Diet mixing and condensed tannins help explain foraging preferences by Creole goats facing the physical and chemical diversity of native woody plants in the central Monte desert (Argentina)

Egea, A.V.; Allegretti, L.; Lama, Soni; Grilli, Diego; Fucili, M.; Guevara, Juan Carlos; Villalba, Juan J.

doi:10.1016/j.anifeedsci.2016.02.021

Cited by 16 publications

(10 citation statements)

References 65 publications

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“…Values of DD estimated during the wet season were similar to those reported by Egea et al. (), who estimated the DD in cafeteria trials where Creole goats were fed ad libitum amounts of five of the main forage species that goats consume when grazing in the study area. Seasonal change in DD of grazing goats has also been reported by Narvaez et al.…”

Section: Discussionsupporting

confidence: 85%

“…These results can be explained by the reduced availability of herbaceous biomass in the dry season (Egea et al, 2014) and the higher CP content and lower tannin content in summer diets. Values of DD estimated during the wet season were similar to those reported by Egea et al (2016), who estimated the DD in cafeteria trials where Creole goats were fed ad libitum amounts of five of the main forage species that goats consume when grazing in the study area. Seasonal change in DD of grazing goats has also been reported by Narvaez et al…”

Section: Effect Of Season and Physiological State On Diet Botanicalsupporting

confidence: 83%

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Seasonal changes in feed intake, diet digestibility and diet composition by lactating and non‐lactating goats browsing in a semi‐arid rangeland of Argentina

Egea

Bakker

Allegretti

et al. 2018

Grass and Forage Science

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We determined the seasonal nutrient and secondary compound intake, in vivo diet digestibility (DD) and diet species composition of goats in different physiological states in a desert rangeland of Argentina. During the wet and the dry seasons, 24 mature female Creole goats (six non‐lactating, non‐pregnant and six lactating in each season) were used in a 2 × 2 factorial design. Diet botanical composition, DD and dry‐matter intake (DMI) were estimated by the combined use of visual observation, microhistological analyses of faecal samples and n‐alkane technique. Browse species dominated the goats’ diets (>80%) in both seasons and physiological states, with a twofold increase in the proportion of forbs during the wet season (p < 0.10). Lactating goats showed greater DMI than non‐lactating animals, and they also displayed greater intakes of some tanniferous (Mimosa ephedroides) and high‐protein (Atriplex lampa) shrubs (p < 0.10). Lactating and non‐lactating goats selected diets with adequate crude protein (CP) and fibre content but insufficient energy, although lactating goats tended to increase energy and tannin content in their diets (p < 0.20). Physiological state did not influence DD, but digestibility was greater (p < 0.10) in the wet season, attributed to the greater protein content and lower tannin content of the diet. These results have important implications for managerial interventions on traditional goat production systems in the study area aiming at enhancing goat nutrition and welfare, as well as the sustainability of rangeland resources in the region.

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Section: Discussionsupporting

confidence: 85%

Section: Effect Of Season and Physiological State On Diet Botanicalsupporting

confidence: 83%

Seasonal changes in feed intake, diet digestibility and diet composition by lactating and non‐lactating goats browsing in a semi‐arid rangeland of Argentina

Egea

Bakker

Allegretti

et al. 2018

Grass and Forage Science

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“…The decline in nitrogen retention of animals fed tree legumes mixture vs. alfalfa hay might be due to the lack of soluble nitrogen or low digestibility in the basal diets and high tannins concentrations in browse species have been associated with reduced nitrogen retention [53,54]. Conversely, diets high in condensed tannins can also increase post-ruminal absorption of nitrogen [55], decrease in fecal nitrogen excretion [56] and increase N retention [57].…”

Section: Nitrogen Utilizationmentioning

confidence: 99%

Comparative nutritional studies of sheep and goats fed cultivated tree legumes mixture under desert condition

2018

Am.-Eursion j. sustain. Agric.

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This research was performed to compare the nutritional studies of Barki sheep and doe Shami goats fed on mixture of forage tree legumes and its effects on feed intake, nutrient digestibility, nutritive value, nitrogen utilization, body weight change, some parameters of rumen and blood. Our study was carried out at South Sinai Research Station (Ras Suder), South Sinai Governorate, Egypt. Thirty-six pregnant Barki sheep and Shami goats were randomly allocated into two equal groups (18 animals each specie). The first group (G1) of each species fed alfalfa with concentrate diet and served as control. The second group (G2) fed ad libtum sun-dried chopped mixture contained 50% Acacia saligna, 25% Prosopis juliflora and 25% Leucaena leucocephala with concentrate diet. Results indicated that overall roughage and total DM intake (g/Kg W 0.75 /d) were similar between both species but animals fed G2 showed lower (P<0.05) in roughage and total DM intake than those fed G1. The results also showed that goats had higher (P<0.05) overall dry matter (DM), crud protein (CP) and crud fiber (CF) digestibility than sheep but overall nitrogen intake (NI) was similar between both species and was higher (P<0.05) for animals fed G1 vs. those fed G2. Also, nitrogen balance was similar between both species and was insignificant higher for those fed G1 vs. G2. Goats had higher (P<0.05) overall ammonia NH3-N than sheep but sheep had higher (P<0.05) overall ruminal TVFA´s than goats as well as animals fed G2 showed lower (P<0.05) NH3-N and TVFA´s than those fed G1. Values of body weight change (kg) and relative body weight (%) of end pregnancy were insignificant between both species and feeding treatments. Sheep had slightly insignificant lower concentrations of overall total protein and globulin than goats and was also slightly insignificant higher concentrations of overall urea and creatinine than goats while goats recorded insignificant higher values of overall AST and ALT than sheep. It was concluded feed utilization of tree legumes mixture as animal feeds in saline affected and soils could be an appropriate option for alleviating the desertification difficulties and provide alternatives as good feed resources especially in droughts when the other traditional food resources are shortage.

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“…The challenge ahead entails the design of diverse agricultural pastures by selecting species identities from a wider array of forage options, exploring "non-traditional" forage species like cicer milkvetch (Astragalus cicer L.), small burnet (Sanguisorba minor), hairy vetch (Vicia villosa Roth), forage radish (Raphanus sativus L.), safflower (Carthamus tinctorius) (Meccage et al, 2019;Stewart et al, 2019;Roca-Fernández et al, 2020) and shrubs like saltbrush (Atriplex spp.) (Pearce et al, 2010), Leucaena leucocephala, Guazuma ulmifolia (Casanova-Lugo et al, 2014, or Tricomaria usillo, and Mimosa ephedroides (Egea et al, 2016). Even if these species represent a small component of the diet, the provision of plant bioactives or other nutrients (i.e., vitamins, minerals, aromas) to the internal environment may represent a significant contribution to the nutrition, welfare, and health of the animal.…”

Section: Discussionmentioning

confidence: 99%

“…In another study, sheep offered a free choice of three legume species, differing in nutrient and PSMs content, showed enhanced intake and diet digestibility relative to feeding single species . Goats fed a free choice of five shrub species selected a mixed diet of greater digestibility than controls fed the single shrub species (Egea et al, 2016).…”

Section: Diverse Diets: Nutrient Intakementioning

confidence: 99%

Designing Diverse Agricultural Pastures for Improving Ruminant Production Systems

Distel

Arroquy

Lagrange

et al. 2020

Front. Sustain. Food Syst.

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Pasture-based production systems represent a significant sustainable supplier of animal source foods worldwide. For such systems, mounting evidence highlights the importance of plant diversity on the proper functioning of soils, plants and animals. A diversity of forages and biochemicals -primary and secondary compounds-at appropriate doses and sequences of ingestion, may lead to benefits to the animal and their environment that are greater than grazing monocultures and the isolated effects of single chemicals.Here we review the importance of plant and phytochemical diversity on animal nutrition, welfare, health, and environmental impact while exploring some novel ideas about pasture design and management based on the biochemical complexity of traditional and non-traditional forage sources. Such effort will require an integration and synthesis on the morphology, ecophysiology, and biochemistry of traditional and non-traditional forage species, as well as on the foraging behavior of livestock grazing diverse pasturelands. Thus, the challenge ahead entails selecting the "right" species combination, spatial aggregation, distribution and management of the forage resource such that productivity and stability of plant communities and ecological services provided by grazing are enhanced. We conclude that there is strong experimental support for replacing simple traditional agricultural pastures of reduced phytochemical diversity with multiple arrays of complementary forage species that enable ruminants to select a diet in benefit of their nutrition, health and welfare, whilst reducing the negative environmental impacts caused by livestock production systems.

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Diet mixing and condensed tannins help explain foraging preferences by Creole goats facing the physical and chemical diversity of native woody plants in the central Monte desert (Argentina)

Cited by 16 publications

References 65 publications

Seasonal changes in feed intake, diet digestibility and diet composition by lactating and non‐lactating goats browsing in a semi‐arid rangeland of Argentina

Seasonal changes in feed intake, diet digestibility and diet composition by lactating and non‐lactating goats browsing in a semi‐arid rangeland of Argentina

Comparative nutritional studies of sheep and goats fed cultivated tree legumes mixture under desert condition

Designing Diverse Agricultural Pastures for Improving Ruminant Production Systems

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