Numerical modeling of soil water dynamics in subsurface drained paddies with midseason drainage or alternate wetting and drying management

Darzi‐Naftchali, Abdullah; Karandish, Fatemeh; Šimůnek, Jiřı́

doi:10.1016/j.agwat.2017.11.017

Cited by 21 publications

(4 citation statements)

References 41 publications

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“…In AWD, the N 2 O is prompted by enhanced denitrification of NO 3 À during the rewetting of dry soils and the following increased nitrification of NH 4 during the dry phase [6]. During the drying phase of AWD irrigation practice, the soil aeration is good and this may improve the land quality, grain yield, utility of N, and water productivity along with reduction in N leaching, while N loss through ammonia volatilization and denitrification, and nitrification increased in AWD practice due to aerobic condition [84]. In comparison with conventional tillage, ammonia volatilization increases by 14% in medium moisture stress conditions and 17% in severe moisture stress conditions whereas denitrification increases by 7% in both medium and severe moisture stress conditions [61,68].…”

Section: Alternate Wetting and Drying (Awd)mentioning

confidence: 99%

Gaseous Losses of Nitrogen from Rice Field: Insights into Balancing Climate Change and Sustainable Rice Production

Ferdous¹,

Mahjabin²,

Asif³

et al. 2023

Sustainable Rice Production - Challenges, Strategies and Opportunities

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The world is confronted with one of the most difficult tasks of the twenty-first century, satisfying society’s expanding food demands while causing agriculture’s environmental impacts. Rice security is the food security for South Asian countries. Rice production requires a large amount of water and fertilizer, especially nitrogenous fertilizer, where urea works as the primary source of nitrogen (N). Different biogeochemical conditions, such as alternate wetting and drying (AWD), intermittent drainage, agroclimatic condition, oxic-anoxic condition, complete flooded irrigation,. have severe impacts on GHGs emission and nitrogen use efficiency (NUE) from rice fields. For sustainable production, it is a must to mitigate the emission of GHGs and increase NUE along with cost minimization. But analytically accurate data about these losses are still not quantifiably justified. In this chapter, we will show the proper use of the measured data with suitable results and discussions to recommend the future cultivation system of rice for sustainable production.

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Section: Alternate Wetting and Drying (Awd)mentioning

confidence: 99%

Gaseous Losses of Nitrogen from Rice Field: Insights into Balancing Climate Change and Sustainable Rice Production

Ferdous¹,

Mahjabin²,

Asif³

et al. 2023

Sustainable Rice Production - Challenges, Strategies and Opportunities

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“…Percolation is an important factor controlling the transport of nitrate [63,64,65] heavy metals [65,66], salts [67] and pesticides [68,69] to groundwater and for reducing the applied water footprint of rice production [2, 70,71,72]. Tensiometers could be used for measuring the drainage losses and for it, electronic tensiometers installed at 450 and 600 mm assuming rhizosphere up to 500 mm [54,59].…”

Section: For Measuring Drainagementioning

confidence: 99%

Tensiometers for Rice Water Footprints

Bhatt

2020

CJAST

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Water footprints (WFs) of rice are quite higher viz. 992 billion cubic metres per year (Gm3 yr−1) than from the other cereals which further responsible for the lower water productivity. Out of global WFs for crop production viz. 7404 Gm3 yr−1 corresponds to 78 % green, 12 % blue, and 10 % grey water, respectively. Around 3000-4000 litres of water required for one kg of rice grains and conventional puddle transplanted flood irrigations responsible for this. Therefore, there is an urgent need to cut down rice WFs share. Over irrigated pounded water under conventional puddle transplanted rice responsible for the emissions of the green house gases in atmosphere, which further has its own complications. With time, due to excessive withdrawals of the underground water, the water table is declining at a faster rate and seems to be beyond the reach of the middle class rice farmers. Rice water productivity declining day by day due to huge water demand of rice crop followed by reduced yields. A major share of the applied irrigation water lost/evaporate in the atmosphere. Soil water tension controls the soil moisture dynamics and directly linked to the plant need based approach. Being a kharif crop, rice season faces harsh summers and where evaporative demands of atmosphere intensified to many folds and thus, irrigation water has to be applied frequently. Annually additional water of worth US $ 39 million is withdrawn in NW Indian Punjab state for feeding crops, particularly rice. Tensiometer is the only instrument provided to the rice farmers for applying irrigation water judiciously based on the plant need which further cut down WFs from 18 to 22%. This practise where on one side saves irrigation water, improves declining land as well as water productivity of rice, also controlled the emissions of GHGs from the soil.

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“…Due to the presence of a hard pan below the plough layer (Darzi-Naftchali et al, 2018) and consequently a different flow pattern to subsurface drains (Ebrahimian and Noory, 2015), the effects of such practices are more complex in paddy soils compared to ordinary fields. Due to the presence of a hard pan below the plough layer (Darzi-Naftchali et al, 2018) and consequently a different flow pattern to subsurface drains (Ebrahimian and Noory, 2015), the effects of such practices are more complex in paddy soils compared to ordinary fields.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to drainage design criteria, soil characteristics and water management practices have an influence on drainage water salinity. Due to the presence of a hard pan below the plough layer (Darzi-Naftchali et al, 2018) and consequently a different flow pattern to subsurface drains (Ebrahimian and Noory, 2015), the effects of such practices are more complex in paddy soils compared to ordinary fields. Simulation models can quickly and cost-effectively describe such complex behaviour of subsurface-drained paddy soils if accurately calibrated and validated.…”

Section: Introductionmentioning

confidence: 99%

Evaluating Drainmod‐s to Predict Drainage Water Salinity and Groundwater Table Depth During Winter Cropping in Heavy‐Textured Paddy Soils

Davoodi

Darzi‐Naftchali

Aghajani‐Mazandarani

2019

Irrigation and Drainage

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Simulation models can quickly and cost‐effectively describe various aspects of management practices in newly reclaimed agricultural soils. In this research, the capability of the DRAINMOD‐S model was evaluated to predict the salinity of the subsurface drainage effluents in a newly subsurface drained paddy field during winter cropping. Measurements of groundwater table depths and drainage water salinity were taken in three conventional subsurface drainage systems at the Sari Agricultural Sciences and Natural Resources University, northern Iran, during three canola growing seasons (2011–2012, 2015–2016 and 2016–2017). The data were used to calibrate and validate the model. The model provided better predictions of groundwater table depths in shallower drainage systems. Measured and simulated drainage water salinities varied, respectively, from 620 to 1580 and 790–1430 mg l−1 in the calibration process and from 441 to 1640 and 656–1820 mg l−1 in the validation process. The differences between measured and simulated salt loads were in the range of 59–174 and 43–586 kg ha−1 in calibration and validation, respectively. The results indicated that DRAINMOD‐S can be used as a management tool to diminish environmental issues in heavy paddy soils from the viewpoint of salt load. © 2019 John Wiley & Sons, Ltd.

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Numerical modeling of soil water dynamics in subsurface drained paddies with midseason drainage or alternate wetting and drying management

Cited by 21 publications

References 41 publications

Gaseous Losses of Nitrogen from Rice Field: Insights into Balancing Climate Change and Sustainable Rice Production

Gaseous Losses of Nitrogen from Rice Field: Insights into Balancing Climate Change and Sustainable Rice Production

Tensiometers for Rice Water Footprints

Evaluating Drainmod‐s to Predict Drainage Water Salinity and Groundwater Table Depth During Winter Cropping in Heavy‐Textured Paddy Soils

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