Hyperspectral estimation method for chlorophyll contents at different rice growth periods

A technology of chlorophyll content and growth period, applied in the agricultural field, can solve the problems of changes in chlorophyll content, easy decomposition, and easy damage to plant leaf tissue structure.

Inactive Publication Date: 2017-08-08
NORTHWEST A & F UNIV
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Problems solved by technology

At present, various methods can be used to measure chlorophyll content, but the traditional method is not only time-consuming and laborious, but also easily damages the tissue structure of plant leaves during the picking process.
In addition, because the structure of chlorophyll is unstable and easy to decompose, the final measured chlorophyll content may change

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  • Hyperspectral estimation method for chlorophyll contents at different rice growth periods
  • Hyperspectral estimation method for chlorophyll contents at different rice growth periods
  • Hyperspectral estimation method for chlorophyll contents at different rice growth periods

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Embodiment Construction

[0027] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] 1 Materials and methods

[0029] 1.1 Overview of the study area

[0030] The research area is the rice demonstration base in Yesheng Town, Qingtongxia City, Ningxia. The area is located in the northwest inland, at the intersection of the eastern monsoon region and the western arid region. It belongs to the mid-temperate continental arid climate. There is no severe cold in winter and no severe heat in summer. The temperature is 8℃, the frost-free period is 176 days, the annual evaporation is 1400nm, and the annual precipitation is 260mm, mainly concentrated in July to September. The landform type is the Yellow River valley plain, with an altitude of 1200m, flat topography and deep soil layer; the soil is man-made soil for irrigation and silting and dry farming, with sandy texture, low soil organic mat...

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Abstract

The invention discloses a hyperspectral estimation method for chlorophyll contents at different rice growth periods. The method belongs to the field of agricultural technology, and comprises the following steps of determining canopy spectrums, determining chlorophyll contents and processing data. According to the method, aiming at a rice elongation stage, a heading period, a milk-ripe stage and a dough stage in northwest region, through analyzing the correlation of canopy reflectance and chlorophyll content at each growth period, a rice chlorophyll content inversion model based on a sensitive band and NDVI (Normalized Difference Vegetation Index) is built, the model inversion accuracy is compared, the correlation of canopy reflectance and chlorophyll contents at different growth periods of the rice is analyzed, and a theoretical basis is provided for utilizing a hyperspectral remote sensing technology for nondestructively, quickly and efficiently estimating rice canopy chlorophyll content research.

Description

technical field [0001] The invention belongs to the field of agricultural technology, in particular to a method for hyperspectral estimation of chlorophyll content in different growth stages of rice. Background technique [0002] Chlorophyll content is the main agronomic parameter of plants and an important indicator of plant photosynthesis capacity, leaf nitrogen content, and growth and development. Changes in chlorophyll content are important indicators for monitoring plant growth. The determination of chlorophyll content is a problem often encountered in agricultural scientific research and agricultural production. At present, various methods can be used to measure chlorophyll content, but the traditional method is not only time-consuming and laborious, but also easily damages the tissue structure of plant leaves during the picking process. In addition, because the structure of chlorophyll is unstable and easy to decompose, the final measured chlorophyll content may chan...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/55
CPCG01N21/31G01N21/55G01N2021/3188
Inventor 常庆瑞刘京陈涛
Owner NORTHWEST A & F UNIV
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