The invention discloses a
system and a method for constructing a soil available
phosphorus analysis model based on a
satellite image, and aims to solve the problems that time and labor are consumed, the cost is high and accurate and comprehensive fertilization cannot be realized when the soil available
phosphorus content is used for guiding fertilization. According to the invention, a Spearman
sensitive analysis technology and a GA + BP neural network
algorithm are adopted, a soil available
phosphorus inversion model is established by applying
matlab programming and GUI design, pixel-by-pixel fine analysis technologies are carried out by applying multiple parameters such as sensitive wave bands, sensitive
wave band mathematical transformation and
field soil sample acquisition data, quantitative analysis is carried out on available phosphorus of soil fertilization, and thus obtaining soil available phosphorus
content distribution raster data of the target area before
sowing; compared with a traditional method, the
remote sensing technology is used for
processing satellite image data, the
Matlab technology is used for completing model construction, the GIS technology is combined for completing correlation and grid vectorization of
reflectivity information and soil sample data and guiding fertilization prescription
map making, the production cost can be saved, the production efficiency is improved, and the purpose of farmland protection is achieved.