Effect of decreasing nitrogen level in nutrient solution on butterhead lettuce growth, yield and leaf nutrient content in floating system

2018 ◽  
Vol 9 (3) ◽  
pp. 1-11
Author(s):  
E. S. Mortazavi Khorami ◽  
R. Barzegar ◽  
S. Rizee ◽  
◽  
◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Growth Yield ◽  
Nutrient Content ◽  
Nitrogen Level ◽  
Floating System ◽  
Lettuce Growth ◽  
Butterhead Lettuce

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 Growth, Yield, Nutrient Content and Fruit Quality of Carica papaya L. Under Controlled Conditions. II. Boron Effects

1969 ◽  
Vol 66 (2) ◽  
pp. 80-88
Author(s):  
Agripino Pérez ◽  
Norman F. Childers
Keyword(s):  
Nutrient Solution ◽  
Mineral Content ◽  
Carica Papaya ◽  
Growth Yield ◽  
Nutrient Content ◽  
Sand Culture ◽  
Mineral Contents ◽  
Four Levels ◽  
Panel Evaluation

A sand culture greenhouse experiment was conducted with papaya, Carica papaya L., variety Blue Solo, to determine the effects of four levels of Bin the nutrient solution (0.01, 0.05, 0.1 (control), and 1.5 p/m) on growth, fruiting and mineral content. B deficiency and B excess symptoms are described for leaves, petioles, central stems, and fruit. Mineral contents of leaves, petioles, and fruits are presented and discussed. Fruits receiving 0.05 p/m B in the nutrient solution were preferred. The critical level of B appears to be about 20 p/m in the petioles and leaves, whereas excess B occurred at about 70 and 300 p/m, respectively, for petioles and leaves. Quality components of the fruits are based on taste panel evaluation.

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.

scholarly journals Evaluation of Lettuce (Lactuca sativa L.) Production under Hydroponic System: Nutrient Solution Derived from Fish Waste vs. Inorganic Nutrient Solution

Horticulturae ◽  
2021 ◽  
Vol 7 (9) ◽  
pp. 292
Author(s):  
Zienab F. R. Ahmed ◽  
Alghazal K. H. Alnuaimi ◽  
Amira Askri ◽  
Nikolaos Tzortzakis
Keyword(s):  
Nutrient Solution ◽  
Organic Liquid ◽  
Growth Yield ◽  
Optimal Growth ◽  
Nutrient Content ◽  
Growth And Yield ◽  
Vegetable Production ◽  
Fish Waste ◽  
Hydroponic System ◽  
Fresh Products

Organic fresh products are appreciated and are gaining a good reputation regarding human health and environmental concerns. Despite the fact that hydroponics are commonly used in vegetable production, growers are looking for sustainable cultivation systems. Therefore, the objective of this study was to investigate the effect of using an organic-based nutrient solution (NS) derived from fish waste in a hydroponic system on the vegetative growth and production of lettuce compared to a conventional inorganic NS. Plant growth, yield, physiological and nutrient content parameters were determined. The results revealed that the overall growth and fresh biomass of the organic NS grown lettuce were relatively lower than those of the inorganic NS. Stomata density was significantly higher in inorganic grown lettuce compared to the organic one. However, the total chlorophyll, carotene, phenolic compounds, and flavonoid contents, as well as antioxidant activity were significantly higher in lettuce grown in organic NS compared to the inorganic one. Leaf nutrient content at harvest was significantly impacted by the type of used fertilizer. Based on these findings, in hydroponic system, organic liquid fertilizer derived from fish waste (as an alternative NS source) requires further improvements to achieve optimal growth and yield comparable to that of conventional inorganic NS.

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 Growth, yield and nutrient content of mungbean (Vigna radiata L.) in response to INM in eastern Uttar Pradesh, India

2018 ◽  
Vol 44 (3) ◽  
pp. 479-482 ◽  
Author(s):  
Yubaraj Dhakal ◽  
RS Meena ◽  
Nirmal De ◽  
SK Verma ◽  
Ajeet Singh
Keyword(s):  
Seed Yield ◽  
Harvest Index ◽  
Dry Matter ◽  
Uttar Pradesh ◽  
Growth Yield ◽  
Nutrient Content ◽  
Dry Matter Accumulation ◽  
Spad Value ◽  
Leaf Chlorophyll ◽  
Eastern Uttar Pradesh

Significant improvement in LAI, number of trifoliate, SPAD value of green leaf chlorophyll, dry matter accumulation, yield, harvest index (%) and nutrient content of mungbean were recorded due to application of 75% RDF + 2.5 t/ha vermicompost (VC) + Rhizobium (Rh)+ phosphorus solublizing bacteria (PSB), followed by 100% RDF + 2.5 t/ha VC and 100% RDF + Rh + PSB. The highest seed yield of mungbean was obtained with the application of 75% RDF + 2.5 t/ha VC + Rh + PSB (12.34 q /ha) followed by 100% RDF + 2.5 t/ha VC (12.05 q /ha) and 100% RDF + Rh+ PSB (11.95 q /ha).

scholarly journals Effect of NPK fertilization on production and leaf nutrient content of eucalyptus minicuttings in nutrient solution

2011 ◽  
Vol 35 (1) ◽  
pp. 249-254
Author(s):  
José Pereira Carvalho Neto ◽  
Enilson de Barros Silva ◽  
Reynaldo Campos Santana ◽  
Paulo Henrique Grazziotti
Keyword(s):  
Experimental Design ◽  
Nutrient Solution ◽  
Plant Material ◽  
Management Practice ◽  
Dry Weight ◽  
Nutrient Content ◽  
Fractional Factorial ◽  
Nutrient Contents ◽  
Adequate Nutrient ◽  
Npk Fertilization

Adequate nutrient levels in plants vary according to the species or clone, age and management practice. Therefore, adjustments of the nutrient solution are often necessary according to the plant material for multiplication. This study aimed to evaluate the influence of NPK fertilization on production and leaf nutrient contents of eucalyptus cuttings in nutrient solution. The study was conducted from November 2008 to January 2009 in a greenhouse. The experimental design was completely randomized fractional factorial (4 x 4 x 4)½, with a total of 32 treatments with three replications. The treatments consisted of four doses of N (50, 100, 200 and 400 mg L-1) as urea, P (7.5, 15, 30 and 60 mg L-1) in the form of phosphoric acid and K (50, 100, 200 and 400 mg L-1) in the form of potassium chloride in the nutrient solution. Only the effect of N alone was significant for the number and dry weight of minicuttings per ministump, with a linear decreasing effect with increasing N levels. The highest number of cuttings was obtained at a dose of 50, 7.5 and 50 mg L-1 of N, P and K, respectively.

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