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Table 11 Average manure composition on monthly basis

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

Parameters June July August September October
CH4 concentration (ppm) 2.2 d* ± 0.0 2.8 c ± 0.2 2.9 bc ± 0.2 3.3 ab ± 0.2 3.5 a ± 0.7
CO2 concentration (ppm) 380.2 b ± 5.9 486.2 a ± 19.4 459.3 a ± 21.5 404.0 b ± 19.0 368.6 b ± 14.3
N2O concentration (ppm) 1.1 a ± 0.2 1.0 a ± 0.2 1.1 a ± 0.2 0.6 b ± 0.0 0.4 b ± 0.0
CH4 FR (g m-2d-1) 1.1 d ± 0.0 1.4 c ± 0.1 1.4 bc ± 0.1 1.6 ab ± 0.1 1.7 a ± 0.3
CO2 FR (g m-2d-1) 507.6 b ± 7.9 649.2 a ± 26.0 613.3 a ± 21.5 539.4 b ± 19.0 492.1 b ± 14.3
N2O FR (g m-2d-1) 1.4 a ± 0.3 1.4 a ± 0.2 1.5 a ± 0.3 0.8 b ± 0.0 0.5 b ± 0.0
CH4 EF (g d-1 hd-1) 40.5 b ± 1.2 52.7 ab ± 3.8 54.2 b ± 3.8 62.4 a ± 2.3 63.7 a ± 11.6
CO2 EF(g d-1 hd-1) 19487 b ± 624 24958 a ± 326 23584 a ± 326 20693 b ± 143 18541 b ± 431
N2O EF (g d-1 hd-1) 55.2 a ± 11.0 53.3a ± 9.3 58.2 a ± 9.6 29.6b ± 1.4 17.7 b ± 0.9
CH4 EF (g d-1 AU-1) 53.2 ab ± 7.9 57.6 a ± 6.7 51.2 b ± 10.2 52.8 ab ± 6.2 52.0 ab ± 14.9
CO2 EF(kg d-1 AU-1) 25.5 a ± 2.6 26.9 a ± 2.0 22.2 b ± 2.9 17.5 c ± 1.8 15.1 c ± 0.8
N2O EF(g d-1 AU-1) 67.0 a ± 29.0 57.7 a ± 18.5 55.8 a ± 27.7 24.9 b ± 8.1 14.5 c ± 2.0
  1. *Values followed by the same letter in row are not significantly different at P ≤ 0.05