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Evapotranspiration irrigation

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https://www.readbyqxmd.com/read/28321518/identification-and-characterization-of-durum-wheat-micrornas-in-leaf-and-root-tissues
#1
Veronica Fileccia, Edoardo Bertolini, Paolo Ruisi, Dario Giambalvo, Alfonso Salvatore Frenda, Gina Cannarozzi, Zerihun Tadele, Cristina Crosatti, Federico Martinelli
MicroRNAs are a class of post-transcriptional regulators of plant developmental and physiological processes and responses to environmental stresses. Here, we present the study regarding the annotation and characterization of MIR genes conducted in durum wheat. We characterized the miRNAome of leaf and root tissues at tillering stage under two environmental conditions: irrigated with 100% (control) and 55% of evapotranspiration (early water stress). In total, 90 microRNAs were identified, of which 32 were classified as putative novel and species-specific miRNAs...
March 20, 2017: Functional & Integrative Genomics
https://www.readbyqxmd.com/read/28303146/an-assessment-of-genetic-diversity-and-drought-tolerance-in-argan-tree-argania-spinosa-populations-potential-for-the-development-of-improved-drought-tolerance
#2
Abdelghani Chakhchar, Matthew Haworth, Cherkaoui El Modafar, Marco Lauteri, Claudia Mattioni, Said Wahbi, Mauro Centritto
The argan tree (Argania spinosa) occurs in a restricted area of Southwestern Morocco characterized by low water availability and high evapotranspirative demand. Despite the adaptation of the argan tree to drought stress, the extent of the argan forest has declined markedly due to increased aridity, land use changes and the expansion of olive cultivation. The oil of the argan seed is used for cooking and as the basis for numerous cosmetics. The identification of argan tree varieties with enhanced drought tolerance may minimize the economic losses associated with the decline of the argan forest and constrain the spread of desertification...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28277076/carbon-dioxide-emission-in-relation-with-irrigation-and-organic-amendments-from-a-sweet-corn-field
#3
Ali Fares, Adam Bensley, Haimanote Bayabil, Ripendra Awal, Samira Fares, Hector Valenzuela, Farhat Abbas
Soil moisture and organic matter level affects soil respiration and microbial activities, which in turn impact greenhouse gas (GHG) emissions. This study was conducted to evaluate the effect of irrigation levels (75% [deficit], 100% [full], and 125% [excess] of reference crop evapotranspiration requirements), and organic amendments (OA) type (chicken manure [CM] and bone meal [BM]) and OA application rates (0,168, 336 and 672 kg total N ha(-1)) on (i) soil physical properties (bulk density, organic matter content and soil moisture content) and (ii) soil carbon dioxide (CO2) emissions from a highly weathered tropical Hawai'ian soil...
March 3, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28258753/spatial-and-temporal-evolution-of-climatic-factors-and-its-impacts-on-potential-evapotranspiration-in-loess-plateau-of-northern-shaanxi-china
#4
C Li, P T Wu, X L Li, T W Zhou, S K Sun, Y B Wang, X B Luan, X Yu
Agriculture is very sensitive to climate change, and correct forecasting of climate change is a great help to accurate allocation of irrigation water. The use of irrigation water is influenced by crop water demand and precipitation. Potential evapotranspiration (ET0) is a measure of the ability of the atmosphere to remove water from the surface through the processes of evaporation and transpiration, assuming no control on water supply. It plays an important role in assessing crop water requirements, regional dry-wet conditions, and other factors of water resource management...
March 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28220874/modeling-contribution-of-shallow-groundwater-to-evapotranspiration-and-yield-of-maize-in-an-arid-area
#5
Xiaoyu Gao, Zailin Huo, Zhongyi Qu, Xu Xu, Guanhua Huang, Tammo S Steenhuis
Capillary rise from shallow groundwater can decrease the need for irrigation water. However, simple techniques do not exist to quantify the contribution of capillary flux to crop water use. In this study we develop the Agricultural Water Productivity Model for Shallow Groundwater (AWPM-SG) for calculating capillary fluxes from shallow groundwater using readily available data. The model combines an analytical solution of upward flux from groundwater with the EPIC crop growth model. AWPM-SG was calibrated and validated with 2-year lysimetric experiment with maize...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28158204/atmospheric-co2-concentration-effects-on-rice-water-use-and-biomass-production
#6
Uttam Kumar, William Paul Quick, Marilou Barrios, Pompe C Sta Cruz, Michael Dingkuhn
Numerous studies have addressed effects of rising atmospheric CO2 concentration on rice biomass production and yield but effects on crop water use are less well understood. Irrigated rice evapotranspiration (ET) is composed of floodwater evaporation and canopy transpiration. Crop coefficient Kc (ET over potential ET, or ETo) is crop specific according to FAO, but may decrease as CO2 concentration rises. A sunlit growth chamber experiment was conducted in the Philippines, exposing 1.44-m2 canopies of IR72 rice to four constant CO2 levels (195, 390, 780 and 1560 ppmv)...
2017: PloS One
https://www.readbyqxmd.com/read/28069301/future-water-availability-in-the-largest-freshwater-mediterranean-lake-is-at-great-risk-as-evidenced-from-simulations-with-the-swat-model
#7
Tuba Bucak, Dennis Trolle, Hans Estrup Andersen, Hans Thodsen, Şeyda Erdoğan, Eti E Levi, Nur Filiz, Erik Jeppesen, Meryem Beklioğlu
Inter- and intra-annual water level fluctuations and changes in water flow regime are intrinsic characteristics of Mediterranean lakes. Additionally, considering climate change projections for the water-limited Mediterranean region, increased air temperatures and decreased precipitation are anticipated, leading to dramatic declines in lake water levels as well as severe water scarcity problems. The study site, Lake Beyşehir, the largest freshwater lake in the Mediterranean basin, is - like other Mediterranean lakes - threatened by climatic changes and over-abstraction of water for irrigated crop farming...
January 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28004823/paclobutrazol-induces-tolerance-in-tomato-to-deficit-irrigation-through-diversified-effects-on-plant-morphology-physiology-and-metabolism
#8
Sikander Pal, Jiangsan Zhao, Asif Khan, Narendra Singh Yadav, Albert Batushansky, Simon Barak, Boris Rewald, Aaron Fait, Naftali Lazarovitch, Shimon Rachmilevitch
Dwindling water resources combined with meeting the demands for food security require maximizing water use efficiency (WUE) both in rainfed and irrigated agriculture. In this regard, deficit irrigation (DI), defined as the administration of water below full crop-water requirements (evapotranspiration), is a valuable practice to contain irrigation water use. In this study, the mechanism of paclobutrazol (Pbz)-mediated improvement in tolerance to water deficit in tomato was thoroughly investigated. Tomato plants were subjected to normal irrigated and deficit irrigated conditions plus Pbz application (0...
December 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27951494/the-long-term-resistance-mechanisms-critical-irrigation-threshold-and-relief-capacity-shown-by-eugenia-myrtifolia-plants-in-response-to-saline-reclaimed-water
#9
José Ramón Acosta-Motos, José Antonio Hernández, Sara Álvarez, Gregorio Barba-Espín, María Jesús Sánchez-Blanco
Salts present in irrigation water are serious problems for commercial horticulture, particularly in semi-arid regions. Reclaimed water (RW) typically contains, among others elements, high levels of salts, boron and heavy metal. Phytotoxic ion accumulation in the substrate has been linked to different electric conductivities of the treatments. Based on these premises, we studied the long-term effect of three reclaimed water treatments with different saline concentrations on Eugenia myrtifolia plants. We also looked at the ability of these plants to recover when no drainage was applied...
December 5, 2016: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/27916300/seasonal-induced-changes-in-spinach-rhizosphere-microbial-community-structure-with-varying-salinity-and-drought
#10
A Mark Ibekwe, Selda Ors, Jorge F S Ferreira, Xuan Liu, Donald L Suarez
Salinity is a common problem under irrigated agriculture, especially in low rainfall and high evaporative demand areas of southwestern United States and other semi-arid regions around the world. However, studies on salinity effects on soil microbial communities are relatively few while the effects of irrigation-induced salinity on soil chemical and physical properties and plant growth are well documented. In this study, we examined the effects of salinity, temperature, and temporal variability on soil and rhizosphere microbial communities in sand tanks irrigated with prepared solutions designed to simulate saline wastewater...
February 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/27869671/the-evolution-of-total-phenolic-compounds-and-antioxidant-activities-during-ripening-of-grapes-vitis-vinifera-l-cv-tempranillo-grown-in-semiarid-region-effects-of-cluster-thinning-and-water-deficit
#11
Inmaculada Garrido, David Uriarte, Marcos Hernández, José Luis Llerena, María Esperanza Valdés, Francisco Espinosa
A study was made of how water status (rainfed vs. irrigated) and crop load (no cluster thinning vs. cluster thinning) can together affect the grapes of Vitis vinifera cv. Tempranillo vines growing in a semiarid zone of Extremadura (Spain). The grapes were monitored at different stages of ripening, measuring the peroxidase (POX) and superoxide dismutase (SOD) antioxidant activities and the phenolic content (flavonoids and phenylpropanoids), together with other parameters. The irrigation regime was adjusted to provide 100% of crop evapotranspiration (ETc)...
November 17, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27810303/surface-energy-balance-of-an-extensive-green-roof-as-quantified-by-full-year-eddy-covariance-measurements
#12
Jannik Heusinger, Stephan Weber
Green roofs are discussed as a promising type of green infrastructure to lower heat stress in cities. In order to enhance evaporative cooling, green roofs should ideally have similar Bowen ratio (β=sensible heat flux/latent heat flux) characteristics such as rural sites, especially during summer periods with high air temperatures. We use the eddy-covariance (EC) method to quantify the energy balance of an 8600m(2) extensive, non-irrigated green roof at the Berlin Brandenburg Airport, Germany over a full annual cycle...
January 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/27796568/response-of-water-deficit-regime-and-soil-amelioration-on-evapotranspiration-loss-and-water-use-efficiency-of-maize-zea-mays-l-in-subtropical-northeastern-himalayas
#13
M A Marwein, B U Choudhury, D Chakraborty, M Kumar, A Das, D J Rajkhowa
Rainfed maize production in the hilly ecosystem of Northeastern Himalayas often suffers from moisture and soil acidity induced abiotic stresses. The present study measured evapotranspiration loss (ETc) of maize crop under controlled condition (pot experiment) of water deficit (W25-25 % and W50-50 % of field capacity soil moistures) and well watered (W100 = 100 % of field capacity (FC)) regimes in strong acid soils (pH = 4.3) of the Northeastern Himalayan Region of India. The response of soil ameliorants (lime) and phosphorus (P) nutrition under differential water regimes on ETc losses and water use efficiency was also studied...
October 29, 2016: International Journal of Biometeorology
https://www.readbyqxmd.com/read/27790237/drought-tolerant-corn-hybrids-yield-more-in-drought-stressed-environments-with-no-penalty-in-non-stressed-environments
#14
Eric Adee, Kraig Roozeboom, Guillermo R Balboa, Alan Schlegel, Ignacio A Ciampitti
The potential benefit of drought-tolerant (DT) corn (Zea mays L.) hybrids may depend on drought intensity, duration, crop growth stage (timing), and the array of drought tolerance mechanisms present in selected hybrids. We hypothesized that corn hybrids containing DT traits would produce more consistent yields compared to non-DT hybrids in the presence of drought stress. The objective of this study was to define types of production environments where DT hybrids have a yield advantage compared to non-DT hybrids...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27751689/the-trade-offs-between-milk-production-and-soil-organic-carbon-storage-in-dairy-systems-under-different-management-and-environmental-factors
#15
Miko U F Kirschbaum, Louis A Schipper, Paul L Mudge, Susanna Rutledge, Nicolas J B Puche, David I Campbell
A possible agricultural climate change mitigation option is to increase the amount of soil organic carbon (SOC). Conversely, some factors might lead to inadvertent losses of SOC. Here, we explore the effect of various management options and environmental changes on SOC storage and milk production of dairy pastures in New Zealand. We used CenW 4.1, a process-based ecophysiological model, to run a range of scenarios to assess the effects of changes in management options, plant properties and environmental factors on SOC and milk production...
January 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/27714820/analysis-of-water-and-nitrogen-use-efficiency-for-maize-zea-mays-l-grown-on-soft-rock-and-sand-compound-soil
#16
Huanyuan Wang, Jichang Han, Wei Tong, Jie Cheng, Haiou Zhang
BACKGROUND: Maize was grown on compound soils constituted from mixtures of soft rock and sand at different ratios, and water use efficiency (WUE), nitrogen use efficiency (NUE) and fertilizer use efficiency (FUE) were quantified. This was used to assist designing strategies for optimizing water and nitrogen management practices for maize on the substrates used. Maize was sown in composite soil which was prepared in three ratios of soft rock and sand (1:1, 1:2 and 1:5) in Mu Us Sandy land, Yuyang district, Yulin city, China...
October 6, 2016: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/27698532/evaluation-of-the-effects-of-mulch-on-optimum-sowing-date-and-irrigation-management-of-zero-till-wheat-in-central-punjab-india-using-apsim
#17
Balwinder-Singh, E Humphreys, D S Gaydon, P L Eberbach
Machinery for sowing wheat directly into rice residues has become more common in the rice-wheat systems of the north-west Indo-Gangetic Plains of South Asia, with increasing numbers of farmers now potentially able to access the benefits of residue retention. However, surface residue retention affects soil water and temperature dynamics, thus the optimum sowing date and irrigation management for a mulched crop may vary from those of a traditional non-mulched crop. Furthermore, the effects of sowing date and irrigation management are likely to vary with soil type and seasonal conditions...
October 2016: Field Crops Research
https://www.readbyqxmd.com/read/27697373/managing-land-application-of-coal-seam-water-a-field-study-of-land-amendment-irrigation-using-saline-sodic-and-alkaline-water-on-a-red-vertisol
#18
J McL Bennett, A Marchuk, S R Raine, S A Dalzell, D C Macfarlane
Coal seam (CS) gas operations coproduce water with gas from confined CS aquifers. This CS water represents a potential agricultural resource if the water is able to be chemically amended to comply with management guidelines. Stoichiometric quantities of sulphur and gypsum amendments can be used to neutralise the alkalinity and reduce the sodicity of CS water respectively. These amendments can either be mixed in-line at a water treatment plant or applied directly to land prior to the application of CS water (a practice termed land amendment irrigation - LAI)...
December 15, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27671634/green-and-blue-water-demand-from-large-scale-land-acquisitions-in-africa
#19
Emma Li Johansson, Marianela Fader, Jonathan W Seaquist, Kimberly A Nicholas
In the last decade, more than 22 million ha of land have been contracted to large-scale land acquisitions in Africa, leading to increased pressures, competition, and conflicts over freshwater resources. Currently, 3% of contracted land is in production, for which we model site-specific water demands to indicate where freshwater appropriation might pose high socioenvironmental challenges. We use the dynamic global vegetation model Lund-Potsdam-Jena managed Land to simulate green (precipitation stored in soils and consumed by plants through evapotranspiration) and blue (extracted from rivers, lakes, aquifers, and dams) water demand and crop yields for seven irrigation scenarios, and compare these data with two baseline scenarios of staple crops representing previous water demand...
October 11, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27536533/climate-change-impacts-on-irrigated-rice-and-wheat-production-in-gomti-river-basin-of-india-a-case-study
#20
N S Abeysingha, Man Singh, Adlul Islam, V K Sehgal
Potential future impacts of climate change on irrigated rice and wheat production and their evapotranspiration and irrigation requirements in the Gomti River basin were assessed by integrating a widely used hydrological model "Soil and Water Assessment Tool (SWAT)" and climate change scenario generated from MIROC (HiRes) global climate model. SWAT model was calibrated and validated using monthly streamflow data of four spatially distributed gauging stations and district wise wheat and rice yields data for the districts located within the basin...
2016: SpringerPlus
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