The invention belongs to a model transfer method, and discloses a soil
nutrient model transfer method of different regions based on multi-
algorithm recommendation. The method comprises the following steps that (1) soil spectroscopic data of the different regions is acquired, and a main sample and an auxiliary sample are set; (2) a
calibration set and a testing set of the main sample are divided, while a calibration model of the main sample is built based on partial
least squares, and the model effect is evaluated; (3) a standard set and an unknown set of the auxiliary sample are divided; (4) the auxiliary sample is subjected to the
spectroscopy pretreatment; (5) through multi-
algorithm model transfer, a prediction result of the unknown set of the auxiliary sample is obtained; (6) through evaluation and analysis, a model transfer
algorithm with the best effect is recommended. According to the method, solving the problem of soil
nutrient content prediction in the different regions by application of a soil
nutrient content model is achieved, the
model prediction effect is guaranteed, while the chemical method measurement time of
soil nutrients is reduced simultaneously, so that the cost is lowered, the manpower and
material resources are saved, and the soil nutrient prediction is achieved in a fast and simple way.