Potato Yield and Quality Response to Deficit Irrigation

Shock, C. C.; Feibert, Erik B.G.; Saunders, Lamont D.

doi:10.21273/hortsci.33.4.655

Cited by 78 publications

(56 citation statements)

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“…There were The relatively low tuber yields obtained in the farmer's and I40 irrigation treatments compared to those in I100 were associated with lower tuber number m À2 and tuber weight (Table III). In previous studies, Cappaert et al (1992) and Shock et al (1992) stated that adequate water supply before and during tuber initiation increased the number of tubers per plant, whereas after tuber initiation it increased tuber weight (Stark and McCann, 1992;Shock et al, 1998). Therefore, water stress should be avoided during tuber initiation and development which are the most critical periods sensitive to water stress.…”

Section: Crop Yieldmentioning

confidence: 96%

Potato Response to Different Irrigation Regimes Using Saline Water

et al. 2016

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Field experiments were performed to study potato response to irrigation regimes using saline water on a sandy soil in southern Tunisia during the years 2011–2014. Irrigation regimes consisted in the replenishment of cumulated ETc when 35% of the root zone holding capacity is depleted at levels of 100% (I100), 70% (I70) and 40% (I40). The farmer used a fixed irrigation dose and interval, applying 16 mm every 4 days from planting till harvest. Higher soil salinity is observed at harvest under I40 and farmer treatments compared to I100. Highest potato yield was obtained with I100 treatment (24.4–27.5 t ha‐1) across 3 years. Significant reductions in yields were observed under I70 and I40 as compared to I100. The farmer's method also caused significant reductions in yield and resulted in using 15–22% more irrigation water than I100. Water productivity (WP) values varied between 4.3 kg m−3 (farmer) and 18.5 kg m−3 (I40) across different years and treatments. The scheduling technique using the soil water balance (SWB) with variable amounts is more efficient than the farmer's method. Full and deficit treatments (I100 and I70) generated the highest net income. I100 appears to be a promising irrigation strategy for the potato crop in the arid climate of Tunisia. Nonetheless, under water scarcity, irrigation of potato could be scheduled using I70 deficit strategy, with some yield reductions (12.5–23.0%). Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Crop Yieldmentioning

confidence: 96%

Potato Response to Different Irrigation Regimes Using Saline Water

et al. 2016

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“…Several of the parameters in the model depend on the soil, including , m, s and p c . Potatoes are frequently grown in silt loam soil (Shock et al, 1998). Therefore, we chose to use the parameter values for the 'Silt Loam G.E.3' soil from van Genuchten (1980) (i.e.…”

Section: Geometric Soil Environmental Plant and Solute Parameter Vmentioning

confidence: 99%

Mathematical modelling of water and solute movement in ridged versus flat planting systems

Duncan

Daly

Sweeney

et al. 2018

European J Soil Science

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Summary We compared water and solute movement between a ridge and furrow geometry and that of flat soil with a mathematical model. We focused on the effects of two physical processes: root water uptake and pond formation on the soil surface. The mathematical model describes the interaction between solute transport, water movement and surface pond depth. Numerical simulations were used to determine how solutes of varying mobility and rates of degradation penetrated into the two soil geometries over a growing season. Both the ridge and furrow or flat soil geometries could reduce solute leaching, but this depended on several factors. Rain immediately after a solute application was a key factor in determining solute penetration into soil. In cases with delayed rain after a solute application, solutes in ridge and furrow geometries collected adjacent to the root system, resulting in reduced solute penetration compared to the flat soil geometry. In contrast, substantial rain immediately after a solute application resulted in ponding where water infiltration acted as the dominant transport mechanism. This resulted in increased solute penetration in the ridge and furrow geometry compared to the flat soil geometry. Highlights We studied solute movement controlled by ponding in ridge and furrow and flat fields. We found the ridged soil could impede or increase leaching compared to the flat soil. Solute hot‐spots formed in ridge and furrow soil because of root water uptake. Time between solute application and rainfall is a key factor for solute penetration.

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“…Previous studies have shown that adequate water supply before and during tubers initiation increases the number of tubers per plant [15] [16]; whereas, after tubers initiation, it increases their individual sizes [17] [18]. Water deficit produces smaller tuber size and lower yields [7] [8].…”

Section: Introductionmentioning

confidence: 99%

Yield and Water Productivity of Drip-Irrigated Potato under Different Nitrogen Levels and Irrigation Regime with Saline Water in Arid Tunisia

Mokh¹,

Nagaz²,

Masmoudi³

et al. 2015

AJPS

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Field studies were conducted on a sandy soil during autumn of 2010 and 2011 in an arid region of Tunisia to investigate the effects of nitrogen and irrigation regimes with saline water on yield and water productivity (WP) of potato (Solanum tuberosum L. cv. Spunta) and soil salinity. For the two years, irrigation treatments consisted in water replacements of cumulated crop evapotranspiration (ETc) at levels of 100% (I100, full irrigation), 60% (I60) and 30% (I30), when the readily available water in I100 treatment was depleted, while the nitrogen treatments (N) were 0, 100, 200, and 300 kg/ha (No, N100, N200, and N300). Results showed that soil salinity values remained lower than those of electrical conductivity of irrigation water (ECiw) and were the lowest under treatment I100 and the highest with I30 treatment. Relatively low ECe values were also observed under I60 treatment. The highest potato yields for the two years were obtained with I100 treatment. Compared to I100, significant reductions in potato yields were observed under I60 and I30 deficit irrigation treatments resulting from a reduction in tubers number/m² and tuber weight. The water productivity (WP) was found to significantly vary among treatments, where the highest and the lowest values were observed for I30 and I100 treatments, respectively. Potato yield and WP increased with an increase in nitrogen rates. The rate of 300 kg N/ha was seen to give good yield and higher WP of potato under full (I100) and deficit (I60) irrigation treatments. However, application of N adversely affected potato yield and WP, when N level applied above 200 kg N/ha at I30. The WP was improved by N supply, but its effect decreased as the irrigation level increased. The IWP at I100, which produced the highest potato yield, was 8.5 and 9.9 kg/m 3 with N300 but this increased to 11.9 and 15.6 kg/m 3 at I30 with N200, in 2010 and 2011, respectively. These re-* Corresponding author.F. El Mokh et al. 502sults suggested that potato in arid region could be cultivated with acceptable yields while saving irrigation water and reducing nitrogen supply but it was essential to exploit the interaction effect between these two parameters to maximize resource use efficiency.

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Potato Yield and Quality Response to Deficit Irrigation

Cited by 78 publications

References 0 publications

Potato Response to Different Irrigation Regimes Using Saline Water

Potato Response to Different Irrigation Regimes Using Saline Water

Mathematical modelling of water and solute movement in ridged versus flat planting systems

Yield and Water Productivity of Drip-Irrigated Potato under Different Nitrogen Levels and Irrigation Regime with Saline Water in Arid Tunisia

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