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Non-destructive precise determination method for biophysical parameters of cotton

A biophysical, non-destructive technology, applied in the field of agricultural remote sensing engineering, can solve the problems of small applicable area, low precision, and inability to monitor crop growth conditions in large areas in real time, and achieve the effect of simple operation and high precision

Inactive Publication Date: 2006-09-27
NANJING UNIV
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AI Technical Summary

Problems solved by technology

However, the conventional indoor biochemical method and the traditional wide-spectrum remote sensing technology are used to measure the biophysical parameters of crops. Not only is the accuracy low, time-consuming and laborious, but also the applicable area is small, and it cannot monitor the growth status of crops in real time.

Method used

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  • Non-destructive precise determination method for biophysical parameters of cotton
  • Non-destructive precise determination method for biophysical parameters of cotton
  • Non-destructive precise determination method for biophysical parameters of cotton

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Embodiment Construction

[0034] (1) Instrument used: ASD series field spectroradiometer. Manufactured by Analytical Spectral Devices. Suitable for applications ranging from remote sensing surveys, crop monitoring, forest research to industrial lighting surveys, oceanographic research and mineral exploration. The spectrometer used in this experiment is FieldSpec  FR, the measurable spectral range is 350-2500nm, and the spectral resolution is 3-10nm.

[0035] (2) Materials and design of the test site: The test site was set up in Datian, Zhangjiagang City, Jiangsu Province, and the test site was located at 31°50' north latitude and 120°49' east longitude. The soil of the experimental site is sandy loam, the soil is relatively uniform, and the soil fertility is medium. The cotton variety is Sumian No. 3, a large-scale production variety in this area. It is planted in large and small rows, with a large row of 80 cm and a small row of 40 cm. The planting density is 45,000 plants / hm in the north-south di...

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Abstract

This invention relates to a non-destructive precise determination method for biophysical parameters of cotton. To the feature and growth characteristic of cotton, selecting SAVI2 and RVI (precision more than 80%) with high precision for LAI and CCD measurement on middle and final period; finding out a optimal wave band combination for NDVI as 705nm (wave width 20nm) and 780nm (wave width 40nm); and presents an empirical regression equation as Y=0.5287*R780 -0.202*R705+2.4575 for LAI measurement by high-spectrum reflection rate. Compared with prior art, this invention has precision more than 81.8% with simple process and no damage.

Description

1. Technical field [0001] The invention belongs to the technical field of agricultural remote sensing engineering, and in particular relates to a method for rapid and non-damaging hyperspectral accurate measurement of main biophysical parameters of cotton. 2. Background technology [0002] In traditional agricultural production management, in order to better grasp the growth status of crops, timely and accurately find problems in the process of crop growth and development, so as to take corresponding agricultural management measures to solve the nutritional needs of crops in the process of growth and development, people Some crop growth parameters are often used to monitor the growth and development of crops, such as crop biomass, chlorophyll content, chlorophyll density (the chlorophyll content of crops planted per unit land area, CCD), leaf area index (LAI) and other biophysical parameters and N , P, K content of nutrients and other biochemical parameters. The conventiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/27
Inventor 范亚民李建龙赵德华干晓宇潘永年
Owner NANJING UNIV
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