Table 1.

Effect of ensiling on nutritional composition, in vitro dry matter digestibility and total polyphenols content in broccoli by-product (BB), artichoke by-product (AB) and artichoke plant stubble (APS) silages.

Silage	Days of Ensiling								SEM	p-Value
	0	4	7	10	15	30	60	200
Dry matter (g/kg)
BB	174bc	184ab	172bc	197ab	173bc	142d	181ab	154cd	6.79	***
AB	256a	220b	203bcd	201bcd	207bc	183d	192cd	190cd	8.66	***
APS	283abc	291abc	273cd	286abc	268d	277bcd	271cd	258e	4.21	***
Organic matter (g/kg DM)
BB	849a				840a	826b	828b	821b	3.5	***
AB	912				927	912	912	916	9.4	n.s.
APS	839b				849a	837b	833bc	828c	2.3	***
Ether extract (g/kg DM)
BB	20.2b				23.4b	29.1a	23.2b	32.1a	1.97	**
AB	19.6				29.3	25.8	28,0	29.6	3.41	n.s.
APS	26.3b				31.4ab	35.7a	34.7a	34.6a	2.22	*
Crude protein (g/kg DM)
BB	195a				199a	204a	153c	174b	4.6	***
AB	117b				126b	125b	122b	145a	3.7	***
APS	78.7a				78.3a	67.1b	76.9a	78.1a	1.2	***
Neutral detergent fibre (g/kg DM)
BB	395ab				356bc	311d	342cd	430a	11.7	***
AB	589a				530ab	510b	541ab	528ab	17.1	*
APS	547ab				555ab	540b	532b	571a	9.9	**
Acid detergent fibre (g/kg DM)
BB	272b				266b	233c	259b	326a	8.2	***
AB	398				359	353	379	354	13.3	n.s.
APS	358ab				365a	361a	336b	374a	7.3	***
Acid detergent lignin (g/kg DM)
BB	77.9a				65.0b	35.1c	35.1c	63.4b	3.63	***
AB	131a				81b	80b	84b	89b	6.8	***
APS	84.5bc				87.1b	91.9b	77.1c	107.9a	2.67	***
In vitro dry matter digestibility (g/kg DM)
BB	888a				829b	857ab	800b	822b	14.7	**
AB	670b				724ab	723ab	737ab	769a	23.2	*
APS	606b				579c	632a	629ab	615ab	7.1	***
Total polyphenols (g/kg DM)
BB	5.86c				8.85a	9.59a	7.48b	6.73ab	0.308	***
AB	1.96d				7.60c	10.08b	15.29a	7.56c	0.734	***
APS	5.02b				5.47ab	5.95a	5.55ab	4.96b	0.240	**

a–e Different letters in the same row indicate significant difference between days. * p < 0.05; ** p < 0.01; *** p < 0.001; n.s.: non significant.