Table 6.

Effects of experimental diets on manure characteristics (mean ± standard deviation, n = 4).

Items	CON	RCP	AD	CD	p-Value
					Protein	Acidifying
pH at the spot	7.39 ± 0.46	6.94 ± 0.08	7.03 ± 0.12	6.99 ± 0.04	0.06	0.20
Dry matter (g/kg)	97.7 ± 9.2	93.2 ± 8.9	86.4 ± 15.9	104.5 ± 10.4	0.15	0.99
Ash (g/kg)	18.90 ± 1.56	19.27 ± 1.62	18.77 ± 2.40	19.65 ± 1.38	0.30	0.83
NH4-N (g/kg)	4.03 ± 0.51	3.23 ± 0.52	4.62 ± 0.73	3.90 ± 0.47	0.02	0.04
Total-N (g/kg)	6.88 ± 0.53	5.93 ± 0.58	7.28 ± 0.59	6.75 ± 0.42	0.04	0.07
K (g/kg)	3.98 ± 0.39	3.70 ± 0.10	4.19 ± 0.18	4.08 ± 0.45	0.20	0.07
Na (g/kg)	0.65 ± 0.09	0.64 ± 0.09	0.69 ± 0.02	0.68 ± 0.10	0.82	0.43
P (g/kg)	1.32 ± 0.12	1.24 ± 0.09	1.18 ± 0.15	1.36 ± 0.17	0.44	0.87
Cl (g/kg)	0.64 ± 0.07	0.69 ± 0.06	0.74 ± 0.08	0.67 ± 0.17	0.91	0.51
Ca (g/kg)	1.89 ± 0.14	2.25 ± 0.52	1.85 ± 0.65	2.25 ± 0.38	0.06	0.90
Acetic acid (g/kg)	6.56 ± 1.86	6.79 ± 1.91	7.18 ± 2.05	9.35 ± 0.90	0.19	0.09
Propionic acid (g/kg)	2.44 ± 0.37	2.97 ± 0.62	2.56 ± 0.61	2.62 ± 0.46	0.26	0.64
Iso-Butyric acid (g/kg)	0.72 ± 0.08	0.70 ± 0.10	0.72 ± 0.17	0.63 ± 0.08	0.28	0.46
Butyric acid (g/kg)	3.04 ± 0.67	2.65 ± 0.40	2.36 ± 0.89	3.24 ± 0.74	0.31	0.85
Iso-Pentanoic (g/kg)	1.00 ± 0.09	0.97 ± 0.11	1.00 ± 0.18	0.96 ± 0.10	0.41	0.82
Pentanoic acid (g/kg)	0.38 ± 0.07	0.49 ± 0.09	0.35 ± 0.12	0.41 ± 0.08	0.08	0.25
Total VFA (g/kg)	14.14 ± 2.76	14.57 ± 2.52	14.17 ± 3.70	17.20 ± 2.27	0.19	0.31
Buffer capacity	0.026 ± 0.003	0.040 ± 0.005	0.036± 0.004	0.034± 0.004	0.001	0.10
Manure TIC (mol/kg)	0.184 ± 0.034	0.114 ± 0.016	0.105 ± 0.008	0.112 ± 0.017	0.009	0.002

CON = control diet, RCP = reduced crude protein diet, AD = acidifying diet, CD = combined diet, VFA: volatile fatty acids, TIC: total inorganic carbon.