Corn growing season nitrogen fertilizer application method based on optimized spectral index

A technology of spectral index and application method, which is applied in the field of nitrogen fertilizer application in corn growing season based on optimized spectral index, can solve problems such as fertilization period and unreasonable dosage, and achieve the effect of realizing ecological green development and improving efficient utilization.

Pending Publication Date: 2021-08-17
INNER MONGOLIA AGRICULTURAL UNIVERSITY
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Problems solved by technology

[0003] The rational application of nitrogen fertilizer is an important part of the precise management of nutrients in smart agriculture. The purpose of this invention patent is to combine remote sensing real-time monitoring technology with crop nitrogen f

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  • Corn growing season nitrogen fertilizer application method based on optimized spectral index
  • Corn growing season nitrogen fertilizer application method based on optimized spectral index
  • Corn growing season nitrogen fertilizer application method based on optimized spectral index

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[0042] The specific technical solutions of the present invention are described in conjunction with the examples.

[0043] The method of nitrogen fertilizer application in the growing season of corn based on the optimized spectral index comprises the following steps:

[0044] 1. Total nitrogen balance control:

[0045] K=21×(target yield of one hectare÷1000)+64

[0046] K The amount of nitrogen fertilizer used in the growing season of corn (kg / ha);

[0047] Target yield of one hectare: the average yield of traditional planting by farmers in the past three years.

[0048] 21 is thousand kilograms of nitrogen absorption, references: Liu, J., Liu, H., Huang, S.M., Yang, X.Y., Wang, B.R., Li, X.Y., Ma, Y.B., 2010. Nitrogenefficiency in long-term wheat–maize cropping systems under diverse field sites in China. Field Crops Res. 118, 145–151.64 is the nitrogen surplus under the optimal nitrogen application in previous nitrogen fertilizer experiments.

[0049] The calculation formu...

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Abstract

The invention provides a corn growing season nitrogen fertilizer application method based on an optimized spectral index, which comprises the following steps: (1) nitrogen balance total amount control: controlling the corn growing season nitrogen fertilizer application total amount through nitrogen balance; (2) corn nitrogen nutrition diagnosis: acheiving the real-time monitoring of the nitrogen nutrition index of the corn in the growing season by optimizing the spectral index; and (3) a corn growth season nitrogen fertilizer recommendation algorithm based on the optimized spectral index. According to the method, the nitrogen nutrition status of the corn is monitored in real time by optimizing the spectral index, and a nitrogen balance and critical nitrogen concentration dilution curve is used as a nitrogen fertilizer dosage regulation and control range; determination of the reasonable nitrogen application amount in the corn field is the key of obtaining high target yield, maintaining soil nitrogen fertilizer power and reducing environmental pollution caused by nitrogen application; and theoretical and technical foundations can be laid for accurate management of the nitrogen fertilizer in corn intelligent agriculture, and ecological green development which focuses on production and environmental protection is realized while efficient utilization of nitrogen resources is improved.

Description

technical field [0001] The patent of the present invention relates to the field of nitrogen fertilizer application management in corn fields, specifically a method of nitrogen fertilizer application in corn growing season based on optimized spectral index. Background technique [0002] Corn is one of the three major food crops in my country. According to the latest data from the National Bureau of Statistics, the planting area of ​​corn in 2020 will be 41.26 million hectares, and the output will be 260.67 million tons. Although corn production has remained stable in recent years, the import of corn is still increasing year by year, and has not achieved 100% self-sufficiency. Therefore, increasing corn production on the existing basis is of great significance for ensuring my country's food security. However, the problem of excessive nitrogen fertilizer application in traditional corn planting in my country will not only reduce the utilization rate of nitrogen fertilizer and ...

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/02A01G22/20A01C21/00
CPCG06Q10/04G06Q50/02A01G22/20A01C21/007
Inventor 李斐杨海波唐彧哲红梅张炜健张贺景
Owner INNER MONGOLIA AGRICULTURAL UNIVERSITY
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