scholarly journals THE EFFECT OF DIFFERENT NITROGEN DOSES AND IRRIGATION INTERVALS ON YIELD, IRRIGATION WATER AMOUNT OF COTTON PLANT GROWN IN EAST OF MEDITERRANEAN REGION AND ECONOMICAL ANALYSIS

2021 ◽  
Author(s):  
Engin GÖNEN ◽  
Çağatay TANRIVERDİ
Keyword(s):  
Cotton Plant ◽  
Irrigation Water ◽  
Mediterranean Region ◽  
Economical Analysis ◽  
Plant Grown ◽  
Water Amount

scholarly journals Mediterranean irrigation under climate change: more efficient irrigation needed to compensate increases in irrigation water requirements

2015 ◽  
Vol 12 (8) ◽  
pp. 8459-8504 ◽  
Author(s):  
M. Fader ◽  
S. Shi ◽  
W. von Bloh ◽  
A. Bondeau ◽  
W. Cramer
Keyword(s):  
Climate Change ◽  
Irrigation Water ◽  
Mediterranean Region ◽  
Eastern Mediterranean ◽  
Water Requirements ◽  
Co2 Fertilization ◽  
Fertilization Effect ◽  
Co2 Fertilization Effect ◽  
The Mediterranean ◽  
Irrigation Requirements

Abstract. Irrigation in the Mediterranean is of vital importance for food security, employment and economic development. This study systematically assesses how climate change and increases in atmospheric CO2 concentrations may affect irrigation requirements in the Mediterranean region by 2080–2090. Future demographic change and technological improvements in irrigation systems are accounted for, as is the spread of climate forcing, warming levels and potential realization of the CO2-fertilization effect. Vegetation growth, phenology, agricultural production and irrigation water requirements and withdrawal were simulated with the process-based ecohydrological and agro-ecosystem model LPJmL after a large development that comprised the improved representation of Mediterranean crops. At present the Mediterranean region could save 35 % of water by implementing more efficient irrigation and conveyance systems. Some countries like Syria, Egypt and Turkey have higher saving potentials than others. Currently some crops, especially sugar cane and agricultural trees, consume in average more irrigation water per hectare than annual crops. Different crops show different magnitude of changes in net irrigation requirements due to climate change, being the increases most pronounced in agricultural trees. The Mediterranean area as a whole might face an increase in gross irrigation requirements between 4 and 18 % from climate change alone if irrigation systems and conveyance are not improved (2 °C global warming combined with full CO2-fertilization effect, and 5 °C global warming combined with no CO2-fertilization effect, respectively). Population growth increases these numbers to 22 and 74 %, respectively, affecting mainly the Southern and Eastern Mediterranean. However, improved irrigation technologies and conveyance systems have large water saving potentials, especially in the Eastern Mediterranean, and may be able to compensate to some degree the increases due to climate change and population growth. Both subregions would need around 35 % more water than today if they could afford some degree of modernization of irrigation and conveyance systems and benefit from the CO2-fertilization effect. Nevertheless, water scarcity might pose further challenges to the agricultural sector: Algeria, Libya, Israel, Jordan, Lebanon, Syria, Serbia, Morocco, Tunisia and Spain have a high risk of not being able to sustainably meet future irrigation water requirements in some scenarios. The results presented in this study point to the necessity of performing further research on climate-friendly agro-ecosystems in order to assess, on the one side, their degree of resilience to climate shocks, and on the other side, their adaptation potential when confronted with higher temperatures and changes in water availability.

scholarly journals Numerical simulation on effect of irrigation conditions on water temperature distribution in a paddy field

2022 ◽  
Author(s):  
Kazuhiro Nishida ◽  
Shuichiro Yoshida ◽  
Sho Shiozawa
Keyword(s):  
Water Management ◽  
Numerical Simulation ◽  
Temperature Distribution ◽  
Water Temperature ◽  
Physical Model ◽  
Irrigation Water ◽  
Paddy Field ◽  
Meteorological Conditions ◽  
Paddy Fields ◽  
Water Amount

AbstractWater management methods regulate water temperature in paddy fields, which affects rice growth and the environment. To understand the effect of irrigation conditions on water temperature in a paddy field, water temperature distribution under 42 different irrigation models including the use of ICT water management, which enables remote and automatic irrigation, was simulated using a physical model of heat balance. The following results were obtained: (1) Irrigation water temperature had a more significant effect on paddy water temperature close to the inlet. As the distance from the inlet increased, the water temperature converged to an equilibrium, which was determined by meteorological conditions and changes in water depth. (2) Increasing the irrigation rate with higher irrigation water amount increased the extent and magnitude of the effects of the irrigation water temperature. (3) When total irrigation water amount was the same, increasing the irrigation rate decreased the time-averaged temperature gradient effect over time across the paddy field. (4) Irrigation during the lowest and highest paddy water temperatures effectively decreased and increased the equilibrium water temperature, respectively. The results indicate that irrigation management can be used to alter and control water temperature in paddy fields, and showed the potential of ICT water management in enhancing the effect of water management in paddy fields. Our results demonstrated that a numerical simulation using a physical model for water temperature distribution is useful for revealing effective water management techniques under various irrigation methods and meteorological conditions.

scholarly journals EFEITO DO CO2 APLICADO VIA ÁGUA DE IRRIGAÇÃO SOBRE A CULTURA DA ALFACE (Lactuca sativa L.)

Irriga ◽  
2007 ◽  
Vol 12 (4) ◽  
pp. 492-504
Author(s):  
Jorge Tomoyoshi Tamagi ◽  
Márcio Antonio Vilas Boas ◽  
Silvio César Sampaio ◽  
Simone Damasceno ◽  
Vandeir Francisco Guimarães
Keyword(s):  
Carbon Dioxide ◽  
Experimental Design ◽  
Lactuca Sativa ◽  
Irrigation Water ◽  
Drip Irrigation ◽  
Control Plant ◽  
Study Objective ◽  
Economical Analysis ◽  
Lactuca Sativa L ◽  
Final Harvest

EFEITO DO CO2 APLICADO VIA ÁGUA DE IRRIGAÇÃO SOBRE A CULTURA DA ALFACE (Lactuca sativa L.)  Jorge Tomoyoshi Tamagi1; Marcio Antonio Vilas Boas1; Silvio Cesar Sampaio1; Simone Damasceno1; Vandeir Francisco Guimarães21Centro de Ciências Exatas e Tecnológicas-CCET, Universidade Estadual do Oeste do Paraná - Unioeste, Campus de Cascavel, Cascavel,  PR, [email protected] de Ciências Agrárias-CCA, Universidade Estadual do Oeste do Paraná – Unioeste, Campus de Marechal Cândido Rondon, Marechal Cândido Rondon,  PR   1 RESUMO                     Este trabalho teve como objetivo estudar a influência de diferentes doses de aplicação de CO2, via água de irrigação por gotejamento com o uso de fitas Poritex,  no desenvolvimento e na produtividade da alface (Lactuca sativa L.). O experimento foi realizado no período de março à maio de 2004, em Cascavel-PR. O experimento foi conduzido sob túneis plásticos em delineamento experimental inteiramente casualizado, representado por quatro tratamentos com cinco repetições com a finalidade de testar as doses de CO2  na alface, cultivar Vera. As doses de CO2 foram  0, 1, 3 e 6 L min-1, sendo as irrigações  realizadas diariamente às 10h, durante 10 minutos, após 10 dias do transplante das mudas até 1 dia antes da colheita final, totalizando 215 mm de água por canteiro. Os resultados mostraram que as doses 1 e 3 L min-1 de CO2 aplicadas via água promoveram aumento na produtividade, atingindo valores de 26,52% e 14,47%, quando comparado à testemunha. A análise econômica mostrou viabilidade da aplicação de CO2 via água de irrigação. UNITERMOS: irrigação por gotejamento; dióxido de carbono; alface; doses.  TAMAGI, J.T.; VILAS BOAS, M.A.; SAMPAIO, S.C.; DAMASCENO, S.; GUIMARÃES, V.F. EFFECT OF CO2 APPLIED TO LETTUCE CROP (Lactuca sativa L.) THROUGH IRRIGATION WATER  2 ABSTRACT                     This study objective was to study the influence of different rates of CO2 application, by  irrigation water, by dripping it with the use of poritex bands, on lettuce (Lactuca sativa L.) cultivation and production. The experiment was carried out from March to May, 2004, in Cascavel-PR. The experiment was conducted in plastic tunnels and ina random experimental design with four treatments and five replications in order to test predetermined CO2 rates on lettuce, Vera cultivar. The CO2 rates were 0, 1, 3 and 6 L min-1. The irrigation was daily at 10 o’clock during 10 minutes, 10 days after the plants transplantation, until 01 day before the final harvest, adding up to 215 mm of the water per portion. The results have shown that the 1 and 3 L min-1 CO2 rates, applied by water, caused increase in production, obtaining 26.52% and 14.47%  values,  when  compared  to  the control  plant.  The economical analysis indicated the viability of CO2 application via irrigation water.KEYWORDS: drip irrigation; carbon dioxide; lettuce; rates

scholarly journals Determination of Irrigation Water Amount and Interval for Carnation (Dianthus caryophyllus L.) with Pan Evaporation Method

HortScience ◽  
2011 ◽  
Vol 46 (1) ◽  
pp. 102-107 ◽  
Author(s):  
Yusuf Ucar ◽  
Soner Kazaz ◽  
Mehmet Atilla Askin ◽  
Köksal Aydinsakir ◽  
Abdullah Kadayifci ◽  
...  
Keyword(s):  
Irrigation Water ◽  
Dianthus Caryophyllus ◽  
Yield Response ◽  
Pan Evaporation ◽  
Evaporation Method ◽  
Significant Relationships ◽  
Yield Response Factor ◽  
Experimental Treatments ◽  
Water Amount

This study was carried out to determine the optimum irrigation water amount and interval for carnation plants (Dianthus caryophyllus L.) using the pan evaporation method. The values of class A pan, located inside the greenhouse, were used to determine the irrigation water amount. Irrigation treatments consisted of three irrigation intervals (I1: 1-, I2: 2-, and I3: 3-day) and five crop-pan coefficients (kcp1: 0.25, kcp2: 0.50, kcp3: 0.75, kcp4: 1.00, and kcp5: 1.25). Irrigation water amounts applied to the experimental treatments ranged from 218 to 786 mm; seasonal evapotranspiration ranged from 219 to 601 mm and the yield acquired from the treatments ranged from 10 to 89.82 stems/m2. The highest yield was obtained from I1kcp4 (89.56 stems/m2) followed by I1kcp5 (82.89 stems/m2) and I1kcp3 (82.22 stems/m2). The seasonal yield response factor (ky) was calculated to be 0.73, 1.00, and 1.42 in I1, I2, and I3, respectively. Significant relationships were obtained between yield and irrigation water (R2 = 0.998) and evapotranspiration (R2 = 0.993) in the I1 treatments, in which the highest yield was found. In carnation cultivation under greenhouse conditions, it was proposed to apply irrigation water with 1-day intervals under a crop-pan coefficient of kcp4.

Responses to the Irrigation Water Amount of Spinach Supplemented with Organic Amendment in Greenhouse Conditions

2015 ◽  
Vol 46 (3) ◽  
pp. 327-342 ◽  
Author(s):  
Melek Ekinci ◽  
Selda Ors ◽  
Ustun Sahin ◽  
Ertan Yildirim ◽  
Atilla Dursun
Keyword(s):  
Irrigation Water ◽  
Organic Amendment ◽  
Water Amount
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