Winter wheat moisture monitoring method and system based on PROSPECT model

Abstract

The invention discloses a winter wheat moisture monitoring method and system based on a PROSPECT model, and relates to the field of plant moisture monitoring. The method comprises the steps of 1, determining the moisture content of winter wheat plants in each growth period; 2, establishing a PROSPECT model of the winter wheat; 3, analyzing spectral characteristics of the winter wheat, and screening a moisture spectral sensitive waveband; and 4, constructing a multiple regression model of the moisture content of the winter wheat plants through the model reflectivity of the sensitive wavelengthin each growth period. According to the technical scheme, the PROSPECT radiation transmission model is established on the basis of measured values such as chlorophyll content, equivalent water thickness and dry matter content and other input data, the model reflectance is obtained, the sensitive wavebands of all growth periods are screened out through correlation analysis of the plant moisture content and the model reflectivity; the multiple regression model of the moisture content of the winter wheat plants is constructed through the model reflectivity of the sensitive wavelength in each growth period, and the effect and precision of a PROSPECT radiation transmission model in the aspect of moisture wheat moisture monitoring are explored.

Description

technical field [0001] The disclosure of the invention relates to the field of plant moisture monitoring, in particular to a method and system for monitoring moisture of winter wheat based on the PROSPECT model. Background technique [0002] Wheat is an important commodity grain and a strategic main grain reserve variety in China. The total area of ​​the North China Plain is about 400,000 km2; it accounts for 23% of the country's arable land and produces nearly 40% of the grain. Winter wheat is the grain crop with the largest planting area in the North China Plain, and its output accounts for more than 50% of the country's total. The research on water consumption of winter wheat has always been the focus and focus of agricultural water saving research in North China. Precision agriculture is a new direction of agricultural modernization. It mainly realizes the modern management of farmland by realizing real-time acquisition of farmland information such as farmland moisture...

AI Technical Summary

Problems solved by technology

[0005] The above are the relevant researches on crop water monitoring and PROSPECT model by researchers in recent years, but there are relatively few researches on water inversion based on PROSPECT model for winter wheat, and the accuracy needs to be improved, and further examples are still needed Research to obtain better monitoring effect and more accurate inversion degree

Images