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solar greenhouse

Miroslava Rakocevic, Mariele Müller, Fabio Takeshi Matsunaga, Norman Neumaier, José Renato Bouças Farias, Alexandre Lima Nepomuceno, Renata Fuganti-Pagliarini
Drought-stress is one of the most severe environmental constraints for plant production. Under the environmental pressures, complex daily heliotropic adjustments of leaflet angles in soybean can help to reduce transpiration losses by diminishing the light interception (paraheliotropism), increase diurnal carbon gain in sparse canopies and reduce carbon gain in dense canopies by solar tracking (diaheliotropism). Studied plant materials were cultivar BR 16 and its genetically engineered isoline P58, ectopically overexpressing AtDREB1A, which is involved in abiotic stress responses...
August 17, 2018: Plant Journal: for Cell and Molecular Biology
Joan Manuel F Mendoza, Alejandro Gallego-Schmid, Ximena C Schmidt Rivera, Joan Rieradevall, Adisa Azapagic
The sustainability benefits of using solar cookers in developing countries have been analysed widely in the literature. However, the sustainability potential of solar cookers in developed economies has not been explored yet, which is the topic of this paper. Three types of solar cooker - box, panel and parabolic - were built as part of this research, using mostly (>70%) reused household materials. Their life cycle environmental and economic performance was analysed and compared to conventional microwaves...
August 9, 2018: Science of the Total Environment
Sarah-Jeanne Royer, Sara Ferrón, Samuel T Wilson, David M Karl
Mass production of plastics started nearly 70 years ago and the production rate is expected to double over the next two decades. While serving many applications because of their durability, stability and low cost, plastics have deleterious effects on the environment. Plastic is known to release a variety of chemicals during degradation, which has a negative impact on biota. Here, we show that the most commonly used plastics produce two greenhouse gases, methane and ethylene, when exposed to ambient solar radiation...
2018: PloS One
Aleksandra Bawiec, Katarzyna Pawęska, Krzysztof Pulikowski, Joanna Kajewska-Szkudlarek
The use of plants and natural processes for wastewater treatment is an issue that arouses interest among technologists and scientists around the world. The aim of the article was to analyze the influence of the air temperature and insolation on the removal of nitrate nitrogen from the wastewater treated in the hydroponic system, under greenhouse conditions. Samples of sewage for its quality tests were taken from a wastewater treatment plant (WWTP) located in the southwestern part of Poland. Data regarding daily sunshine duration and average daily air temperature values in selected periods of 2013-2016 come from a meteorological station located 30 km from WWTP...
2018: Water, Air, and Soil Pollution
Ewa Lipczynska-Kochany
Humic substances (HS), a highly transformed part of non-living natural organic matter (NOM), comprise up to 70% of the soil organic matter (SOM), 50-80% of dissolved organic matter (DOM) in surface water, and 25% of DOM in groundwater. They considerably contribute to climate change (CC) by generating greenhouse gases (GHG). On the other hand, CC affects HS, their structure and reactivity. HS important role in global warming has been recognized and extensively studied. However, much less attention has been paid so far to effects on the freshwater quality, which may result from the climate induced impact on HS, and HS interactions with contaminants in soil, surface water and groundwater...
November 1, 2018: Science of the Total Environment
Ji-Ji Chen, He Song, Wen-Chao Cao, Yi-Ran Wang, Jing-Guo Wang
To explore the sources of peak nitrous oxide (N2 O) flushes in solar greenhouse vegetable field, an experiment was conducted with two conventional vegetable soils under different initial volume fractions of oxygen (O2 ) (0%, 1%, 3%, 5%, and 10%). A robotized incubation system was employed to analyze the gas kinetics[O2 , N2 O, nitric oxide (NO), nitrogen (N2 ), and carbon dioxide (CO2 )] every 6 or 8 h and calculate the N2 O/(NO+N2 O+N2 ) index. Sodium chlorate (NaClO3 ) was used to inhibit the oxidation of NO2 - to further explore the relationship between N2 O and nitrite (NO2 - )...
August 8, 2018: Huan Jing Ke Xue= Huanjing Kexue
Lei Jia, Yi-Ni Pu, Shi-Jun Yang, Rong-Ming-Zhu Su, Zhi-Hao Qin, Mi Zhang
In order to identify CH4 and CO2 emission flux characteristics and their impact factors in the algal lake zone of Lake Taihu, CH4 and CO2 fluxes were observed by the improved closed chamber method in Meiliang Bay in Lake Taihu. The relationships between CH4 and CO2 flux and meteorological factors were analyzed. The results showed that CH4 and CO2 fluxes had obvious diurnal variations. The CH4 flux in the daytime was higher than that in the nighttime in spring; however, the CH4 flux in the nighttime was higher than that in the daytime in summer...
May 8, 2018: Huan Jing Ke Xue= Huanjing Kexue
Wilson Mendoza, Dominick Mendola, Jang Kim, Charles Yarish, Alyssa Velloze, B Greg Mitchell
This work developed a laboratory prototype methodology for cost-effective, water-sparing drip-irrigation of seaweeds, as a model for larger-scale, on-land commercial units, which we envision as semi-automated, inexpensive polyethylene sheet-covered bow-framed greenhouses with sloping plastic covered floors, water-collecting sumps, and pumped recycling of culture media into overhead low-pressure drip emitters. Water droplets form on the continually wetted interior plastic surfaces of these types of greenhouses scattering incoming solar radiation to illuminate around and within the vertically-stacked culture platforms...
2018: PloS One
Wan-Li Xiao, Zhe-Xin Wang, Feng-Zhi Wu, Xin-Gang Zhou
Currently, cucumber cultivation is mainly through monoculture, as continuous culture leads to the decrease of crop yield and soil quality. In order to improve soil quality to achieve continuous monocultures, soil physicochemical properties, microbial biomass, content of phenolic compounds, and the size of bacterial, fungal, ammonia-oxidizing bacteria (AOB), and Fusarium oxysporum were first evaluated in cucumber monoculture solar greenhouse. Soil improvement technology, including catch wheat (CW), calcium cyanamide disinfection (LN), and straw reactor technology (SR) during summer fallow period, was compared with conventional fallow (CK)...
June 11, 2018: Environmental Science and Pollution Research International
Titta Kotilainen, T Matthew Robson, Ricardo Hernández
Climate screens are typically used inside glass greenhouses to improve control of humidity and temperature, and thus reduce energy expenditure. Shade nets are more appropriate to use, either with or without polyethylene cladding, at locations less-reliant on climate control, but where protection against hail, wind and excessive solar radiation might be needed. In addition, insect screens and nets can be employed to hinder insect pests and other invertebrates entering either type of production environment, and to keep invertebrates used in pest management contained inside...
2018: PloS One
Sepehr Hamzehlouia, Shaffiq A Jaffer, Jamal Chaouki
Natural gas is a robust and environmentally friendlier alternative to oil resources for energy and chemicals production. However, gas is distributed globally within shales and hydrates, which are generally remote and difficult reserves to produce. The accessibility, transportation, and distribution, therefore, bring major capital costs. With today's low and foreseen low price of natural gas, conversion of natural gas to higher value-added chemicals is highly sought by industry. Dry reforming of methane (DRM) is a technology pathway to convert two critical greenhouse gas components, CH4 and CO2 , to syngas, a commodity chemical feedstock...
June 12, 2018: Scientific Reports
José Bazán, Joan Rieradevall, Xavier Gabarrell, Ian Vázquez-Rowe
Urban environments in Latin America must begin decarbonizing their activities to avoid increasing greenhouse gases (GHGs) emissions rates due to their reliance on fossil fuel-based energy to support economic growth. In this context, cities in Latin America have high potential to convert sunlight into energy. Hence, the main objective of this study was to determine the potential of electricity self-sufficiency production and mitigation of GHG emissions in three medium-sized cities in Peru through the revalorization of underutilized rooftop areas in urban environments...
May 1, 2018: Science of the Total Environment
Fehmi Gorkem Uctug, Adisa Azapagic
Solar water heating (SWH) systems could help reduce environmental impacts from energy use but their performance and impacts depend on the climate. This paper considers how these vary for residential SWH across four different climatic regions in Turkey, ranging from hot to cold climates. Life cycle assessment was used for these purposes. The results suggest that in the hotter regions, the impacts of SWH are 1.5-2 times lower than those of natural gas boilers. A similar trend was observed in the two colder regions except for acidification, which was four times higher than that of the boiler...
May 1, 2018: Science of the Total Environment
Chris K Folland, Olivier Boucher, Andrew Colman, David E Parker
The time series of monthly global mean surface temperature (GST) since 1891 is successfully reconstructed from known natural and anthropogenic forcing factors, including internal climate variability, using a multiple regression technique. Comparisons are made with the performance of 40 CMIP5 models in predicting GST. The relative contributions of the various forcing factors to GST changes vary in time, but most of the warming since 1891 is found to be attributable to the net influence of increasing greenhouse gases and anthropogenic aerosols...
June 2018: Science Advances
Diego Moya, Juan Paredes, Prasad Kaparaju
RETScreen presents a proven focused methodology on pre-feasibility studies. Although this tool has been used to carry out a number of pre-feasibility studies of solar, wind, and hydropower projects; that is not the case for geothermal developments. This method paper proposes a systematic methodology to cover all the necessary inputs of the RETScreen-International Geothermal Project Model. As case study, geothermal power plant developments in the Ecuadorian context were analysed by RETScreen-International Geothermal Project Model...
2018: MethodsX
Hossein Yadegari, Xueliang Sun
Releasing greenhouse gases into the atmosphere because of widespread use of fossil fuels by humankind has resulted in raising the earth's temperature during the past few decades. Known as global warming, increasing the earth's temperature may in turn endanger civilization on the earth by starting a cycle of environmental changes including climate change and sea level rise. Therefore, replacing fossil fuels with more sustainable energy resources has been considered as one of the main strategies to tackle the global warming crisis...
June 19, 2018: Accounts of Chemical Research
Reinhard Prestele, Annette L Hirsch, Edouard L Davin, Sonia I Seneviratne, Peter H Verburg
Conservation agriculture (CA) is widely promoted as a sustainable agricultural management strategy with the potential to alleviate some of the adverse effects of modern, industrial agriculture such as large-scale soil erosion, nutrient leaching and overexploitation of water resources. Moreover, agricultural land managed under CA is proposed to contribute to climate change mitigation and adaptation through reduced emission of greenhouse gases, increased solar radiation reflection, and the sustainable use of soil and water resources...
May 10, 2018: Global Change Biology
Ke Bin Yang, Fan Zhi Meng, Xian Feng Guo
Aiming at the problem of the acute shortage of CO2 in winter production of cut Anthurium andraeanum in solar greenhouse, the effect of CO2 fertilization on photosynthetic characteristics and growth performance of A. andraeanum 'Fire' was investigated. Three treatments with different concentrations of CO2 were designed, i.e., 700, 1000 and 1300 Μmol·mol-1 , with receiving no extra CO2 as the control. The results showed that for the CO2 -fertilized plants, the photosynthetic rate, intercellular CO2 concentration and water use efficiency were significantly greater than those in the control plants after CO2 fertilization for 60 days, and the largest increase range was observed in the 1000 Μmol·mol-1 CO2 treatment, whereas the stomata conductance was significantly reduced compared with the control...
June 18, 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
Leiming He, Kaidi Cui, Yufei Song, Zhengqun Zhang, Beixing Li, Wei Mu, Feng Liu
BACKGROUND: Gray mold is a ubiquitous destructive plant disease found worldwide. To avoid the shortcomings of conventional spraying systems for controlling this disease, such as high selection pressure on Botrytis cinerea for resistance and fungicide waste resulting from spray drift, a precisely targeted application strategy of dipping young cucumber fruit in a mixture of fungicide and forchlorfenuron (plant growth regulator, PGR) during the bloom period to control cucumber gray mold was developed in the current study...
April 27, 2018: Pest Management Science
Lobna Hajji-Hedfi, Emna Rebai, Asma Larayedh, Hajer Regaieg, Najet Horrigue-Raouani
Pot and greenhouse trials were conducted for the management of root-knot nematode, Meloidogyne javanica, infestation in tomato. Growth parameters, gall index, soil, and root nematode populations were measured to assess the effect of a novel bio-pesticide (Dazitol®), made from mustard oil and oleoresin of Capsicum, on plant growth and nematode reproduction. Data generated within the pot experiment showed that the tested bio-pesticide did not improve plant growth, but it reduced significantly root-knot nematode damage resulting in a decrease in gall index and root (91%) and soil (62%) population of M...
June 2018: Environmental Science and Pollution Research International
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