Cropland displacement results in changes in cropland site conditions and quality in China during 1990–2020

IF 6.1 1区农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY

Agricultural Systems Pub Date : 2025-04-30 DOI:10.1016/j.agsy.2025.104362

Haoyang Wang , Chaoqing Chai , Wenhao Niu , Yuan Qi , Weiwei Zheng , Xiangbin Kong , Bangbang Zhang

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引用次数: 0

Abstract

Context

Knowledge of cropland displacement patterns and their impacts contributes to cropland conservation, thus ensuring national food security. Despite the growing number of studies focusing on cropland displacement, how cropland displacement affects cropland quality is still not thoroughly explored.

Objective

This study aims to analyze the displacement characteristics of newly added and lost cropland in China from 1990 to 2020 and the impacts of cropland displacement on cropland site conditions and quality, to provide a scientific basis for cropland protection.

Methods

An analysis framework was developed for the impact of cropland displacement on cropland site conditions and quality. The center of gravity model was used to inscribe the spatial displacement trajectory of cropland, while the geographic information system (GIS) was employed for spatial analyses. Based on the land evaluation and site assessment (LESA) system, we quantitatively assessed changes in climate, topography, locational conditions, and landscape patterns of cropland as well as changes in cropland quality.

Results and conclusions

The gravity center of added and lost cropland in China generally shifted toward the southwest during 1990–2020. During this period, the most significant cropland displacement was observed in the Northern arid and semiarid region, the Yunnan-Guizhou Plateau, and the Middle-lower Yangtze River Plain in China. Further analysis revealed that cropland displacement led to changes in topography, climate, and landscape patterns, which were characterized by “occupying low-elevation cropland and compensating high-elevation one”, “occupying gentle-sloped cropland and compensating steep-sloped one”, “occupying superior cropland and compensating inferior one”, and “occupying integrated cropland and compensating fragmented one”. The cropland locational conditions exhibited a trend of “occupying cropland farther from rural roads and compensating one nearer”, and “occupying cropland nearer to rural settlements and compensating one farther”. Additionally, China's LESA (land evaluation and site assessment) scores gradually decreased from 68.91 in 1990 to 66.17 in 2020, indicating an overall decline in cropland quality.

Significance

The findings of this study provide useful insights to reveal the impacts of cropland displacement, and are of great significance for optimizing cropland spatial layout and improving cropland conservation policies in China.

Abstract Image

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1990-2020年中国耕地迁移导致耕地立地条件和质量的变化

了解耕地迁移模式及其影响有助于耕地保护，从而确保国家粮食安全。尽管对耕地迁移的研究越来越多，但对耕地迁移如何影响耕地质量的探讨还不够深入。目的分析1990 - 2020年中国新增耕地和流失耕地的位移特征及其对耕地立地条件和质量的影响，为耕地保护提供科学依据。方法建立耕地置换对耕地立地条件和质量影响的分析框架。利用重心模型刻划耕地空间位移轨迹，利用地理信息系统（GIS）进行空间分析。基于土地评价和立地评价（LESA）系统，定量评价了气候、地形、区位条件、耕地景观格局的变化以及耕地质量的变化。结果与结论1990—2020年中国耕地增减重心总体向西南方向移动。在此期间，中国北部干旱半干旱区、云贵高原和长江中下游平原的耕地位移最为显著。进一步分析发现，耕地迁移导致了地形、气候和景观格局的变化，呈现出“占用低海拔补偿高海拔”、“占用缓坡补偿陡坡”、“占用优势耕地补偿劣势耕地”和“占用综合耕地补偿破碎耕地”的特征。耕地区位条件呈现出“离农村公路远占田补偿近”和“离农村居民点近占田补偿远”的趋势。此外，中国土地评价与选址评价（LESA）得分从1990年的68.91分逐渐下降到2020年的66.17分，表明耕地质量总体下降。研究结果为揭示耕地迁移的影响提供了有益的见解，对优化中国耕地空间布局和完善耕地保护政策具有重要意义。

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来源期刊

Agricultural Systems 农林科学-农业综合

CiteScore

13.30

自引率

7.60%

发文量

174

审稿时长

30 days

期刊介绍： Agricultural Systems is an international journal that deals with interactions - among the components of agricultural systems, among hierarchical levels of agricultural systems, between agricultural and other land use systems, and between agricultural systems and their natural, social and economic environments. The scope includes the development and application of systems analysis methodologies in the following areas: Systems approaches in the sustainable intensification of agriculture; pathways for sustainable intensification; crop-livestock integration; farm-level resource allocation; quantification of benefits and trade-offs at farm to landscape levels; integrative, participatory and dynamic modelling approaches for qualitative and quantitative assessments of agricultural systems and decision making; The interactions between agricultural and non-agricultural landscapes; the multiple services of agricultural systems; food security and the environment; Global change and adaptation science; transformational adaptations as driven by changes in climate, policy, values and attitudes influencing the design of farming systems; Development and application of farming systems design tools and methods for impact, scenario and case study analysis; managing the complexities of dynamic agricultural systems; innovation systems and multi stakeholder arrangements that support or promote change and (or) inform policy decisions.