Rice growing seasons

(A)

Treatments (B)

Biochar amendments and irrigation practices

Grain yield (kg/ha)

Harvest Index (%)

Water productivity

kg yield/m³ water

Water required

(L⁻¹ kg rice production

Cumulative CH₄ flux (kg/ha/season)

GWP (kg CO₂ eq·ha⁻¹)

GHGI

(kg $C{H}_4^{-1}$ kg grain yield/season)

Wet season (Rainfed aman)

T1: F0CI

1550h

30.9f

0.184

5400b

169.6bc

4240bc

0.109a

T2: F1CI

4050f

41.7de

0.204

4900c

183.5b

4587ab

0.045c

T3: F2CI

4200ef

42.5cd

0.214

4600cd

171.6bc

4290bc

0.040c

T4: F3CI

4000ef

39.7de

0.221

4500d

163.5c

4087bc

0.041c

T5: F4CI

3850f

38.5e

0.228

4300cd

155.6cd

3890c

0.04c

T6: F0AWDI

1750gh

31.8ef

0.254

3900de

129.5e

3237d

0.074b

T7: F1AWDI

4100ef

41,6d

0.373

2700f

135.6de

3497cd

0.033d

T8: F2AWDI

4380e

43.5cd

0.415

2400fg

121.7ef

3042e

0.027e

T9: F3AWDI

4250ef

41.2de

0.427

2300g

115.5f

2656f

0.027e

T10: F4AWDI

4160ef

40.3d

0.435

2200g

97.9g

2447g

0.023e

Dry season (Boro)

T1: F0CI

1850gh

30.5f

0.165

6000a

177bc

4425b

0.095ab

T2: F1CI

5500d

47.2ab

0.205

4900c

217a

5425a

0.039d

T3: F2CI

6580ab

48.3a

0.227

4600cd

185ab

4625ab

0.028e

T4: F3CI

6250bc

46.6b

0.239

4400de

176bc

4400b

0.028e

T5: F4CI

5860cd

44.2c

0.223

4500d

163c

4075bc

0.027e

T6: F0AWDI

2180g

32.6ef

0.264

3800e

155cd

3875c

0.071b

T7: F1AWDI

5670cd

44.7c

0.436

2300g

169bc

4225bc

0.029e

T8: F2AWDI

6750a

48.5a

0.523

2000h

151d

3750c

0.023e

T9: F3AWDI

6480b

46.9b

0.520

1900hi

125ef

3125de

0.019e

T10: F4AWDI

6050c

44.5c

0.530

1800i

98.6g

2465g

0.016f

ANOVA

A

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B

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A × B

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