Modelling Deep Drainage Rates of Irrigation Strategies Under Cropping Sequence in Subhumid, Subtropical Australia

Kodur, Shreevatsa; Robinson, J. B. D.

doi:10.1002/ird.1813

Cited by 4 publications

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“…In contrast, changes to irrigation strategies can have a significant effect on deep drainage under vegetable cropping, depending on the level of irrigation application. For example, the simulated deep drainage doubled from 84 to 164 mm yr −1 when irrigation was increased from 530 (irrigated to DUL) to 614 mm yr −1 (irrigated to 50% above DUL) under a vegetable‐dominated cropping sequence in the Lockyer Valley (Kodur and Robinson, ). This suggests that deep drainage under vegetable crop rotation can be minimised through efficient irrigation timing and application rate.…”

Section: Resultsmentioning

confidence: 99%

“…(). Stage 1 (U) and stage 2 (Cona) soil evaporation and maximum daily drainage parameters were based on values used earlier (Kodur and Robinson, ). Soil physical properties were set for each soil layer up to 1.8 m depth (Table ).…”

Section: Methodsmentioning

confidence: 99%

“…The curve number, which describes runoff potential for bare soil, was according to Robinson et al (2010) and data from . Stage 1 (U) and stage 2 (Cona) soil evaporation and maximum daily drainage parameters were based on values used earlier (Kodur and Robinson, 2013). Soil physical properties were set for each soil layer up to 1.8 m depth (Table I).…”

Section: Site Climate and Soil Parameterisationmentioning

confidence: 99%

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Deep Drainage Estimates for Irrigated Crop Rotations in Subhumid, Subtropical Australia

Kodur¹,

Robinson²,

Foley³

et al. 2014

Irrig. and Drain.

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Deep drainage rates were modelled for irrigated crop rotations in terms of typical cropping sequences that differ in crop characteristics and irrigation demand. A forage-grain-pasture sequence (sorghum, wheat and lucerne) with supplementary irrigation had an average deep drainage of 11 mm yr À1, transpiration of 703 mm yr À1 and irrigation demand of 326 mm yr À1 . In contrast, a vegetable sequence (broccoli, lettuce, bean and sweetcorn) with adequate irrigation had a deep drainage of 121 mm yr À1, transpiration of 602 mm yr À1 and irrigation demand of 598 mm yr À1. Under similar growing conditions, deep drainage decreased as rooting depth and cropping duration increased, and as irrigation and rainfall decreased. Deep-rooted, stress-tolerant crops such as lucerne and sorghum maximised water use and minimised the deep drainage risks through the use of moisture from preceding well-irrigated vegetable crops and extraction of moisture from deeper soil layers. The study suggests that deep drainage risks under vegetable rotations can be minimised through the selective incorporation of these crops and improved irrigation timing and application rates. These understandings will help to develop water use efficient and economic management strategies under crop rotations. Copyright © 2014 John Wiley & Sons, Ltd. . Pour des conditions de culture similaires, le drainage profond diminuait avec un enracinement racinaire plus profond, avec un allongement de la durée de culture, et avec une réduction des apports en eau (pluie et irrigation). Les cultures tolérantes à la sécheresse ayant un système racinaire profond, telles que la luzerne ou le sorgho, maximisaient l'utilisation en eau et minimisaient le risque de drainage profond via l'utilisation de l'humidité résiduelle du sol après une culture horticole, et l'extraction de l'humidité des couches plus profondes du sol. Cette étude suggère que le risque de drainage profond pour les rotations horticoles peut être minimisé via une incorporation sélective de ces cultures et une meilleure irrigation en termes de timing et taux d'application. Les résultats de cette étude devraient aider à développer des stratégies efficaces économiquement et en terme d'utilisation de l'eau pour les cultures en rotation.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Site Climate and Soil Parameterisationmentioning

confidence: 99%

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Deep Drainage Estimates for Irrigated Crop Rotations in Subhumid, Subtropical Australia

Kodur¹,

Robinson²,

Foley³

et al. 2014

Irrig. and Drain.

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“…Irrigation is used to mitigate the risk of inadequate rainfall, particularly during the vegetative stages of cotton growth [7]. Water availability is one of the most important determinants of the total area of cotton grown under irrigation in the MDB [8,9]. During severe droughts, such as occurred during 2003-2004 and 2007-2008, water availability for irrigation was significantly reduced, which affected total cotton production within the MDB [1,10,11].…”

Section: Introductionmentioning

confidence: 99%

Impacts of Effects of Deficit Irrigation Strategy on Water Use Efficiency and Yield in Cotton under Different Irrigation Systems

et al. 2021

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Irrigated cotton (Gossypium hirsutum L.) growers in the Murray-Darling Basin (MDB) of Australia, are challenged by limited water availability. This modelling-study aimed to determine if deficit irrigation (DI) practices can potentially improve water use efficiency (WUE) for furrow irrigation (FI), overhead sprinkler irrigation (OSI) and subsurface drip irrigation (SDI) systems. We validated the Agricultural Production System sIMulator (APSIM) against observed cotton lint yield and crop biomass accumulation for different management practices. The model achieved concordance correlation coefficients of 0.93 and 0.82 against observed cotton crop biomass accumulation and lint yields, respectively. The model was then applied to evaluate the impacts of different levels of DI on lint yield, WUE across cotton growing locations in the MDB (Goondiwindi, Moree, Narrabri, and Warren), during the period from 1977 to 2017. The different levels of DI for the FI system were no irrigation, full irrigation (TF) and irrigated one out of four, one out of three, one out of two, two out of three and two out of four TF events. For the OSI and SDI systems, DI levels were no irrigation, TF, 20% of TF, 40% of TF, 60% of TF and 80% of TF. Lint yield was maximised under the OSI and SDI systems for most locations by applying 80% of TF. However; modelling identified that WUE was maximised at 60% of full irrigation for OSI and SDI systems. These results suggest there are significant gains in agronomic performance to be gained through the application of DI practices with these systems. For FI, DI had no benefit in terms of increasing yield, while DI showed marginal gains in terms of WUE in some situations. This result is due to the greater exposure to periodic water deficit stress that occurred when DI practices were applied by an FI system. The results suggest that in the northern MDB, water savings could be realised for cotton production under both OSI and SDI systems if DI were adopted to a limited extent, depending on location and irrigation system.

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Soil‐Hydrological Responses to Rainfall Variation in a Subtropical Australian Landscape

Kodur¹,

Robinson²,

Foley³

et al. 2015

Irrigation and Drainage

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Reliable water supply for farming is a global concern, including the Lockyer Valley region, Australia. Knowledge of rainfall variation and resulting irrigation demand and deep drainage can improve crop water use and minimize salinity. Therefore, we modelled irrigation demand and deep drainage for different land-use types of the Lockyer Valley and classified them according to rainfall. During the periods of extremely low rainfall (mean = 468 mm yr -1 ), deep drainage fell by 35-239 mm yr -1 , whereas irrigation demand rose by 160-310 mm yr -1 , relative to extremely high rainfall (1138 mm yr -1 ). With all land-use types, deep drainage rose with water input, but it was consistent in the order (mean, mm yr -1 ): lucerne (8-11), native grass (13), sorghum-wheat sequence (37-64), bare fallow (169) RÉSUMÉLa fiabilité de l'approvisionnement en eau pour l'agriculture est une préoccupation mondiale, y compris dans la région de la Lockyer Valley, en Australie. La connaissance des variations des précipitations et la demande résultante d'irrigation et de drainage profond peuvent améliorer l'utilisation de l'eau des cultures et de minimiser la salinité. Par conséquent, nous avons modélisé la demande d'irrigation et de drainage profond pour l'utilisation de la vallée de Lockyer des terres différentes et les avons classés en fonction de la pluviométrie. Pendant les périodes de précipitations extrêmement faibles (moyenne = 468 mm année -1 ) et par comparaison à une année avec de très fortes précipitations (1138 mm année -1 ), le drainage profond a chuté de 35 à 239 mm année -1 alors que la demande d'irrigation a augmenté de 160 à 310 mm année -1 . En considérant que toutes les terres sont utilisées, le drainage profond a augmenté avec les lames d'eau d'entrée, avec des variations interculturales (valeurs moyennes, mm année -1 ): luzerne (8-11), prairie naturelle (13), séquence de sorgho-blé (37-64), jachère nue (169) et séquence maïs doux-brocoli-haricot (225). Ces tendances décennales de la demande d'irrigation et drainage profond permettent de caractériser les demandes d'irrigation sensibilisation et de sensibiliser aux risques de drainage profond si l'irrigation n'est pas gérée correctement. Ces résultats auront des répercussions plus importantes pour la gestion des cultures et de l'environnement sous des variations de précipitations.

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Modelling Deep Drainage Rates of Irrigation Strategies Under Cropping Sequence in Subhumid, Subtropical Australia

Cited by 4 publications

References 20 publications

Deep Drainage Estimates for Irrigated Crop Rotations in Subhumid, Subtropical Australia

Deep Drainage Estimates for Irrigated Crop Rotations in Subhumid, Subtropical Australia

Impacts of Effects of Deficit Irrigation Strategy on Water Use Efficiency and Yield in Cotton under Different Irrigation Systems

Soil‐Hydrological Responses to Rainfall Variation in a Subtropical Australian Landscape

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