Changes in ecosystem services associated with planting structures of cropland: A case study in Minle County in China

Liu, Yaqun; Song, Wei; Mu, Fengyun

doi:10.1016/j.pce.2016.09.003

Cited by 31 publications

(17 citation statements)

References 58 publications

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“…As the volumes of rainfall and runoff water within the HRB are largest and concentrated in June, July, and August, such a change to crop planting structures would help to ease the imbalance between water supply and demand. At the same time, however, results show that IWR c values for corn were significantly higher than those for the other major crops; thus, a rapid expansion in the area of cultivated corn would only serve to intensify the water supply imbalance [44]. We argue that a continuous increase in the area of cultivated corn is not feasible; rather, it is crucial to minimize the cultivation of water-intensive crops and the expansion of cultivated land, emphasizing instead the husbandry of plants that require less water [45,58,59].…”

Section: Policy Implicationsmentioning

confidence: 90%

“…The rapid expansion of agricultural oases in recent decades, as well as expansion and changes to crop planting structures, have led to rapidly increasing demands for agricultural water in the HRB [44][45][46]. At the same time, however, the water supply of this region has not kept pace with demand, even though it has increased slowly and intermittently as climate has become warmer and wetter.…”

Section: Introductionmentioning

confidence: 99%

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Spatiotemporal Patterns of Crop Irrigation Water Requirements in the Heihe River Basin, China

Liu

Song

Deng

2017

Water

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Abstract:Agricultural expansion, population growth, rapid urbanization, and climate change have all significantly impacted global water supply and demand and have led to a number of negative consequences including ecological degradation and decreases in biodiversity, especially in arid and semi-arid areas. The agricultural sector consumes the most water globally; crop irrigation alone uses up more than 80% of available agricultural water. Thus, to maintain sustainable development of the global economy and ecosystems, it is crucial to effectively manage crop irrigation water. We focus on the arid and semi-arid Heihe River Basin (HRB), China, as a case study in this paper, extracting spatiotemporal information on the distribution of crop planting using multi-temporal Thematic Mapper and Enhanced Thematic Mapper Plus (TM/ETM+) remote sensing (RS) images. We estimate the spatiotemporal crop irrigation water requirements (IWR c ) using the Food and Agriculture Organization of the United Nations (FAO) Penman-Monteith method and reveal variations in IWR c . We also analyze the impact of changes in crop planting structure on IWR c and discuss strategies for the rational allocation of irrigation water as well as policies to alleviate imbalance between water supply and demand. The results of this study show that effective rainfall (ER) decreases upstream-to-downstream within the HRB, while crop evapotranspiration under standard conditions (ET c ) increases, leading to increasing spatial variation in IWR c from zero up to 150 mm and between 300 and 450 mm. Data show that between 2007 and 2012, annual mean ER decreased from 139.49 to 106.29 mm, while annual mean ET c increased from 483.87 to 500.38 mm, and annual mean IWR c increased from 339.95 to 370.11 mm. Data show that monthly mean IWR c initially increased before decreasing in concert with crop growth. The largest values for this index were recorded during the month of June; results show that IWR c for May and June decreased by 8.14 and 11.67 mm, respectively, while values for July increased by 5.75 mm between 2007 and 2012. These variations have helped to ease the temporal imbalance between water supply and demand. Mean IWR c values for oilseed rape, corn, barley, and other crops all increased over the study period, from 208. 43, 349.35, 229.26, and 352.85 mm, respectively, in 2007, to 241.81, 393.10, 251.17, and 378.86 mm, respectively, in 2012. At the same time, the mean IWR c of wheat decreased from 281.53 mm in 2007 to 266.69 mm in 2012. Mainly because of changes in planting structure, the total IWR c for the HRB in 2012 reached 2692.58 × 10 6 m 3 , an increase of 332.16 × 10 6 m 3 (14.07%) compared to 2007. Data show that 23.11% (76.77 × 10 6 m 3 ) of this increase is due to crop transfers, while the remaining 76.89% (255.39 × 10 6 m 3 ) is the result of the rapid expansion of cultivated land. Thus, to maintain both the sustainable development and ecological security of the HRB, it is crucial to efficiently manage and utilize agricultural water in light of spat...

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Section: Policy Implicationsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Patterns of Crop Irrigation Water Requirements in the Heihe River Basin, China

Liu

Song

Deng

2017

Water

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“…In this study, agriculture in its narrow sense is adopted and refers to the cultivation of farm crops [48]. Influenced by market demand for more commercial crops, regional comparative advantages and government policies, remarkable ASC have been witnessed in China and there are four stages of policy adjustment on agricultural structure since 1990 [9,29,49,50].…”

Section: The Evolution Of Asc and Eiap In Chinamentioning

confidence: 99%

“…Since 1978, the main problem of China's agriculture has shifted from insufficient supply to structural disequilibrium [29]. As a direct response to changing market demand, regional comparative advantages, and government policies, China's agricultural structure has changed significantly [9,29]. The sown proportion of grain crops decreased from 78.05% in 1991 to 69.38% in 2016, while that of vegetable increased from 4.55% to 13.70%.…”

Section: Introductionmentioning

confidence: 99%

Structural Change and Its Impact on the Energy Intensity of Agricultural Sector in China

Han

2018

Sustainability

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China’s agricultural structure has undergone significant changes for the past four decades, mainly presenting as the fall of sown proportion of grain crops and the rise of vegetables, as has its energy consumption. Employing the panel data on 30 provinces during 1991–2016, this paper empirically explores the impact of agricultural structure changes (ASC) on the energy intensity of agricultural production (EIAP), direct energy intensity of agricultural production (DEIAP) and indirect energy intensity of agricultural production (IEIAP) in China. Besides, the regional heterogeneity of such impact is examined. The results show that: (1) ASC increases EIAP and IEIAP significantly, while ASC decreases DEIAP, which is explained by the structural effect and different planting modes of different crops; (2) the impact in the three administrative regions is similar to national situation, except the impact of ASC on DEIAP in the West Region, which is explained by regional differences of vegetable mechanization; (3) the result of the six vegetable production regions reveals greater regional heterogeneity, and this is attributed to the scale economy effect and the incremental effect of vegetable mechanization; and (4) fuel price, income, agricultural labor, old dependency ratio, and fiscal expenditure have different but significant impacts on EIAP, DEIAP, and IEIAP. Finally, some policy implications are given.

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“…NPP supplies food, fuel, and fiber for the growing human population (Potter et al, ; Running et al, ), and provides energy and substances for most biological processes in terrestrial and aquatic ecosystems (Chitale, Tripathi, Behera, Behera, & Tuli, ; Lieth & Whittaker, ), which is fundamental to human survival and development, food security, and biodiversity conservation. Furthermore, NPP supports the regulation and cultural services of ecosystem, for example, climate regulation, air purification, soil erosion control, aesthetic value, leisure, and ecotourism (Liu, Song, & Mu, ; MA, ; Milesi et al, ). Thus, NPP is an important part of carbon cycle, carbon budget, and global changes, and an effective indicator for ecosystem sustainability (Cramer & Field, ; Field, Behrenfeld, Randerson, & Falkowski, ).…”

Section: Introductionmentioning

confidence: 99%

Response of net primary production to land use and climate changes in the middle‐reaches of the Heihe River Basin

Xiao

Jiang

et al. 2019

Ecology and Evolution

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Net primary production (NPP) supplies matter, energy, and services to facilitate the sustainable development of human society and ecosystem. The response mechanism of NPP to land use and climate changes is essential for food security and biodiversity conservation but lacks a comprehensive understanding, especially in arid and semi‐arid regions. To this end, taking the middle‐reaches of the Heihe River Basin (MHRB) as an example, we uncovered the NPP responses to land use and climate changes by integrating multisource data (e.g., MOD17A3 NPP, land use, temperature, and precipitation) and multiple methods. The results showed that (a) land use intensity (LUI) increased, and climate warming and wetting promoted NPP. From 2000 to 2014, the LUI, temperature, and precipitation of MHRB increased by 1.46, 0.58°C, and 15.76 mm, respectively, resulting in an increase of 14.62 gC/m 2 in annual average NPP. (b) The conversion of low‐yield cropland to forest and grassland increased NPP. Although the widespread conversion of unused land and grassland to cropland boosted both LUI and NPP, it was not conducive to ecosystem sustainability and stability due to huge water consumption and human‐appropriated NPP. Urban sprawl occupied cropland, forest, and grassland and reduced NPP. (c) Increase in temperature and precipitation generally improved NPP. The temperature decreasing <1.2°C also promoted the NPP of hardy vegetation due to the simultaneous precipitation increase. However, warming‐induced water stress compromised the NPP in arid sparse grassland and deserts. Cropland had greater NPP and NPP increase than natural vegetation due to the irrigation, fertilizers, and other artificial inputs it received. The decrease in both temperature and precipitation generally reduced NPP, but the NPP in the well‐protection or less‐disturbance areas still increased slightly.

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Changes in ecosystem services associated with planting structures of cropland: A case study in Minle County in China

Cited by 31 publications

References 58 publications

Spatiotemporal Patterns of Crop Irrigation Water Requirements in the Heihe River Basin, China

Spatiotemporal Patterns of Crop Irrigation Water Requirements in the Heihe River Basin, China

Structural Change and Its Impact on the Energy Intensity of Agricultural Sector in China

Response of net primary production to land use and climate changes in the middle‐reaches of the Heihe River Basin

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