TABLE 3.

Effect of Pennisetum purpureum additive in late gestation on serum immunoglobulin concentrations of sows^*

Item	P. purpureum, % of diet			p value
	0	5	10	Con versus P. purpureum	Linear	Quadratic
90 days, μg/ml
IgA	65.34 ± 4.78	65.99 ± 6.63	70.34 ± 7.54	.186	.093	.463
IgG	419.93 ± 31.62	414.43 ± 20.87	411.39 ± 20.39	.740	.449	.899
IgM	80.79 ± 9.21	75.15 ± 5.46	76.59 ± 6.20	.206	.200	.213
100 days, μg/ml
IgA	101.18 ± 8.26	111.61 ± 12.90	112.95 ± 9.77	.036	.018	.272
IgG	461.29 ± 25.59	478.30 ± 36.80	502.78 ± 22.41	.012	.003	.741
IgM	146.79 ± 8.91	156.97 ± 8.75	161.69 ± 14.34	.016	.005	.526
At parturition, μg/ml
IgA	136.10 ± 15.40	142.34 ± 13.33	149.38 ± 11.99	.113	.039	.939
IgG	809.47 ± 30.89	803.28 ± 38.22	820.47 ± 41.33	.583	.513	.423
IgM	175.99 ± 19.26	179.71 ± 8.53	188.47 ± 11.88	.141	.056	.645

Values were considered statistically significant when p < .05 and as a trend to significance when .05 ≤ p < .10.

^*Values are means ± SE, n = 10 per treatment.