Hydroponics production function provides technically efficient production system in the globe. Technological development is changing the shape of production systems all over the world. A Cobb Douglas ...type hydroponics production system was developed for estimation of production elasticity of hydroponics in Pakistan. Return to scale was calculated by adding all betas, which indicate the stage of production function of hydroponics system. Domestic resource cost indicates relative efficiency of hydroponics products in domestic resource use. Results indicated that labor used in production of hydroponics products and supply chain management of hydroponics products both in the domestic market and in regional markets has significantly affecting total value product of the hydroponics. Return to scale value of 1.77 indicated that the product function is positive and increasing return to scale in TVP in relation to increase in input cost. The value of (DRC<1) indicated that Pakistan has comparative advantage in the efficiently utilizing domestic resources in the production of hydroponics products.
Common Media Used in Hydroponics Morgan Pinkerton; Brianna Whitman; Hannah Wooten ...
EDIS,
08/2022, Letnik:
2022, Številka:
4
Journal Article
Recenzirano
Odprti dostop
Hydroponics is a method of growing plants without using soil. In hydroponics, plants can be grown either directly in a nutrient solution (water-culture) or in an inert media (media-culture). In ...media-culture, the type of media is critical to the success of plant production. Designed for hydroponic beginners, this new 5-page publication of the UF/IFAS Environmental Horticulture Department will cover the basic properties of media and specifically discuss media commonly used in hydroponics. Written by Morgan Pinkerton, Brianna Whitman, Hannah Wooten, and Celina Gomez. https://edis.ifas.ufl.edu/ep623
The microgravity conditions experienced in space prevent the proper distribution of water throughout root modules of plant growth hardware, and the lack of convective mixing and buoyancy reduces gas ...exchange. To overcome this problem, cultivation technologies should be designed that take advantage of the unique traits of the spaceflight environment instead of attempting to recreate Earth-like conditions. Such technologies should be adaptable to both the microgravity of spaceflight and the low gravity environments of the lunar and Martian surface. Current space plant cultivation relies on traditional terrestrial practices and uses porous substrates that are nutrient poor and difficult to regenerate, and does not consider the dominance of surface- or thermal gradient-controlled rather than gravity-controlled water flow in space as a potential beneficial property. We propose systems that control water dispensation and removal by parallel but independent means in a soil-free cultivation system that is adaptable and expandable to crops of varying sizes and shallow or deep rooting plants. Water dispensation and removal in a substrate-free hydroponic system can be achieved through the misting of nutrient solutions combined with special root module geometry and temperature gradients. The use of hydrogels as substrate, and a means of providing required nutrients and water for plant cultivation in space, can aid in the transition to low-gravity systems by eventual incorporation of on-site regolith to establish Earth-like soil.
Aquaponics, a combination of fish farming and soilless plant farming, is growing in popularity and gaining attention as an important and potentially more sustainable method of food production. The ...aim of this study was to document and analyze the production methods, experiences, motivations, and demographics of aquaponics practitioners in the United States (US) and internationally. The survey was distributed online using a chain sampling method that relied on referrals from initial respondents, with 809 respondents meeting the inclusion criteria. The majority of respondents were from the US (80%), male (78%), and had at least a high school degree (91%). The mean age of respondents was 47±13 years old. Most respondents (52%) had three years or less of aquaponics experience. Respondents typically raised tilapia or ornamental fish and a variety of leafy green vegetables, herbs, and fruiting crops. Respondents were most often motivated to become involved in aquaponics to grow their own food, for environmental sustainability reasons, and for personal health reasons. Many respondents employed more than one method to raise crops, and used alternative or environmentally sustainable sources of energy, water, and fish feed. In general, our findings suggest that aquaponics is a dynamic and rapidly growing field with participants who are actively experimenting with and adopting new technologies. Additional research and outreach is needed to evaluate and communicate best practices within the field. This survey is the first large-scale effort to track aquaponics in the US and provides information that can better inform policy, research, and education efforts regarding aquaponics as it matures and possibly evolves into a mainstream form of agriculture.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
Abstract Agricultural management using technologies that help farmers increase productivity and reduce production costs must be promoted to ensure agricultural sustainability. The objective of the ...study was to achieve the pH effect of growth solution, chemical treatment, use of osmoprotector additive and mineral nitrate presence, on the activity of growth promoting bacteria, Azospirillum brasilense, and its effects on the physiological quality of seeds and wheat seedling growth. The first experiment evaluated the physiological quality of seeds and the second experiment was divided into four, evaluating the growth of wheat seedling in a hydroponic system. The experiments were prolonged in a very randomized design, with four replications. The physiological quality of the seeds was evaluated by germination tests, first germination count, length of the shoot and root and dry mass of the shoot and root. Initial growth was evaluated by quantifying the dry mass of the leaf shoot and root and the root system intervals. The pH of the solution and the presence of nitrogen did not influence the effects of inoculation of the A. brasilense bacteria. With the use of chemical treatment and osmoprotective additive, A. brasilense had no effect on the growth of wheat seedlings.
Resumo A gestão agrícola utilizando tecnologias que ajudem os agricultores a aumentar a produtividade e reduzir os custos de produção deve ser promovida para garantir a sustentabilidade agrícola. O objetivo desta pesquisa foi avaliar o efeito do pH da solução de imersão, tratamento químico, uso de aditivo osmoprotetor e presença de nitrogênio mineral, sobre a atividade da bactéria promotora de crescimento, Azospirillum brasilense, e seus efeitos sobre a qualidade fisiológica de sementes e crescimento de plântulas de trigo. O primeiro experimento avaliou a qualidade fisiológica de sementes e o segundo experimento foi dividido em quatro, avaliando o crescimento de mudas de trigo em sistema hidropônico. Os experimentos foram conduzidos em delineamento inteiramente casualizado, com quatro repetições. A qualidade fisiológica das sementes foi avaliada pelos testes de germinação, primeira contagem de germinação, comprimento da parte aérea e da raiz e massa seca da parte aérea e da raiz. O crescimento inicial foi avaliado pela quantificação da massa seca da parte foliar aérea e da raiz e parâmetros do sistema radicular. O pH da solução e a presença de nitrogênio não influenciaram os efeitos da inoculação da bactéria A. brasilense. Com o uso de tratamento químico e aditivo osmoprotetor, A. brasilense não teve efeito sobre o crescimento de plântulas de trigo.
As triclosan is used extensively as an antimicrobial agent, it inevitably enters agroecosystems, when sewage and treated wastewater are applied to agricultural fields. As a result, triclosan can be ...accumulated into crops and vegetables. Currently, limited information is available on the metabolism of triclosan in vegetables. In this study, the fate of 14C-triclosan in celery under a hydroponic system was investigated in a 30-day laboratory test. Most (97.7 %) of the 14C-triclosan accumulated in celery. The bioconcentration factors of triclosan were up to 3140 L kg−1 at day 30. The concentration of 14C-triclosan in roots (17.8 mg kg−1) was 57- and 127-fold higher than that in stems (0.31 mg kg−1) and leaves (0.14 mg kg−1), respectively, at day 30, suggesting a higher accumulation of triclosan in celery roots and negligible transport to stems and leaves. Moreover, triclosan, as well as its eight metabolites, was detected and identified in celery tissues and the growth medium using 14C-labelling and LC-Q-TOF-MS analysis methods. Phase I metabolites in the growth medium were from hydroxylation, dechlorination, nitration, and nitrosylation. Phase II metabolism was the major pathway in celery tissues. Monosaccharide, disaccharide, and sulfate conjugates of triclosan were putatively identified. The results represent an important step toward a better evaluation of the behavior of triclosan in vegetables, with notable implications for environmental and human risk assessments of triclosan.
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•Triclosan was accumulated >90 % in celery in hydroponics.•The amount in the roots was significantly more than that in celery stems and leaves.•Main metabolites included sulfate- and glycosylated triclosan in celery tissues.•Nitrated and nitrosylated triclosan were first time identified in the medium.•Metabolic pathway of triclosan in a hydroponics-celery system was proposed.
This community service activity was carried out with the aim of introducing and implementing a hydroponic plant system in Kalitengah Village through training activities. This was due to the potential ...that Kalitengah Village had, namely the enthusiasm of the Kalitengah Village community, especially the PKK group, for planting activities. The limited land of each resident's house was also the reason why hydroponic planting activities could be carried out. The method of this activity was socialization and training. The socialization was carried out as a method for delivering material about hydroponics, while the training was carried out as a method for practicing hydroponic plant nurseries, one of which was green lettuce. The results of this activity were seen through indicators of activity success. In general, this activity was attended by 60% of the total invitees. The participants took part in this activity with a high level of enthusiasm from the start of delivering the material to nursery practice. Through this training activity, the people of Kalitengah Village could immediately plant hydroponic plants without supervision from the KKN group so that this activity had a sustainable value.
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