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Hyperspectral measurement method of nitrogen content of wheat plants

A technology of plant nitrogen content and measurement method, which is applied in the field of hyperspectral measurement of wheat plant nitrogen content, can solve the problems of high analysis cost, time-consuming and laborious, and poor timeliness, and achieve good correlation results

Inactive Publication Date: 2019-01-11
INST OF PLANT NUTITUION & RESOURCE ENVIRONMENT HENAN ACADEMY OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to: the above-mentioned traditional method for measuring plant nitrogen content is mostly destructive, the analysis cost is high, time-consuming and laborious, the cycle is long, the timeliness is poor, and the current monitoring methods about nitrogen content mostly use rice and corn as research objects , the problem of little research on different wheat genotype varieties under different test conditions, the present invention provides a hyperspectral method for measuring nitrogen content in wheat plants

Method used

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Embodiment 1

[0040] A hyperspectral determination method for wheat plant nitrogen content, comprising the following steps:

[0041] (1) Test samples: The sampling time is from 2013 to 2014, and the locations are the National Long-term Monitoring and Experimental Stations for Aquivo-aquic Soil Fertility and Fertilizer Benefits - Zhengzhou, Kaifeng, and Shangshui. The wheat varieties are loose (Zhengmai 9694, Zhoumai 18, Kaifa wheat 18) and vertical type (Yumai 50, Yumai 49-198, Yumai 34), the fertilization treatments were no fertilization, nitrogen, phosphorus and potassium fertilizers, organic fertilizers and nitrogen, phosphorus and potassium fertilizers, straw returning to the field and combined application of nitrogen, phosphorus and potassium fertilizers , the planting densities were 900,000 plants / ha, 1.8 million plants / ha, and 3.6 million plants / ha, and the key growth stages of wheat were selected for sampling: rising stage, jointing stage, flowering stage, and mature stage, with a to...

Embodiment 2

[0055] Except that the sampling time in step (1) is 2014-2015, other conditions are the same.

Embodiment 3

[0057] Except that the sampling time in step (1) is 2015-2016, other conditions are the same.

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Abstract

The invention discloses a hyperspectral measurement method of the nitrogen content of wheat plants. The method comprises the following steps: selecting test samples, collecting data, processing the data and screening models, constructing a most suitable monitoring model of the nitrogen content of the wheat plants, optimizing the monitoring model of the nitrogen content of the wheat plants, and testing and inspecting the monitoring model of the nitrogen content of the wheat plants. According to the method, different wheat genotypes are used as materials, hyperspectral remote-sensing technologyis utilized to measure the nitrogen content of the wheat plants under different conditions of planting locations, years, growth development time periods, fertilization levels, planting density and thelike, the hyperspectral remote-sensing technology overcomes the disadvantages of cumbersomeness, troubles and manpower consuming of traditional measurement methods, a large amount of continuous spectral information can be quickly, effectively and non-destructively obtained, and possibility is provided for real-time monitoring of crop growth trends and nutritional status and estimation of crop nitrogen content, yield, quality and the like.

Description

technical field [0001] The invention belongs to the technical field of agriculture, and in particular relates to a hyperspectral method for measuring the nitrogen content of wheat plants. Background technique [0002] Wheat is the crop with the oldest cultivation, the largest planting area, the largest total output and the largest trade volume in the world. Its planting area ranks third in my country, and it is an important commodity grain and main grain reserve variety; nitrogen is essential for the growth and development of wheat. The most essential mineral nutrient element, its nutritional efficiency directly affects the yield and quality of crops, and is known as the "element of life". In recent years, the amount of nitrogen fertilizer application in my country has continued to increase. While promoting crop production, it has also led to a sharp decline in fertilizer efficiency due to excessive application, and has caused serious resource waste and environmental pollutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
CPCG01N21/3103
Inventor 宋晓黄绍敏许端阳张珂珂郭斗斗张水清岳克查菲娜
Owner INST OF PLANT NUTITUION & RESOURCE ENVIRONMENT HENAN ACADEMY OF AGRI SCI
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