Effects of ensiling density on chemical and microbiological characteristics of sorghum silage

Anésio, Arnon Henrique Campos; Santos, Maurinho Luiz dos; Silva, Leandro Diego da; Silveira, Rodrigo Richard da; Braz, T.G.S.; Pereira, Radácia Cardoso

doi:10.22358/jafs/69270/2017

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…The reason for this might be that the microorganisms have greater activity in silage stored at NTs (20-30 • C) than at LTs (less than 10 • C) (Zhou et al, 2016;Jungbluth et al, 2017). Compared with NT-HD, the NT-LD contained less LA and WSC, but there was no difference in AA content (Tables 2, 3), which showed that there might be more residual oxygen and active aerobes consumed more WSC at the early period of fermentation (Sucu et al, 2016;Anésio et al, 2017).…”

Section: Materials Characteristics and Silage Qualitymentioning

confidence: 99%

Effect of Ensiling Density and Storage Temperature on Fermentation Quality, Bacterial Community, and Nitrate Concentration of Sorghum-Sudangrass Silage

et al. 2022

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This study aimed to evaluate the fermentation quality, bacterial community, and nitrate content of sorghum-sudangrass silage with two ensiling densities [550 kg fresh weight (FW)/m3 (low density, LD) and 650 kg FW/m3 (high density, HD)] stored at two temperatures [10°C (low temperature, LT) and 25°C (normal temperature, NT)] for 60 days. The fermentation parameters, microbial counts, bacterial community, nutritional composition, and nitrate and nitrite levels were assessed. The pH and ammonia nitrogen (N) in all silages were below 4.0 and 80 g/kg total N, respectively. Compared with LT treatments, NT treatments had lower pH and lactic acid (LA) bacteria and yeasts counts and contained higher LA and LA/acetic acid (LA/AA) (p < 0.05). The LT-LD contained more ammonia–N than LT-HD (p < 0.05) and had higher nitrate and lower nitrate degradation than other treatments (p < 0.05). Lactobacillus was the most dominant genus with all treatments (57.2–66.9%). The LA, LA/AA, and abundances of Pantoea, Pseudomonas, and Enterobacter in the silage negatively correlated with nitrate concentration and positively correlated with nitrate degradation (p < 0.05). Moreover, pH and ammonia–N were positively correlated with nitrate concentration and negatively correlated with nitrate degradation (p < 0.05). Overall, all silage had satisfactory fermentation quality, and the silage with HD and NT had better fermentation quality and higher nitrate degradation. The bacterial communities in all silages were dominated by Lactobacillus. The nitrate degradation during the fermentation process might be related to the fermentation quality and the activity of Pantoea, Pseudomonas, and Enterobacter in silage.

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Section: Materials Characteristics and Silage Qualitymentioning

confidence: 99%

Effect of Ensiling Density and Storage Temperature on Fermentation Quality, Bacterial Community, and Nitrate Concentration of Sorghum-Sudangrass Silage

et al. 2022

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“…Increasing ensiling density can minimize WSC loss due to plant respiration and aerobic microbial activity during the early stages of ensiling. This is mainly manifested in the elimination of residual oxygen by high density, which creates an anaerobic environment for LA fermentation and promotes a rapid decline in pH [18]. In addition, high density could prevent air infiltration, thereby inhibiting the proliferation of aerobic bacteria during aerobic exposure [2].…”

Section: Discussionmentioning

confidence: 99%

Fermentation Quality and Aerobic Stability Evaluation of Rice Straw Silage with Different Ensiling Densities

Liu,

Li,

et al. 2023

Fermentation

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Ensiling density has significant importance for the quality and preservation of silage. Appropriate ensiling density could improve the nutritional value, extend the storage time of silage and reduce the risk of mold and spoilage. This work aimed to evaluate the effect of ensiling densities on the fermentation quality and aerobic stability of rice straw. The rice straw was obtained after threshing, then chopped and ensiled into a 10 L laboratory silo with three ensiling densities (high density at 700 g/L, medium density at 600 g/L and low density at 500 g/L). Five silos per density were opened after 3, 5, 7, 14, 30 and 60 days of ensiling, and then, the fermentation quality and aerobic stability were analyzed. During ensiling, high density had the highest lactic acid content, and the lowest pH and ammonia nitrogen. There was no difference (p > 0.05) in the propionic acid, butyric acid and ethanol contents among all silage, and the contents of propionic acid and butyric acid were trace amounts. On day 60 of ensiling, the Flieg’s point of high density and medium density were higher than the low density. During aerobic exposure, the continuous lactic acid decrease and pH increase were observed in all silage. The aerobic bacteria and yeasts count in the high density and medium density were lower than that in the low density. The aerobic stability of the high density (26 h) and the medium density (24 h) were higher than that of the low density (13 h). It was suggested that if the ensiling density is higher than 600 g/L, it could effectively improve the fermentation quality and aerobic stability of rice straw.

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“…hinders the complete anaerobic stage of early fermentation and facilitates the growth of harmful microorganisms [9]. Additionally, a reduced stacking density can lead to a decrease in the recovery rate of dry matter (DM) and nutrient loss [10].…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Temperature and Density on Quality and Microbial Population of Alfalfa Silage

Liu,

Hao,

Zhao

et al. 2024

Preprint

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In this study, alfalfa silage with different packing densities (500 kg/m3, 600 kg/m3 and 700 kg/m3) were set up under outdoor high temperature and indoor normal temperature. The chemical composition, fermentation quality and microbial community of alfalfa silage were analyzed. The results showed that DM and WAC content decreased with the increase of density. When the density is 600kg/m3, CP content reaches the maximum and ADF content is the lowest. Temperature has a certain effect on alfalfa silage. The content of Lactobacillus plantarum fermented at high temperature is lower than that fermented at normal temperature. At the same time, the content of Lactobacillus plantarum decreased with the increase of packing density. However, the content of Lactobacillus plantarum was the lowest when the packing density was 600 kg/m3 at high temperature. In summary, this study explained the effects of different temperature and density on alfalfa fermentation quality and microbial community, and clarified that the density should be reasonably controlled within 600 kg/m3 during alfalfa silage, providing theoretical support for production practice.

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Effects of ensiling density on chemical and microbiological characteristics of sorghum silage

Cited by 7 publications

References 4 publications

Effect of Ensiling Density and Storage Temperature on Fermentation Quality, Bacterial Community, and Nitrate Concentration of Sorghum-Sudangrass Silage

Effect of Ensiling Density and Storage Temperature on Fermentation Quality, Bacterial Community, and Nitrate Concentration of Sorghum-Sudangrass Silage

Fermentation Quality and Aerobic Stability Evaluation of Rice Straw Silage with Different Ensiling Densities

Effects of Different Temperature and Density on Quality and Microbial Population of Alfalfa Silage

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