A rice plant total-nitrogen estimation method based on a canopy structure and a canopy spectrum
A canopy structure and rice technology, which is applied in the field of rice plant total nitrogen rapid measurement, can solve the problems of destructiveness and poor timeliness, and achieve the effect of good prediction ability and stable model
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specific Embodiment approach 1
[0017] Specific implementation mode one: the method for estimating the total nitrogen of rice plants based on canopy structure and canopy spectrum in this embodiment is carried out according to the following steps:
[0018] Step 1: After rice transplanting, tillering stage, and jointing and booting stage, measure the canopy spectrum of rice with different nitrogen fertilizer levels, collect 6 spectral curves for each different nitrogen fertilizer level, and perform arithmetic average on the 6 spectral curves to obtain different nitrogen fertilizer levels. Actual reflectance spectrum data of rice under nitrogen level;
[0019] Step 2: Collecting rice plant samples at corresponding periods after rice transplanting, tillering stage, and jointing and booting stage, measuring the plant height of the rice samples and determining the number of stems of each sample, and then measuring the total nitrogen content of the rice plants;
[0020] Step 3: Use the 9-point weighted moving avera...
specific Embodiment approach 2
[0033] Specific implementation mode two: the method for estimating the total nitrogen of rice plants based on canopy structure and canopy spectrum in this embodiment is carried out according to the following steps:
[0034] Step 1: Spectral measurement of rice canopy
[0035] After transplanting, tillering stage and jointing and booting stage of two varieties of rice (rice types Songjing 9 and Daohuaxiang), the canopy spectra of rice with different nitrogen levels were measured, and 6 spectral curves were collected for each nitrogen level. Arithmetic average of 6 spectral curves and 6 spectral curves were used to obtain the actual reflectance spectral data of rice under different levels of nitrogen application, and a total of 36 sets of data were obtained;
[0036] Step 2: Collection of rice canopy structure parameters and determination of nitrogen content
[0037] Collect rice plant samples at corresponding periods after rice transplanting, tillering stage, and jointing and ...
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Abstract
Description
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Application Information
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