基于农用地分等成果的耕地产能核算研究——以陕西省扶风县为例

Study on cultivated land productivity calculation based on agricultural land classification——A case study of Fufeng county,Shaanxi province

以渭河平原区陕西省扶风县为例,依据自然等级和利用等级与抽样样点指定作物之间的关系,建立了耕地产能核算模型,核算了扶风县耕地产能.结果表明:2009年扶风县理论产能为70.45万t,可实现产能为50.06万t,实际产能为32.65万t;理论产能单产为17 836.05 kg/hm2,可实现产能单产为12 243.72 kg/hm2,实际产能单产为7 592.59 kg/hm2;理论利用强度为0.685;可实现利用强度为0.622;理论潜力为5 593.5 kg/hm2,可实现潜力4 653.265 kg/hm2.在空间上,理论单产、可实现单产和实际单产从南向北呈现明显阶梯状分布,南部平原区乡镇单产最大,中部高原区各乡镇单产居中,北部山区乡镇单产最小.未来,南部平原区和中部高原区乡镇是粮食增产的重点区域.影响扶风县耕地产能的主要因素包括干旱、水价及其粮食作物的品种等.

According to the relationship between sampling sites and productivity（including theoretical productivity,accessible productivity and actual productivity） with the natural quality of agricultural land index and land use index,the cultivated land productivity models were established and the cultivated land productivity of the study area was calculated.The results showed that the theoretical productivity is 70.45×104 t,accessible productivity is 50.06×104 t and actual productivity is 32.65×104 t.Per unit area of theoretical productivity is 17 836.05 kg/hm2,per unit area of accessible productivity is 12 243.72 kg/hm2 and per unit area of actual productivity is 7 592.59 kg/hm2.The theoretical use intensity is 0.685 and accessible use intensity is 0.622.The theoretical breeding potential is 5 593.5 kg/hm2 and accessible breeding potential is 4 653.265 kg/hm2.In spatial,per unit area of theoretical,accessible and actual productivity showed significant ladder-like distribution from south to north;Per unit area of productivity is highest in the south plain region and lowest in the north hilly region.The south plain region and the middle mountain region are key regions of grain yield increment in future.The fundamental factors influencing the cultivated land productivity of Fufeng county include drought,water value,grain-breeds and so on.