海拔因子对农用地自然质量等指数影响研究

 针对《农用地分等规程》中未将海拔因子作为分等因素的情况，以云南省香格里拉县为例，利用标准粮产量来分析海拔因子对农用地自然质量等指数的影响，并将海拔因子作为一个修正系数纳入自然质量等指数的计算中；研究结果表明，将海拔因子作为一个修正系数纳入自然质量等指数的计算中后，所得的成果更加符合该县的实际情况。建议在农用地分等中，对于海拔差异较大、立体气候突出且耕地在各个海拔都有分布的地区，可用此方法来修正海拔对农用地自然质量等指数的影响。

Research for the Influence of Altitude Factor on Natural Quality of Agricultural Land

Since“Regulations for classification on agricultural land”had not taken altitude factor into account as grading factors, Shangri La County in Yunnan province were taken as the example, using standard grain yield to analyze the influence of altitude factor on natural quality of agricultural land, and altitude factor was taken as a coefficient into the computation of parameters as natural quality .The results showed that the outcomes accorded with actual situation very well when altitude factor taken as a coefficient into the computation of parameters as natural quality. It is suggested that this method can be used at those areas where altitude discrepancy is big, three dimensional climate is obvious and farmlands distribute at various altitudes to modify the influence of altitude on parameters as natural quality of agricultural land in the grading of agricultural land.