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Table 10 Analysis of greenhouse gas emissions based on treatment

From: The effect of feeding high fat diet to beef cattle on manure composition and gaseous emission from a feedlot pen surface

Sampling date Manure composition Treatments
control Low fat Medium fat High fat
20-Jun-13 CH4 concentration (ppm) 2.2 ab* ± 0.0 2.2 a ± 0.2 2.3 b ± 0.2 2.1 a ± 0.0
CO2 concentration (ppm) 378.0 a ± 24.0 378.3 a ± 17.9 390.0 a ± 40.4 374.3 a ± 15.8
N2O concentration (ppm) 0.9 a ± 0.1 1.2 a ± 0.5 0.8 a ± 0.4 1.4 a ± 0.4
CH4 FR (g m-2 d-1) 1.1 a ± 0.0 1.1 a ± 0.1 1.1 a ± 0.1 1.0 a ± 0.0
CO2 FR (g m-2 d-1) 504.8 a ± 32.0 505.2 a ± 23.9 520.8 a ± 54.0 499.8 a ± 21.1
N2O FR (g m-2 d-1) 1.2 a ± 0.2 1.6 a ± 0.6 1.1 a ± 0.5 1.8 a ± 0.6
  CH4 EF (g AU-1 d-1) 54.3 a ± 8.5 53.4 a ± 9.4 55.7 a ± 6.3 51.4 a ± 6.0
  CO2 EF (kg AU-1 d-1) 25.8 a ± 2.8 24.7 a ± 2.9 27.1 a ± 2.2 25.9 a ± 1.7
  N2O EF (g AU-1 d-1) 62.2 a ± 8 .9 78.2 a ± 26.5 54.5 a ± 20.4 93.8 a ± 35.4
30-Jul-13 CH4 concentration (ppm) 2.8 ab ± 0.3 2.8 b ± 0.1 3.1 a ± 0.2 2.6 b ± 0.1
CO2 concentration (ppm) 467.9 b ± 70.3 485.4 b ± 67.0 518.0 a ± 75.0 473.5 b ± 58.8
N2O concentration (ppm) 1.0 a ± 0.4 0.8 a ± 0.2 1.3 a ± 0.1 1.0 a ± 0.3
CH4 FR (g m-2 d-1) 1.4 ab ± 0.2 1.3 b ± 0.0 1.5 a ± 0.1 1.3 b ± 0.1
CO2 FR (g m-2 d-1) 624.7 b ± 93.9 648.2 b ± 89.5 691.7 a ± 100.2 632.2 b ± 78.5
N2O FR (g m-2 d-1) 1.4 a ± 0.5 1.1 a ± 0.3 1.7 a ± 0.1 1.4 a ± 0.4
  CH4 EF (g AU-1 d-1) 58.4 ab ± 5.6 54.8 a ± 6.3 64.3 b ± 4.2 52.8 a ± 3.6
  CO2 EF (g AU-1 d-1) 26.2 a ± 1.6 26.1 a ± 2.9 29.6 b ± 2.2 25.9 a ± 1.7
  N2O EF (kg AU-1 d-1) 58.6 ab ± 23.5 42.5 a ± 7.0 74.1 b ± 9.5 55.5 ab ± 13.2
20-Aug-13 CH4 concentration (ppm) 3.2 a ±1.0 2.8 a ± 0.4 2.7 a ± 0.5 2.8 a ± 0.7
CO2 concentration (ppm) 431.5 a ± 48.3 471.1 a ± 93.1 487.4 a ± 131.1 447.0 a ± 64.2
N2O concentration (ppm) 0.9 a ± 0.4 1.4 a ± 0.6 0.9 a ± 0.4 1.2 a ± 0.3
CH4 FR (g m-2 d-1) 1.6 a ± 0.5 1.4 a ± 0.2 1.3 a ± 0.2 1.4 a ± 0.4
CO2 FR (g m-2 d-1) 576.2 a ± 64.4 629.0 a ± 124.3 650.9 a ± 175.1 596.9 a ± 85.8
N2O FR (g m-2 d-1) 1.3 a ± 0.6 1.9 a ± 0.8 1.2 a ± 0.4 1.7 a ± 0.8
  CH4 EF (g AU-1 d-1) 57.9 a ± 15.3 49.0 a ± 2.6 49.7 a ± 6.0 48.2 a ± 9.0
  CO2 EF (kg AU-1 d-1) 21.2 a ± 1.6 22.1 a ± 1.6 24.3 a ± 4.3 21.1 a ± 1.8
  N2O EF (g AU-1 d-1) 48.5 a ± 25.6 67.3 a ± 31.6 48.5 a ± 18.7 59.1 a ± 28.6
18-Sep-13 CH4 concentration (ppm) 3.3 a ±0.3 3.4 a ± 0.7 3.1 a ± 0.5 3.6 a ± 0.7
CO2 concentration (ppm) 389.3 a ± 28.1 381.1 a ± 60.6 423.3 a ± 70.3 422.2 a ± 44.7
N2O concentration (ppm) 0.6 ± 28.1 0.6 ± 60.6 0.6 ± 70.3 0.6 ± 44.7
CH4 FR (g m-2 d-1) 1.6 a ± 0.1 1.6 a ± 0.4 1.5 a ± 0.3 1.7 a ± 0.4
CO2 FR (g m-2 d-1) 519.9 a ± 37.5 508.9 a ± 80.9 565.2 a ± 93.9 563.8 a ± 59.7
N2O FR (g m-2 d-1) 0.8 a ± 0.3 0.7 a ± 0.1 0.7 a ± 0.3 0.8 a ± 0.4
  CH4 EF (g AU-1 d-1) 54.2 a ± 6.0 51.6 a ± 5.7 50.8 a ± 4.0 54.7 a ± 7.7
  CO2 EF (kg AU-1 d-1) 17.3 ab ± 0.6 16.1 b ± 1.1 19.1 a ± 2.1 17.9 ab ± 1.6
  N2O EF (g AU-1 d-1) 26.9 a ± 7.8 24.3 a ± 4.5 24.4 a ± 9.2 23.9 a ± 9.4
9-Oct-13 CH4 concentration (ppm) 4.3 a ± 1.4 3.9 a ± 1.1 2.5 a ± 0.2 3.4 a ± 0.2
CO2 concentration (ppm) 367.2 a ± 35.1 381.6 a ± 23.9 345.7 a ± 11.3 379.8 ± 2.9
N2O concentration (ppm) 0.4 a ± 0.0 0.3 a ± 0.1 0.4 a ± 0.1 0.4 a ± 0.0
CH4 FR (g m-2 d-1) 2.1 a ± 0.7 1.9 a ± 0.5 1.2 a ± 0.1 1.6 a ± 0.1
CO2 FR (g m-2 d-1) 490.3 a ± 46.9 509.5 a ± 31.9 461.6 a ± 15.0 507.2 a ± 3.9
N2O FR (g m-2 d-1) 0.5 a ±0.0 0.5 a ± 0.1 0.5 a ± 0.1 0.5 a ± 0.0
  CH4 EF (g AU-1 d-1) 62.2 a ± 16.3 59.1 a ± 15.5 38.8 a ± 1.5 47.8 a ± 5.2
  CO2 EF (kg AU-1 d-1) 14.9 a ± 0.3 15.8 a ± 1.2 15.0 a ± 0.0 14.7 a ± 0.7
  N2O EF (g AU-1 d-1) 14.6 a ± 0.7 14.0 a ± 2.1 15.7 a ± 2.8 13.6 a ± .09
  1. *Values followed by the same letter in row are not significantly different at P ≤ 0.05; where, FR flux rate from pen surface (g m-2 d-1), ER emission rate from pen surface (g hd-1 d-1)