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. 2020 Nov 13;8:e10311. doi: 10.7717/peerj.10311

Table 3. Chlorophyll fluorescence of noodle rice as influenced by of different biochar levels under low and high N rates.

Treatment F0 FV/Fm φPS2 ETR
S1 S2 S1 S2 S1 S2 S1 S2
Till
N1C 97.33a 96.50a 0.716d 0.7725c 0.23d 0.17c 96.49c 69.64e
N2C 80.33bc 89.28ab 0.773c 0.8473a 0.22bcd 0.27bc 94.49c 111.59d
N1B1 73.67c 87.48ab 0.736cd 0.7804bc 0.24bcd 0.26bc 100.98bc 107.43cd
N1B2 77bc 90.58a 0.836ab 0.8429a 0.30abc 0.29ab 127.71b 122.85
N1B3 83.67a 81.54ab 0.869a 0.8662a 0.36a 0.33ab 152.24a 139.50bc
N2B1 84.67b 89.19ab 0.826b 0.8246ab 0.31ab 0.29ab 131.84ab 121.29b
N2B2 77.33bc 88.18ab 0.848ab 0.8578a 0.36a 0.37a 150.08a 156.24a
N2B3 81.33a 84.88b 0.863ab 0.8562a 0.39a 0.35ab 162.10a 147.36ab
Head
N1C 97.59a 90.59a 0.779c 0.794c 0.19c 0.16d 78.4c 69.25d
N2C 93.95ab 86.95b 0.765c 0.782c 0.25abc 0.22cd 105.6 90.34cd
N1B1 87.93ab 80.93bc 0.791bc 0.807bc 0.23abc 0.23cd 96.5abc 96.52bc
N1B2 87.92abc 80.92bc 0.849a 0.861a 0.28abc 0.29bc 117.5abc 120.67ab
N1B3 82.54c 75.54b 0.869a 0.880a 0.30abc 0.34a 127.2abc 142.28a
N2B1 89.25ab 82.25bc 0.831ab 0.844ab 0.21bc 0.30ab 86.5bc 125.62ab
N2B2 82.62b 75.62bc 0.861a 0.872a 0.36z 0.34a 150.9a 141.37a
N2B3 85.59bc 78.59c 0.863a 0.874a 0.33ab 0.37a 139.5ab 154.08a
Mat
N1C 94.59a 86.9a 0.785bc 0.794c 0.14e 0.18bc 56.80e 73.83bc
N2C 90.95ab 89.28a 0.767c 0.847ab 0.18de 0.27ab 75.76de 111.59ab
N1B1 93.59a 78.91ab 0.867a 0.881a 0.20cde 0.27ab 82.32cde 112.91ab
N1B2 79.54c 75.62c 0.862a 0.877a 0.29ab 0.30ab 122.61ab 124.89ab
N1B3 85.96abc 78.59ab 0.846ab 0.876a 0.25bcd 0.11c 103.86bcd 46.97c
N2B1 86.25abc 89.19a 0.824abc 0.824bc 0.26abc 0.29ab 110.44abc 121.29ab
N2B2 82.59bc 88.18a 0.867a 0.857ab 0.33a 0.37a 138.92a 156.24a
N2B3 79.62c 84.88ab 0.831ab 0.856ab 0.29ab 0.35a 123.85ab 147.36a
SOV F0 FV/Fm φPS2 ETR
Biochar (B) ** ** ** **
Nitrogen(N) ns ** ** *
Season(S) * ns ns ns
BxN ** ns ** **
BxS ns ns ns ns
NxS ns ns ns ns
BxNxS ns ns ns ns

Notes.

F0
minimal fluorescence
Fv/Fm
Maximum fluorescence

φPS2-ETR-electron transport rate, N 1C–N; lower dose + Control (no biochar), N 2C–N; higher dose + Control (no biochar), N 1B1–N; lower dose + Biochar 20 t ha −1, N1B2–N; lower dose + Biochar 40 t ha−1, N1B3–N; lower dose + Biochar 60 t ha−1, N2B 1–N; higher dose + Biochar 20 t ha−1, N2B2–N; higher dose + biochar 40 t ha −1, N2B3–N; higher dose + Biochar 60 t ha−1, Values followed by the same letters, within column, are not significantly different at P ≤ 0.05. SOV-source of variation, ** indicate the significant difference P ≥ 0.01 and * indicate P = 0.01 − 0.05, Data were averaged year wise and analyzed.