清镇县主要耕作土种的农业自然生产潜力及其限制因子分析

Analysis on the AgriculturaI NaturaI PotentiaI Productivity of Main Cultlwated Soil Species And Tbeir Llmiting Factors in Qingzhen County

本文从探讨土地生产潜力的角度入手，根据研究区的自然条件、生产特征及大量的实侧资料，初步建立起了光、温、水和土壤肥力等要素对农业生产潜力的影响模型。通过模型计算出了清镇县主要耕作土的农业自然生产潜力，并确定了影响其自然生产潜力发挥的首要限制因于是土壤肥力，其次是温度条件，再次是水分条件。这为清镇县分阶段地进行土壤改良、迅速提高粮食单产水平提供依据。

Based on the natural conditions,productive features and lots of field data in the research area,themodel of agricuItural natural potential productivity affected by some conditions such as light,temperature,pre-cipitation and soil fertility was established prel iminaryly。The agricultural potential productivity of maincultivated soil genera were calculated through analysis of the models,and also it had been found that the domi-nant factors limiting agricultural potential productivity in Qingzhen is the soil fertility conditions, the secondlimiting factor is temperature,and the third is precipitation。It would be scientific basis for soil provement bystages in Qingzhen。