依据《农用地分等定级规程》、《农用地产能核算规程》等建立农用地产能核算方法体系，对永昌县农用地产能和利用潜力进行了研究。结果表明，永昌县农用地的实际产能、可实现产能、理论产能分别为47.113 323万t、59.553 829万t、65.317 829万t，可实现强度占理论强度的91.60%，利用潜力较大；可实现潜力、理论潜力分别占实际单产的21.19%和12.59%。

The productivity and productive potential of farmland were studied based on gradation procedures and productivity accounting rules of farmland in Yongchang county . The results showed that the theoretical productivity was 65.31×104 t， accessible productivity was 47.11×104 t and actual productivity was 59.55×104 t . The accessible use intensity accounted for 91.60% of theoretical use intensity . The breeding potential was lager . The theoretical breeding potential and accessible breeding potential was 21.19% and 12.59% of per unit area of actual productivity

S159

甘肃省教育厅资助项目(0902-09)