南昌市非农建设占用耕地耕作层土壤剥离潜力与再利用方向

Potential evaluation and reuse scheme of plow layer soil-stripping of cultivated land occupied by non-agricultural construction in Nanchang city

采用GIS空间分析和抽样调查相结合的方法,对南昌市域范围内可剥离耕作层土壤的数量和规模进行了测算与分析。结果表明,南昌市理论上可剥离的耕层土壤总面积为8947.12 hm^(2),可剥离土方量为2387.42×10^(4) m^(3);南昌市非农建设拟占用耕作层实际可剥离耕地面积为7036.94 hm^(2),可剥离土壤土方量为1958.95×10^(4) m^(3);南昌市拟补充耕地资源总面积为15091.01 hm^(2),覆土需求总量为4527.31×10^(4) m^(3),其中拟实施旱地改水田项目新增耕地覆土需求量占全市新增耕地覆土需求量的53.1%;以耕地提质改造为目标的旱地改水田项目表土回覆利用、以耕地后备资源开发复垦为目标的土地整治项目表土回覆利用及城市绿地再造的表土回覆利用是南昌市耕地耕作层土壤剥离再利用的主要方向。南昌市建设占用耕地耕作层土壤可剥离土壤资源较为丰富,可满足拟补充耕地资源地块40%以上的覆土需求。

Using the method of GIS spatial analysis and sampling survey,the quantity and scale of stripped arable soil in Nanchang city were calculated and analyzed.The results showed that in theory,the total area of stripable topsoil soil in Nanchang was 8947.12 hm^(2),and the amount of stripable earthwork was 2387.42×10^(4) m^(3);The actual stripable cultivated land area of the cultivated layer to be occupied by non-agricultural construction in Nanchang was 7036.94 hm^(2),and the stripable soil earthwork was 1958.95×10^(4) m^(3);The total area of cultivated land resources to be supplemented in Nanchang was 15091.01 hm^(2),and the total demand for covering soil was 4527.31×10^(4) m^(3).The demand for covering soil of the newly-increased cultivated land from dryland to paddy consolidation was in big percentage(53.1%)of the total demand for covering soil of the newly-increased cultivated land in Nanchang.Dry land to paddy con⁃solidation for the quality imprvoment of cultivated land,land consolidation for the development of cultivated land-reserve resources,and urban green space reconstruction were the main directions of reuse scheme of plow layer soil-stripping of cultivated land occupied by non-agricultural construction in Nanchang.Cultivated land occupied by non-agricultural construction abounds with strippable top⁃soil soil resource,which could meet the needs of more than 40%of the newly-increased cultivated land in Nanchang city.