农用地分等中作物生产潜力空间插值方法研究

Spatial interpolation method of crop productive potentiality for the classification of agricultural land

采用空间插值模型进行插值,形成精度高、在空间上连续分布、符合自然分布规律的作物光温或气候生产潜力,从而提高农用地分等的科学性、准确性和实用性。该文对常用的空间插值模型进行了比较分析,并采用河南省农用地分等数据进行验证,指出克立格法初始插值结果优于其它模型的初始插值结果;同时,指出由于模型的缺陷,在山区或数据稀少地区需要对初始插值进行进一步校正,以使内插结果更加接近实际,并提出了对作物光温(气候)生产潜力初始插值结果进行修正的方法。

The high accuracy, continual distribution and natural rules of light-temperature crop productive potentility and climate crop productive potentiality are analyzed based on the spatial interpolation method, which improve the sciefication, accuracy and practicality of agricultural land classification. Compared the common spatial interpolation models and based on the classification data of agricultural land in Henan Province, the initial interpolation results of Kriging are better than those of other models. The initial interpolation value should be modified in mountainous area and the area of absent data because of the limitation of model. The method of modifying the initial interpolation value of light-temperature and climate crop productive potentiality were put forward.