Research on the Strategy for Improving Cultivated Land Quality in China

Zhang, Hongqi; Tan, Minghong; Kong, Xiangbin; Xu, Youjie; Xu, Er-qi; Shang, Erping

doi:10.15302/j-sscae-2018.05.003

Cited by 6 publications

(4 citation statements)

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“…Furthermore, the predicted cropland area decreases below the least cultivated land area (LCLA) target (Text S7) after 2058 using the conventional method, whereas this phenomenon does not occur in the DLUCP model (Figure S17b). The LCLA target is another regulation besides PBF, which was put forward in the National Land Use Planning Outline to ensure food security in China, which cannot be disrupted unless of necessary construction requirements. ,, Linear extrapolation was used to predict the changes of the LCLA target because it is widely used in land-use change prediction studies, which is convenient and free of using too many data. − The improvement of the DLUCP model compared to the conventional method could be explained by the fact that the PBF constraint in the DLUCP model was refined to each SCU rather than using only the overall PBF constraint in the conventional method. Thus, all the SCUs would satisfy the requirement of the PBF constraint, and the predicted results would be more realistic.…”

Section: Resultsmentioning

confidence: 99%

“…The LCLA target is another regulation besides PBF, which was put forward in the National Land Use Planning Outline to ensure food security in China, which cannot be disrupted unless of necessary construction requirements. 33,34,45 Linear extrapolation was used to predict the changes of the LCLA target because it is widely used in landuse change prediction studies, which is convenient and free of using too many data. 46−48 The improvement of the DLUCP model compared to the conventional method could be explained by the fact that the PBF constraint in the DLUCP model was refined to each SCU rather than using only the overall PBF constraint in the conventional method.…”

Section: Model Calibration and Validationmentioning

confidence: 99%

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A Declining Trend in China’s Future Cropland-N₂O Emissions Due to Reduced Cropland Area

Liu

Zhou

Huang

et al. 2021

Environ. Sci. Technol.

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Croplands are the largest anthropogenic source of nitrous oxide (N2O), a powerful greenhouse gas that contributes to the growing atmospheric N2O burden. However, few studies provide a comprehensive depiction of future cropland-N2O emissions on a national scale due to a lack of accurate cropland prediction data. Herein, we present a newly developed distributed land-use change prediction model for the high-precision prediction of national-scale land-use change. The high-precision land-use data provide an opportunity to elucidate how the changes in cropland area will affect the magnitude and spatial distribution of N2O emissions from China’s croplands during 2020–2070. The results showed a declining trend in China’s total cropland-N2O emissions from 0.44 ± 0.03 Tg N/year in 2020 to 0.39 ± 0.07 Tg N/year in 2070, consistent with a cropland area reduction from (1.78 ± 0.02) × 108 ha to (1.40 ± 0.15) × 108 ha. However, approximately 31% of all calculated cities in China would emit more than the present level. Furthermore, different land use and climate change scenarios would have important impacts on cropland-N2O emissions. The Grain for Green Plan implemented in China would effectively control emissions by approximately 12%.

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Section: Resultsmentioning

confidence: 99%

Section: Model Calibration and Validationmentioning

confidence: 99%

A Declining Trend in China’s Future Cropland-N₂O Emissions Due to Reduced Cropland Area

Liu

Zhou

Huang

et al. 2021

Environ. Sci. Technol.

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“…With rapid industrialization and urbanization, China's farmland is decreasing year by year, and the quality of farmland is seriously degraded (Liang et al, 2020). As a result, the farmland resources face unprecedented pressure on food production (Zhang et al, 2018;Yun et al, 2019). Since 1990, the national farmland area had increased from 95.67 million ha to 134.88 million ha in 2017.…”

Section: Changes In the Domestic Market Increase Food Demand Pressurementioning

confidence: 99%

China’s food security situation and key questions in the new era: A perspective of farmland protection

et al. 2022

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As the world's largest developing country, the ability of China's agricultural resource utilization to effectively support the current and future food security goals has been affected by a variety of factors (e.g., transformed supply channels, tightening international situation and frequent emergencies) in recent years and has attracted extensive attention from the academic community subject to multiple factors. This study uses literature review, statistical analysis, and spatial analysis methods to systematically explore China's food security situation in the context of farmland resource constraints. It is found that the demand-side pressures such as demographic changes, social class differentiation, and dietary structure adjustments derived from economic growth and rapid urbanization have placed extremely high expectations on food supply. However, the quantitative restrictions, utilization ways, and health risks of farmland resources on the supply side constitute a huge hidden concern that affects the stability of food production. Although China's farmland protection system is undergoing a transition from focusing on quantity management to sustainable use, the matching and coordinating demand pressure and supply capacity for food security is unbalanced. Therefore, facing uncertain future development scenarios, policymakers should focus on building a resilient space for China's farmland protection to withstand the interference of major emergencies. The existing farmland protection space policy can be integrated by establishing a national farmland strategic reserve system (based on resilient space), and further development of targeted use control measures for zoning, grading, and classification will help realize sustainable China's farmland resources use.

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“…In 2015, the national high-quality cultivated land area was 3.9738 million ha, accounting for only 2.9% of the total national cultivated land area. The quality of cultivated land in some areas has continued to deteriorate [27]. In particular, the performance of cultivated land in terms of quality and ecological protection is relatively low [21,28,29] because rapid urban expansion has led to cultivated land degradation [30,31], cultivated land conversion [32,33], cultivated land abandonment, and the decline of cultivated land fertility [34].…”

Section: Introductionmentioning

confidence: 99%

What Is the Operation Logic of Cultivated Land Protection Policies in China? A Grounded Theory Analysis

Niu

Lyu

2022

Sustainability

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Cultivated land protection policies (CLPP) are essential for maintaining social stability, guaranteeing food security, and ensuring sustainable development. However, a mismatch exists between policy performance and the objectives that influence the implementation of CLPP, and the system mechanisms of CLPP must be revealed and explored. Based on the literature review, this paper summarizes the current dilemmas of China’s cultivated land protection at the theoretical level, and preliminarily depicts the external foundation of CLPP in view of China’s topography and spatial distribution of cultivated land. This paper uses CLPP texts as research samples based on grounded theory to construct an analytical framework. The results show that the operation logic of the CLPP is founded on situation–structure–motivation–action–space–outcome. Accordingly, systematic analysis and in-depth understanding of the operation logic of CLPP will help to re-examine the profound relationship between policy text and implementation effect from such perspectives as transnational, trans-regional, and multi-scale. It also helps to reveal the hidden scientific value of spatiotemporal pattern for cultivated land protection, and serve the formulation and implementation of relevant policies in the future. Under the background of the new era of ecological civilization, it is urgent to enhance the operational effectiveness of the CLPP, identifying the focus of policy implementation, and scientifically formulating the CLPP is of great significance to its success.

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Research on the Strategy for Improving Cultivated Land Quality in China

Cited by 6 publications

References 0 publications

A Declining Trend in China’s Future Cropland-N₂O Emissions Due to Reduced Cropland Area

A Declining Trend in China’s Future Cropland-N₂O Emissions Due to Reduced Cropland Area

China’s food security situation and key questions in the new era: A perspective of farmland protection

What Is the Operation Logic of Cultivated Land Protection Policies in China? A Grounded Theory Analysis

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Research on the Strategy for Improving Cultivated Land Quality in China

Cited by 6 publications

References 0 publications

A Declining Trend in China’s Future Cropland-N2O Emissions Due to Reduced Cropland Area

A Declining Trend in China’s Future Cropland-N2O Emissions Due to Reduced Cropland Area

China’s food security situation and key questions in the new era: A perspective of farmland protection

What Is the Operation Logic of Cultivated Land Protection Policies in China? A Grounded Theory Analysis

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A Declining Trend in China’s Future Cropland-N₂O Emissions Due to Reduced Cropland Area

A Declining Trend in China’s Future Cropland-N₂O Emissions Due to Reduced Cropland Area