Increasing Water Use Efficiency for Potato Under Different Irrigation Systems and Potassium Fertilizer Rates

Water scarcity is worsened by climate change. Water savings can be reached by improving irrigation efficiency both on farm and on water supply. To do that, the choice of the best irrigation technology is not always straightforward, because farmers need to renew and implement farm infrastructures for irrigation. This study compares three irrigation systems, one drip irrigation and two sprinkler (center pivot and hose-reel) systems, on environmental, economic, and energetic performance under irrigated and non-irrigated maize cropping. The study combines impact and efficiency indicators, addressing a sustainability analysis for the irrigation practice under the three different irrigation systems. The sustainability for the irrigation systems was assessed using water-related indicators (water use efficiency, irrigation water use efficiency, and water footprint), biomass (crop growth rate, relative growth rate, harvest index, and yield response factor), and energy indicators (energy footprint, performance, and energy cost footprint) for the environmental aspect; and the economic-based indicators (water productivity and economic water footprint) for the economic aspect. Main results address the center pivot system as the best solution for irrigation practice since it demonstrated higher economic and environmental performance. Moreover, maize under the pivot system allowed a higher biomass production, economic benefits, and water use efficiency.

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Effect of alternate furrow irrigation and potassium fertilizer on seed yield, water use efficiency and fatty acids of rapeseed

Idesia (Arica) ◽

10.4067/s0718-34292016005000005 ◽

2016 ◽

pp. 0-0 ◽

Cited By ~ 1

Author(s):

Abdollah Bahrani ◽

Jafar Pourreza

Keyword(s):

Fatty Acids ◽

Water Use Efficiency ◽

Water Use ◽

Seed Yield ◽

Furrow Irrigation ◽

Potassium Fertilizer ◽

Use Efficiency ◽

Alternate Furrow Irrigation

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A survey of water use efficiency on irrigated dairy farms in northern Victoria

Australian Journal of Experimental Agriculture ◽

10.1071/ea02234 ◽

2004 ◽

Vol 44 (2) ◽

pp. 131 ◽

Cited By ~ 13

Author(s):

C. J. Linehan ◽

D. P. Armstrong ◽

P. T. Doyle ◽

F. Johnson

Keyword(s):

Water Use Efficiency ◽

Milk Production ◽

Water Use ◽

Irrigation Water ◽

Milk Fat ◽

Irrigation System ◽

Survey Period ◽

Irrigation Systems ◽

Water Right ◽

Use Efficiency

Water use efficiency (WUE) in irrigated dairy systems has been defined, in this paper, as the amount of milk (kg milk fat plus protein) produced from pasture per megalitre of water (irrigation plus effective rainfall). A�farm survey was conducted for the 1997–98 and 1998–99 seasons in the Goulburn Irrigation System (GIS) and Murray Irrigation System (MIS) when the irrigation water allocated to irrigators in the GIS was low (100–120% of water right compared with the MIS which was 130 and 200% of water right). These data were analysed in conjunction with information collected on the same farms in the 1994–95 and 1995–96 seasons when the irrigation water allocated to irrigators in both systems was above 150% of water right (Armstrong et al. 1998, 2000). The aim of the survey was to determine if the management decisions made by dairy farmers in seasons of low irrigation water allocations had an impact on WUE.Milk production averaged across the 2 irrigation systems increased significantly over the 5-year period (57 540–75 040 kg milk fat + protein per farm). Over the same period the amount of irrigation water applied (GIS�7.6 ML/ha, MIS 9.2 ML/ha) and the milking area (GIS 72 ha, MIS 73 ha) remained constant. The amount of concentrates fed per cow (GIS 650–1100 kg DM, MIS 480–860 kg DM) and per farm (GIS 119–228 t DM, MIS�72–157 t DM) increased, but pasture consumption (GIS 8.9–9.5 t DM/ha, MIS 9.1–9.7 t DM/ha) did not increase significantly over the survey period. Therefore, the increase in milk production appeared to come primarily from an increase in supplementary feeding rather than an increase in pasture consumption, resulting in no significant change in WUE in either system (GIS 66 kg milk fat + protein/ML, MIS 61 kg milk fat + protein/ML).The survey results indicate that despite varying water allocations in the 2 major irrigation systems in northern Victoria, milk production on farms in both systems increased while changes in WUE could not be detected by the methods used. This suggests tactical options to increase WUE in response to short-term changes in water allocation were either difficult to implement or not a priority in a business sense.

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Interaction Between Water and Nitrogen Application on Yields and Water-use Efficiency of Tomato and Pepper in Sandy Soil

HortScience ◽

10.21273/hortsci.41.4.981c ◽

2006 ◽

Vol 41 (4) ◽

pp. 981C-981 ◽

Cited By ~ 2

Author(s):

Lincoln Zotarelli ◽

Johannes Scholberg ◽

Michael Dukes ◽

Hannah Snyder ◽

Rafael Munoz-Carpena ◽

...

Keyword(s):

Water Use Efficiency ◽

Water Use ◽

Drip Irrigation ◽

Production Systems ◽

Irrigation Scheduling ◽

N Leaching ◽

Plastic Mulch ◽

Use Efficiency ◽

Irrigation Treatments ◽

Fertilizer Rates

Several practices have been adopted to minimize water use and potential N leaching of vegetable production systems, including use of drip irrigation, plastic mulch, and fertigation. However, these practices may not be adequate on sandy soils with poor water and nutrient retention capacities. The objectives of this study were to evaluate the interactive effects of irrigation practices and fertilizer rates on yield, fertilizer requirements, and N-leaching of pepper and tomato production systems. Bell pepper and tomato were planted on plastic mulched to evaluate the effects of three nitrogen (N) fertilizer rates (154, 192, 288 kg·ha -1 N for pepper vs. 166, 208, and 312 kg·ha-1 N for tomato) and three irrigation scheduling methods were evaluated. Depending on sensor readings, soil moisture sensor (SMS) irrigation treatments allowed up to five watering events per day where as for the fixed duration treatment irrigation was applied once a day. For tomato, the effect of subsurface drip irrigation (SDI) was also evaluated. Compared to TIME, use of SMS control system reduced water use by 29& to 44% and 37% to 66% for tomato and pepper, respectively. Tomato yield was significantly higher on SMS and SDI treatments compared to TIME treatments. For pepper yield and biomass accumulation were not affected by irrigation treatments. The average yields were 24.6 and 27.8 Mg·ha-1 of fresh marketable fruits for pepper and tomato, respectively. Nitrogen rate did not affect yield and optimal yield N rate did not affect yield for either crop. On average, SMS treatments increased irrigation water use efficiency 2–3 times compared to TIME treatments for both tomato and pepper.

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Effect of Irrigation Systems, Pulse Irrigation Technique and Cobalt Application on Productivity and Water use Efficiency of Tomato Plants Grown in New Reclaimed Soil

Assiut Journal of Agricultural Sciences ◽

10.21608/ajas.2017.2796 ◽

2017 ◽

Vol 47 (6-2) ◽

pp. 583-601

Keyword(s):

Water Use Efficiency ◽

Water Use ◽

Irrigation Systems ◽

Tomato Plants ◽

Reclaimed Soil ◽

Use Efficiency

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Greenhouse Carbon Dioxide Supplementation with Irrigation and Fertilization Management of Geranium and Fountain Grass

HortScience ◽

10.21273/hortsci15327-20 ◽

2020 ◽

Vol 55 (11) ◽

pp. 1772-1780

Author(s):

Hardeep Singh ◽

Megha R. Poudel ◽

Bruce Dunn ◽

Charles Fontanier ◽

Gopal Kakani

Keyword(s):

Carbon Dioxide ◽

Water Use Efficiency ◽

Water Use ◽

Ornamental Plants ◽

Dry Weight ◽

Experimental Conditions ◽

Greenhouse Production ◽

Use Efficiency ◽

Irrigation Treatments ◽

Fertilizer Rates

Increase in ambient carbon dioxide (CO2) concentration is beneficial for plant growth due to increased photosynthesis and water use efficiency. A greenhouse study was conducted to investigate how supplemented CO2 influences optimal irrigation and fertilization management for production of two ornamental plants. Two identical greenhouses were used, with one having CO2 supplementation and the other serving as the control with ambient CO2 concentration. Tensiometer-based irrigation treatments were applied at soil tensions of –5, –10, and –15 kPa with 0-, 3-, 6-, or 9-g controlled-release fertilizer rates applied in factorial with irrigation treatments. Plugs of geranium ‘Pinto Premium Rose Bicolor’ and fountain grass were grown under experimental conditions for 12 and 16 weeks, respectively. The results showed that CO2 supplementation increased the dry weight of geranium ‘Pinto Premium Rose Bicolor’ and fountain grass by 35% and 39%, respectively. Under the two driest irrigation regimes (–10 and –15 kPa), photosynthesis of geranium ‘Pinto Premium Rose Bicolor’ increased with CO2 supplementation compared with the ambient condition. Similarly, for fountain grass, the moderately watered (–10 kPa) treatment had a greater rate of photosynthesis with greater fertilizer rates of 6 or 9 g. CO2 supplementation resulted in increased water use efficiency of both species, whereas rate of transpiration was lower only in fountain grass. Among different fertilizer rates, 6- or 9-g fertilizer rates had greater values for dry weight, number of flowers, and stomatal conductance in both species. Therefore, it can be concluded that CO2 supplementation can help in efficient use of water for greenhouse production of ornamental plants.

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