基于农用地分等成果的武功县耕地生产能力分析

Analysis of production capacity of cultivated land in Wugong County,Shaanxi Province based on agricultural land classification

为了充分利用农用地分等成果测算耕地生产能力,合理开发农用地生产潜力,建立了农用地产能核算技术方案体系,并据此以武功县为例,计算了该县农用地自然生产潜力、利用生产潜力和现实生产能力。通过各分等单元的自然质量等级指数和利用等级指数分别乘以单元面积并累加得到自然生产潜力和利用生产潜力,并利用Logistic模型拟合标准粮产量和利用等指数之间的关系来计算现实生产能力。结果表明,武功县自然生产潜力和利用生产潜力分别为107.42×104t和70.05×104t,单位面积自然生产潜力和利用生产潜力分别为39.22 t.hm-2和25.58 t.hm-2,现实生产能力为28.49×104t,单位面积现实生产能力为10.40 t.hm-2。武功县耕地生产能力在空间上差异明显,粮食单产有从东南向西北递减的趋势,单位面积现实产能最高和最低的分别为普集镇和游风镇,为13.53 t.hm-2和8.66 t.hm-2,未来西北台塬区的乡镇是粮食增产的重点区域。

In order to calculate farmland production capacity,rationally exploit farmland productive potential and fully utilize the results of agricultural land classification,the farmland grain potential production system was established.Based on this,natural productive potential,utilization productive potential and actual production capacity in Wugong County were calculated.The corresponding production potential was unit area times its corresponding quality index,and then summed up.The logistic model fitting the relationship between standard grain production and utilization quality index was used to calculate actual production capacity.The results showed that natural productive potential and utilization productive potential of Wugong County were 107.42×104t and 70.05×104t,respectively.The natural productive potential per unit area was 39.22 t·hm-2 and utilization productive potential per unit area was 25.58 t·hm-2.The actual production capacity was 28.49×104 t and actual production capacity per unit area was 10.40 t·hm-2.In spatial,cultivated land productivity per unit area in Wugong County showed significant gradient decrease distribution from southeast to northwest.Actual production capacity per unit area of Puji Town was the highest,13.53 t·hm-2,and Youfeng Town had the lowest one,which was 8.66 t·hm-2.