Effect of different double-sided plastic films on chemical and fermentation characteristics of corn silage

Cristo, Fernando Braga; Neumann, Mikael; Sidor, Fernando de Souza; Seller, Maria Eduarda Cozechen; Plodoviski, Daniel Corrêa; Carneiro, Everton Luiz; Cesar, Paulo Victor Pinheiro; Savoldi, Leticia Santos; Costa, Luísa da

doi:10.1590/1809-6891v22e-66770

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Animal Science • Ciênc. anim. bras. 22 • 2021 • https://doi.org/10.1590/1809-6891v22e-66770 copy

Effect of different double-sided plastic films on chemical and fermentation characteristics of corn silage

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

The objective of this study was to evaluate the efficiency of different double-sided plastic films on chemical and fermentation characteristics, dry matter digestibility, aerobic stability, physical and dry matter losses in corn silages stored in bunker silos. This was a completely randomized experimental design consisting of three treatments: DF110µm - double-sided polyethylene with 110 µm thickness; DF200µm - double-sided polyethylene with 200 µm thickness; and DFBO - oxygen-impermeable film consisted of double-sided polyethylene with 80 µm thickness overlaid with a translucent vacuum polyamide film with 20 µm thickness. The use of DF200µm film increased the ruminal dry matter digestibility by 4.58% and reduced the silage temperature by 3.1 °C, as well as the physical losses of the corn silage were reduced by 118.9 g kg^-1 DM using DFBO and 95 g kg^-1 DM with DF200µm; DFBO resulted in the highest aerobic stability (127 hours) of corn silage. The use of DF200µm and DFBO is recommended for preserving corn silage in bunker silos.

Keywords:
Oxygen barrier; Dry matter digestibility; Aerobic stability; Dry matter losses; Polyamide

Parameter	Mean value
Green biomass production (kg ha^-1)	63,953
Dry biomass production (kg ha^-1)	23,944
First ear insertion height (m)	1.22
Plant height (m)	2.15
Number of dry leaves per plant	4.68
Dry matter content (g kg^-1):
Stalk	201.70
Leaves	307.30
Bracts	355.70
Cob	359.00
Grains	651.30
Whole plant	374.30
Grainless plant	262.10
Physical composition of the plant (g kg^-1):
Stalk	153.40
Leaves	255.80
Bracts	105.70
Cob	83.50
Grains	506.40

Parameter^* * DM: dry matter; MM: mineral matter; CP: crude protein; NDF: neutral detergent fiber; HEM: hemicellulose; ADF: acid detergent fiber; CEL: cellulose; LIG: lignin; DMI: dry matter intake; TDN: total digestible nutrients; RVF: relative value of food; DM Losses: dry matter losses. Means followed by different lowercase letters, in the same row, differ from each other by Tukey's Test (ρ < 0.05).	Plastic Films			Mean	P	SEM
	DF110µm	DF200µm	DFBO	Mean	P	SEM
DM (g kg^-1)	420.7 a	426.1 a	415.5 a	420.8	0.1291	0.1761
MM (g kg DM^-1)	23.1 a	23.2 a	24.0 a	23.4	0.6082	0.0393
CP (g kg DM^-1)	67.7 a	67.9 a	72.6 a	69.4	0.2060	0.1128
NDF (g kg DM^-1)	536.7 a	529.2 a	535.4 a	533.8	0.6100	0.3113
HEM (g kg DM^-1)	236.3 a	235.5 a	244.2 a	238.7	0.3546	0.2488
ADF (g kg DM^-1)	300.3 a	293.8 a	291.2 a	295.1	0.2710	0.2113
CEL (g kg DM^-1)	248.5 a	243.5 a	239.9 a	244.0	0.2067	0.1733
LIG (g kg DM^-1)	51.9 a	50.3 a	51.4 a	51.2	0.7767	0.0919
DMI (% BW)	2.24 a	2.27 a	2.24 a	2.25	0.5511	0.0124
TDN (g kg^-1)	668.2 a	672.8 a	674.5 a	671.8	0.2667	0.1590
RVF (% DM)	149.5 b	152.5 a	151.2 ab	151.1	0.0423	0.6499
DM Losses (% DM)	6.82 a	6.60 a	7.29 a	6.90	0.8961	0.4109

Parameter	Plastic Films			Mean	P	SEM
Parameter	DF110µm	DF200µm	DFBO	Mean	P	SEM
(g kg^-1 DM)
pH. (index)	4.12 a	4.04 b	4.02 b	4.06	0.0443	0.0148
Acetic acid	4.75 a	4.40 a	5.10 a	4.75	0.7225	0.2102
Propanoic acid	0.48 a	0.49 a	0.53 a	0.50	0.8450	0.0295
Ethanol	1.31 a	1.05 b	1.17 b	1.18	0.0416	0.0151

Period of Evaluation	Plastic Films			Mean
Period of Evaluation	DF110µm	DF200µm	DFBO	Mean
	Dry Matter (%)
0 to 28 days	44.09	43.99	43.83	43.97 A
29 to 56 days	43.36	44.15	42.58	43.36 A
57 to 84 days	44.13	44.64	42.27	43.68 A
Mean	43.86 a	44.26 a	42.89 b
	Silage Temperature (ºC)
0 a 28 days	23.24	19.11	21.22	21.19 B
29 to 56 days	24.59	20.48	22.16	22.41 B
57 to 84 days	26.20	24.98	26.11	25.76 A
Mean	24.68 a	21.52 b	23.16 ab
	Temperature gradient (ºC)
0 to 28 days	8.49	4.77	7.21	6.82 A
29 to 56 days	8.38	4.27	5.95	6.20 A
57 to 84 days	6.17	4.95	6.07	5.73 A
Mean	7.68 a	4.66 b	6.41 ab
	Physical dry matter losses (g kg^-1 DM)
0 to 28 days	195.6	45.9	41.2	94.2 B
29 to 56 days	195.6	59.8	111.0	122.1 A
57 to 84 days	179.9	108.8	134.3	141.0 A
Mean	190.4 a	71.5 b	95.4 b

Parameter	Plastic Films			Mean	P	SEM
Parameter	DF110µm	DF200µm	DFBO	Mean	P	SEM
TTmax. (h)	77.0 b	128.0 a	132.0 a	108.3	0.0024	5.0211
TpHmax. (h)	111.0 a	124.0 a	119.0 a	118.0	0.6405	5.6599
EST. (h)	99.0 b	105.0 ab	127.0 a	100.3	0.0468	3.9977
ESpH. (h)	159.0 a	128.0 b	156.0 ab	147.7	0.0262	4.2054

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] *Correspondent - fernandobragacristo@gmail.com