Pyrolysis is an effective method for treating of livestock and poultry manure developed in recent years. It can completely decompose pathogens and antibiotics, stabilize heavy metals, and enrich ...phosphorus (P) in biochar. To elucidate the P migration mechanism under different pig manure pyrolysis temperatures, sequential fractionation, solution 31P nuclear magnetic resonance, X-ray photoelectron spectroscopy, X-ray diffraction, and K-edge X-ray absorption near-edge structure techniques were used to analyze the P species in pig manure biochar (PMB). The results indicated that most of the organic P in the pig manure was converted to inorganic P during pyrolysis. Moreover, the transformation to different P groups pathways was clarified. The phase transition from amorphous to crystalline calcium phosphate was promoted when the temperature was above 600 °C. The content of P extracted by hydrochloric acid, which was the long-term available P for plant uptake, increased significantly. PMB pyrolyzed at 600 °C can be used as a highly effective substitute for P source. It provides the necessary P species (e.g. water-soluble P.) and metal elements for the growth of water spinach plants, and which are slow-release comparing with the Hogland nutrient solution.
Display omitted
•Preparation of pig manure biochar via pyrolysis is an important way to quickly recover P.•As pyrolysis temperature increased, abundance of calcium phosphate and long-term available P for plants increased.•Pyrolysis at 600 ℃ reduces P loss by converting biochar into stable, slow-release nutrient source.•P and other elements leached from 600°C biochar can be absorbed by plants in hydroponics, supporting water spinach growth.
SMK Negeri 1 Sidoarjo aims to create an automated hydroponic greenhouse system with IoT technology. Limited knowledge and costs hinder their progress. However, the Audio Video Engineering Department ...seeks assistance to achieve the program's goals by upgrading their knowledge and skills in automation. The Service Learning in Computer Engineering (SLiCE) program focuses on introducing and implementing automation and IoT technology in greenhouses. The community service project starts with surveys and discussions involving the principal and teachers. It then proceeds to analyze the needs and develop a hydroponic and IoT automation system. Training is provided for students and teachers of SMK Negeri 1 Sidoarjo. The ESP32 microcontroller enables remote monitoring and automatic control of nutrient levels and water pH, ensuring optimal plant growth. The outcome is a real-time hydroponic automation system capable of monitoring pH, nutrient PPM, and controlling nutrient addition through a website. After training, 87.9% of students reported improved comprehension of IoT and its implementation.
Triclosan is a widely used biocide against microorganisms and is ubiquitously distributed in the environment. Triclosan can be accumulated into plants from soil and hydroponic media. However, little ...information is currently available on the comparative fate of triclosan in plants under soil and hydroponics cultivation conditions and factors governing uptake. Therefore, this study was designed to comparatively elucidate the uptake mechanism of 14C-triclosan in youdonger (Brassica campestris subsp. Chinensis var. communis) grown under different soils and hydroponics and clarify dominant uptake factors. Results showed that 77.2% of 14C were accumulated in youdonger grown in a hydroponic system, while only 1.24%–2.33% were accumulated in the two soil-planting systems. In addition, the bioconcentration factor (BCF) of 14C-triclosan in soil-plant systems was approximately 400-fold smaller than that in the hydroponics. In the soil-planting system, a strong linear correlation was found between concentrations of triclosan in soil pore water and youdonger plant (R2 > 0.85, p < 0.01) at different incubation times. Therefore, triclosan in pore water might be a good indicator to estimate its accumulation in plants and is significantly affected by soil pH, clay, and organic matter contents. The estimated average dietary intakes of triclosan for youdonger grown in hydroponic and soil-planting systems were estimated to be 1.31 ng day−1 kg−1 and 0.05–0.12 ng day−1 kg−1, respectively, much lower than the acceptable dietary intakes of triclosan (83 μg day−1 kg−1), indicating no significant human health risks from youdonger consumption. This study provided insights into uptake routes of triclosan into youdonger plants from both soil and hydroponic systems, bioavailability of triclosan in different soils, and further assessment of human exposure to triclosan from youdonger.
Display omitted
•The BCF of triclosan in hydroponics was nearly 400 times that in soil-plant system.•The free triclosan was a crucial factor on uptake into the vegetable.•Triclosan in soil pore water was affected by soil pH, clay and OM.•No appreciable health risk to human via the consumption of the vegetable.
Plant cultivation is a key aspect of future long-distance space missions, and the creation of an efficient food system will not be possible without it. The production of fertilizer in space is based ...on the recovery of water and nutrients from wastewater, such as urine and grey water. In this study, the fertilizer production process was conducted in an aerobic, activated sludge reactor, where nitrification and the process of carbon removal take place. Treated streams have three potential factors that could affect the plants growth in a hydroponic system (anionic surfactants, nutrients deficiencies, high salinity). The effect of these factors was examined for two hydroponic configurations. Their influence on lettuce yield, quality parameters and stress response were investigated and compared to the control cultivation. The results showed that the main cause of a decrease (up to 24%) in the yield productivity of plants grown on nitrified urine and grey water is oxidative stress originated from a deficiency of elements, not from used anionic surfactant. Enrichment with nutrients resulted in the restoration of proper protein synthesis and an increase in the activity of antioxidant enzymes, which was positively reflected in the qualitative and quantitative parameters of the enriched cultivation (fresh leaves mass equal to 103% of the control). Results also show that Sodium Methyl Cocoyl Taurate (SMCT) surfactant itself after biological treatment used in plant cultivation has no negative effects reflected in lettuce yield or quality.
•It is possible to produce fertilizer from greywater and urine via aerobic process.•Aerobic process enables sufficient surfactant removal from grey water (av. 93%).•Nutrients deficiencies through oxidative stress caused yield decline (up to 24%).•Supplementation eliminates stress and increase lettuce production and quality.
•Scientific advances on vegetable quality in controlled environments are reviewed.•Genetic and grafting effects on quality are critically examined.•Key microclimate factors influential on quality are ...discussed.•Improving quality by nutrient management and biofortification is feasible.•Innovative management practices and future research warranted are highlighted.
During the last decades, food security has become a vital global concern driven by projections of population increase and exacerbated by the impending pressure of climate change on agriculture. Vegetable crops represent a fundamental ingredient of human diet due to their high nutritional value and bioactive content and could serve towards improving food security and nutritional quality, especially when managed under highly intensified cropping systems in controlled environments. Greenhouse and indoor growing modules not only allow for significantly higher yields compared to open field cropping systems, but also they can facilitate out of season production and substantial manipulation of the chemical composition and bioactive profile of the final product. The present work provides an updated critical overview of scientific advances regarding genotype and microclimate effects on the quality of greenhouse crops. In this context, innovative crop management practices are discussed, including management of the nutrient solution, biofortification and application of plant biostimulants. The review concludes by proposing future research pathways towards enhancing product quality of greenhouse vegetables.
The present study focused on the performance of the FDFO process to achieve simultaneous water reuse from wastewater and production of nutrient solution for hydroponic application. Bio-methane ...potential (BMP) measurements were firstly carried out to determine the effect of osmotic concentration of wastewater achieved in the FDFO process on the anaerobic activity. Results showed that 95% water recovery from the FDFO process is the optimum value for further AnMBR treatment. Nine different fertilizers were then tested based on their FO performance (i.e. water flux, water recovery and reverse salt flux) and final nutrient concentration. From this initial screening, ammonium phosphate monobasic (MAP), ammonium sulfate (SOA) and mono-potassium phosphate were selected for long term experiments to investigate the maximum water recovery achievable. After the experiments, hydraulic membrane cleaning was performed to assess the water flux recovery. SOA showed the highest water recovery rate, up to 76% while KH2PO4 showed the highest water flux recovery, up to 75% and finally MAP showed the lowest final nutrient concentration. However, substantial dilution was still necessary to comply with the standards for fertigation even if the recovery rate was increased.
Display omitted
•The performance of FDFO process using wastewater as feed solution was investigated.•The optimum water recovery to achieve in FDFO for post-AnMBR treatment was 95%.•Screening of fertilizers included water flux, RSF and final NPK concentrations.•MAP, SOA and KH2PO4 fertilizers were finally selected for long-term operation.•High water recovery can be achieved but final diluted DS still required dilution.
Abstract Nutrient solution is one of the most essential factors in influencing the production, yield and quality of plants hydroponically. This study aimed to obtain the best concentration of AB Mix ...nutrients and foliar fertilizer, as well as their combination on the growth and yield of pakcoy in the Floating Hydroponic System. This research was carried out at the Experimental Garden of the Faculty of Agriculture, Universitas Syiah Kuala, Banda Aceh from February to March 2023. This study used a 3 x 3 factorial RCBD with two factors. The first factor was the AB Mix concentration (800, 1000, and 1200 ppm), and the second factor was foliar fertilizer concentration (0, 250 and 500 ppm). The AB Mix concentration had a very significant effect on the total and consumption part wet weight, and also it had a significant effect on the number, length and width of leaf at 4 WAP. The foliar fertilizer concentration had a very significant effect on total and consumption part wet weight, had a significant effect on plant height at 4 WAP. The best growth and yield of pakcoy plants was obtained with the combination of 1200 ppm AB Mix nutrient concentrations and 250 ppm foliar fertilizer concentration.
PDF
