Effects of co-grazing dairy heifers with goats on animal performance, dry matter yield, and pasture forage composition1

Dennis, T.S.; Unruh-Snyder, L.; Neary, M.K.; Nennich, T.D.

doi:10.2527/jas.2011-4643

Cited by 11 publications

(5 citation statements)

References 35 publications

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“…The large difference for the cattle-alone treatment was due to their near total avoidance of blackberry. This is similar to the findings of Dennis et al (2012), who noted a substantially higher presence of weeds in cattle-only pastures than in mixed cattle-and-goat pastures after being grazed for 2 yr.…”

Section: Treatmentsupporting

confidence: 89%

Mixed Stocking by Cattle and Goats for Blackberry Control in Rhizoma Peanut–Grass Pastures

et al. 2014

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Blackberry (Rubus fruticosas L.) can be a weed in rhizoma peanut (Arachis glabrata Benth.)–grass pastures. Goats (Capra hircus) have provided effective control of Rubus spp. in other environments, but their efficacy has not been tested in legume‐grass swards in this context. The objective was to evaluate rotational stocking by goats alone or with cattle (Bos spp.) for blackberry control. Treatments stocked at 2.6 animal units (AU) ha−1 included a cattle‐alone control, goats alone, concurrent stocking of cattle and goats, sequential stocking of cattle followed by goats, and sequential stocking of goats followed by cattle. The final treatment was concurrent stocking at a stocking rate of 3.5 AU ha−1. Goats grazed blackberry readily, but cattle avoided it. Blackberry selection was greatest when goats followed cattle sequentially. The blackberry proportion of total biomass increased 10% when cattle grazed alone but was reduced 11% with goats alone and 13% with mixed concurrent grazing at a high stocking rate. Treatments including goats resulted in reductions or smaller increases in blackberry mass than for cattle alone. Goats alone or with cattle resulted in greater removal of blackberry leaf and in reduced height and stem density than cattle alone. Goats reduced the blackberry contribution more than cattle, but it was not eliminated from initially heavily infested pastures across 2 yr of grazing. A greater goat stocking rate or a combination of grazing and mowing may be needed for complete eradication.

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Section: Treatmentsupporting

confidence: 89%

Mixed Stocking by Cattle and Goats for Blackberry Control in Rhizoma Peanut–Grass Pastures

et al. 2014

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“…Therefore, the partial slaughter traits of Taihang black goats increase with age. The live weight of Taihang black goats slaughtered at the age of 2 was lower than that of goats (39.2 kg at the age of 2) reported by Dennis et al [15] in a grazing system. However, Hozza et al [16] reported lower live weights (mean of 18.57 kg) in crossbred goats that received different concentrate supplements and were slaughtered at the age of 21 months.…”

Section: Carcass Characteristicscontrasting

confidence: 61%

Evaluation of carcass traits, meat quality and the expression of lipid metabolism-related genes in different slaughter ages and muscles of Taihang black goats

Cai,

Wang,

et al. 2024

Anim Biosci

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Objective: This study was conducted to investigate the effect of slaughter age on carcass traits, meat quality, and the relative mRNA levels of lipid metabolism-related genes in different muscles of Taihang black goats. Methods: In this study, the triceps brachii (TB), longissimus dorsi (LD) and gluteus (GL) muscles of 15 grazing Taihang black goats slaughtered at the age of 2, 3, and 4 (designated as 2-year-old, 3-year-old, and 4-year-old, respectively) were collected. The differences in carcass shape, meat quality, amino acid composition and lipid metabolism gene expression among Taihang black goats of different ages and from different plant parts were compared. Results: Compared with goats at other ages, goats slaughtered at the age of 4 had greater live and carcass weights, meat weights, bone weights and skin areas (p<0.05). LD in the 4-years-old had the lowest cooking loss and moisture content. The crude protein content in the LD of 2-year-old was significantly greater than that in the other age group, and at the age of 2, the LD had the highest crude protein content than TB and GL. The highest fat content was in LD, followed by TB, for goats slaughtered at the age of 4. Eight out of 9 essential amino acids had higher content in the TB compared with other muscles, regardless of age. The total essential amino acid content was highest in the 4-year-old and lowest in the GL muscle at the age of 3. The sterol regulatory element-binding protein-1c (SREBP-1c) and adipose triglyceride lipase (ATGL) genes were significantly more abundant in the TB muscle than in the other muscles for goats slaughtered at the age of 2. At the age of 4, the ATGL and peroxisome proliferator-activated receptor γ (PPARγ) genes were significantly more abundant in the GL than in the LD, while the fatty acid synthase (FAS) genes were significantly less abundant in the GL than in the other muscles. Similarly, compared with those in goats of other ages, the relative mRNA expression levels of the FAS and heart-type fatty acid binding protein (H-FABP) genes in goats slaughtered at the age of 4 were the highest, and the relative mRNA expression of the PPARγ gene was the lowest (p<0.05). The relative mRNA expression of the H-FABP and FAS genes was positively correlated with the intramuscular fat (IMF) content, while the relative mRNA expression levels of the PPARγ and ATGL genes was negatively correlated with the IMF content. Conclusion: Overall, a better nutritional value was obtained for TB from 4-year-old goats, in which the total essential amino acid and fat contents were greater than those of other muscles. The comprehensive action of lipid metabolism genes was consistent with that of the IMF content, among which the FAS, H-FABP, PPARγ, and ATGL genes had positive and negative effects on the process of IMF deposition in Taihang black goats.

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“…Se determinó mediante la recolección al azar de cinco muestras por pradera de 50g de forraje cortadas con tijeras a ras de suelo, de acuerdo con Dennis et al (2015). Cada muestra de forraje colectado estuvo conformada por diferentes especies vegetales presentes en la pradera, las cuales se separaron manualmente y fueron clasificadas como gramíneas, leguminosas, material vivo (verde) y muerto (seco), así como otras plantas.…”

Section: Composición Botánicaunclassified

Composición Botánica Y Evaluación Nutricional in Vitro De Pasto Kikuyo Comparado Con Gramíneas De Clima Templ

Plata-Reyes

Estrada-Flores

López-González

et al. 2021

Trop Subtrop Agroecosyst

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Background: Intensive continuous grazing of temperate grass and legume pastures has been a feeding strategy adopted in small-scale dairy systems (SSDS) in the highlands of central Mexico that reduces costs and increases profitability of farms. However, temperate grasses have low persistency due to agroclimatic and management conditions, so that pastures are invaded by kikuyu grass (Cenchrus clandestinus), a sub-tropical grass that may be a valuable forage resource in these systems. There are not many studies in Mexico on kikuyu grass pastures and on the relationship between botanical composition, nutritional value and ruminal fermentation parameters, important aspects for their inclusion in feeding strategies for dairy cattle. Objective: The objective was to determine the botanical composition and to assess the in vitro digestibility of dry matter (DM), organic matter (OM), and neutral detergent fibre (NDF), and to characterize the kinetics of in vitro ruminal fermentation of a pasture based on with kikuyu grass (KY) in comparison to pastures based on festulolium cv. Spring Green (FL), tall fescue cv. TF-33 (TF), and perennial ryegrass cv. Pay Day (RG), all associated with white clover. Methodology: There were four sampling periods every 14 days. On the last day of each period, five random samples in each pasture were cut to ground level to determine botanical composition by manual separation, and 200g samples from each pasture taken by simulated grazing to determine digestibilities and the in vitro fermentation dynamics. Statistical analyses were following a split-plot model. Results: There was a higher proportion of grasses in KY and a better in vitro nutritional value for RG, related to a higher content of structural carbohydrates in KY, being a subptropical grass compared to temperate pastures with lower content of cell walls. Results: There was a higher proportion (P<0.05) of live grass in KY. There were no differences (P>0.05) among pastures for in vitro nutritional value. There were differences (P<0.05) among pastures and periods for the insoluble fraction fermentation rate (CB) and for the interaction between pastures and periods for gas production in 4.0 h of the soluble fraction (A) and the soluble carbohydrate fermentation rate (CA), but no differences between pastures, periods or the interaction (P>0.05) for other parameters of ruminal fermentation (lag time and total gas production). Implications: Pastures of kikuyu grass associated with white clover have a similar in vitro nutritional value as pastures of temperate grasses representing a valuable forage resource for SSDS. Conclusion: In spite of differences in some in vitro ruminal fermentation parameters, the in vitro nutritional value of kikuyu grass pastures associated with white clover is similar to pastures based on temperate grasses with white clover.

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Effects of co-grazing dairy heifers with goats on animal performance, dry matter yield, and pasture forage composition1

Cited by 11 publications

References 35 publications

Mixed Stocking by Cattle and Goats for Blackberry Control in Rhizoma Peanut–Grass Pastures

Mixed Stocking by Cattle and Goats for Blackberry Control in Rhizoma Peanut–Grass Pastures

Evaluation of carcass traits, meat quality and the expression of lipid metabolism-related genes in different slaughter ages and muscles of Taihang black goats

Composición Botánica Y Evaluación Nutricional in Vitro De Pasto Kikuyo Comparado Con Gramíneas De Clima Templ

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