Method for detecting phosphorus content of jujube tree canopies

Abstract

The invention discloses a method for detecting the phosphorus content of jujube tree canopies. The method comprises the following steps: acquiring high spectral information of the jujube tree canopies in sunny, cloudless or slightly cloudy and below 3 level wind power weather; carrying out multiplicative scatter correction on the high spectral data and carrying out wavelet noise reduction and smoothing treatment; extracting the spectral reflectivity of the jujube tree canopies with the phosphorus content to be determined in every one of the following wavelengths: 404 nm, 407 nm, 411 nm, 419 nm, 430 nm, 553 nm, 670 nm, 708 nm, 939 nm, 1124 nm, 1398 nm and 1399 nm; and substituting every spectral reflectivity to a detection model, and calculating to obtain the phosphorus content of the jujube tree canopies. The method has the characteristics of no pollution, simplicity in operation, fastness and high accuracy, and is suitable for being promoted and applied.

Description

technical field [0001] The invention belongs to the technical field of plant cultivation engineering and relates to a method for detecting phosphorus content, in particular to a method for detecting phosphorus content in jujube canopy. Background technique [0002] Phosphorus is an essential nutrient element for the growth of jujube trees. Rapid acquisition of phosphorus information is a prerequisite for monitoring the growth and quality of jujube trees. The detection method of total jujube canopy phosphorus content in the prior art requires the preparation of chemical reagents, and the discharge of chemical tail liquid during the measurement process will pollute the environment and harm the human body, and has the defects of cumbersome operation steps and long detection time. At present, there is an urgent need for a non-polluting, easy-to-operate, fast and accurate detection method for phosphorus content in jujube tree canopies. Contents of the invention [0003] In ord...

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Problems solved by technology

[0003] In order to overcome the defects in the prior art, the present invention proposes a non-polluting, easy to operate, fast and accurate detection method for the phosphorus content of the canopy of jujube trees. The preparation of any chemical reagents avoids the environmental pollution and harm to the human body caused by the discharge of chemical tail liquid during the determination process, and at the same time greatly simplifies the operation steps and shortens the detection time, which can meet the short-term requirements of large-scale jujube orchards in agricultural production The need to obtain canopy phosphorus content data provides a means to quickly obtain the basis for fertilizer application for the precise application of phosphorus fertilizer in jujube tree field management

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