Mulching and water quality effects on soil salinity and sodicity dynamics and cotton productivity in Central Asia

Bezborodov, G. A.; Shadmanov, D. K.; Mirhashimov, Rahmonkul; Yuldashev, Tulkun; Qureshi, Asad Sarwar; Noble, Andrew; Qadir, Manzoor

doi:10.1016/j.agee.2010.04.005

Cited by 148 publications

(50 citation statements)

References 25 publications

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“…In addition, without necessary supplements, fertilizer-based draw solutions obtained from osmotic dilution can adversely affect the infiltration capacity of soil [24]. As a result, a well-balanced, all-purpose liquid fertilizer is proposed, for the first time, as a draw solution in osmotic dilution for greenwall irrigation.…”

Section: Introductionmentioning

confidence: 99%

Osmotic dilution for sustainable greenwall irrigation by liquid fertilizer: Performance and implications

Xie

Zhang

Cooper

et al. 2015

Journal of Membrane Science

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A novel osmotic dilution process using commercial liquid fertilizer for greenwall irrigation was evaluated. In this process, clean water was extracted from raw sewage by forward osmosis (FO) using a well-balanced, allpurpose commercial liquid fertilizer as draw solution. The diluted liquid fertilizer can then be used for direct sustainable greenwall irrigation. Our results show that the presence of organic matter in the liquid fertilizer draw solution did not compromise FO membrane performance. No discernible changes in water flux and key membrane transport parameters (pure water permeability coefficient, A, and salt (NaCl) permeability coefficient, B) were observed when the organic matter concentration in the draw solution was increased to 2000. mg/L. Parameters influencing the osmotic dilution process were examined in terms of reverse salt flux, liquid fertilizer concentration, cross-flow rate, and feed and liquid fertilizer draw solution temperatures. The reverse flux of phosphate was much lower compared to those of ammonium and potassium as the reverse flux of these solutes were proportionally related to their hydrated radii. Cross-flow rate had no discernible impact on either water flux or reverse nutrient transport. Water and reverse nutrient fluxes increased markedly with increasing temperature, driven by higher water and solute diffusivities. More than 80% water recovery was achieved by osmotic dilution using raw sewage feed. Water production was stable and not affected by deposition of organic matter on the membrane surface. By contrast, reverse nutrient diffusion was hindered due to enhanced steric hindrance. Results reported here have significant environmental implications. Extracting clean water from raw sewage by commercial liquid fertilizers harnesses unique FO mass transfer phenomena and balances greenwall nutrient requirement, thereby sustaining the greenwall irrigation process. AbstractA novel osmotic dilution process using commercial liquid fertilizer for greenwall irrigation was evaluated. In this process, clean water was extracted from raw sewage by forward osmosis (FO) using a well-balanced, all-purpose commercial liquid fertilizer as a draw solution. The diluted liquid fertilizer can then be used for direct sustainable greenwall irrigation. Our results show that the presence of organic matter in the liquid fertilizer draw solution did not compromise FO membrane performance. No discernible changes in water flux and key membrane transport parameters (pure water permeability coefficient, A, and salt (NaCl) permeability coefficient B) were observed when the organic matter concentration in the draw solution was increased to 2,000 mg/L. Parameters influencing the osmotic dilution process were examined in terms of reverse salt flux, liquid fertilizer concentration, cross-flow rate, and feed and liquid fertilizer draw solution temperatures. The reverse flux of phosphate was much lower compared to those of ammonium and potassium as the reverse flux of these solutes were proportionally relat...

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Section: Introductionmentioning

confidence: 99%

Osmotic dilution for sustainable greenwall irrigation by liquid fertilizer: Performance and implications

Xie

Zhang

Cooper

et al. 2015

Journal of Membrane Science

View full text Add to dashboard Cite

show abstract

“…In field agriculture, to restrain water loss and increase water storage through surficial protective covering, water-retaining mulches (e.g., crop straw, gravel sand, and plastic film) are laid on the ground [9][10][11][12][13][14][15][16]. However, a high volume of straw on the ground may hinder activity, causing difficulties in sowing [17], and long-term sand coverage may destroy cultivated soils, largely through soil desertification.…”

Section: Introductionmentioning

confidence: 99%

Effects on Infiltration and Evaporation When Adding Rapeseed-Oil Residue or Wheat Straw to a Loam Soil

Xing

2017

Water

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Abstract:The application of additives (e.g., wheat straw (WS) or rapeseed-oil residue (RR)) to soils is a common agronomic practice, used for improving soil water retention. Through a laboratory investigation, this study examined the effects of RR and WS on infiltration, evaporation, water distribution, and water retention. The results indicated that the migration rate of the wetting front, as well as the accumulative infiltration and evaporation, decreased with the amount of applied additives. RR was more effective than WS for infiltration and evaporation suppression. Furthermore, in the Kostiakov model, the value of a decreased with an increasing amount of additive, becoming smaller than the corresponding control treatment (CK) value; by contrast, the value of n decreased with increasing amount of applied additive, remaining larger than the CK value. In the Rose model, the values of A for the soils mixed with additives were smaller than those of the CK, and decreased with increasing amount of additive. Moreover, compared with the CK, the maximum water content for the RR-applied soils increased by 17.84% after infiltration and by 47.66% after evaporation. In addition, the water retention coefficients (calculated as the soil moisture after evaporation divided by that after infiltration) for soils mixed with RR were the highest, indicating that RR is more effective than WS for improving the water retention of the soil layer.

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“…Most of the scholarly studies reviewed during the research focused on water system management, agriculture and food security (Bezborodov et al, 2010;Siegfried et al, 2012;Sommer et al, 2012;Tirado et al, 2010;Ndamani & Watanabe, 2017;Bobojonov & Aw-Hassan, 2014).…”

Section: Literature Reviewmentioning

confidence: 99%

How Might Climate Change Affect Microeconomic Wellbeing in Central Asia

Burkhanov

Saburova

2017

CBUP

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Climate change may pose serious challenges to the economies of Central Asian countries, but in-depth studies on a national level are lacking. The paper is aimed to contribute filling this gap and devoted to assessing the economic impacts of climate change in selected areas of Central Asia. The methods of the desk study and documental analysis are used to summarize the adverse effects of climate change in rural livelihoods. Moreover, the preliminary results of the survey conducted in selected regions of Fergana valley within MikroKlima project used as a corresponding data for economic impact analysis on a household level. The results reveal that the effects of unfavorable weather conditions uneven for short and long term, and across Central Asia. Moreover, the most potential damage from climate change will affect the rural population, and there is also a high positive correlation between water shortage, increased aridity, and poverty, aggravated by climate change. JEL Classification numbers: Q51, Q54, O11, O18; DOI: http://dx.doi.org/10.12955/cbup.v5.905

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Mulching and water quality effects on soil salinity and sodicity dynamics and cotton productivity in Central Asia

Cited by 148 publications

References 25 publications

Osmotic dilution for sustainable greenwall irrigation by liquid fertilizer: Performance and implications

Osmotic dilution for sustainable greenwall irrigation by liquid fertilizer: Performance and implications

Effects on Infiltration and Evaporation When Adding Rapeseed-Oil Residue or Wheat Straw to a Loam Soil

How Might Climate Change Affect Microeconomic Wellbeing in Central Asia

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