Sealing strategies in corn silage and sheep performance in feedlots

Scheidt, Kácia Carine; Diaz, Tatiana Garcia; Machado, Juliana; Osmari, Milene Puntel; Daniel, João Luiz Pratti; Jobim, Clóves Cabreira

doi:10.1590/1809-6891v24e-74185E

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Animal science / Research article • Cienc. anim. bras. 24 • 2023 • https://doi.org/10.1590/1809-6891v24e-74185E copy

Sealing strategies in corn silage and sheep performance in feedlots

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

The objective of this study was to evaluate the effects of different sealing strategies on aerobic stability and feed value of corn silage supplied to finishing lambs. The treatments were set up according to the silo sealing strategy: BP (black polyethylene film), BP + Bagasse (black polyethylene film + sugarcane bagasse) and BP + Silostop (Silostop® Orange oxygen barrier film + black polyethylene film). Six lambs per treatment were used, totaling 18 animals in an experimental period of 63 days. The silage from LP treatment presented the highest aerobic stability, however with lower dry matter digestibility coefficients. No significant differences were detected among treatments for intake and performance of lambs. But for final body weight, weight gain, daily average gain, feed efficiency and dry matter intake, the best results, in absolute value, were found for lambs fed with silage from LP + Bagasse treatment. The silage sealed exclusively with black polyethylene film showed greater aerobic stability. The different sealing strategies used in this experiment did not influence the performance of finishing Dorper x Santa Inês lambs.

Keywords:
aerobic deterioration; carcass; digestibility; weight gain

Ingredient^* * CS–BP: corn silage sealed with 200-µm black polyethylene film; CS–BP + Bagasse: corn silage sealed with 200-µm black polyethylene canvas + sugarcane bagasse; CS–BP + Silostop: corn silage sealed with Silostop® Orange + 200-µm black polyethylene film; CSHMGS: rehydrated corn + soybean (20%) grain silage; CHMGS: rehydrated corn grain silage; MS: dry matter; MM: mineral matter; CP: crude protein; NDF: neutral detergent fiber; EE: ether extract; ADF: acid detergent fiber; NFC: non-fibrous carbohydrates; TDN: total digestible nutrients.	DM	MM	CP	NDF	EE	ADF	NFC	TDN
CS–BP	26.41	4.10	8.72	52.06	2.85	30.79	32.22	64.91
CS–BP + Bagasse	25.96	3.98	8.47	51.28	2.94	29.22	35.59	66.13
CS–BP + Silostop	26.43	4.22	8.11	51.76	3.17	29.57	35.00	65.86
CSHMGS	65.60	2.49	15.81	14.27	6.94	3.72	63.61	86.02
CHMGS	65.12	1.49	8.81	10.00	5.96	2.01	75.19	87.33

Diet^* * CS: corn silage; CSHMGS: rehydrated corn + soybean (20%) grain silage; CHMGS: rehydrated corn grain silage; DM: dry matter; NM: natural matter; MM: mineral matter; CP: crude protein; NDF: neutral detergent fiber; EE: ether extract; ADF: acid detergent fiber; NFC: non-fibrous carbohydrates; TDN: total digestible nutrients. 1Guarantee levels per kg of product: Na: 147.00 g; Ca: 120.00 g; P: 87.00 g; S: 18.00 g; Zn: 3800.00 mg; Fe: 1800.00 mg; Mn: 1300.00 mg; F: 870.00 mg; Cu: 590.00 mg; Mo: 300.00 mg; I: 80.00 mg; Co: 40.00 mg; Cr: 20.00 mg; Se: 15.00 mg. (% DM)	Silo sealing strategies
	BP	BP + Bagasse	BP + Silostop
CS	40.0	40.0	40.0
CSHMGS	42.51	42.51	42.51
CHMGS	14.17	14.17	14.17
¹Mineral supplement	3.32	3.32	3.32
Nutrients in the diets^* * CS: corn silage; CSHMGS: rehydrated corn + soybean (20%) grain silage; CHMGS: rehydrated corn grain silage; DM: dry matter; NM: natural matter; MM: mineral matter; CP: crude protein; NDF: neutral detergent fiber; EE: ether extract; ADF: acid detergent fiber; NFC: non-fibrous carbohydrates; TDN: total digestible nutrients. 1Guarantee levels per kg of product: Na: 147.00 g; Ca: 120.00 g; P: 87.00 g; S: 18.00 g; Zn: 3800.00 mg; Fe: 1800.00 mg; Mn: 1300.00 mg; F: 870.00 mg; Cu: 590.00 mg; Mo: 300.00 mg; I: 80.00 mg; Co: 40.00 mg; Cr: 20.00 mg; Se: 15.00 mg.
DM, % NM	47.7	47.5	47.7
MM, % DM	2.9	2.9	3.0
CP, % DM	11.5	11.4	11.2
NDF, % DM	28.3	28.0	28.2
EE, % DM	4.9	5.0	5.01
ADF,%DM	14.2	13.6	13.7

Variable	Silo sealing strategies			Mean	SEM^* * SEM: standard error of the mean. Different means on the same row differ from each other by Tukey’s test (α = 0.05).	P-value
Variable	BP	BP + Bagasse	BP + Silostop	Mean		P-value
N-NH₃ (%TN)	2.85^a	2.07^b	2.00^b	2.30	0.41	0.004
Lactic acid (% DM)	2.07^c	3.00^b	3.10^a	2.72	0.03	<0.001
AS (hours)	76.35^a	74.00^b	71.00^b	73.77	4.96	0.024
t °C max.	30.95^c	35.87^b	38.10^a	34.97	0.90	<0.001
Σ6d (°C)	10.67^c	23.07^b	27.25^a	10.88	1.26	<0.001

Variable^* * FBW: final body weight; WG: weight gain – 63 days; DAG: daily average gain; DMI: dry matter intake; FE: feed efficiency; HCY: hot carcass yield; CCY: cold carcass yield. SEM: standard error of the mean.	Silo sealing strategies			Mean	SEM	P-value
	BP	BP + Bagasse	BP + Silostop	Mean	SEM	P-value
FBW (kg)	34.31	36.56	36.18	35.68	6.97	0.328
WG (kg)	14.01	14.95	13.73	14.23	2.10	0.354
DAG (g/day)	242.00	263.00	246.00	251.00	0.83	0.490
FE	0.199	0.211	0.208	0.206	0.01	0.332
Intake (% LW)	3.22	3.28	3.12	3.20	0.07	0.626
HCY (%)	49.46	49.28	49.08	49.27	1.44	0.860
CCY (%)	49.06	48.56	48.00	48.63	1.78	0.605

Variable^* * DM: dry matter; OM: organic matter; NDF: neutral detergent fiber; CP: crude protein; EE: ether extract. SEM: standard error of the mean. Different means on the same row differ from each other by Tukey’s test (α = 0.05).	Silo sealing strategies			Mean	SEM	P-value
	BP	BP + Bagasse	BP + Silostop	Mean	SEM	P-value
Nutrient intake (g day^–1)
DM	1155	1262	1164	1193	0.01	0.267
OM	1124	1225	1132	1160	1.02	0.273
NDF	305	342	313	320	3.87	0.149
CP	139	148	136	141	1.35	0.545
EE	62	66	63	64	2.68	0.407
Nutrient digestibility coefficients (%)
DM	70.73^b	74.5^a	74.45^a	73.24	3.05	0.034
OM	73.70	76.77	76.63	75.70	2.58	0.060
NDF	36.56	44.82	43.30	41.56	1.82	0.083
CP	60.86	64.35	65.09	63.43	0.35	0.386

Universidade Federal de Goiás Universidade Federal de Goiás, Escola de Veterinária e Zootecnia, Campus II, Caixa Postal 131, CEP: 74001-970, Tel.: (55 62) 3521-1568, Fax: (55 62) 3521-1566 - Goiânia - GO - Brazil
E-mail: revistacab@gmail.com

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[1] *Corresponding author: kaciacarine_19@hotmail.com