Method and system for determining nitrogen content of tree leaves in fruit expansion period
A technology of fruit expansion period and nitrogen content, which is applied in the field of agricultural vegetation remote sensing, can solve the problem that the nitrogen content of tree leaves in the fruit expansion period cannot be estimated efficiently, and achieves the effect of simple calculation method, improved accuracy and fewer bands.
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[0109] As an embodiment, the spectral sampling module of the present invention specifically includes:
[0110] A sampling unit, configured to select N sampling points in the leaf samples, where N is a positive integer greater than or equal to 2.
[0111] Four sets of sensitive band spectral value determination units are configured to calculate four sets of sensitive band spectral values by averaging the N sampling points.
[0112] As an embodiment, the four groups of sensitive band spectral values in the present invention include: the leaf spectral value of blue light, the leaf spectral value of green light, the leaf spectral value of red light, and the leaf spectral value of long-wave infrared; wherein, the blue light The wavelength of the blue light is 420-440 nm, the wavelength of the green light is 540-560 nm, the wavelength of the blue light is 670-690 nm, and the wavelength of the blue light is 710-730 nm.
[0113] The beneficial effects of the present invention are...
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