Spatial and temporal characteristics of water requirement and water deficit of maize in Gansu Province from 1967 to 2017

Hua, 张华 Zhang; Hao, 王浩 Wang; Cungang, 徐存刚 Xu

doi:10.5846/stxb201901150125

Cited by 3 publications

(3 citation statements)

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“…Land reclamation inevitably exacerbates environmental sustainability risks, including groundwater scarcity and soil erosion, and will amplify desertification in arid and semiarid regions (Kuang et al, 2022). Indeed, large-scale cultivation of sand rice increases irrigation water consumption, and the current water supplement per hectare is approximately 1.80 × 10 3 m 3 year −1 , which is substantially lower than that of spring wheat (3.60 × 10 3 -4.68 × 10 3 m 3 year −1 ) in Gansu Province (Hu et al, 2011;Zhang & Wang, 2019). Refining field management and the timing coordination between temporal precipitation and irrigation could further improve the efficiency of irrigation water use.…”

Section: Ecological Sustainability and Sand Rice Cultivationmentioning

confidence: 99%

Sand rice, a promising future crop for desert and marginal lands in northern China

Zhao,

Ran,

Sun

et al. 2023

Grassland Research

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The pioneer Amaranthaceae species sand rice (Agriophyllum squarrosum) is an annual psammophyte that is widely distributed in the deserts and sand fields of northern China. The well‐balanced nutritional values, long consumption history, and extreme stress tolerance of sand rice have fascinated scientists, prompting its development as a climate‐resilient crop. Sand rice has been successfully introduced and cultivated on sandy and loess lands over the past decade, while large‐scale artificial planting has been carried out in the Ulan Buh and Tengger deserts. However, the yield is far below the maximum potential, as estimated by the highest yield per plant ever found in the Tengger desert during our survey of wild populations. The current domestication of sand rice relies mainly on natural selection and mutagenesis breeding. A few elite lines with modified agronomic traits, such as compact architecture, high productivity, reduced trichomes, and short plant stature, have been developed from natural populations and a chemical mutagenesis library. Breeding new cultivars and broader cultivation of sand rice in deserts and marginal lands will stimulate economic growth and diversify the food supply, especially for the area west of the Hu Huanyong Line, thus contributing to environmental sustainability in northern China.

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Section: Ecological Sustainability and Sand Rice Cultivationmentioning

confidence: 99%

Sand rice, a promising future crop for desert and marginal lands in northern China

Zhao,

Ran,

Sun

et al. 2023

Grassland Research

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“…The FAO divides crop fertility into four stages: early, developing, middle, and late. The crop fertility stages and crop coefficients used in this study were obtained from the research results of Zhang Hua [26,27], Tong Ling [28], and the FAO crop database, with appropriate adjustments. The crop sown areas were obtained from the Gansu Provincial Statistical Yearbook 2011-2021.…”

Section: Data Descriptionmentioning

confidence: 99%

Analyzing the Drivers of Agricultural Irrigation Water Demand in Water-Scarce Areas: A Comparative Study of Two Regions with Different Levels of Irrigated Agricultural Development

Hua,

Zhou,

Hao

et al. 2023

Sustainability

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Both the demand for agricultural irrigation and the level of water-saving technology in water-scarce regions have met food demand with technological progress and economic growth. There are differences in irrigation water demand drivers in regions with different levels of irrigated agricultural development. However, the relationship between related drivers in response to regional irrigation water demand is not fully understood. This study quantified the driving influence of six indicators, including technological progress, planting structure, water conservation management, economic development, planting scale, and consumption intensity, on agricultural irrigation water demand in JC (Jinchang) and WW (Wuwei), two cities in the Shiyang River Basin, from 2011 to 2020. The results shows that economic development is the main driver of the increase in irrigation water demand, with 29% and 43% driving contributions in JC and WW, respectively. Consumption intensity contributes the most to the decrease in irrigation water demand, with 31% and 23% of driving contribution in JC and WW, respectively. Cropping size has a greater positive drive on irrigation water demand in non-agricultural areas relative to agricultural areas. Planting structure has a more pronounced negative drive on irrigation water demand in agricultural areas relative to non-agricultural areas. In particular, relative to irrigated areas, the proportion of water-saving irrigated areas to the sown areas has a greater impact on changes in irrigation water demand, with a significant rebound effect when it exceeds 80%, so that blindly expanding water-saving irrigated areas will drive an increase in irrigation water demand. The results of this study can provide useful suggestions for agricultural water management in water-scarce areas with different levels of water-saving irrigation development, and realize the sustainable development of agriculture in water-scarce areas.

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“…The present simulations showed that irrigation amount of 650 mm-750 mm would provide the greatest cotton seed yield, gross and net income, whereas irrigation amounts of 500 mm-550 mm resulted in the greatest Nwp when T • air increased in the regions by 1.5 • C or 2.0 • C (Table 4). Wang et al [75] reported that the average water requirement of cotton (WRC) in southern Xinjiang from 1963 to 2012 ranged from 726 to 810 mm, with a decreasing trend in WRC at different cotton growth stages over the past 50 years. This trend was a similar trend in cotton water demand under warming of 1.5 • C and 2.0 • C. Compared to the results of Chen et al [42] in the same region, the optimal total irrigation amount for cotton under future climate scenarios would be reduced by 9% (50 mm).…”

Section: Optimal Irrigation Strategy For Cotton Under Future Climate ...mentioning

confidence: 99%

RZWQM2 Simulated Irrigation Strategies to Mitigate Climate Change Impacts on Cotton Production in Hyper–Arid Areas

Chen,

Dong,

Feng

et al. 2023

Agronomy

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Improving cotton (Gossypium hirsutum L.) yield and water use efficiency (WUE) under future climate scenarios by optimizing irrigation regimes is crucial in hyper-arid areas. Assuming a current baseline atmospheric carbon dioxide concentration (CO2atm) of 380 ppm (baseline, BL0/380), the Root Zone Water Quality Model (RZWQM2) was used to evaluate the effects of four climate change scenarios—S1.5/380 (∆Tair°=1.5 °C,∆CO2atm=0), S2.0/380 (∆Tair°=2.0 °C,∆CO2atm=0), S1.5/490 (∆Tair°=1.5 °C,∆CO2atm=+110 ppm) and S2.0/650 (∆Tair°=2.0 °C,∆CO2atm=+270 ppm) on soil water content (θ), soil temperature (Tsoil°), aboveground biomass, cotton yield and WUE under full irrigation. Cotton yield and irrigation water use efficiency (IWUE) under 10 different irrigation management strategies were analysed for economic benefits. Under the S1.5/380 and S2.0/380 scenarios, the average simulated aboveground biomass of cotton (vs. BL0/380) declined by 11% and 16%, whereas under S1.5/490 and S2.0/650 scenarios it increased by 12% and 30%, respectively. The simulated average seed cotton yield (vs. BL0/380) increased by 9.0% and 20.3% under the S1.5/490 and S2.0/650 scenarios, but decreased by 10.5% and 15.3% under the S1.5/380 and S2.0/380 scenarios, respectively. Owing to greater cotton yield and lesser transpiration, a 9.0% and 24.2% increase (vs. BL0/380) in cotton WUE occurred under the S1.5/490 and S2.0/650 scenarios, respectively. The highest net income ($3741 ha−1) and net water yield ($1.14 m−3) of cotton under climate change occurred when irrigated at 650 mm and 500 mm per growing season, respectively. These results suggested that deficit irrigation can be adopted in irrigated cotton fields to address the agricultural water crisis expected under climate change.

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Spatial and temporal characteristics of water requirement and water deficit of maize in Gansu Province from 1967 to 2017

Cited by 3 publications

References 0 publications

Sand rice, a promising future crop for desert and marginal lands in northern China

Sand rice, a promising future crop for desert and marginal lands in northern China

Analyzing the Drivers of Agricultural Irrigation Water Demand in Water-Scarce Areas: A Comparative Study of Two Regions with Different Levels of Irrigated Agricultural Development

RZWQM2 Simulated Irrigation Strategies to Mitigate Climate Change Impacts on Cotton Production in Hyper–Arid Areas

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