A method for establishing an image evaluation index for non-destructive diagnosis of crop nitrogen nutrition
A technology for image evaluation and establishment of methods, applied in the direction of testing plants/trees, instruments, measuring devices, etc., can solve the problem of not considering the overall impact of nutrient testing, and achieve the effect of avoiding excessive fertilization, increasing yield and low cost
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[0047] 1 Experiment and data
[0048] 1.1 Experimental design
[0049] From 2012 to 2014, in the experimental base of Rugao, National Information Agriculture Center (32°~32°30′ north latitude, 120°20′~120°50′ east longitude), rice and wheat rotation farming, 2 varieties: Shengxuan 6 (V1), Yangmai 18 (V2); 3 levels of nitrogen fertilizer: pure nitrogen 0kg / hm 2 (N0), pure nitrogen 150kg / hm 2 (N1), pure nitrogen 300kg / hm 2 (N2); 2 planting densities: D1 row spacing 40cm (100,000 seedlings / mu), D2 row spacing 20cm (200,000 seedlings / mu). A random split-plot design was adopted, with 12 treatments and 3 repetitions, with a total of 36 plots. Residential Area 35m 2 (7m×5m), drill sowing, the total area is about 1080m 2 . Nitrogen fertilization is carried out twice: when sowing, N0, N1, N2, and the second time at the jointing stage (in mid-March), and the nitrogen fertilization level is the same as when sowing.
[0050] 1.2 Data collection
[0051] 1.2.1 Canopy image acquisi...
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