Effects of inclusion of purple prairie clover (Dalea purpurea Vent.) with native cool-season grasses on in vitro fermentation and in situ digestibility of mixed forages

Table 4 In situ ruminal degradation characteristics of dry matter (DM), neutral detergent fiber (aNDF), and crude protein (CP) disappearance of mixtures of purple prairie clover (PPC; Dalea purpurea Vent.) and cool-season grasses in ratios of 0:100, 25:75, 50:50, 75:25 and 100:0. Both PPC and grass were harvested when PPC reached the full flower stage

Items^g	0:100	25:75	50:50	75:25	100:0	SEM^e	P values^f
Items^g	0:100	25:75	50:50	75:25	100:0	SEM^e	P	L	Q
DM
a + b	75.0^ab	79.3^a	77.6^a	74.8^ab	72.5^b	1.20	0.009	0.029	0.01
a	10.4^e	14.3^d	18.3^c	21.8^b	30.5^a	0.39	< 0.001	< 0.001	< 0.001
b	64.6^ab	65.0^a	59.3^b	53.0^c	42.0^d	1.27	< 0.001	< 0.001	< 0.001
c	2.79^b	2.46^b	2.65^b	3.83^b	9.14^a	0.476	< 0.001	< 0.001	< 0.001
Lag	5.1^a	1.2^b	0.0^b	0.0^b	6.0^a	0.62	< 0.001	< 0.001	0.757
ED_0.05	25.9^d	34.0^c	38.8^b	44.6^a	42.0^ab	0.86	< 0.001	< 0.001	< 0.001
aNDF
a + b	79.9^a	80.2^a	80.8^a	70.7^b	61.6^c	1.15	< 0.001	< 0.001	< 0.001
a	10.1^c	12.4^bc	13.2^bc	17.2^b	26.5^a	1.23	< 0.001	< 0.001	0.008
b	69.8^a	67.8^a	67.6^a	53.4^b	35.1^c	2.15	< 0.001	< 0.001	< 0.001
c	2.69^b	2.38^b	1.93^b	2.71^b	5.59^a	0.384	< 0.001	< 0.001	< 0.001
Lag	6.2	3.2	0.0	0.0	4.7	1.49	0.052	0.217	0.008
ED_0.02	40.1^b	44.3^ab	46.4^ab	47.8^a	45.3^ab	1.57	0.049	0.018	0.038
CP
a + b	NA	67.0^b	68.2^b	75.8^ab	78.2^a	2.21	0.015	0.003	0.724
a	NA	23.5	16.4	22.0	19.9	2.42	0.158	0.656	0.339
b	NA	43.5	51.8	53.8	58.3	3.58	0.089	0.018	0.656
c	NA	1.65^c	4.65^bc	8.67^b	13.69^a	1.00	< 0.001	0.007	0.456
Lag	NA	0^b	0^b	4.9^ab	8.6^a	1.45	0.008	0.002	0.245
ED_0.05	NA	33.9	41.0	41.9	29.1	3.20	0.072	0.411	0.015

^a,b,c,dMeans with different lowercased letters in the same row differ (P < 0.05)
^eSEM standard error of the means
^fP values are shown for P overall, L linear effect, Q quadratic effect
^ga: soluble fraction (%); b: potentially degradable fraction (%); a + b: the maximum potential degradability; c: the rate at which b is degraded (%/h); ED_xxx: effective degradability (%) at a ruminal passage rate of 0.05/h for DM, and 0.02/h for aNDF, and 0.05/h for CP; NA: value not be estimated

ISSN: 2049-1891