scholarly journals Application of Biological Nitrogen Fixation Cyanobacteria To Paddy Plant Cultivated Under Deep-Water Culture System

2020 ◽  
Vol 5 (2) ◽  
pp. 164-173
Author(s):  
Dian Hendrayanti ◽  
Iman Rusmana ◽  
Dwi Andreas Santosa ◽  
Hamim Hamim
Keyword(s):  
Deep Water ◽  
Culture System ◽  
Rice Field ◽  
Atmospheric Nitrogen ◽  
Water Culture ◽  
Hydroponic System ◽  
Success Stories ◽  
N Source ◽  
Open Question ◽  
Biological Nitrogen

 The Biological Nitrogen Fixing (BNF) cyanobacteria can reduce atmospheric nitrogen into ammonium. This ability makes BNF cyanobacteria a potential eco-friendly N-source for soil-planted pad-dy. Apart from a few success stories of BNF cyanobacteria applica-tion in the rice field, its role as an ammonium producer is still an open question. There is also a possibility that indeed cyanobacteria biomass which provides nitrogen through the biological decomposing process. This study aimed to analyze the influence of three strains BNF cyanobacteria on paddy grown in the Deep-Water Culture (DWC) hydroponic system. Yoshida Nutrient Solution was used as a growth medium with the application of 0, 45.7, and 91.4 gL-1 of ammonium nitrate (NH4NO3) with five replications. The result showed that inter-action between cyanobacteria and nitrogen significantly influenced the total nitrogen of paddy plant, but not the paddy plant height, the num-ber of tillers, and biomass. Cyanobacterial filaments were found most-ly attached to the paddy root rather than floated in the DWC system. Paddy treated with cyanobacteria had more lateral root than control. The result suggested that cyanobacteria support paddy growth indi-rectly through nitrogen deposition in plant tissue and root development. 

scholarly journals Analyzing hydroponic rack design for apartment house

2018 ◽  
Vol 7 (2.14) ◽  
pp. 128
Author(s):  
Mohd Hafiz Talib ◽  
Khairul Aidil Azlin Abd Rahman ◽  
Mohd Shahrizal Dollah
Keyword(s):  
Urban Area ◽  
Food Consumption ◽  
Culture System ◽  
Small Area ◽  
Modular System ◽  
Apartment House ◽  
Water Culture ◽  
Hydroponic System ◽  
Limited Space ◽  
Living Cost

This study analyze users who are living in condominium and apartment in an urban area to practice the farming activity. Almost 75% type of house in Malaysia is apartment. A major problem living in condominium and apartment is the limited space to do farming activity. To-day's users do not know where their food comes from and uncontrolled using pesticide among the farmers. Over 80% of food supplies were imported and local crops products were exported. About 65% from a person salary is for food consumption. The existing design of hydroponic system is not suitable for the current lifestyle needs. This help users to farm within a limited space in the urban area and create awareness the importance of planting their own food. Hydroponic system can reduce 40% of living cost for food. The compact rack system design has been proposed based on the functionality and practicality for crops planting in a small area using deep water culture system. The compact rack design using a simple system that can easy to assemble and disassemble that suit home interior. The result shows the hydroponic rack with modular system is suitable for the condominium and apartment area which are small and compact. 

scholarly journals Biogas digestates are not an effective nutrient solution for hydroponic tomato (Lycopersicon esculentum L.) production under a deep water culture system

Heliyon ◽  
2019 ◽  
Vol 5 (10) ◽  
pp. e02736 ◽  
Author(s):  
Hupenyu A. Mupambwa ◽  
Andreas S. Namwoonde ◽  
Gadaffi M. Liswaniso ◽  
Martha K. Hausiku ◽  
Balasubramani Ravindran
Keyword(s):  
Lycopersicon Esculentum ◽  
Nutrient Solution ◽  
Deep Water ◽  
Culture System ◽  
Water Culture

Hydroponic System - Solution Culture.

2021 ◽  
pp. 61-76
Author(s):  
Lynette Morgan
Keyword(s):  
Root System ◽  
Deep Water ◽  
Crop Production ◽  
Solution Culture ◽  
Water Culture ◽  
Hydroponic System ◽  
Culture Systems ◽  
Nutrient Film Technique ◽  
System Solution ◽  
Deep Flow Technique

Abstract This paper discusses about the solution culture or 'hydroculture' systems, which are methods of crop production which do not employ the use of substrates to contain the root system and hold moisture between irrigations. It includes NFT or the nutrient film technique, deep water culture/deep flow technique - float, raft or pond systems, aeroponics, aquaponics, organic solution culture, hydroponic fodder systems, and automation for solution culture systems.

Hydroponic System - Solution Culture.

2021 ◽  
pp. 61-76
Author(s):  
Lynette Morgan
Keyword(s):  
Root System ◽  
Deep Water ◽  
Crop Production ◽  
Solution Culture ◽  
Water Culture ◽  
Hydroponic System ◽  
Culture Systems ◽  
Nutrient Film Technique ◽  
System Solution ◽  
Deep Flow Technique

Abstract This paper discusses about the solution culture or 'hydroculture' systems, which are methods of crop production which do not employ the use of substrates to contain the root system and hold moisture between irrigations. It includes NFT or the nutrient film technique, deep water culture/deep flow technique - float, raft or pond systems, aeroponics, aquaponics, organic solution culture, hydroponic fodder systems, and automation for solution culture systems.

IoT-based Automated Greenhouse for Deep Water Culture Hydroponic System

2021 ◽  
Author(s):  
Maria C. Moreno ◽  
Oscar J. Suarez ◽  
Alda Pardo Garcia
Keyword(s):  
Deep Water ◽  
Water Culture ◽  
Hydroponic System

scholarly journals Effect of Azotobacter chroococcum on sugar beet and microbial activity of rhizosphere

2010 ◽  
pp. 37-46
Author(s):  
Janja Kuzevski ◽  
Nada Milosevic ◽  
Sasa Krstanovic ◽  
Zora Jelicic
Keyword(s):  
Sugar Beet ◽  
Soil Microorganisms ◽  
Vegetation Period ◽  
Mineral Fertilizers ◽  
Atmospheric Nitrogen ◽  
Root Yield ◽  
Almost All ◽  
Biological Nitrogen ◽  
Number Of Bacteria ◽  
Soil Dehydrogenase Activity

In sugar beet production, one of the most important factors that affect the yield, apart from genetic properties, is the use of mineral fertilizers. Considerate amounts of mineral fertilizers are used in sugar beet production. However, if agroecological conditions are not optimum, mineral fertilizers cannot be completely absorbed, which may lead to soil contamination. Therefore, research has been focusing on ways of using atmospheric nitrogen by means of nitrogen-fixing bacteria. Numerous researches have proved that one part of mineral fertilizers can be replaced by biological nitrogen. The aim of this research was to determine the effect of genotype, azotobacter and the amount of mineral fertilizers on the root yield of sugar beet and on the microbiological activity of the sugar beet rhizospheric soil. Three hybrids of sugar beet were used during the two years of the research. The seed of the hybrids was inoculated with three strains of azotobacter. Various amounts of NPK were used (0;30;60;90 kg/ha). At the end of the vegetation period, the following were determined: root yield, total number of bacteria, number of azotobacter, oligotrophic bacteria, ammonifiers, fungi, and actinomycetes in soil. Dehydrogenase activity was measured. The results were processed statistically (analysis of variance for factorial trials) and the effect of the factors was determined upon the expected mean square values. The yield was mainly affected by the amount of mineral fertilizers. However, the effect of mineral fertilizers was different with different inoculation treatments. The effect of the examined factors was dependant upon genotype, amount of mineral fertilizers, inoculation and the year of trials. The interaction between genotype, mineral fertilizers, inoculation and the year of trials was the factor that had the greatest effect on the number of almost all the examined soil microorganisms.

Iron-Only and Vanadium Nitrogenases: Fail-Safe Enzymes or Something More?

2020 ◽  
Vol 74 (1) ◽  
pp. 247-266 ◽  
Author(s):  
Caroline S. Harwood
Keyword(s):  
Microbial Community ◽  
Nitrogen Cycle ◽  
Active Sites ◽  
Atmospheric Nitrogen ◽  
Critical Importance ◽  
Community Interactions ◽  
Nitrogen Gas ◽  
Vanadium Nitrogenase ◽  
Fail Safe ◽  
Biological Nitrogen

The enzyme molybdenum nitrogenase converts atmospheric nitrogen gas to ammonia and is of critical importance for the cycling of nitrogen in the biosphere and for the sustainability of life. Alternative vanadium and iron-only nitrogenases that are homologous to molybdenum nitrogenases are also found in archaea and bacteria, but they have a different transition metal, either vanadium or iron, at their active sites. So far alternative nitrogenases have only been found in microbes that also have molybdenum nitrogenase. They are less widespread than molybdenum nitrogenase in bacteria and archaea, and they are less efficient. The presumption has been that alternative nitrogenases are fail-safe enzymes that are used in situations where molybdenum is limiting. Recent work indicates that vanadium nitrogenase may play a role in the global biological nitrogen cycle and iron-only nitrogenase may contribute products that shape microbial community interactions in nature.

scholarly journals Effects of Seeding Pattern and Cultivar on Productivity of Baby Spinach (Spinacia oleracea) Grown Hydroponically in Deep-Water Culture

Horticulturae ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 20 ◽  
Author(s):  
Daniel Janeczko ◽  
Michael Timmons
Keyword(s):  
Seed Germination ◽  
Deep Water ◽  
Spinacia Oleracea ◽  
Expanded Polystyrene ◽  
Fresh Weight ◽  
Water Culture ◽  
Canopy Density ◽  
Bench Scale

Baby spinach (Spinacia oleracea) was grown in a bench-scale deep-water culture (DWC) system in expanded polystyrene (EPS) plug trays. Two experiments were performed. In the first, different seeding patterns, [1-2-1-2…] or [3-0-3-0…] seeds per sequential cell, at the same overall density per tray, were compared to evaluate the potential of an EPS tray designed with fewer cells, but sown with more seeds per cell (to preserve canopy density). Using such a flat would lower growing substrate requirements. Seeding in the [3-0-3-0…] pattern reduced seed germination, but only by 5%. Harvested fresh weight was also less numerically in the [3-0-3-0…] pattern but not statistically. The second experiment observed cultivars Carmel, Seaside and Space grown concurrently. Carmel had the highest germination, nearly 100%, which was significantly greater than Seaside but not Space. Germination for Space was not significantly different from that of Seaside. Carmel also had the highest harvested fresh weight but was not significantly different from Space; both Carmel and Space produced significantly more harvested fresh weight than Seaside.

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