文章摘要
1990—2018年四川盆地耕地利用稳定性时空分异及驱动机制分析
Analysis of the spatio-temporal differentiation and driving mechanisms of cropland utilization stability in Sichuan Basin from 1990 to 2018
投稿时间:2024-07-16  
DOI:10.13254/j.jare.2024.0528
中文关键词: 耕地利用稳定性,农业区,驱动机制,时空格局,四川盆地
英文关键词: cropland utilization stability, agricultural zone, driving mechanism, spatio-temporal pattern, Sichuan Basin
基金项目:四川省自然科学基金项目(2025ZNSFSC0298);自然资源部耕地资源调查监测与保护利用重点实验室开放基金(CLRKL2024KP03)
作者单位E-mail
钟雨辰 四川农业大学资源学院, 成都 611130  
黄一秦 四川农业大学资源学院, 成都 611130  
王启 四川农业大学资源学院, 成都 611130
自然资源部耕地资源调查监测与保护利用重点实验室, 成都 610045 
 
孙俊 四川农业大学资源学院, 成都 611130  
欧定华 四川农业大学资源学院, 成都 611130
自然资源部耕地资源调查监测与保护利用重点实验室, 成都 610045 
 
余吴浩淼 四川农业大学资源学院, 成都 611130  
高雪松 四川农业大学资源学院, 成都 611130
自然资源部耕地资源调查监测与保护利用重点实验室, 成都 610045 
xuesonggao@sicau.edu.cn 
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中文摘要:
      稳定利用耕地对于保持耕地的稳定生产、保障区域粮食安全具有重大意义。然而,当前鲜见针对粮食主产区的耕地利用稳定性研究。本研究利用高精度土地利用数据集评价了1990—2018年四川盆地耕地的利用稳定性时空分异特征;并基于人工神经网络模型,结合自然和人类活动因子,分析了四川盆地耕地利用稳定性的驱动机制。结果表明,四川盆地1990—2018年不稳定耕地面积为6.67×104 km2,占总耕地面积的33.9%。不稳定耕地主要分布于川中丘陵区、山岭地带、城市边缘以及盆周山区。1990—2018年,四川盆地不稳定耕地总面积经历了两轮先降后升的波动变化,总体增长率为8.5%。其中,建设用地邻近度对耕地利用稳定性的影响最为显著(相对重要性达到了0.28),其次是水体邻近度和气候生产潜力(相对重要性分别为0.25和0.17)。这一现象可能由近30年四川盆地城市化进程加快激化的人地矛盾,以及农村人口迁移导致的青壮年劳动力流失所导致。地方政府应有效阻止城市房地产开发商做出“占优补劣”“占平补坡”等不当行为,并在农村通过开展土地整治工程等措施盘活耕地资源,同时结合气候敏感区资源禀赋合理规划耕地利用布局并制定耕作制度。
英文摘要:
      Stable utilization of cropland is crucial for maintaining stable agricultural production and ensuring national food security. However, studies on the utilization stability of cropland at the agricultural zone are still relatively few. This study assessed the utilization stability of cropland in Sichuan Basin from 1990 to 2018 using a fine-resolution land use dataset, and then analyzed the driving mechanisms behind the cropland utilization stability of Sichuan Basin with combination of natural and anthropogenic factors. The average area of unstable cropland in Sichuan Basin from 1990 to 2018 was 6.67×104 km2, amounted to 33.9% of the total. Unstable cropland was predominantly concentrated in the urban fringes, hilly regions within the basin and mountainous areas surrounding the basin. The quantity of unstable cropland in Sichuan Basin exhibited a two-wave pattern, initially declining after an increase, with a final growth rate of 8.5%. Distance to built-up land exerts the most significant influence on the utilization stability of cropland(with a relative importance of 0.28), followed by distance to water body(0.25), and climate potential productivity(0.17). This phenomenon may be attributed to the humanland relationship conflict exacerbated by rapid urbanization over the past 30 years, along with the depletion of young and middle-aged laborers. Local governments should prevent urban developers from appropriating fertile or flat cropland to compensate for less fertile or hilly areas, activate the rural cropland resources by carrying out land improvement projects, and ensure proper planning of cropland layout and cropping systems in climate-sensitive regions.
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