陕西省礼泉县耕地产能核算  

Cultivated land productivity in Liquan County,Shaanxi Province of Northwest China

作　　者：赵永华[1] 贾夏[2] 卫新东[1] 李勇[1] 

机构地区：[1]长安大学地球科学与资源学院,西部矿产资源与地质工程教育部重点实验室,西安710054 [2]长安大学环境科学与工程学院,西安710054

出　　处：《生态学杂志》2011年第10期2323-2328,共6页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(31000222);陕西省农用地产能核算项目资助

摘　　要：基于农用地分等成果,在建立关中渭河平原区理论和可实现单产模型的基础上,以乡镇为研究单元,计算了礼泉县理论产能、可实现产能和实际产能。结果表明,2008年礼泉县理论产能为39.60万t,可实现产能为29.82万t,实际产能为18.69万t;理论单产为19071kg·hm-2,可实现单产为14745kg·hm-2,实际单产为9042kg·hm-2;理论利用强度为0.764,可实现利用强度为0.639;理论利用潜力为4376kg·hm-2,可实现利用潜力5115kg·hm-2。礼泉县三大产能在空间上差异明显,理论单产、可实现单产和实际单产在空间上从南向北呈现差异明显阶梯状分布,南部乡镇单产最大、中部乡镇单产居中、北部乡镇单产最小。造成单产差异明显的原因是区域的地形地貌、土壤类型、投入水平、技术等,未来南部和中部的各乡镇是该县粮食增产的重点区域。Based on the classification of agricultural land productivity,the models of theoretical and accessible productivities per unit area of the cultivated lands in Weihe plain of Guanzhong were established,and the theoretical,accessible,and actual productivities of the cultivated lands in Liquan County were calculated,with township as a unit.In the County,the theoretical productivity of cultivated lands was calculated as 39.60×104 t,accessible productivity was 29.82×104 t,and actual productivity 18.69×104 t.The theoretical,accessible,and actual productivities per unit area were 19071,14745,and 9042 kg·hm-2,the theoretical and accessible land use intensities were 0.764 and 0.639,and the theoretical and accessible production potentials were 4376 and 5115 kg·hm-2,respectively.Spatially,there existed obvious differences in the theoretical,accessible,and actual productivities per unit area,being the highest in southern part,followed by in middle part,and the lowest in northern part.Terrain feature,soil type,input level,and technology were the main factors affecting the cultivated land productivity in Liquan County,and the southern and the middle parts of the County would be the key regions for the grain yield increasing in the future.

关 键 词：产能核算 理论产能 可实现产能 实际产能 

分 类 号：F301.21[经济管理—产业经济]