Fig. 2.

Dynamic changes in (A) the daily and (B) the cumulative N₂O–N fluxes of soil applied with the urine samples from steers fed RSC (dry matter basis). The fitted curves of the cumulative N₂O–N flux were: Y = 4,492 – 6,356e^−0.318X (R² = 0.83, 0 RSC, P < 0.001), Y = 4,128 – 5,786e^−0.353X (R² = 0.77, 2.7% RSC, P < 0.001), Y = 5,627 – 7,646e^−0.259X (R² = 0.60, 5.4% RSC, P < 0.001), Y = 6,317 – 8,293e^−0.293X (R² = 0.78, 8.0% RSC, P < 0.001). Dashed lines represented the fitted curves of treatments. Error bars denoted the least squares mean of the cumulative N₂O–N fluxes on each day. Vertical bars denoted the standard errors of the mean (n = 8). RSC = rapeseed cake; DW = dry weight.