Construction of the evaluation system for Se-rich arable land and its application in Xinxu Town, Xintian County, Hunan Province
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摘要:
研究目的 天然富硒农产品是人体摄入硒元素最安全有效的途径，依托天然富硒土地资源建立的富硒农业和富硒特色小镇等富硒产业，成为脱贫攻坚和乡村振兴的新兴产业支柱，其规划和建设需以富硒土地质量等级为基础，但国内缺乏富硒土地资源评价体系。
研究方法 本文以新田县为例，从耕地的开发利用条件和潜力、开发利用价值以及开发制约条件着手，构建耕地地力、经济质量和生态环境“三位一体”的富硒耕地质量评价体系；基于新田县新圩镇富硒土壤详查数据和全国土地调查成果开展富硒耕地质量评价研究，对耕地的自然属性、环境属性、经济属性等进行综合评价。
研究结果 其评价结果与农产品质量和富硒程度耦合良好，真实反映了耕地资源开发条件与潜力。
结论 构建的富硒耕地质量评价体系对富硒耕地资源开发利用有较科学指导价值，为富硒土地资源和富硒产业规划提供了重要参考和借鉴。
Abstract:This paper is the result of agricultural geological survey engineering.
Objective Natural selenium (Se)-enriched agricultural products is the safest and most effective way for human Se uptake. The Serich agriculture and Se- rich characteristic towns, which should be established based on natural Se- rich land, have become the pillars of emerging industries for poverty alleviation and rural revitalization. Their planning and construction should be based on the quality evaluation of Se-rich land, but there is a lack of the method for this evaluation.
Methods Taking Xintian County as an example, a new system of Se-rich arable land quality evaluation was established, which was composed of the evaluation of land fertility, economic quality, and ecological environment. The evaluation system was based on the development potential, utilization value, and restriction conditions of the arable land. Additionally, this paper carried out a comprehensive evaluation of the natural, environmental, and economic attributes, based on the results of Comprehensive Survey of Se- enriched Soil Geochemistry and National Land Survey in Xinxu Town of Xintian County.
Results The evaluation results are coincident with the quality of agricultural products and Se- rich degree, which reflected the development conditions and the potential of arable land resources.
Conclusions The above- mentioned evaluation system can guide the development and utilization of Se- rich arable land, and can be used for the planning of Se-rich land resources and related industry.
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表 7 立地条件和土壤物理化学性质因子相关系数矩阵
Table 7. Correlation coefficient matrix of factors of site condition and soil physico-chemical property
下载: 导出CSV
表 8 土壤养分及土壤环境各因子相关系数矩阵
Table 8. Correlation coefficient matrix of factors of soil nutrients and soil environment
下载: 导出CSV
表 9 新田县新圩镇富硒耕地质量评价指标及权重
Table 9. Evaluation index and weight of Se-rich arable land quality in Xinxu Town, Xintian County
下载: 导出CSV
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