Method and system for determining spatial scales of field investigation and field management

Abstract

The invention provides a method and system for determining spatial scales of field investigation and field management. The method includes the steps of (1) obtaining remote sensing images containing a to-be-processed land parcel, and carrying out preprocessing, (2) obtaining vegetation parameters from the remote sensing images, (3) respectively constructing semi-variance variation functions of all pixel pairs with fixed step lengths in the to-be-processed land parcel in the direction along ridges and the direction perpendicular to the ridges according to the vegetation parameters, (4) calculating the minimum fixed step length in the direction along the ridges when a first-order derivative value of the semi-variance variation function in the direction along the ridges is smaller than a first preset threshold value, and calculating the minimum fixed step length in the direction perpendicular to the ridges when the first-order derivative value of the semi-variance variation function in the direction perpendicular to the ridges is smaller than a second preset threshold value, and (5) determining the spatial scales of field investigation and field management according to the optimal step length in the direction along the ridges and the optimal step length in the direction perpendicular to the ridges. By means of the method and system, the proper spatial scales of field investigation and field management can be rapidly and accurately determined.

Description

Technical field [0001] The present invention relates to the field of agricultural technology, in particular to a method and system for determining the spatial scale of field surveys and field management. Background technique [0002] For a long time, my country's agricultural production has been based on fields, and basically the same amount of seeds, fertilizers, herbicides, growth agents, etc. have been used on all farmland in the same area. In addition to waste due to blind usage and often oversupply, it also leads to soil and groundwater pollution. Field sampling shows that even in areas with the same soil texture, soil properties (physical, chemical, biological properties, etc.) are significantly different in different spatial locations, and crop growth information is not only related to soil properties, but also related to farmland ground hydrology. Conditions and agricultural farming levels are closely related, and also have complex spatial variability. Precision agricul...

AI Technical Summary

Problems solved by technology

Secondly, in the process of variable implementation of precision agriculture, the size of the fertilization management unit directly affects the effect of fertilization and economic benefits. If the management unit is too large, it will affect the effect of precision management, and if the management unit is too small, it will affect the implementation efficiency.

There is no method in the prior art to determine the spatial scales of different farmland surveys and field management within a regional scale

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