Heat-resistant bacterial phytase in broiler pelleted diets

Carlos, TC de F; Barbosa, LCGS; Shiroma, NN; Dari, RL; Baolin, G; Yongcheng, W; Araújo, CS da S; Araújo, LF

doi:10.1590/1516-635x170145-48

Acessibilidade / Reportar erro

Brasil

Brazilian Journal of Poultry Science

Español English

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Articles • Rev. Bras. Cienc. Avic. 17 (1) • Jan-Mar 2015 • https://doi.org/10.1590/1516-635x170145-48 copy

Heat-resistant bacterial phytase in broiler pelleted diets

Authorship SCIMAGO INSTITUTIONS RANKINGS

The objective of the study was to evaluate the effects of a heat-resistant bacterial phytase added to pelleted diets on mineral digestibility, live performance, carcass traits, and bone quality of broilers. Three treatments were evaluated: Positive control; negative control, with 0.10 points reduction in calcium level and 0.15 points reduction in available phosphorus level; and negative control + phytase at 500 FTU/kg. Mineral digestibility and bone quality results demonstrated that the evaluated phytase resisted pelleting as it increased the utilization of the minerals present in the diet.

Performance; digestibility; enzyme; phytate; phosphorus; broiler nutrition

Ingredients, kg	Starter		Grower		Finisher
Ingredients, kg	PC*	NC**	PC	NC	PC	NC
Corn	58.20	58.97	62.55	63.33	66.82	67.60
Soybean meal	35.58	35.35	30.55	30.32	26.60	26.43
Dicalcium phosphate	1.76	0.95	1.31	0.49	1.11	0.30
Soybean oil	2.00	2.00	3.26	3.26	3.19	3.19
Calcitic limestone	0.81	1.08	0.83	1.10	0.73	0.99
Salt	0.45	0.45	0.40	0.40	0.40	0.40
Mineral and vitamin supplement¹	0.40	0.40	0.40	0.40	0.40	0.40
DL-methionine	0.34	0.34	0.29	0.29	0.26	0.26
L-lysine	0.33	0.33	0.30	0.30	0.32	0.32
L-threonine	0.12	0.12	0.10	0.10	0.10	0.10
Total	100.00	100.00	100.00	100.00	100.00	100.00
Calculated nutritional composition
Metabolizable energy, kcal/kg	3,005	3,005	3,150	3,150	3,200	3,200
Crude protein, %	21.80	21.80	19.80	19.80	18.40	18.40
Calcium, %	0.88	0.78	0.76	0.66	0.66	0.56
Available phosphorus, %	0.44	0.29	0.35	0.20	0.31	0.16
Sodium, %	0.22	0.22	0.20	0.20	0.20	0.20
Sulfur amino acids, %	0.92	0.92	0.83	0.83	0.77	0.77
Digestible lysine, %	1.27	1.27	1.13	1.13	1.06	1.06
Digestible threonine, %	0.83	0.83	0.74	0.74	0.69	0.69
Digestible valine, %	0.88	0.88	0.80	0.80	0.74	0.74

				CV	SEM	P
	PC	NC	NC + phytase	%
Ashes (g/bird/d)	4.0	3.6	3.3	13.51	0.7	0.094
Calcium (mg/bird/d)	428	428	405	18.04	73	0.202
Phosphorus (mg/bird/d)	321^b	250^a	232^a	11.15	34	0.012

				CV	SEM	P
	PC	NC	NC + phytase	%
Ashes, %	31.13	26.63	34.38	7.63	2.28	0.166
Calcium, %	50.00^b	45.63^c	55.14^a	4.99	4.02	0.037
Phosphorus, %	54.38^b	52.00^b	59.29^a	5.17	2.92	0.006

	Treatments*				SEM	P
	PC	NC	NC + phytase	%
Average weight, g	3.224	3.145	3.176	2.58	165	0.632
Feed intake, g	4.858	5.052	4.846	2.21	518	0.675
Weight gain, g	3.176	3.096	3.126	2.65	165	0.631
Feed conversion ratio, g/g	1.53	1.63	1.55	1.88	0.12	0.388

	Treatments*			CV	SEM	P
	PC	NC	NC + phytase	%
Carcass, %	72.92	73.09	72.59	3.17	2.10	0.585
Breast, %	30.73	30.55	29.75	4.12	1.75	0.156
Leg, %	31.30	31.16	31.31	3.61	1.44	0.933

	Treatments*			CV	SEM	p
	PC	NC	NC + phytase	%
Ashes, %	53.59^a	50.41^c	52.39^b	3.94	1.00	<0.001
Calcium, %	20.72	19.90	20.02	5.18	1.17	0.333
Phosphorus, %	9.73^a	9.04^b	9.51^a	4.44	0.28	<0.001

Fundação de Apoio à Ciência e Tecnologia Avicolas Rua Barão de Paranapanema, 146 - Sala 72, Bloco A, Bosque, Campinas, SP - 13026-010. Tel.: 19 3255-8500 - Campinas - SP - Brazil
E-mail: revista@facta.org.br

Acompanhe os números deste periódico no seu leitor de RSS

[1] Corresponding author e-mail address Carlos TC de F Departamento de Nutrição e Produção Animal, FMVZ/USP - Campus Pirassununga E-mail: teresa_cristina_c@hotmail.com