Evaluation of Soil Environment after Saline Soil Reclamation of Xinjiang Oasis, China

In this study, gypsum, a common amendment for sodic soil reclamation, was compared with langbeinite, a lesser used and known mineral. A column leaching experiment using sodic water was conducted on a sodic, non-saline soil (fine, montmorillonitic, thermic Ruptic Vertic Albaqualf) dominated by smectitic clays. Soil was amended with gypsum and langbeinite at rates equivalent to exchangeable Na at soil depths of 0.15 and 0.30 m. The soil water at depths of 0.75, 0.15, and 0.225 m and the effluent from each column were collected at intervals of 12 h and analysed for soluble bases. Sodium adsorption ratio (SAR) was calculated from soluble salts. Saturated hydraulic conductivity (Ksat) was calculated. At the end of the experiment, soil samples were removed from each column in 4 depth increments. Significantly less exchangeable Na and lower SAR of the soil water was found in the lower sections of the soil columns, and Ksat was greater for the amended treatments than for the control. High solubility of the langbeinite resulted in the highest Ksat value, with possible increase in electrolyte concentration and reduction of clay swelling and dispersion in the first 12 h. However, there was no significant difference in reclamation efficiency between equivalent rates of 2 amendments throughout the experiment. This experiment indicated that factors influencing the decision about using either amendment should be availability of the product, the seasonal fluctuation in price, required reclamation time, and the crop needs for Ca or Mg and K.

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Impact of Waterlogged Saline Soil Reclamation on Land Productivity and Farm Income — An Economic Study from Haryana

Agricultural Economics Research Review ◽

10.5958/0974-0279.2015.00032.4 ◽

2015 ◽

Vol 28 (conf) ◽

pp. 177 ◽

Cited By ~ 2

Author(s):

R. Raju ◽

R.S. Tripathi ◽

K. Thimmappa ◽

Parveen Kumar ◽

Satyendra Kumar

Keyword(s):

Saline Soil ◽

Soil Reclamation ◽

Farm Income ◽

Land Productivity ◽

Economic Study

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EVOLUTION OF THE HUMUS CLAYEY MATERIAL OF THE CHERNOZEM HORIZON DURING LAND RECLAMATION OF SOLONETZES BY GROUNDING

Dokuchaev Soil Bulletin ◽

10.19047/0136-1694-2011-68-19-28 ◽

2011 ◽

pp. 19-28

Author(s):

N. Chizhikova ◽

N. Khitrov ◽

Yu. Cheverdin

Keyword(s):

Land Reclamation ◽

Saline Soil ◽

Soil Surface ◽

Specific Electrical Conductivity ◽

Soil Reclamation ◽

Disordered Structure ◽

Clayey Material ◽

Highly Dispersed ◽

Mineral Components ◽

Water Saturated

Under the influence of the saline process (sodium exchange rate of 5-15% and specific electrical conductivity of the extract from the water-saturated paste ECse < 2 dSm/m) the well aggregated black earth material used for soil reclamation by means of hydromorphous black earth salt complexes starts to turn into a peptized state and is evolutionarily transformed into a texture-differentiated profile of saline soil. Part of the previously aggregated silt passes to the water-performed state and begins to move down the profile from 0-4 cm layer. Water-performed sludge consists of highly ordered complex mixed mica-smektite formations with a high content of smectite packets, hydro-mica, kaolinite, chlorite, as well as highly dispersed quartz. A distinctive feature of the soil surface horizons of the solonetz complex is the increased content of highly dispersed quartz of micron dimension. The composition of mineral components in the aggregated muds remains the same, but the share of hydro-mica increases, and mixed-layer mica-smektites have a more perfect structure due to less disordered structure in crystallites. The share of finely dispersed quartz in the aggregated silt fraction is less than that of water-peptized silt, and is more similar to that of loess-like loess-like loam, which is a soil-forming rock.

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Seismic Yield Strength of Reinforced Concrete Bridge Piers in a Saline Soil Environment

Journal of Performance of Constructed Facilities ◽

10.1061/(asce)cf.1943-5509.0001357 ◽

2020 ◽

Vol 34 (2) ◽

pp. 04019114

Author(s):

Chang-wang Yan ◽

Jian-jun Zhao ◽

Shu-guang Liu ◽

Ju Zhang

Keyword(s):

Reinforced Concrete ◽

Yield Strength ◽

Saline Soil ◽

Bridge Piers ◽

Concrete Bridge ◽

Soil Environment ◽

Reinforced Concrete Bridge

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Seismic yield displacement of reinforced concrete bridge pier columns in saline soil environment

Advances in Structural Engineering ◽

10.1177/1369433219846962 ◽

2019 ◽

Vol 22 (12) ◽

pp. 2583-2593

Author(s):

Changwang Yan ◽

Jianjun Zhao ◽

Shuguang Liu ◽

Ju Zhang

Keyword(s):

Corrosion Rate ◽

Axial Compression ◽

Compression Ratio ◽

Saline Soil ◽

Bridge Pier ◽

Concrete Bridge ◽

Soil Environment ◽

Reinforced Concrete Bridge ◽

Axial Compression Ratio ◽

Yield Displacement

Corrosion of bridge pier columns in saline soil environment is inevitable, resulting in a gradual decrease in seismic yield displacement. In this study, 10 reinforced concrete bridge pier columns were fabricated, and seismic yield displacement in the saline soil environment was studied. Electrochemical corrosion tests and low-cycle repeated loading tests were carried out. The axial compression ratio and corrosion rate are the main parameters considered in this article. The seismic yield displacement test value of the pier column is determined based on the energy method. Using the static method, the theoretical expression of the earthquake yield displacement is derived. According to our results, when the corrosion rate is constant, the axial compression ratio is within a certain range, and the seismic yield displacement of the pier increases with the increase in the axial compression ratio. Similarly, when the axial compression ratio is constant, the seismic yield displacement decreases as the corrosion rate increases. By comparing experimental results with calculation results, our mathematical expressions have been shown to be effective in predicting seismic yield displacements of pier columns at different times in saline soil environments.

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Coastal Mudflat Saline Soil Amendment by Dairy Manure and Green Manuring

International Journal of Agronomy ◽

10.1155/2017/4635964 ◽

2017 ◽

Vol 2017 ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

Yanchao Bai ◽

Yiyun Yan ◽

Wengang Zuo ◽

Chuanhui Gu ◽

Weijie Xue ◽

...

Keyword(s):

Soil Amendment ◽

Organic Amendment ◽

Saline Soil ◽

Chemical Properties ◽

Dairy Manure ◽

Soil Reclamation ◽

Green Manures ◽

Available N ◽

Green Manuring ◽

Innovative Solution

Dairy manure or green manuring has been considered as popular organic amendment to cropland in many countries. However, whether dairy manure combined with green manuring can effectively amend mudflat saline soil remains unclear. This paper was one of first studies to fill this knowledge gap by investigating impact of dairy manure combined with green manuring on soil chemical properties of mudflat saline soil. Dairy manure was used by one-time input, with the rates of 0, 30, 75, 150, and 300 t ha−1, to amend mudflat saline soil. Ryegrass,Sesbania, and ryegrass were chosen as green manures for three consecutive seasons, successively planted, and tilled, and maize was chosen as a test crop. The results indicated that one-time application of dairy manure enhanced fertility of mudflat saline soil and supported growth of ryegrass as the first season green manure. By the cycles of the green manuring, it rapidly improved the chemical properties of mudflat saline soil by decreasing soil salinity and pH and increasing soil organic carbon and available N and P, which promoted growth of maize. Dairy manure combined with green manuring can be applied for mudflat saline soil amendment, which provides an innovative solution for mudflat saline soil reclamation, dairy manure disposal, and resource recycling.

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