Construction of the evaluation system for Se-rich arable land and its application in Xinxu Town, Xintian County, Hunan Province

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.