Experiences and challenges of agricultural development in an artificial oasis: A review

Wang, Tianyu; Wang, Zhenhua; Guo, Li; Zhang, Jinzhu; Li, Wenhao; He, Huaijie; Zong, Rui; Wang, Dongwang; Jia, Zhang; Wen, Yali

doi:10.1016/j.agsy.2021.103220

Cited by 47 publications

(22 citation statements)

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“…Because of water limitations (Maeda et al 2011, Mekki et al 2013, some oases have experienced a series of ecological problems, such as groundwater reduction, environmental degradation, and renewed desertification (Maeda et al 2011, Wei et al 2018a, Huang et al 2021. These problems profoundly affect the stability of oasis ecosystems (Zhou et al 2017), while also causing great challenges to the stable socio-economic development and food security of the region (Wang et al 2021, Li et al 2021b, seriously threatening human well-being in these regions.…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal patterns of oasis dynamics in China’s drylands between 1987 and 2017

Chen

Wang

Liu

et al. 2022

Environ. Res. Lett.

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Oases are among the most productive and vulnerable ecosystems on drylands as well as central areas of human life and economic development. In China, oasis expansion and degradation are directly related to the survival and development of tens of millions of inhabitants who live within them, profoundly affecting human well-being. However, our understanding of the spatiotemporal dynamics of China’s oases has been limited. This creates a challenge to accurately assess the environmental impacts of oasis dynamics and sustainable oasis development. Here we analyzed Landsat images (5 TM, 7 ETM+, and 8 OIL, ∼61 900 images) over the period 1987–2017, and we produced annual maps of China’s oases (30 m spatial resolution) using trajectories and spectral-temporal segmentation algorithm (LandTrendr) and machine-learning methods (Random Forest). We found that oasis areas increased significantly between 1987 and 2017 (+8.82 Mha). Grasslands and croplands expanded the most, and reclamation of deserts and grasslands made cropland the largest gainer. At the provincial scale, oasis expansion in Inner Mongolia and Qinghai was mainly attributed to grassland restoration. In Xinjiang, Gansu, and Ningxia, reclamation of croplands was also an important factor in addition to grassland restoration. With the expansion of the oasis ∼73.36% of areas showed decreasing trends of soil moisture, and even desertification in some areas. The overexpansion of oases might cause a great challenge to regional water security. Our dataset and results can provide a basis for identifying trade-off areas/regions between development benefits and environmental impacts, helping policymakers to identify high-priority areas for intervention and reasonably plan land-use spatial structure in oasis areas for sustainable development of oases.

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Section: Introductionmentioning

confidence: 99%

Spatio-temporal patterns of oasis dynamics in China’s drylands between 1987 and 2017

Chen

Wang

Liu

et al. 2022

Environ. Res. Lett.

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“…In their research papers, T. Wang, Wang, et al. (2021) investigated soil salinity under long‐term irrigation using regression, water‐salt balance, and geostatistical analysis and found that shallow groundwater depth and salinity are the main factors influencing soil salinity. Furthermore, as indicated in the study conducted by Minhas et al.…”

Section: Discussionmentioning

confidence: 99%

“…The relationship between the process of salinization of irrigated land and groundwater table and its dynamics was studied by T. Wang, Wang, et al. (2021). Important factors affecting the condition of irrigated lands are the operation of drainage systems and the intensity of agricultural production (Minhas et al., 2019; Mohanavelu et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

Assessing the intensity of reduction and restoration of irrigated lands’ state in the Republic of Bashkortostan

Snezhko,

Mikheev,

Benin

et al. 2023

J. Plant Nutr. Soil Sci.

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BackgroundIrrigation of lands over time leads to such negative processes as land salinization and waterlogging, reduction of soil fertility, changes in the chemical composition of groundwater, and the emergence of linear and irrigation erosion. The land improvement (ameliorative) categories adopted in Russia and several post‐Soviet countries determine their suitability for agricultural use and the focus of measures to preserve potential soil fertility.AimsThe study aims to build a mathematical model to assess the intensity of the reduction and restoration of irrigated lands’ state in the Republic of Bashkortostan.MethodsThe methods of the theory of random processes are proposed to estimate the intensity of reduction and restoration of irrigated lands’ state on the territory of the Republic.ResultsAs a result of the calculations, the values of intensities characterizing changes in the state of land in the region were obtained. The practical significance of the developed model consists of the possibility of short‐term forecasting and determination of the necessary intensity of land quality restoration taking into account planned values during the given period.ConclusionsThe offered indicator of intensity and the method of its definition can be used in research of similar processes proceeding on agricultural lands within the limits of large spatial units.

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“…Xinjiang is located in the inland arid area of northwest China, with a low level of rainfall and a substantial amount of evaporation. It is the largest cotton production base in China (Liu et al 2020; Wang et al 2021a). The area of saline-alkali cultivated land in Xinjiang is 1.82×10 6 ha, accounting for 1/3 of the area of saline-alkali soil in China (Shi et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Effects of smashing ridge tillage and spring irrigation combination treatment on water, salinity and cotton yield in drip irrigation cotton fields

Xue

Liu²,

Tang³

et al. 2023

Preprint

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Background and Aims Soil salinization in Xinjiang seriously restricts the growth of cotton. In recent years, smashing ridge tillage technology has been introduced into saline-alkali land management. However, the effects of different smashing ridge tillage depths and spring irrigation amounts on soil water and salt and cotton yield are not clear. Methods This study was conducted in Tumushuk, Xinjiang, through a two-year field experiment (2021 and 2022), to analyze the effects of smashing ridge tillage depth (F1: 40, F2: 60 and F3: 80 cm) and spring irrigation amount (W1: 2400, W2: 3000 and W3: 3600 m3/ha) on saline cotton fields, the optimal smashing ridge tillage depth and spring irrigation amount zone were determined by the multi-objective optimization method. Results The results reveal the ability of the smashing ridge tillage and spring irrigation combination treatment to significantly increase soil moisture (P<0.01) and reduce soil salinity (P<0.01), and altered of salinization degree from severe to moderate and mild. Moreover, the soil salt ions (Na+, Cl-, SO42- and Ca2+) were effectively leached, and the soil hydrochemical species gradually changed from SO42-—Ca2+·Na+ to SO42-·HCO3-—Ca2+. The emergence rate and cotton yield significantly increased following the application of smashing ridge tillage and spring irrigation (P<0.05), the average yield was maximized under the W2F2 treatment (6025 kg/ha) in two years. The yield, economic benefit, water productivity and salt leaching efficiency were maximized at the spring irrigation amount of 2862-2923 m3/ha and smashing ridge tillage depth of 71-73 cm. The results of this study provide scientific basis and technical guidance for the improvement of saline-alkali land in southern Xinjiang.

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Experiences and challenges of agricultural development in an artificial oasis: A review

Cited by 47 publications

References 100 publications

Spatio-temporal patterns of oasis dynamics in China’s drylands between 1987 and 2017

Spatio-temporal patterns of oasis dynamics in China’s drylands between 1987 and 2017

Assessing the intensity of reduction and restoration of irrigated lands’ state in the Republic of Bashkortostan

Effects of smashing ridge tillage and spring irrigation combination treatment on water, salinity and cotton yield in drip irrigation cotton fields

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