scholarly journals Effects of nutrient solution and artificial light on the growth and physicochemical properties of hydroponically cultivated barley

2021 ◽  
Vol 48 (2) ◽  
pp. 77-85
Author(s):  
Ju-Sung Kim
Keyword(s):  
Physicochemical Properties ◽  
Nutrient Solution ◽  
Artificial Light ◽  
Cultivated Barley

scholarly journals Low-volume and thin-layer panoponics in intensive artificial-light culture of cucumber: basics and results of application

2021 ◽  
pp. 39-44
Author(s):  
O. R. Udalova ◽  
L. M. Anikina ◽  
G. V. Mirskaya ◽  
P. Yu. Kononchuk ◽  
G. G. Panova
Keyword(s):  
Thin Layer ◽  
Production Process ◽  
Nutrient Solution ◽  
Drip Irrigation ◽  
Dry Weight ◽  
High Tech ◽  
Leaf Water Content ◽  
Artificial Light ◽  
Positive Trend ◽  
Low Volume

Relevance. The year-round provision of the population of our country with fresh vegetable products remainsis relevant. The creation and widespread implementation of high-tech automated phytotechnological complexes based on innovative technologies for growing plants in intensive light culture, including the development of new-generation root-dwelling environments, low-volume and thin-layer analogs of soil and systems for providing plants with water and mineral nutrition elements, is one of the promising ways to solve this problem.The purpose. Assessment of the influence of root environment conditions on the production process of cucumber plants in intensive light culture is the aim of our work.Methods. The research was carried out under controlled conditions of intensive artificial-light culture, when growing a hybrid of cucumber Tristan F1 by using of low-volume and thin-layer analogs of soil with the supply of a nutrient solution to the plant roots through a slit capillary and by drip irrigation with the use of plant growing light equipment developed at Agrophysical Institute.Results. Evaluation of the influence of the conditions of the root environment - alow-volume analogue of the soil based on high-moor peat – agrophyte and a thin-layer analog of the soil based on a clay suspension with a feed of nutrient solution through a slit capillary, on the production process of cucumber plants showed that in comparison with the control – a low-volume analog of the soil-agrophyte with a feed of nutrient solution by drip irrigation, there is growth acceleration of the cucumber hybrid Tristan F1 in the form of a positive trend and reliable values; as well as a significant increase in the number of fruits by 38-43%, the weight of fruits by 52-53% from the plant; an increase in the accumulation of raw by 38-40% and dry weight by 27-32% by cucumber leaves; an increase in the leaf surface area by 38-40%, leaf water content by 7.3- 9.6%; a significant or positive trend increase in the content of calcium in cucumber fruits by 18-29%, magnesium by 20-29%, iron by 5-16%, vitamin C by 17-23%, while the content of heavy metals and nitrates does not exceed exceeded the MPC in all variants. Methods of growing plants on low-volume and thin - layer analogs of soil with the supply of a nutrient solution to the roots through a slit capillary can be recommended for any cultivation facilities in conditions of intensive light culture.

Structure-reactivity correlations in extended multi-porphyrinic architectures

2003 ◽  
Vol 07 (04) ◽  
pp. 270-281 ◽  
Author(s):  
Nathalie Solladié ◽  
Nicolas Aubert ◽  
Souhaila Bouatra ◽  
Cyril Bourgogne ◽  
Frédérique Bregier ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Spatial Orientation ◽  
Light Harvesting ◽  
Artificial Light ◽  
Recent Advances

In addition to controlling the structure of multi-chromophoric arrays, monitoring the spatial orientation of the chromophores in artificial light harvesting devices is a challenge of growing interest. We report in this article our recent advances in this field. It is expected that a better understanding of the physicochemical properties of rigid cofacial porphyrinic tweezers and an identification of the factors governing them will be crucial for the design and the elaboration of new nano-molecules endowed with original properties. Extended multi-porphyrinic architectures, polypeptides bearing pendant porphyrins have been synthesized as linear devices, and a star-like pentaporphyrin as an arborescent array. The structure and the original conformation of the latter confer to this system an unusual duality in its physicochemical properties.

scholarly journals Impact of Bio-Fertilizer or Nutrient Solution on Spinach (Spinacea oleracea) Growth and Yield in Some Province Soils of P.R. China

2018 ◽  
Vol 51 (2) ◽  
pp. 43-52 ◽  
Author(s):  
P.O. Ogbaji ◽  
J. Li ◽  
X. Xue ◽  
M.H. Shahrajabian ◽  
E.A. Egrinya
Keyword(s):  
Physicochemical Properties ◽  
Plant Height ◽  
Nutrient Solution ◽  
Growth Yield ◽  
Growth And Yield ◽  
Agronomic Characters ◽  
Ecological Zones ◽  
Spinacea Oleracea ◽  
Plant Emergence ◽  
Agro Ecological Zones

Abstract A study was conducted to assess the effects of a bio-fertilizer and an inorganic fertilizer on growth, yield of spinach vegetable, on four cultivated soils, representing different agro-ecological zones of Chengdu, Hunan, Xiaotangshan and Shaanxi. Three replicates soil samples mixed with bio-fertilizer 100 g per pot and nutrient solution (MgSO4, Ca(NO)2, KNO3) 633 ml based on container volume. Spinach seeded directly ten per pot, thinned to five watered to plant water requirement until maturity. RCBD of three replication used, data for growth, yield and other agronomic characters and soil physicochemical properties evaluated. Soil results showed substantial differences in physicochemical properties from the four agro-ecological zones (Ferrod Arenosol, Entisol, Aridisol and Vertisol). Plant emergence percent were Xiaotangshan (74.8%), Chengdu (74.5%), Hunan (72.4%) and Shaanxi (70.7%), plant height at six week, Xiaotangshan (17.8 cm), Hunan (17.1 cm), Shaanxi (16.8 cm) and Chengdu (16.1 cm) the least, number of leaves at six weeks were Xiaotangshan (21), Hunan (19) and (16) Shaanxi, leaf area Hunan (89.5 cm2), Shaanxi (83.7 cm2), Chengdu (79.4 cm2) and Xiaotangshan (78.1 cm2), dry biomass of 4.88, 4.35, 3.83 and 3.03 g obtained for Hunan, Chengdu, Shaanxi and Xiaotangshan, respectively. Percentage plant emergence based on soil layers were 0-25 cm (75.8%), 25-50 cm (75.3%), 50-75 cm (71.6%) and 75-100 cm (69.6%), respectively; highest plant emergence percentage were obtained from top soil layer of Hunan, treated with biofertilizer. Substantial differences were observed for plant height, biomass and other agronomic characters in all the soils. The results show that Hunan soil is the most suitable for cultivation of spinach under biofertilizer treatment, compared to other types. The study underpins the importance soil types and fertilizer evaluation for a sustainable vegetable production in China.

Preparation and characterisation of vanadium pentoxide supported rhodium catalyst

1988 ◽  
Vol 46 ◽  
pp. 946-947
Author(s):  
A. Legrouri
Keyword(s):  
Aqueous Solution ◽  
Thermal Decomposition ◽  
Physicochemical Properties ◽  
Surface Area ◽  
Vanadium Pentoxide ◽  
High Purity ◽  
Gas Adsorption ◽  
Rhodium Catalyst ◽  
Optical Methods ◽  
Reducible Oxides

The industrial importance of metal catalysts supported on reducible oxides has stimulated considerable interest during the last few years. This presentation reports on the study of the physicochemical properties of metallic rhodium supported on vanadium pentoxide (Rh/V2O5). Electron optical methods, in conjunction with other techniques, were used to characterise the catalyst before its use in the hydrogenolysis of butane; a reaction for which Rh metal is known to be among the most active catalysts.V2O5 powder was prepared by thermal decomposition of high purity ammonium metavanadate in air at 400 °C for 2 hours. Previous studies of the microstructure of this compound, by HREM, SEM and gas adsorption, showed it to be non— porous with a very low surface area of 6m2/g3. The metal loading of the catalyst used was lwt%Rh on V2Q5. It was prepared by wet impregnating the support with an aqueous solution of RhCI3.3H2O.

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