keyword
MENU ▼
Read by QxMD icon Read
search

Evapotranspiration irrigation

keyword
https://www.readbyqxmd.com/read/28729701/a-model-based-estimate-of-regional-wheat-yield-gaps-and-water-use-efficiency-in-main-winter-wheat-production-regions-of-china
#1
Zunfu Lv, Xiaojun Liu, Weixing Cao, Yan Zhu
Wheat production is of great importance for national food security and is greatly influenced by the spatial variation of climatic variables, soils, cultivars, etc. This study used WheatGrow and CERES-Wheat models integrated with a GIS to estimate winter wheat productivity, yield gap and water use in the main wheat production regions of China. The results showed that the potential wheat yield gradually increased from south to north and from west to east, with a spatial distribution consistent with the accumulated hours of sunshine...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28728307/changes-in-reference-evapotranspiration-and-its-driving-factors-in-the-middle-reaches-of-yellow-river-basin-china
#2
Dunxian She, Jun Xia, Yongyong Zhang
Reference evapotranspiration (ET0) is important for agricultural, environmental and other studies, and understanding the attribution of its change is helpful to provide information for irrigation scheduling and water resources management. The present study investigates the attribution of the change of ET0 at 49 meteorological stations in the middle reaches of Yellow River basin (MRYRB) of China from 1960 to 2012. Results show that annual ET0 increases from the northwest to the southeast of MRYRB in space. We find that annual ET0 clearly presents a zigzag change pattern rather than a monotonically change during the whole period...
July 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28689035/causative-impact-of-air-pollution-on-evapotranspiration-in-the-north-china-plain
#3
Ling Yao
Atmospheric dispersion conditions strongly impact air pollution under identical surface emissions. The degree of air pollution in the Jing-Jin-Ji region is so severe that it may impose feedback on local climate. Reference evapotranspiration (ET0) plays a significant role in the estimation of crop water requirements, as well as in studies on climate variation and change. Since the traditional correlation analysis cannot capture the causality, we apply the convergent cross mapping method (CCM) in this study to observationally investigate whether the air pollution impacts ET0...
July 6, 2017: Environmental Research
https://www.readbyqxmd.com/read/28642779/mitigating-groundwater-depletion-in-north-china-plain-with-cropping-system-that-alternate-deep-and-shallow-rooted-crops
#4
Xiao-Lin Yang, Yuan-Quan Chen, Tammo S Steenhuis, Steven Pacenka, Wang-Sheng Gao, Li Ma, Min Zhang, Peng Sui
In the North China Plain, groundwater tables have been dropping at unsustainable rates of 1 m per year due to irrigation of a double cropping system of winter wheat and summer maize. To reverse the trend, we examined whether alternative crop rotations could save water. Moisture contents were measured weekly at 20 cm intervals in the top 180 cm of soil as part of a 12-year field experiment with four crop rotations: sweet potato→ cotton→ sweet potato→ winter wheat-summer maize (SpCSpWS, 4-year cycle); peanuts → winter wheat-summer maize (PWS, 2-year cycle); ryegrass-cotton→ peanuts→ winter wheat-summer maize (RCPWS, 3-year cycle); and winter wheat-summer maize (WS, each year)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28603557/can-the-agricultural-aquacrop-model-simulate-water-use-and-yield-of-a-poplar-short-rotation-coppice
#5
Joanna A Horemans, Hanne Van Gaelen, Dirk Raes, Terenzio Zenone, Reinhart Ceulemans
We calibrated and evaluated the agricultural model AquaCrop for the simulation of water use and yield of a short-rotation coppice (SRC) plantation with poplar (Populus) in East Flanders (Belgium) during the second and the third rotation (first 2 years only). Differences in crop development and growth during the course of the rotations were taken into account during the model calibration. Overall, the AquaCrop model showed good performance for the daily simulation of soil water content (R(2) of 0.57-0.85), of green canopy cover (R(2) > 0...
June 2017: Global Change Biology. Bioenergy
https://www.readbyqxmd.com/read/28551886/the-role-of-land-use-change-on-the-sustainability-of-groundwater-resources-in-the-eastern-plains-of-kurdistan-iran
#6
Ata Amini, Ali Hesami
In this study, land use change and its effects on level and volume of groundwater were investigated. Using satellite images and field measurements, change in land uses was determined from 1998 to 2007. By analyzing the observation wells data and preparing the zoning maps in GIS, groundwater level fluctuations were assessed. Considering the area corresponding to these fluctuations, changes in aquifers volume were calculated. The rain gauge and synoptic stations data were used to calculate meteorological parameters and evapotranspiration...
June 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28511357/establishing-and-testing-a-catchment-water-footprint-framework-to-inform-sustainable-irrigation-water-use-for-an-aquifer-under-stress
#7
Betsie le Roux, Michael van der Laan, Teunis Vahrmeijer, Keith L Bristow, John G Annandale
Future water scarcities in the face of an increasing population, climate change and the unsustainable use of aquifers will present major challenges to global food production. The ability of water footprints (WFs) to inform water resource management at catchment-scale was investigated on the Steenkoppies Aquifer, South Africa. Yields based on cropping areas were multiplied with season-specific WFs for each crop to determine blue and green water consumption by agriculture. Precipitation and evapotranspiration of natural vegetation and other uses of blue water were included with the agricultural WFs to compare water availability and consumption in a catchment sustainability assessment...
December 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28494284/evaluating-the-impact-of-irrigation-on-surface-water-groundwater-interaction-and-stream-temperature-in-an-agricultural-watershed
#8
Hedeff I Essaid, Rodney R Caldwell
Changes in groundwater discharge to streams caused by irrigation practices can influence stream temperature. Observations along two currently flood-irrigated reaches in the 640-square-kilometer upper Smith River watershed, an important agricultural and recreational fishing area in west-central Montana, showed a downstream temperature decrease resulting from groundwater discharge to the stream. A watershed-scale coupled surface water and groundwater flow model was used to examine changes in streamflow, groundwater discharge to the stream and stream temperature resulting from irrigation practices...
December 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28418005/simulated-climate-effects-of-desert-irrigation-geoengineering
#9
Wei Cheng, John C Moore, Long Cao, Duoying Ji, Liyun Zhao
Geoengineering, the deliberate large-scale manipulation of earth's energy balance to counteract global warming, is an attractive proposition for sparsely populated deserts. We use the BNU and UVic Earth system models to simulate the effects of irrigating deserts under the RCP8.5 scenario. Previous studies focused on increasing desert albedo to reduce global warming; in contrast we examine how extending afforestation and ecological projects, that successfully improve regional environments, fair for geoengineering purposes...
April 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28341465/influences-of-removing-linear-and-nonlinear-trends-from-climatic-variables-on-temporal-variations-of-annual-reference-crop-evapotranspiration-in-xinjiang-china
#10
Yi Li, Ning Yao, Henry Wai Chau
Reference crop evapotranspiration (ETo) is a key parameter in field irrigation scheduling, drought assessment and climate change research. ETo uses key prescribed (or fixed or reference) land surface parameters for crops. The linear and nonlinear trends in different climatic variables (CVs) affect ETo change. This research aims to reveal how ETo responds after the related CVs were linearly and nonlinearly detrended over 1961-2013 in Xinjiang, China. The ETo-related CVs included minimum (Tmin), average (Tave), and maximum air temperatures (Tmax), wind speed at 2m (U2), relative humidity (RH) and sunshine hour (n)...
March 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28321518/identification-and-characterization-of-durum-wheat-micrornas-in-leaf-and-root-tissues
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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...
February 2017: 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
#20
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
keyword
keyword
52557
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"