Performance, Intestinal Morphology and Microbiology of Broiler Chickens Fed Egg Powder in the Starter Diet

Esmailzadeh, L; Shivazad, M; Sadeghi, AA; Karimitorshizi, M

doi:10.1590/1806-9061-2016-0330

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Brazilian Journal of Poultry Science

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ARTICLES • Rev. Bras. Cienc. Avic. 18 (04) • Oct-Dec 2016 • https://doi.org/10.1590/1806-9061-2016-0330 copy

Performance, Intestinal Morphology and Microbiology of Broiler Chickens Fed Egg Powder in the Starter Diet

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The effect of egg powder inclusion in the pre-starter diet (1-7 days of age) on the performance, and intestinal morphology and microbiology of male broiler chickens was evaluated in a completely randomized design. Starter diets with equal metabolizable energy and crude protein levels were formulated to contain 0, 20, 40, or 60 g egg powder/kg diet. Results showed that body weight, feed intake, feed conversion ratio, and European efficiency index were positively affected (p≤0.05) by egg powder inclusion in the starter diet. Inclusion of 40 g egg powder/kg diet in the starter diet promoted the best performance results. Jejunal villus height and villus to crypt ratio increased (p≤0.05) and intestinal length decreased (p≤0.05) as a result of egg powder inclusion in the starter diet. Egg powder inclusion in the starter diet reduced (p≤0.05E. coli counts, but increased (p≤0.05) lactic acid bacteria counts in the small intestine. The results obtained in the present study indicate that the inclusion of 40 60 g egg powder/kg of starter diet g improved the performance and intestinal health of broilers.

Keywords:
Broilers; egg powder; intestinal microbiology; intestinal morphology; performance; starter diet

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[1] Corresponding author e-mail address Ladan Esmailzadeh Department of Animal Science, Science and Research Branch, Islamic Azad University, Tehran, Iran. Email:ladanesmailzadeh@gmail.com

	Egg powder level				SEM	p-value
	control	20 g/kg	40 g/kg	60 g/kg
Body weight (g)
7 d	172^b	184^ab	199^a	188^a	3.3	0.01
24 d	1132^c	1191^bc	1266^a	1230^ab	16.0	<0.01
42 d	2704^b	2874^a	2953^a	2910^a	33.8	0.03
Feed intake (g)
0-7 d	169^b	172^b	177^a	172^b	1.1	0.02
7-24 d	1459	1496	1534	1529	16.8	0.40
24-42 d	3202	3373	3383	3360	52.7	0.62
0-42 d	4830	5040	5094	5061	53.3	0.31
Feed conversion ratio
0-7 d	0.98^a	0.93^ab	0.89^b	0.91^b	0.012	0.04
7-24 d	1.52^a	1.48^b	1.44^c	1.47^b	0.008	<0.01
24-42 d	2.04	2.00	2.01	2.00	0.011	0.63
0-42 d	1.78^a	1.75^ab	1.72^b	1.74^b	0.007	0.01
European efficiency index	360^b	390^a	407^a	399^a	5.6	<0.01

	Egg powder level			SEM		p-value
	control	20 g/kg	40 g/kg	60 g/kg
E. coli
7 d	6.92^a	6.45^b	5.99^c	5.29^d	0.165	<0.01
42 d	7.86^a	6.94^b	6.91^b	6.70^b	0.133	<0.01
Lactic acid bacteria
7 d	7.92^b	8.07^b	8.15^b	8.80^a	0.113	0.01
42 d	7.39	7.42	7.48	7.46	0.069	0.97
Total count
7 d	7.45^c	7.90^b	8.70^a	8.52^a	0.135	<0.01
42 d	7.59	6.89	7.96	7.12	0.212	0.30

	Egg powder level				SEM	p-value
	control	20 g/kg	40 g/kg	60 g/kg
Villus height (µm)
7 d	582^b	611^b	772^a	621^b	23.2	<0.01
42 d	1165^b	1255^a	1270^a	1263^a	15.3	0.02
Crypt depth (µm)
7 d	102^b	122^a	128^a	128^a	3.5	<0.01
42 d	147^a	123^b	113^b	117^b	3.8	<0.01
Villus/crypt ratio
7 d	5.69	5.04	6.08	4.81	0.209	0.10
42 d	7.93^b	10.2^a	11.2^a	10.8^a	0.38	<0.01
Goblet cell (n/µm of villus)					0.38	<0.01
7 d	11.1^a	9.07^ab	8.98^ab	7.51^b	0.461	0.03
42 d	13.4^a	12.3^ab	11.2^ab	11.0^b	0.38	0.10
Intestinal length, cm/100 g BW					0.38	0.10
7 d	53.9^a	50.1^b	48.8^b	48.6^b	0.72	0.01
42 d	7.42^a	6.76^ab	6.37^b	6.33^b	0.165	0.05