Method for modeling rice and wheat leaf nitrogen content spectrum monitoring model

A technology of model modeling and spectral monitoring, applied in measurement devices, material analysis by optical means, instruments, etc., can solve problems such as poor timeliness, poor sensitivity, and large differences in spectral reflectance, to enhance the mechanism, improve Good sensitivity and universality
CN102175618AInactive Publication Date: 2011-09-07NANJING AGRICULTURAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
NANJING AGRICULTURAL UNIVERSITY
Publication Date
2011-09-07
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a method for modeling a rice and wheat leaf nitrogen content spectrum monitoring model and belongs to the field of nondestructive monitoring of crop growth information in precision agriculture. The method comprises the following steps of: fusing rice and wheat canopy leaf reflectance spectrum data which is acquired by a field high-spectrum radiometer with rice and wheat canopy leaf nitrogen content data; and establishing a canopy leaf nitrogen content spectrum monitoring model orienting different growth periods of rice and wheat based on narrow band and wide band combination. The optimal vegetation index orienting a rice and wheat jointing and booting stage and a heading and grain filling period is established by utilizing multi-point rice and wheat field test data in many years; and rice and wheat canopy leaf nitrogen content common characteristic wave band and bandwidth are developed. The model covers different species and different nitrogen levels of rice and wheat, utilizes a data validation model in an independent year, and is high in universality and high in accuracy.
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Description

technical field

[0001] The invention discloses a modeling method for a spectral monitoring model of nitrogen content in rice and wheat leaves, relates to a spectral monitoring model of rice and wheat growth information, and belongs to the field of non-destructive monitoring of crop growth information in precision agriculture. Background technique

[0002] Rice and wheat are the most important food crops in my country. Real-time monitoring of rice and wheat nitrogen nutrition status can not only ensure the yield and quality of rice and wheat, but also improve the efficiency of nitrogen fertilizer use and reduce groundwater pollution, thereby generating huge economic and ecological benefits. For a long time, the nitrogen content monitoring of rice and wheat has been obtained through destructive sampling in the field and indoor analysis and measurement. The disadvantages are: time-consuming and laborious, poor timeliness, and cannot guide the precise management of rice and wheat...

Claims

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