The food habits of goats on rangelands with different amounts of fourwing saltbush (Atriplex canescens) cover

Mellado, M.; Rodríguez, A.; Lozano, E.A.; Dueñez, J.; Aguilar, Cristóbal N.; Arévalo, José Ramón

doi:10.1016/j.jaridenv.2012.03.012

Cited by 21 publications

(17 citation statements)

References 37 publications

(45 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A lot of methods have been used until now to evaluate ruminant diet selection under grazing systems [e.g., faecal analysis, esophageal fistulation (Papachristou and Nastis, 1993;Henley et al, 2006;Mellado et al, 2012), direct observation of grazing animals (Dumont and Boissy, 2000;Foroughbakhch et al, 2013;Mancilla-Leytón et al, 2013) and direct estimation of grazing damage of each species (Hejcman et al, 2008;Nagaike, 2012)]. However, in the current study the BR percentage of the whole flock on the half-long term was evaluated fitting the method proposed by Nagaike (2012) to the vertical point-quadrat method.…”

Section: Vegetation Surveys Browsing Ratio and Species Intake Assessmentioning

confidence: 97%

Browsing ratio, species intake, and milk fatty acid composition of goats foraging on alpine open grassland and grazable forestland

Iussig

Renna

Gorlier

et al. 2015

Small Ruminant Research

View full text Add to dashboard Cite

Aims of this study were to investigate diet selection of dairy goats foraging on two alpine vegetation types and to assess the related effects on milk fatty acid (FA) composition. Two enclosures laid out on an open grassland (OG) and a grazable forestland (GF) were exploited by 14 Camosciata goats. A commercial concentrate was supplemented during milking. Forty-five plots were randomly selected inside each enclosure and used to assess the species relative abundance (SRA) and phenological stage of plants, as well as goats' preferences (browsing ratio, BR) and intake (SI) for each species.Representative samples of the diet in each enclosure were built up considering the most ingested plant species and plant parts. Feed samples were analyzed for proximate, FA, and phenolic compositions.Milk samples were collected in each enclosure and analyzed for their FA profile. The enclosures showed a similar level of vegetation diversity. If compared to the GF enclosure, the OG one had higher proportion of Poaceae (81.2 vs 44.8% of SRA) and lower proportion of non-legume dicotyledons (14.6 vs 50.7% of SRA). The goats mostly selected eutrophic species in OG and forbs and woody species leaves in GF. The ingested vegetation was almost completely represented by grasses in OG (89.6% of SI), and by similar proportions of grasses and herbs and woody species in GF (54.9 and 45.1% of SI, respectively). The ingested forages from the OG and GF showed a comparable proximate composition; if compared to OG, the GF vegetation type was however richer in α-linolenic acid (ALA) and phenolic compounds (PC). Fatty acid analysis showed that GF milk had higher concentrations of ALA, total omega-3 FA, total trans-octadecadienoic acids, total conjugated linoleic acids, total trans-octadecenoic acids, and a reduced omega-6/omega-3 FA ratio than OG milk.Branched-chain FA were not significantly affected by treatment, suggesting that the activity of ruminal bacteria in the goats was not inhibited by the higher concentration of PC in GF plants. The main reason for the observed improvement of the FA profile in GF milk seems to be attributable to the FA profile rather than the concentration and composition of PC of the ingested plants. The abundance of herbs and woody species in the ingested vegetation was positively associated with the presence of nutritionally desirable FA in goat milk fat.

show abstract

Section: Vegetation Surveys Browsing Ratio and Species Intake Assessmentioning

confidence: 97%

Browsing ratio, species intake, and milk fatty acid composition of goats foraging on alpine open grassland and grazable forestland

Iussig

Renna

Gorlier

et al. 2015

Small Ruminant Research

View full text Add to dashboard Cite

show abstract

“…Pickup [31] discussed the role of climate on rangeland forage production. e effect of grazing and trampling on forage productivity has also received some attention [32]. Further, others have focused on the attendant effects of land use [33] and associated practices such as grazing [34], fire, and cultivation on soil properties in the rangelands [28].…”

Section: Introductionmentioning

confidence: 99%

Land Cover and Soil Properties Influence on Forage Quantity in a Semiarid Region in East Africa

Egeru

Wasonga

Gabiri

et al. 2019

Applied and Environmental Soil Science

View full text Add to dashboard Cite

Soil properties contribute to the widely recognised resilience of semiarid areas. However, limited attention has been given in providing a scientific basis of how semiarid soil properties in the various land covers occur and how they influence forage quantity.is study investigated the influence of different soil properties and land cover types on herbaceous biomass quantity in the Karamoja subregion of Uganda. A completely randomized design in three land cover types (thickets and shrublands, woodlands, and savannah grasslands) was implemented. In each vegetation type, 50 × 40 m plots were demarcated with nested plots to facilitate clipping of the herbaceous layer. Composite soil samples at two depths (0-15 cm, 15-30 cm) were obtained from each plot. e results showed that soil properties varied across land cover types. Soil pH ranged between 6.9 and 8.1 and SOM, N, P, and K were generally low in all land cover types. Soil hydraulic properties revealed the existence of rapid to very rapid permeability in thickets/shrublands, grasslands, and woodlands. Percent change in soil properties (0-15 cm to 15-30 cm) was highest in P, Ca, Mg, Na, and SOM. In the grasslands, P positively (p ≤ 0.01) influenced herbaceous biomass, whereas pH, K, Na, % sand, and % clay, N, and SOM had a negative relationship with herbaceous biomass (p ≤ 0.05). Herbaceous biomass in the thickets/shrublands was negatively influenced by P, Ca, and Mg and % clay and positively by N and % silt (p ≤ 0.05). Only N and SOM were significant determinants of herbaceous biomass in the woodlands (p ≤ 0.05). e low level of soil nutrients observed in this study reveals the fragility of semiarid soils, indicating the need for sustainable landscape management.

show abstract

“…El comportamiento se atribuye al incremento de la disponibilidad de materia verde en la época de lluvias, por lo que los animales consumen suficiente alimento para satisfacer sus necesidades en menor tiempo, mientras que en la época de seca, debido a la escasez de biomasa de la gramínea, requieren más tiempo para obtener el alimento. Mellado et al (2012) por su parte, llegaron a reportar un consumo 4,5 veces superior en cabras que pastorearon áreas con cobertura de 46,2% de Atriplex canescens en comparación con cabras que pastaron áreas con 14,6% de cobertura del arbusto.…”

Section: Componente Leucaena (Leucaena Leucocephala)unclassified

Disponibilidad de biomasa y hábitos alimenticios de ovinos en un sistema silvopastoril con <i>Leucaena leucocephala, Hibiscus rosa-sinensis y Cynodon nlemfuensis</i>

Candelaria-Martínez¹,

Rivera-Lorca²,

Flota-Bañuelos

2017

RAC

View full text Add to dashboard Cite

Se evaluó el efecto del pastoreo a los 50, 60 y 70 días en época de lluvias y seca con nortes que son los frentes fríos, que corresponden de octubre a enero junto con la disponibilidad, calidad de biomasa y hábitos alimenticios de ovinos en un sistema silvopastoril de pasto estrella (Cynodon nlemfuensis), tulipán (Hibiscus rosasinensis) y leucaena (Leucaena leucocephala). Para cada tratamiento se utilizaron 2 parcelas de 8x24 m y 6 ovejas adultas raza pelibuey. La disponibilidad de biomasa en leucaena y tulipán se evaluó mediante cosecha total de 20 a 40 plantas por tratamiento. El pasto estrella se midió antes y después del pastoreo. Las 3 especies se separaron en componentes morfológicos, y se determinó proteína cruda y fibra detergente neutra en las hojas. Los hábitos de los ovinos se determinaron mediante observación directa. La disponibilidad de biomasa total, consumo por grupo y utilización días y en la época de lluvias. La proporción de hoja de las 3 especies fue mayor a los 50 días; por efecto de la época, fue más abundante en lluvias, nortes y seca para estrella, leucaena y tulipán, respectivamente. La disponibilidad de PC no varió (p>0,05) por efecto de frecuencia ni época de pastoreo. El mayor tiempo de consumo estuvo destinado a pasto estrella, tulipán y leucaena. Los diseños favorecieron los sistemas silvopastoriles multiasociados pues potenciaron los efectos positivos de sus relaciones. Las frecuencias de pastoreo se ajustaron a la época del año, bajo un modelo de manejo mixto de pastoreo y podas, para mejor utilización de la biomasa.

show abstract

The food habits of goats on rangelands with different amounts of fourwing saltbush (Atriplex canescens) cover

Cited by 21 publications

References 37 publications

Browsing ratio, species intake, and milk fatty acid composition of goats foraging on alpine open grassland and grazable forestland

Browsing ratio, species intake, and milk fatty acid composition of goats foraging on alpine open grassland and grazable forestland

Land Cover and Soil Properties Influence on Forage Quantity in a Semiarid Region in East Africa

Disponibilidad de biomasa y hábitos alimenticios de ovinos en un sistema silvopastoril con <i>Leucaena leucocephala, Hibiscus rosa-sinensis y Cynodon nlemfuensis</i>

Contact Info

Product

Resources

About