Improving agricultural water productivity to ensure food security in China under changing environment: From research to practice

Kang, Shaozhong; Hao, Xinmei; Du, Taisheng; Tong, Ling; Su, Xiaoling; Lu, Hsiu-Ying; Li, Xin; Huo, Zailin; Li, Sien; Ding, Risheng

doi:10.1016/j.agwat.2016.05.007

Cited by 494 publications

(210 citation statements)

References 44 publications

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“…Water productivity in our IFs was much lower (0.5 kg barley per cubic meter of water) than in Australia (~ 3.5 kg/m 3 , Khan et al, 2010) or Portugal (1.8 kg/m 3 , Paredes et al, 2017). Water productivity was also high in China for grain crops (~ 1.58-1.72 kg/m 3 ) by employing novel irrigation methods (Kang et al, 2016). It should be noted that only water from wells were considered in the analysis of IFs to reach correct assessment of energy efficiency and productivity.…”

Section: Output and Input Energy Flow In Barley Farming Systemsmentioning

confidence: 88%

Environmental impacts of irrigated and rain-fed barley production in Iran using life cycle assessment (LCA)

Houshyar

2017

Span. j. agric. res.

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Current intensive grain crops production is often associated with environmental burdens. However, very few studies deal with the environmental performance of both current and alternative systems of barley production. This study was undertaken to evaluate energy consumption and environmental impacts of irrigated and rain-fed barley production. Additionally, three alternative scenarios were examined for irrigated barley fields including conservation tillage and biomass utilization policies. The findings showed that around 25 GJ/ha energy is needed in order to produce 2300 kg/ha irrigated barley and 13 GJ/ha for 1100 kg/ha rain-fed barley. Life cycle assessment (LCA) results indicated that irrigated farms had more environmental impacts than rain-fed farms. Electricity generation and consumption had the highest effect on the abiotic depletion potential, human toxicity potential, freshwater and marine aquatic ecotoxicity potential. However, alternative scenarios revealed that using soil conservation tillage systems and biomass consumption vs. gas for electricity generation at power plants can significantly mitigate environmental impacts of irrigated barley production similar to the rain-fed conditions while higher yield is obtained.Additional keywords: Hordeum vulgare L.; energy use efficiency; energy productivity; global warming potential.

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Section: Output and Input Energy Flow In Barley Farming Systemsmentioning

confidence: 88%

Environmental impacts of irrigated and rain-fed barley production in Iran using life cycle assessment (LCA)

Houshyar

2017

Span. j. agric. res.

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“…Minqin is located in the downstream alluvial plain of the Shiyang River which is a typical inland river. In average, the total water resources in the Shiyang River Basin is 1.661 × 10 9 m 3 , including streamflow of 1.561 × 10 9 m 3 and groundwater recharge of 1.00 × 10 8 m 3 [3,31]. As one of the commodity grain bases in the province, Minqin largely relies on irrigated agriculture for its economy.…”

Section: Study Area and Problem Statementmentioning

confidence: 99%

“…In semi-arid and arid areas which heavily rely on irrigated agriculture, the role of agricultural water is even more critical. For example, the share of water used for agriculture reached as much as over 90% in the desert oases of northwestern China, which is one of the most water-starved and ecologically vulnerable regions, nationally and globally [2,3]. The focal issue in such arid areas is water deficit, due to poor natural water endowment as well as mismanagement of water and water-related resources.…”

Section: Introductionmentioning

confidence: 99%

Optimal Use of Agricultural Water and Land Resources through Reconfiguring Crop Planting Structure under Socioeconomic and Ecological Objectives

Tan

Shan

2017

Water

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Many economic, social and ecological problems can be attributed to the scarcity and mismanagement of water and land resources. In this study, a multi-objective fuzzy-robust programming (MOFRP) method was developed for supporting the optimal use of land and water resources in agriculture. MOFRP improved existing methods through taking ecological services of crop cultivation into account. It was also capable of reflecting fuzziness in preferences, priorities and parameters that were largely neglected in previous agricultural decision making. This method was applied to address a case in arid northwestern China. Optimal plans of crop cultivation reconfiguration were generated for sustaining local development under economic, ecological and social objectives as well as physical restraints in water and land resources. Compared to the status quo, the optimized plan would increase economic and ecological benefits by 12.2% and 18.8%, respectively. The efficiency of irrigation water could also be enhanced with the economic and ecological benefits per unit water being raised and the water consumption per unit land being reduced. The comparisons of the MOFRP model to four alternatives validated that it was capable of achieving satisfactory benefits and reducing system-violation risks without neglecting valuable uncertain information and ecological services of crops. The proposed method was also applicable to other multi-objective management problems under uncertainty without loss of generality.

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“…The sustainable development of agriculture faces severe challenges [2], and water conservation is one of the key measures to ease the pressure of current agricultural water demand. In China, agricultural water use accounts for 63% of total water use [3], with irrigation water use accounting for more than 90% of agricultural water use [4]. Therefore, the first thing necessary for agricultural water-saving is the saving of water during irrigation.…”

Section: Introductionmentioning

confidence: 99%

Assessing Factors Driving the Change of Irrigation Water-Use Efficiency in China Based on Geographical Features

Fang

Jia

et al. 2017

Water

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Abstract:Changes in irrigation water-use efficiency are related closely to agricultural development. Clarifying the driving factors of irrigation water-use efficiency change at different agricultural development stages is beneficial for buffering the contradiction between the protection of water resources and massive agricultural water consumption. It also has theoretical and application value when it comes to elucidating the driving characteristics of spatial changes in irrigation water-use efficiency observed among the different provinces of China. This paper analyzes driving factors of irrigation water-use change based on a study of literature and a field survey. It selects 21 indices from five aspects of climatic change, resource endowment, economic situation, technological level, and management mode as the system of driving factors for irrigation water-use change. This article then uses statistical data on economic and social development in the 31 provinces of China in 2009, and applies the principal component analysis (PCA) method to extract the main driving factors affecting irrigation water-use efficiency change. After calculation of factor scores, clustering analysis is conducted on the 31 provinces to explore regional differences among the driving factors of irrigation water-use efficiency change. The results show that these can be attributed to the factors of agricultural economic development, water-saving irrigation technology, water resource endowment, and dissipation. The 31 provinces can be divided into five types: agricultural economy strong driving type; agricultural economy dominant type; industrial economy dominant type; agriculture strong development type; and coordinated driving type. In highly agricultural provinces, mature irrigation district management and water-saving measures influence the efficiency of irrigation water-use, making these strong positive driving factors. In highly industrial provinces, changes in irrigation water-use efficiency are mainly driven by economic development and structural adjustment, making these weak driving factors.

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Improving agricultural water productivity to ensure food security in China under changing environment: From research to practice

Cited by 494 publications

References 44 publications

Environmental impacts of irrigated and rain-fed barley production in Iran using life cycle assessment (LCA)

Environmental impacts of irrigated and rain-fed barley production in Iran using life cycle assessment (LCA)

Optimal Use of Agricultural Water and Land Resources through Reconfiguring Crop Planting Structure under Socioeconomic and Ecological Objectives

Assessing Factors Driving the Change of Irrigation Water-Use Efficiency in China Based on Geographical Features

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