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Definition of Management Zones for Enhancing Cultivated Land Conservation Using Combined Spatial Data

机译：结合空间数据确定加强耕地保护的管理区

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摘要

The loss of cultivated land has increasingly become an issue of regional and national concern in China. Definition of management zones is an important measure to protect limited cultivated land resource. In this study, combined spatial data were applied to define management zones in Fuyang city, China. The yield of cultivated land was first calculated and evaluated and the spatial distribution pattern mapped; the limiting factors affecting the yield were then explored; and their maps of the spatial variability were presented using geostatistics analysis. Data were jointly analyzed for management zone definition using a combination of principal component analysis with a fuzzy clustering method, two cluster validity functions were used to determine the optimal number of cluster. Finally oneway variance analysis was performed on 3,620 soil sampling points to assess how well the defined management zones reflected the soil properties and productivity level. It was shown that there existed great potential for increasing grain production, and the amount of cultivated land played a key role in maintaining security in grain production. Organic matter, total nitrogen, available phosphorus, elevation, thickness of the plow layer, and probability of irrigation guarantee were the main limiting factors affecting the yield. The optimal number of management zones was three, and there existed significantly statistical differences between the crop yield and field parameters in each defined management zone. Management zone I presented the highest potential crop yield, fertility level, and best agricultural production condition, whereas management zone HI lowest. The study showed that the procedures used may be effective in automatically defining management zones; by the development of different management zones, different strategies of cultivated land management and practice in each zone could be determined, which is of great importance to enhance cultivated land conservation, stabilize agricultural production, promote sustainable use of cultivated land and guarantee food security.
机译：耕地流失日益成为中国地区和国家关注的问题。划定管理区是保护有限的耕地资源的重要措施。在这项研究中，结合空间数据被用来定义中国阜阳市的管理区。首先计算和评估耕地的产量，并绘制空间分布图；然后探讨了影响产量的限制因素；并使用地统计分析方法绘制了它们的空间变异图。结合主成分分析和模糊聚类方法对数据进行管理区域定义的联合分析，使用两个聚类有效性函数确定最佳聚类数。最后，在3,620个土壤采样点上进行了单向方差分析，以评估定义的管理区域对土壤特性和生产力水平的反映程度。结果表明，存在增加谷物产量的巨大潜力，耕地数量在维持谷物生产安全方面起着关键作用。影响产量的主要限制因素是有机质，总氮，有效磷，海拔高度，耕层厚度以及灌溉保证的可能性。最佳管理区数为三个，在每个定义的管理区中，作物产量与田间参数之间存在显着的统计差异。管理区I的潜在作物产量最高，肥力水平最高，农业生产条件最佳，而管理区HI的最低。研究表明，所使用的程序可能会有效地自动定义管理区域。通过发展不同的管理区，可以确定每个区不同的耕地管理策略和实践，对加强耕地保护，稳定农业生产，促进耕地可持续利用和保障粮食安全具有重要意义。

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  • 来源
    《Environmental Management》 |2013年第4期|792-806|共15页
  • 作者

    Yan Li; Zhou Shi; Hao-Xiang Wu; Feng Li; Hong-Yi Li;

  • 作者单位

    Institute of Land Science and Property Management, School of Public Affairs, Zhejiang University, Hangzhou 310058, China;

    Institute of Agricultural Remote Sensing and Information Technology Application, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China;

    Institute of Land Science and Property Management, School of Public Affairs, Zhejiang University, Hangzhou 310058, China;

    College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China;

    School of Tourism and Urban Management, Jiangxi University of Finance and Economics, Nanchang 330013, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Management zone; Productivity; Field parameters; Spatial distribution pattern; Cultivated land conservation;

    机译：管理区;生产率;现场参数;空间分布格局;耕地保护;

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