Influence of different controlled drainage strategies on the water and salt environment of ditch wetland: A model-based study

Li, Shan; Wu, Miao; Jia, Zhang; Luo, Weihong; Fei, Liangjun; Li, Jingsi

doi:10.1016/j.still.2020.104894

Cited by 8 publications

(6 citation statements)

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“…In this study, the increased soil salinity associated with CD had no detrimental effect on grain and straw yields because the maximum soil salinity (4.00 dS/m) was lower than the salinity threshold (6.00 dS/m) known to negatively affect wheat crop growth. However, soil salinity under SFD-1.2 treatment was not affected across the two seasons, suggesting over-drainage as indicated by drainage ratio and drainage outflow (El-Ghannam et al, 2021;Li et al, 2021). Similarly, Christen et al (2001) observed the association between over-drainage and lower soil salinity for most SFD systems in Australia.…”

Section: Soil Salinity Affected By Controlled Drainage Treatmentsmentioning

confidence: 84%

“…Controlled drainage (CD) was found to be a promising tool that could decrease the amount of drainage water, maintain crop yield, and reduce drainage off-site effects, i.e., nitrate and phosphorus (P) outflow to the surface water and groundwater (Ayars et al, 2006a;Ritzema 2016;Javani et al, 2018;Sojka et al, 2019;Li et al, 2021). CD is a tool to manage the water table by maintaining water at the desired depth, assuring sufficient aeration and watering of the root zone (Lavaire et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Controlled drainage in the Nile River delta of Egypt: a promising approach for decreasing drainage off-site effects and enhancing yield and water use efficiency of wheat

et al. 2023

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North Africa is one of the most regions impacted by water shortage. The implementation of controlled drainage (CD) in the northern Nile River delta of Egypt is one strategy to decrease irrigation, thus alleviating the negative impact of water shortage. This study investigated the impacts of CD at different levels on drainage outflow, water table level, nitrate loss, grain yield, and water use efficiency (WUE) of various wheat cultivars. Two levels of CD, i.e., 0.4 m below the soil surface (CD-0.4) and 0.8 m below the soil surface (CD-0.8), were compared with subsurface free drainage (SFD) at 1.2 m below the soil surface (SFD-1.2). Under each drainage treatment, four wheat cultivars were grown for two growing seasons (November 2018-April 2019 and November 2019-April 2020). Compared with SFD-1.2, CD-0.4 and CD-0.8 decreased irrigation water by 42.0% and 19.9%, drainage outflow by 40.3% and 27.3%, and nitrate loss by 35.3% and 20.8%, respectively. Under CD treatments, plants absorbed a significant portion of their evapotranspiration from shallow groundwater (22.0% and 8.0% for CD-0.4 and CD-0.8, respectively). All wheat cultivars positively responded to CD treatments, and the highest grain yield and straw yield were obtained under CD-0.4 treatment. Using the initial soil salinity as a reference, the soil salinity under CD-0.4 treatment increased two-fold by the end of the second growing season without negative impacts on wheat yield. Modifying the drainage system by raising the outlet elevation and considering shallow groundwater contribution to crop evapotranspiration promoted water-saving and WUE. Different responses could be obtained based on the different plant tolerance to salinity and water stress, crop characteristics, and growth stage. Site-specific soil salinity management practices will be required to avoid soil salinization due to the adoption of long-term shallow groundwater in Egypt and other similar agroecosystems.

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Section: Soil Salinity Affected By Controlled Drainage Treatmentsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Controlled drainage in the Nile River delta of Egypt: a promising approach for decreasing drainage off-site effects and enhancing yield and water use efficiency of wheat

et al. 2023

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“…Under the condition of no rainfall or irrigation supply, the soil moisture content will continue to decrease until it reaches the lower limit due to evapotranspiration. Controlling drainage changes the field drainage outflow and, on the one hand, changes the total amount of drainage and, on the other hand, changes the ratio of surface and subsurface drain outflow [22][23][24]. In this paper, the critical test period was from May to September.…”

Section: Effect Of Controlled Drainage On the Soil Moisturementioning

confidence: 99%

Experimental Study of the Effect of Controlled Drainage on Soil Water and Nitrogen Balance

Yuan

Xiong

et al. 2021

Water

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Field experiments and micro test pit experiments are conducted at the Four Lake Watershed with a shallow groundwater table in the Hubei province of China in order to study the effect of controlled pipe drainage on soil moisture and nitrogen under different experiment scales. Soil moisture and nitrogen contents are continuously observed at the effective soil depth; water and nitrogen balance are calculated after several heavy rainfalls. The results showed that controlled pipe drainage significantly reduced the fluctuation of soil water content in the entire growth stage. There is a positive correlation between the soil moisture and the control water level in the test pits but no obvious correlation between them in the field experiments, which is related to the vertical and lateral recharge of groundwater in the field. After rainfall, soil organic matter mineralization was enhanced, and the control pipe drainage measures increased the relative content of soil mineralized ammonia nitrogen, which enhanced the stability of soil nitrogen and helped to reduce the loss of nitrogen. The calculation of soil water and nitrogen balance in the field and micro-area after rainfall showed that the soil water storage increased in the effective soil layer under the control water level of 30 cm and 50 cm after rainfall, and the amount of nitrogen mineralization was larger than that under the free drainage treatment.

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“…9 The improvement of water-N productivity and reduction of N residues through agronomic management measures have therefore become urgent matters. [10][11][12][13] Previous studies have shown that intercropping has changed the soil environment and the way crops absorb nutrients. 14 In legume/non-legume intercropping systems, increasing the biological N fixation (BNF) capacity by legumes is an important pathway for reducing N fertilizer input and mitigating N residues.…”

Section: Introductionmentioning

confidence: 99%

“…Remarkably, N leaching was controlled by soil conditioner and cropping patterns 9 . The improvement of water‐N productivity and reduction of N residues through agronomic management measures have therefore become urgent matters 10‐13 …”

Section: Introductionmentioning

confidence: 99%

Poly‐γ‐glutamic acid improved biological nitrogen fixation, water‐nitrogen productivity, and nitrate residue in cotton/soybean intercropping

Jing,

Shi,

Liu

et al. 2023

J Sci Food Agric

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BackgroundPoly‐γ‐glutamic acid (γ‐PGA) can promote crop growth and improve soil properties efficiently. However, the optimal application rate of γ‐PGA in legume/non‐legume intercropping systems is still unclear. A potted experiment was conducted to investigate the effects of five γ‐PGA rates (0%, 0.1%, 0.2%, 0.3%, and 0.4%, represented by CK, P1, P2, P3, and P4, respectively) on biological nitrogen (N) fixation (BNF), water‐N productivity, and nitrate distribution in a cotton/soybean intercropping system.ResultsThe results showed that the growth indicators (plant height, stem diameter, leaf area index, root dry weight, root length) of cotton and soybean increased first and then decreased with increasing γ‐PGA rates, and all growth indicators of cotton and soybean showed peaks in P3 and P2 treatments. The stable 15N isotope method indicated that γ‐PGA promoted the BNF capacity of soybean and soil. In particular, the percentage of N derived from the atmosphere (Ndfa) in soybean reached 61.94% in the P2 treatment. Poly‐γ‐glutamic acid improved the water‐N productivity, and the total N partial factor productivity (NPFP) and water productivity (WP) in P3 treatment increased by 23.80% and 43.86% compared with the CK treatment. The γ‐PGA mitigation of potential nitrate residue also decreased first and then increased with increasing γ‐PGA rates.ConclusionMultivariate regression analysis showed that 0.22% of the optimal γ‐PGA application rate could obtain a higher yield and water‐N productivity in cotton/soybean intercropping system simultaneously. © 2023 Society of Chemical Industry.

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Influence of different controlled drainage strategies on the water and salt environment of ditch wetland: A model-based study

Cited by 8 publications

References 50 publications

Controlled drainage in the Nile River delta of Egypt: a promising approach for decreasing drainage off-site effects and enhancing yield and water use efficiency of wheat

Controlled drainage in the Nile River delta of Egypt: a promising approach for decreasing drainage off-site effects and enhancing yield and water use efficiency of wheat

Experimental Study of the Effect of Controlled Drainage on Soil Water and Nitrogen Balance

Poly‐γ‐glutamic acid improved biological nitrogen fixation, water‐nitrogen productivity, and nitrate residue in cotton/soybean intercropping

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