Winter wheat canopy SPAD value integration spectrum monitoring model establishing method
A technology for model building and spectral monitoring, applied in the direction of color/spectral characteristic measurement, measuring devices, and material analysis through optical means, which can solve problems such as rare and sensitive to changes
Active Publication Date: 2019-08-02
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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The "trilateral" parameter can better reflect the spectral characteristics of green vegetation, and is more sensitive to the changes in chlorophyll content and nitrogen content. The coefficient reached 0.788; Yao Fuqi and others pointed out that the traditional red edge parameter and the new red edge parameter have a good correlation with the SPAD value at different growth stages, so it can be seen that the estimation model of plant chlorophyll content is established by using the "trilateral" parameter It is feasible, but there are few researches on the monitoring of chlorophyll content by selecting spectral transformation and "trilateral" parameters at the same time
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[0041] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.
[0042] The tested variety of winter wheat was Zhongmai 175, which was sown on October 13, 2017, and the row spacing of winter wheat was set at 30 cm. It was harvested on June 6 of the following year, and the growth period reached 236 days. The test set up 15 plots in total, which were divided into 5 nitrogen fertilizer treatments. Fertilization was applied twice during the whole growth period, and compound fertilizer was app...
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The invention discloses a winter wheat canopy SPAD value integration spectrum monitoring model establishing method. In the invention, according to winter wheat canopy spectral reflectivity of each growth period and plant canopy SPAD value data under different nitrogen application levels, a relationship between basic transformation of spectral information and a "three-sided" parameter on the plantcanopy SPAD value is analyzed, a suitable model combination considering a characteristic of each growth period and possessing high precision is provided, and a principal component estimation model ofthe plant canopy SPAD value, which integrates the basic transformation of the spectral information, the "three-sided" parameter and other independent variables, is constructed. Effects of a spectrum monitoring birth period constraint and other background noises are broken through, and a theoretical basis and technical support are provided for winter wheat canopy SPAD value hyperspectral accurate diagnosis of during a whole growth period.
Description
technical field [0001] The invention relates to the technical field of agricultural planting, in particular to a method for establishing a winter wheat canopy SPAD value comprehensive spectrum monitoring model. Background technique [0002] Chlorophyll (SPAD) is one of the important biochemical parameters in the process of plant growth. Its content is a good indicator for evaluating the nutritional status, growth status and photosynthetic capacity of plants. Yield evaluation has important theoretical and practical significance. The traditional method of monitoring chlorophyll content through destructive sampling is not only time-consuming and laborious, but also difficult to meet the requirements of rapid non-destructive testing on the spot; however, with the rapid development of spectral technology in recent years, the spectral spatial and temporal resolution has been greatly improved, and timely acquisition of crop growth status and The photosynthetic production capacity ...
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Login to View More IPC IPC(8): G01N21/359G01N21/3563G01N21/25
CPCG01N21/25G01N21/3563G01N21/359G01N2021/1797
Inventor 张宝忠彭致功陈鹤魏征蔡甲冰林少喆刘露韩娜娜张倩
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES