Aerobic exposure of lucerne silages and its impact on preference and dry matter intake by goats

Gerlach, Katrin; Liao, Yuan-Mei; Südekum, Karl‐Heinz

doi:10.1016/j.smallrumres.2014.07.022

Cited by 9 publications

(7 citation statements)

References 23 publications

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“…The CL decreased after day 4 and can be explained by oxidation processes in the fatty acids, as described by Khan, Cone, and Hendriks (2009), which caused a loss of ME. The NPN fraction decreased after day 2 of exposure, which was inconsistent with the results of Gerlach, Liao, and S€ udekum (2014), who observed no changes in NPN when lucerne silages were exposed to air for 8 days. These silages, however, remained aerobically stable for 8 days.…”

Section: Treatment Effects On Chemical Compositioncontrasting

confidence: 96%

Effect of compaction, delayed sealing and aerobic exposure on maize silage quality and on formation of volatile organic compounds

Brüning

Gerlach

Weiß

et al. 2017

Grass and Forage Science

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Physical and management factors, such as compaction and sealing, greatly influence the outcome of forage conservation. This study aimed to determine the effects of compaction, delayed sealing and aerobic exposure after ensiling on maize silage quality and on formation of volatile organic compounds. Whole‐crop maize (277 g/kg dry matter [DM]) in 120‐L plastic silos was compacted at either high or low density, and sealed immediately or with delay at 2 days or 4 days post‐filling (six replicates each). After ensiling for at least 175 days, the silages were exposed to air for 6‐day intervals and sampled at 2‐day intervals. A delay in sealing caused an increase in yeast counts and a decline of up to 65% in water‐soluble carbohydrates before ensiling. Sealing the silos after 4 days caused DM losses of up to 11%. Delayed sealing promoted the formation of ethyl esters at silo opening. A 4‐day delay in sealing resulted in the lowest aerobic stability. Aerobic exposure led to considerable changes in silage composition, a loss in feed value and, finally, spoilage. This study indicates that maize silage quality is adversely affected by low compaction, delayed sealing and aerobic exposure.

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Section: Treatment Effects On Chemical Compositioncontrasting

confidence: 96%

Effect of compaction, delayed sealing and aerobic exposure on maize silage quality and on formation of volatile organic compounds

Brüning

Gerlach

Weiß

et al. 2017

Grass and Forage Science

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“…The same authors reported aerobic exposure of alfalfa and grass silages also strongly influenced preference and short-time DMI by goats, although silage temperature and fermentation products changed only slightly during aerobic exposure (Gerlach et al, 2014a,b). Pooling data from these 3 experiments (Gerlach et al, 2013(Gerlach et al, , 2014a, a negative relationship between mold count of the offered forage and DMI by goats can be observed (Figure 7). (Hoffman and Ocker, 1997, modified).…”

Section: Aerobic Deteriorationmentioning

confidence: 96%

Silage review: Factors affecting dry matter and quality losses in silages

Borreani

Tabacco

Schmidt³

et al. 2018

Journal of Dairy Science

525

397

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An overview was made of dry matter (DM) and quality losses that occur during the ensiling process from the field through the feeding phase. The aim was to review the relevant published literature of the last 15 yr focusing on developments achieved after the publication of the book Silage Science and Technology. This review discusses the factors affecting DM and quality losses in terms of field and pre-ensiling conditions, respiration and temperature at ensiling, fermentation patterns, methods of covering and weighting the silage cover, and management of aerobic deterioration. The possibility of reducing DM and quality losses during the ensiling process requires knowledge of how to measure losses on farm and establish the status of the silage during the feed-out phase, implementing the most effective management practices to avoid air exposure during conservation and reduce silage aerobic deterioration during feeding. The paper concludes with future perspectives and recommended management practices to reduce losses and increase efficiency over the whole ensiling process in view of increasing sustainability of the livestock production chain.

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“…As extensively reviewed by Muck, an uncorrected silo management, including but not limited to inadequate DM content of crop at harvest, slow silo filling, imperfect mass sealing, poor mass compression, delay in mass pH drop, air penetration in ensiled mass or inappropriate unloading equipment and techniques, could compromise any of these ensiling phases, thus exposing corn silage to risk of air penetration . In particular, aerobic deterioration could cause nutrient and DM losses, heat damage of nutrients, proteolysis, proliferation of undesirable microorganisms, such as mycotoxigenic fungi, and production of their toxins . Furthermore, the negative effects due to aerobic activity could be more serious in specific areas of silage, especially in the lateral and apical parts of ensiled crop, which are generally packed and sealed with difficulty …”

Section: Introductionmentioning

confidence: 99%

“…Several experiments have been carried out to characterize either silage conservation methods or their end‐product composition and to study effects of chemical or digestibility parameters and fermentation traits on silage DMI. Some of aforementioned research studies characterized grass, lucerne or corn silages. Among these, Gerlach et al recently carried out an experiment in which goats were fed corn silages differing for DM content, chopping length, compaction pressure and lengths of silage aerobic exposure, reporting the mass temperature (expressed as difference from ambient temperature, d T ) was the best predictor for DMI compared to other corn silage single traits.…”

Section: Introductionmentioning

confidence: 99%

New assessment based on the use of principal factor analysis to investigate corn silage quality from nutritional traits, fermentation end products and mycotoxins

et al. 2015

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Aerobic exposure of lucerne silages and its impact on preference and dry matter intake by goats

Cited by 9 publications

References 23 publications

Effect of compaction, delayed sealing and aerobic exposure on maize silage quality and on formation of volatile organic compounds

Effect of compaction, delayed sealing and aerobic exposure on maize silage quality and on formation of volatile organic compounds

Silage review: Factors affecting dry matter and quality losses in silages

New assessment based on the use of principal factor analysis to investigate corn silage quality from nutritional traits, fermentation end products and mycotoxins

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