Effect of long-term saline mulched drip irrigation on soil-groundwater environment in arid Northwest China

Wang, Zaimin; Li, Zhaofeng; Zhan, Hongbin; Yang, S. J.

doi:10.1016/j.scitotenv.2022.153222

Cited by 17 publications

(12 citation statements)

References 40 publications

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“…The supply of fresh water resources has become severely insufficient as the social economy has developed, and the gap between the supply of and demand for fresh water resources is becoming increasingly apparent [1]. Irrigation with brackish water is a significant measure to address the scarcity of irrigation water resources [2,3]. While brackish water irrigation can provide the necessary water for agricultural growth, it also introduces salt into the soil, causing salt to build to various degrees and impairing crop growth [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Different Polyacrylamide Dosages on Soil Water Movement under Brackish Water Infiltration

Zhang

Wang

et al. 2022

Polymers

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The use of soil conditioners in conjunction with brackish water irrigation is critical for the efficient development and use of brackish water as well as the enhancement of the structure of saline soil and stimulating crop growth. This study investigated the effects of different polyacrylamide (PAM) dosages (0, 0.02%, 0.04%, and 0.06%) on the water flow properties of sandy loam during brackish water infiltration using one-dimensional vertical and horizontal soil column infiltration experiments. The results showed that: (1) PAM could lower the soil infiltration rate and increase soil water retention performance under brackish water infiltration conditions. (2) PAM had a significant effect on the parameters of the Philip and Kostiakov infiltration models. The soil sorption rate S and the empirical coefficient λ were the smallest, and the empirical index β was the largest when the PAM dosage was 0.04%. (3) PAM dosage displayed a quadratic polynomial connection with the soil saturated water content and the saturated hydraulic conductivity. The soil saturated water content was highest when the PAM dosage was 0.04%, the intake suction hd of the Brooks-Corey model increased by 15.30%, and the soil water holding capacity was greatly improved. (4) Soil treated with PAM could absorb more water under the same soil water suction, whereas the soil unsaturated hydraulic conductivity and its growth rate decreased. The soil saturated diffusion rate Ds, as well as the soil water diffusion threshold, rose. Finally, the 0.04% PAM dosage could improve soil hydrodynamic characteristics under brackish water infiltration, which is beneficial for the efficient utilization of brackish water.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Different Polyacrylamide Dosages on Soil Water Movement under Brackish Water Infiltration

Zhang

Wang

et al. 2022

Polymers

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“…On the other hand, the quality of groundwater is worse and worse. Human activities affect groundwater quality [ 14 ]. Due to the imperfect sewage treatment facilities, wastewater would pollute the surrounding surface water systems and soil [ 15 , 16 ].…”

Section: Related Workmentioning

confidence: 99%

Predicting Groundwater Indicator Concentration Based on Long Short-Term Memory Neural Network: A Case Study

Liu

et al. 2022

IJERPH

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Prediction of groundwater quality is an essential step for sustainable utilization of water resources. Most of the related research in the study area focuses on water distribution and rational utilization of resources but lacks results on groundwater quality prediction. Therefore, this paper introduces a prediction model of groundwater quality based on a long short-term memory (LSTM) neural network. Based on groundwater monitoring data from October 2000 to October 2014, five indicators were screened as research objects: TDS, fluoride, nitrate, phosphate, and metasilicate. Considering the seasonality of water quality time series data, the LSTM neural network model was used to predict the groundwater index concentrations in the dry and rainy periods. The results suggest the model has high accuracy and can be used to predict groundwater quality. The mean absolute errors (MAEs) of these parameters are, respectively, 0.21, 0.20, 0.17, 0.17, and 0.20. The root mean square errors (RMSEs) are 0.31, 0.29, 0.28, 0.27, and 0.31, respectively. People can be given early warnings and take measures according to the forecast situation. It provides a reference for groundwater management and sustainable utilization in the study area in the future and also provides a new idea for coastal cities with similar hydrogeological conditions.

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“…As agricultural activities in Northwest China have intensified in recent years, established soil cultivation methods that involve high-intensity utilization of arable land have caused frequent soil quality problems, including damage to soil structure and a decline in fertility [1][2][3] . In order to restore and improve soil strength, and achieve the strategic goal of "storing grain in the land", the Ministry of Agriculture of China established the "Pilot Program for Exploring the Implementation of Crop Rotation and Fallowing System" in 2016 in order to encourage local farmers to adopt a crop rotation system for cultivation 4 .…”

Section: Introductionmentioning

confidence: 99%

“…We compared samples and measurements from each area to investigate how the different production methods affected the stability of soil aggregates, and whether long-term maize continuous cropping caused degradation of local soil structure and/or soil fertility. Using these results, we aimed to (1) investigate the effects of long-term corn cropping and corn-alfalfa rotation on the basic physicochemical properties of aeolian sandy soils, and (2) to analyze how carbon and nitrogen content and storage patterns in soil aggregates change according to cropping pattern.…”

Section: Introductionmentioning

confidence: 99%

Effects of cropping patterns on the distribution, carbon contents, and nitrogen contents of aeolian sand–soil aggregates in Northwest China

Niu

et al. 2023

Preprint

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The long-term physicochemical responses of aeolian sandy soil aggregates to different crop rotation patterns are poorly understood. Here, we collected soil samples from the 0–20 cm tillage layer of continuous maize crop and alfalfa–corn rotation plots situated on the edge of the Zhangye Oasis, Northwest China. These samples were analyzed to quantify the influence that both cropping patterns have on the structure, carbon content, and nitrogen content of native aeolian sandy soils. When compared with long-term continuous maize cropping, planting using a maize–alfalfa rotation system significantly increased the mass fraction of macro-aggregates with sizes of >2 mm and 0.25–2 mm from 8.74 % to 12.08 % and 19.1 % to 21.21 %, respectively, but decreased the mass fraction of micro-aggregates (0.053–0.25 mm) from 11.57 % to 8.09 %. Further, there was no significant difference in the content of silt and clay particles between each system. The maize–alfalfa rotation increased the stability of aggregates from 0.32 to 0.37, representing an increase of 15.61 %. Soil organic carbon, inorganic carbon, and total nitrogen were mainly enriched in macro-aggregates with sizes of >2 mm, and silt and clay fractions for both cropping patterns. Implementation of a rotation pattern increased organic carbon contents by 27.21 %, 25.62 %, 26.67 %, and 27.58 %, inorganic carbon contents by 14.40 %, 4.53 %, 53.33 %, and 20.95 %, and total nitrogen contents by 14.40 %, 4.53 %, 53.33 %, and 20.95 % in aggregate particle sizes of >2 mm, 0.25–2 mm, 0.053–0.25 mm, and <0.053 mm, respectively, when compared to continuous corn cropping. Total nitrogen content increased by 29.72 %, 7.02 %, 4.17 %, and 50.00 %, respectively, for these particle size ranges. Maize–alfalfa crop rotation can therefore effectively improve soil aggregate composition and aggregate stability, alongside organic carbon content, inorganic carbon content, total nitrogen content, and their storage capacity. This system thus represents a soil cultivation technique that can increase the soil carbon sequestration capacity in the oasis zone of Northwest China.

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Effect of long-term saline mulched drip irrigation on soil-groundwater environment in arid Northwest China

Cited by 17 publications

References 40 publications

Experimental Investigation of the Different Polyacrylamide Dosages on Soil Water Movement under Brackish Water Infiltration

Experimental Investigation of the Different Polyacrylamide Dosages on Soil Water Movement under Brackish Water Infiltration

Predicting Groundwater Indicator Concentration Based on Long Short-Term Memory Neural Network: A Case Study

Effects of cropping patterns on the distribution, carbon contents, and nitrogen contents of aeolian sand–soil aggregates in Northwest China

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