Nutrient and energy content, <i>in vitro</i>
 ruminal fermentation characteristics and methanogenic potential of alpine forage plant species during early summer

Jayanegara, Anuraga; Marquardt, Svenja; Kreuzer, Michael; Leiber, Florian

doi:10.1002/jsfa.4398

Cited by 36 publications

(40 citation statements)

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“…The increase in bacterial count was, however, found earlier with condensed tannin supplementation in vitro (Khiaosa-ard et al, 2009) and with herbal preparations studied in vivo (Bhatt et al, 2009). Therefore, no general anti-bacterial effect of the alpine pasture plants can be assumed, which is also in agreement with the results of Jayanegara et al (2011a). Also in the short-term perspective, based on the differences between the incubated forage types, no general influence of the TEP present in the alpine hay can be deducted.…”

Section: Discussionsupporting

confidence: 85%

“…The short-term incubation of alpine hay led to a lower methane production than that from lowland hay and the mixed silages. On the basis of the studies of Jayanegara et al (2011a and2011b), it can be assumed that total phenolic compounds at a concentration of , 20 g/kg in the alpine hay contributed at least partly to the decrease in methane production. Different from that, in the long-term perspective, there was no systematic effect of alpine grazing on methane formation and its proportion of total gas in vitro.…”

Section: Discussionmentioning

confidence: 99%

“…Leiber et al, 2006). Compared with lowland herbages, alpine pastures have a higher diversity in plant species, especially herbs, and are supposed to be richer in plant secondary compounds (PSC) than intensively managed lowland pastures (Jeangros et al, 1999;Jayanegara et al, 2011a). a Present address: Institute of Animal Science, University of Veterinary Medicine, Vienna, Austria.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, alpine pasture grass can be expected to modify ruminal fermentation in general, which could also affect methanogenesis. On the level of individual alpine plant species, a limited variation of methanogenesis has been demonstrated in vitro (Jayanegara et al, 2011a). However, it may well be that composed swards, which are a mixture of many, possibly interacting, plant species, have other effects than single species.…”

Section: Introductionmentioning

confidence: 99%

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Effects of species-diverse high-alpine forage on in vitro ruminal fermentation when used as donor cow's feed or directly incubated

Khiaosa‐ard

Soliva

Kreuzer

et al. 2012

Animal

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Alpine forages are assumed to have specific effects on ruminal digestion when fed to cattle. These effects were investigated in an experiment from two perspectives, either by using such forages as a substrate for incubation or as feed for a rumen fluid donor cow. In total, six 24-hin vitrobatch culture runs were performed. Rumen fluid was collected from a non-lactating donor cow after having grazed pastures at ∼2000 m above sea level for 2, 6 and 10 weeks. These ‘alpine runs’ were compared with three lowland samplings from before and 2 and 6 weeks after the alpine grazing where a silage–concentrate mix was fed. In each run, nine replicates of four forages each were incubated. These forages differed in type and origin (alpine hay, lowland ryegrass hay, grass–maize silage mix, pure hemicellulose) as well as in the content of nutrients. Concentrations of phenolic compounds in the incubated forages were (g/kg dry matter (DM)): 20 (tannin proportion: 0.47), 8 (0.27), 15 (0.52) and 0 (0), respectively. Crude protein was highest in the silage mix and lowest with hemicellulose, whereas the opposite was the case for fiber. The total phenol contents (g/kg DM) for the high altitude and the lowland diet of the donor cow were 27 (tannins: 0.50 of phenols) and 12 (0.27), respectively. Independent of the origin of the rumen fluid, the incubation with alpine hay decreased (P< 0.05) bacterial counts, fermentation gas amount, volatile fatty acid (VFA) production as well as ammonia and methane concentrations in fermentation gas (the latter two being not lower when compared with hemicellulose). Alpine grazing of the cow in turn increased (P< 0.001) bacterial counts and, to a lesser extent, acetate proportion compared with lowland feeding. Further, alpine grazing decreased protozoal count (P< 0.05) and VFA production (P< 0.001) to a small extent, whereas methane remained widely unchanged. There were interactions (P< 0.05) between forage type incubated and feeding period of the donor cow in protozoal counts, acetate:propionate ratio, fermentation gas production and its content of methane,in vitroorganic matter digestibility and metabolizable energy. Although increased phenolic compounds were the most consistent common property of the applied alpine forages, a clear attribution to certain effects was not possible in this study. As a further result, adaptation (long-term for donor cow, short term for 24 h incubations) appears to influence the expression of alpine forage effects in ruminal fermentation.

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Section: Discussionsupporting

confidence: 85%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of species-diverse high-alpine forage on in vitro ruminal fermentation when used as donor cow's feed or directly incubated

Khiaosa‐ard

Soliva

Kreuzer

et al. 2012

Animal

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“…Further research is required to examine the possible incorporation of forage legume species, either into mixed all-legume or grasslegume forage crops on the Tibetan plateau (Zhang et al 2006b;Li et al 2010), especially at altitudes above 4000 m. Thus, a practicable approach of combining restoration of degraded grassland with establishment of cultivated pastures to improve management techniques for sustaining large areas for conservation and grazing is required. Already, in other alpine regions of the world, high quality forages are being successfully harvested from permanent grasslands (Marini et al 2008;Jayanegara et al 2011), as a result of careful management by controlling mowing frequencies and stocking density.…”

Section: Establishing Large Areas For Production Of Sown Forage (B)mentioning

confidence: 99%

The sustainable development of grassland-livestock systems on the Tibetan plateau: problems, strategies and prospects

Gibb²,

et al. 2014

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Abstract. The Tibetan plateau is the source of most of the major rivers of Asia and has a huge impact on the livelihoods of the population, who have for centuries engaged in traditional herding practices. Sustainable management of the plateau is of critical importance not only for maintaining livelihoods but also because of its vital ecological function. The major problem of sustainable development in these grassland-livestock systems is the conflict between forage and livestock production. Despite considerable investment of manpower, material resources and capital over many years, attempts to resolve the problem have not been successful. The magnitude of conflict between forage and livestock is addressed by presenting 19 resolution strategies based on numerous research data. Each of these strategies is evaluated in terms of how it can be implemented, its potential benefits for livestock production, current progress and the requirement for further research. The 19 strategies have been divided into four topic categories, namely; grassland-forage, livestock, economy and market, societyculture, which cover the basic elements of sustainable development in this pastoral region. It is argued that improved planning and implementation of the proposed strategies must be based on the background investigation of natural and social status of the pastoral region. Particular attention needs to be given to genetic resources and technology in order to ensure the successful implementation of these proposals. In addition to expanding the use of 18 currently practiced strategies, the authors propose a further novel strategy of replacing the current intensive form of ecological migration with a model incorporating two semipermanent settlements. The objective of this novel strategy is to retain the nomadic element of pastoral husbandry while increasing the temporal and spatial scale of rotational stocking to reduce pasture degradation on the Tibetan plateau. It is argued that these proposals should be urgently incorporated into two national plans for the pastoral livestock industry, and the construction of an ecologically safe shelter zone on the Tibetan plateau, while ensuring a sustainable livelihood of its pastoral residents. Ensuring a successful implementation of these strategies in resolving the conflict between grassland and livestock, and promoting sustainable development on the Tibetan plateau, requires willing support at the level of national investment and policy commitment and from the herdsmen.

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Influence of Fermentation and Germination on Food Bioactives

Ansari

Pourjafar

2022

Food Bioactive Ingredients

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Nutrient and energy content, in vitro ruminal fermentation characteristics and methanogenic potential of alpine forage plant species during early summer

Abstract: Variation in methane production potential across the investigated forages was small. The two goals of limited methane production potential and high nutritive value for ruminants were met best by A. xanthochlora and S. nigra.

Cited by 36 publications

References 36 publications

Effects of species-diverse high-alpine forage on in vitro ruminal fermentation when used as donor cow's feed or directly incubated

Effects of species-diverse high-alpine forage on in vitro ruminal fermentation when used as donor cow's feed or directly incubated

The sustainable development of grassland-livestock systems on the Tibetan plateau: problems, strategies and prospects

Influence of Fermentation and Germination on Food Bioactives

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