Table 4.

In vitro digestibility and extent of ruminal degradation of the by-products.

By-Product	IVDMD	IVNDFD	D144	E
Sugar beet pulp (dehydrated)	0.929	0.845	0.870	0.542
Ensiled sugar beet pulp	0.940	0.860	0.910	0.575
Sugar beet tops and leaves	0.957	0.851	0.904	0.589
Sugar beet rootlets, hairs, root tips and beet tails	0.873	0.707	0.854	0.483
Grape seeds	0.362	0.064	0.227	0.150
Olive tree leaves	0.745	0.518	0.469	0.254
Almond hulls	0.840	0.502	0.778	0.491
Broccoli stalk hay	0.764	0.575	0.686	0.431
Lettuce leaves	0.967	0.851	0.900	0.572
Asparagus rinds1	0.836	0.640	0.687	0.428
Asparagus rinds2	0.960	0.868	0.919	0.591
Green bean haulms	0.859	0.660	0.809	0.501
Mixture green bean haulms + sugar beet pulp	0.934	0.817	0.894	0.581
Artichoke by-products (ensiled)	0.759	0.592	0.723	0.432
Artichoke by-products (hay)	0.817	0.730	0.791	0.382
Pea haulms	0.893	0.620	0.786	0.539
Broad bean haulms	0.927	0.784	0.877	0.604
Dried tomato pulp	0.683	0.431	0.544	0.340
Pepper by-products (cores)	0.852	0.523	0.779	0.539
Pepper by-products (skins)	0.432	0.245	0.363	0.172
Apple pomace	0.566	0.355	0.523	0.333
Apple and pear pomace	0.599	0.412	0.544	0.328
Citrus pulp (clementine)	0.991	0.938	0.976	0.658
Citrus pulp (lemon)	0.975	0.898	0.956	0.667
Citrus pulp (orange)1	0.989	0.949	0.979	0.658
Citrus pulp (orange)2	0.966	0.890	0.944	0.546

IVDMD = in vitro DM digestibility (g/g DM incubated); IVNDFD = in vitro NDF digestibility (g/g NDF incubated); DM144 = DM disappearance after 144 h of incubation (g/g DM incubated); E = extent of degradation in the rumen for a rate of passage of 0.033 h⁻¹ (g DM degraded/g DM ingested).