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Table 4 Comparative analysis of the normalized redness intensity (NRI) in rice canopy under nitrogen (N) fertilizer and density treatments

From: Evaluation of grain yield based on digital images of rice canopy

Treatments TS JS HS FS LFS MS
N0 0.317 ± 0.006a 0.309 ± 0.002a 0.355 ± 0.003a 0.371 ± 0.001a 0.381 ± 0.002a 0.460 ± 0.002a
N1 0.310 ± 0.004a 0.294 ± 0.001b 0.343 ± 0.004b 0.349 ± 0.001b 0.347 ± 0.008b 0.456 ± 0.006a
N2 0.314 ± 0.003a 0.292 ± 0.000b 0.342 ± 0.004b 0.348 ± 0.003b 0.346 ± 0.005b 0.459 ± 0.003a
N3 0.314 ± 0.008a 0.290 ± 0.001b 0.343 ± 0.003b 0.346 ± 0.002b 0.344 ± 0.003b 0.452 ± 0.002a
D4 0.322 ± 0.005A 0.297 ± 0.008A 0.347 ± 0.006A 0.353 ± 0.011A 0.356 ± 0.014A 0.456 ± 0.006A
D3 0.312 ± 0.003A 0.297 ± 0.010A 0.345 ± 0.007A 0.355 ± 0.012A 0.353 ± 0.017A 0.454 ± 0.004A
D2 0.308 ± 0.005A 0.296 ± 0.008A 0.340 ± 0.007A 0.352 ± 0.012A 0.349 ± 0.020A 0.454 ± 0.004A
D1 0.316 ± 0.006A 0.296 ± 0.008A 0.345 ± 0.007A 0.352 ± 0.013A 0.354 ± 0.020A 0.459 ± 0.003A
  1. TS, JS, HS, FS, LFS and MS indicate the tillering, jointing, heading, filling, late filling and maturity stages of rice, respectively. Different lowercase letters indicate significant differences among nitrogen (N) fertilizer treatments (p < 0.05). Different uppercase letters indicate significant differences among planting density treatments (p < 0.05)