Rice nitrogen nutrition monitoring method based on unmanned aerial vehicle loaded active canopy sensor

Abstract

The invention discloses a rice nitrogen nutrition monitoring method based on an unmanned aerial vehicle loaded active canopy sensor. The rice nitrogen nutrition monitoring method based on the unmannedaerial vehicle loaded active canopy sensor comprises the following steps: constructing a crop monitoring platform of an unmanned aerial vehicle loaded active non-imaging canopy spectrum sensor; usingan unmanned aerial vehicle ground station system, controlling an unmanned aerial vehicle monitoring system, and automatically acquiring rice canopy spectrum data and the position information of a corresponding test point under a testing distance which is higher than a canopy by 1.5 m and at a flight speed of 2 m / s; extracting spectrum data of various parcels of rice field by using geographic information system software; calculating vegetation indexes RERVI; estimating rice leaf dry weight, leaf area index and leaf nitrogen accumulated amount on the basis of a monitoring model of RERVI, and evaluating rice nitrogen nutrition conditions. By the method, crop nitrogen nondestructive monitoring ability is improved, and thus, the method is used for large-scale comprehensive crop nitrogen fertilizer decision and implementation of accurate agriculture, and the agricultural modern level is improved.

Description

technical field [0001] The invention belongs to the technical field of crop nitrogen nutrition monitoring, and relates to a rice nitrogen nutrition monitoring method based on an active canopy sensor carried by an unmanned aerial vehicle. Background technique [0002] Nitrogen is a major element that plays an important role in crop growth and development, and the large-scale application of nitrogen fertilizer has made an important contribution to my country's grain production [1] . However, in actual production, due to the lack of real-time, non-destructive, and quantitative monitoring technology for crop nitrogen nutrition, farmers often apply more nitrogen fertilizers in order to achieve the highest yield, and the amount of nitrogen applied by farmers often exceeds the requirements for crop production. This not only leads to the reduction of nitrogen fertilizer use efficiency, but also brings problems such as soil acidification, nitrogen deposition, water eutrophication an...

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Problems solved by technology

However, there are few reports on the use of drones equipped with non-imaging canopy sensors for crop monitoring

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