations in the nutrient solution had less severe effects on the tested plants than the relevant osmotic stress caused by high salinity due to the addition of NaCl in the nutrient solution.

scholarly journals RESPONS PERTUMBUHAN DAN HASIL TANAMAN SELEDRI (APIUM GRAVEOLENS L.) TERHADAP MEDIA TANAM DAN KONSENTRASI LARUTAN NUTRISI YANG BERBEDA PADA WICK SYSTEM

2021 ◽  
Vol 46 (2) ◽  
pp. 232
Author(s):  
Maria Ulfa ◽  
Hadi Pranoto ◽  
Susylowati Susylowati
Keyword(s):  
Nutrient Solution ◽  
Block Design ◽  
Dry Weight ◽  
Orthogonal Test ◽  
Growth And Yield ◽  
Apium Graveolens ◽  
Optimum Point ◽  
Significant Difference ◽  
Nutrient Solutions ◽  
Polynomial Orthogonal

This research aims to find out 1) the interaction between the medium of planting and the concentration of nutrient solutions to the growth and yield of celery plants hydroponically. 2) types of planting media that can give different influences on the growth and yield of celery plants, and 3) concentration of nutrient solution that provides the best growth and yield of celery plants in different planting media.The research was conducted from December 2019 to February 2020 at the Integrated Laboratory of the Faculty of Agriculture of Mulawarman University, Samarinda. The research used factorial exsperiment 3×4 on Randomized Completely Block Design (RCBD), replicated three times with each treatment consisting of three plants. The first factor is the planting medium consisting of rockwool, charcoal husk, and combination of charcoal husk + tea amps. The second factor is the concentration of AB Mix nutrient solution consists of 500, 1,000, 1,500, and 2,000 ppm. The data was analyzed with test F and continued Least Significant Difference (LSD) test with a level of 5%.  The results showed that there is an interaction between planting media and concentration of nutrient solution in the growth and yield of celery plants. The interaction between the combination of charcoal planting media + tea pulp and concentration of 1,500 ppm is not real with the interaction of rockwool planting media and concentration of 1,500 ppm. From various types of planting media used, charcoal husk planting media provides the best influence on the growth and yield of celery plants. Based on polynomial orthogonal test the concentration of nutrient solution with an optimum point of 1,460.84 ppm affects the growth and yield of celery plants with a maximum dry weight of 2.14 g.

scholarly journals EFFECT OF DIPPING IN GIBBERLLIC ACID AND SPRAYING NUTRIENT SOLUTION AGRO LEAF ON SOME VEGETATIVE GROWTH AND YIELD OF JERUSALUM ARTICHOKE.

2016 ◽  
Vol 47 (4) ◽  
Author(s):  
Sadik & et al.
Keyword(s):  
Leaf Area ◽  
Nutrient Solution ◽  
Vegetative Growth ◽  
Dry Weight ◽  
Factorial Experiment ◽  
Growth And Yield ◽  
Control Treatment ◽  
Highest Weight ◽  
Number Of Leaves ◽  
Number Of Branches

This study was conducted in experimental fields, Department of Horticulture, University of Bagdad, in Abu-Graib  during season 2011-2012 for jerusalum artichoke. This study was included the effect of dipping tubers in three concentrations of GA3(2.5,5,10g/l) (G1,G2,G3),as well as to control treatment (G0), and spraying nutrient solution Agro leaf A1 (8g/l), as well as to control treatment (A0). This study was made by using Factorial experiment (4*2) within the design RCBD with three replicates. Results could be summarized as follows: G3A0 increased field emergence (12.00 day), G2A0 increased percentage of germination (99.33%) and G2A1 increased number of branches (4.60 stem.plant-1) but the treatment G1A1gave highest rate for number of leaves, leaf area, guide of leaf area, dry weight of the vegetative parts and dry weight of 100gm tubers as(4495.10 leaf.plant-1, 2246.20 dsm2, 99.84, 922.40g, 24.00g.) respectively. The treatments gave significant differences quantity yield, so treatment G3A0 gave highest weight of the tubers as(45.55g.) but the treatment G3A1 gave highest number of the tubers as(68.00 tuber.plant-1 ) and highest yield of plant as (2890g/plant).

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