. 2013 Jan;26(1):72–81. doi: 10.5713/ajas.2012.12277

Table 5.

Effects of soybean small peptide (SSP) infusion into rumen at the rates of 0 (Control), 100 (SSP100), 200 (SSP200) and 300 (SSP300) g/d on digestion of nutrient at different digestive sites of Luxi Yellow cattle (n = 4)

Item	Treatment				SEM¹	Contrast²

	Control	SSP100	SSP200	SSP300		L	Q
DM
Flux to duodenum (kg/d)	4.15^a	4.15^a	4.07^a	3.97^b	2.675	<0.001	<0.001
Flux to ileum (kg/d)	3.21	3.18	3.15	3.14	3.227	0.381	0.677
Fecal flux (kg/d)	2.71^a	2.62^b	2.59^bc	2.53^c	2.569	0.001	0.002
Apparent digestion, of intake (g/100 g)
Rumen	43.02^b	43.14^b	44.12^b	45.49^a	0.918	0.067	0.021
Small intestine	12.92	13.48	12.63	11.4	1.092	0.184	0.275
Large intestine	6.94	7.79	7.65	8.39	1.055	0.189	0.436
Total tract	62.88^b	64.41^a	64.40^a	65.28^a	0.905	<0.001	0.002
OM
Flux to duodenum (kg/d)	3.93^a	3.97^a	3.91^a	3.80^b	2.373	0.123	0.153
Flux to ileum (kg/d)	3.05	3	2.97	2.96	3.319	0.183	0.399
Fecal flux (kg/d)	2.61^a	2.47^b	2.47^b	2.42^b	2.774	<0.001	0.001
Apparent digestion, of intake (g/100 g)
Rumen	47.54^b	47.04^b	47.80^b	49.26^a	0.807	0.981	0.25
Small intestine	11.77	12.83	12.64	11.23	1.15	0.713	0.484
Large intestine	5.83	7.13	6.62	7.29	1.072	<0.001	0.001
Total tract	65.13^b	67.00^a	67.05^a	67.79^a	0.943	<0.001	0.001
NDF
Flux to duodenum (kg/d)	2.17^a	2.11^ab	2.15^ab	2.09^b	2.532	0.042	0.136
Flux to ileum (kg/d)	2.08^a	1.98^ab	1.99^ab	1.94^b	2.848	0.022	0.04
Fecal flux (kg/d)	1.73^a	1.71^a	1.66^b	1.61^c	2.224	0.001	0.004
Apparent digestion, of intake (g/100 g)
Rumen	48.77	50.28	49.26	50.81	0.992	0.042	0.136
Small intestine	2.22	2.91	3.85	3.42	1.13	0.177	0.31
Large intestine	8.27	6.22	7.76	7.68	1.106	0.951	0.582
Total tract	59.26^c	59.42^c	60.87^b	61.91^a	0.863	0.001	0.004
ADF
Flux to duodenum (kg/d)	1.32^b	1.34^ab	1.34^ab	1.38^a	2.328	0.068	0.183
Flux to ileum (kg/d)	1.26	1.24	1.22	1.26	2.627	0.95	0.66
Fecal flux (kg/d)	1.09	1.05	1.04	1.05	2.366	0.122	0.084
Apparent digestion, of intake (g/100 g)
Rumen	34.80^a	33.70^ab	33.84^ab	31.84^b	1.098	0.068	0.183
Small intestine	3.07	4.84	5.55	5.61	1.246	0.068	0.137
Large intestine	8.13	9.52	9.13	10.44	1.161	0.145	0.36
Total tract	45.99	48.06	48.53	47.90	1.116	0.122	0.085
N
Intake (g/d)	119.1^d	130.4^c	142.1^a	153.2^b	0.71	<0.001	<0.001
Flux to duodenum (g/d)	121.7	125.0	129.6	132.9	1.71	0.019	0.072
Flux to ileum (g/d)	51.84	53.31	58.29	62.3	1.611	0.008	0.032
Fecal flux (g/d)	48.07	47.18	48.91	49.39	1.152	0.406	0.649
Urinary (g/d)	52.41^a	57.65^b	55.37^c	63.94^d	0.908	<0.001	<0.001
Retain nitrogen (g/d)	18.65^c	25.54^b	37.77^a	39.83^a	1.057	<0.001	<0.001

SEM = Standard error of mean.

p values for the linear (L) or quadratic (Q) effects of SSP infused at the rates 0, 100, 200, 300 g·cattle⁻¹·d⁻¹.

^a–d

Means within a row with different superscript letter differ (p<0.05).