Effect of the seal type in corn silage on steer performance
DOI:
https://doi.org/10.5433/1679-0359.2024v45n5p1521Keywords:
Dry matter digestibility, Feed efficiency, Weight gain.Abstract
Silage making involves several steps that require specific materials to minimize contact between the ensiled material and the external environment. This is because the removal of oxygen and the sealing of the material are directly related to the integrity of the process. The research was conducted at the Animal Production Center (NUPRAN) of the Midwestern Paraná State University (UNICENTRO) in Guarapuava, Paraná State, Brazil, aiming to evaluate the effect of sealing corn silage silos on losses and nutritional value of forage and supplying this silage on the performance, dry matter intake, apparent digestibility, and ingestive behavior of feedlot finished steers. The diets consisted of 35% corn silage and 65% concentrate on a dry matter basis. The feeding period lasted 112 days, with 28 days of adaptation and 84 days of evaluation divided into 3 periods of 28 days each. Thirty-six ½ Angus Nellore steers, intact males, with an average initial weight of 401 kg and an average age of 12 months were used. The experimental design was a randomized complete block design, consisting of three treatments with six repetitions, in which each pen with two animals represented an experimental unit: T1 - LDPE90 (double-sided tarpaulin with 3 layers of low-density polyethylene, 90 µm thickness); T2 - LDPE200 (double-sided tarpaulin with 3 layers of low-density polyethylene, 200 µm thickness); and T3 - LDPE/HDPE (silver tarpaulin with 1 layer of low-density polyethylene cross-laminated with high-density polyethylene in x-shape between the polymers, 150 µm thickness). The use of LDPE200 for sealing corn silage silos resulted in reduced losses, increased aerobic stability, and increased ruminal digestibility of DM compared to other types of polyethylene. Feedlot-finished beef steers fed corn silage from LDPE200-sealed trench silos showed higher average daily gain (1.509 kg day-1 ), apparent digestibility of dry matter (63.39%), and improved efficiency of converting ingested DM into carcass (10.79 DCG DMI-1 ) compared to LDPE/HDPE and LDPE90. The LDPE200 polyethylene is the most suitable for sealing corn silage silos due to its ability to provide greater stability of the ensiled mass, reduce losses, increase ruminal degradability of DM, and improve the feedlot finished steer performance.
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Copyright (c) 2024 Mikael Neumann, Ellen Baldissera, Livia Alessi Ienke, João Antonio de Arruda Giacomet, Adriel Marcelo Schlindwein, Valéria Kalinovski, Everton Luiz Carneiro Pereira, Bruno José Venancio, Valter Harry Bumbieris Junior
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