Fatty acid, amino acid and mineral composition of milk from Nguni and local crossbred cows in South Africa

Mapekula, Monde; Chimonyo, M.; Mapiye, Cletos; Dzama, K.

doi:10.1016/j.jfca.2011.01.014

Cited by 24 publications

(18 citation statements)

References 42 publications

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“…This indicates that nutrition strategies that increase milk casein and protein concentration can also be used to enhance concentrations of key There was no effect of breed within the dairy breeds but the intercept was lower (p <0.001) and the slope greater (p < 0.001) for the pooled buffalo and indigenous breeds of cattle. References include [31,35,37,[40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59] and the present study. Some references may have more than one data point depending upon treatment groups or breeds.…”

Section: Discussionmentioning

confidence: 99%

Mineral and Citrate Concentrations in Milk Are Affected by Seasons, Stage of Lactation and Management Practices

et al. 2019

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This study was conducted to examine associations between nutrition, time of year and season of calving on milk mineral concentrations in 24 pasture-based dairy farms. There was substantial variation in the concentrations (mean with range in parentheses) of Ca 1072 (864-1310) mg/kg; citrate 1579 (880-2080) mg/kg; P 885 (640-1040) mg/kg; Mg 98 (73-122) mg/kg; Na 347 (248-554) mg/kg; K 1534 (1250-2010) mg/kg; and S 295 (155-372) mg/kg with most of the variation associated with stage of lactation, although the influence of days in milk was different for different minerals. Feeding practices were also important in determining the concentrations of some components. Milk Ca, citrate, P, and K concentrations were greater (p < 0.05) in cows receiving mineral supplements, while Ca, P and Mg were positively correlated (p < 0.05) with the amount of concentrates fed. Milk citrate and K concentrations were positively correlated (p < 0.05) with herbage allowance. Milk Se (15 (<3-37) µg/kg) and Zn (3.4 (2.2-4.9) mg/kg) also varied with time of year, with Se concentrations also greater (13.7 vs 11.6 µg/kg) in spring compared with autumn calving herds and positively correlated (p < 0.05) with the amount of concentrates fed and mineral supplementation. These data indicate that calving pattern and feeding practices could be used to reduce variation in the measured milk mineral concentrations.

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Section: Discussionmentioning

confidence: 99%

Mineral and Citrate Concentrations in Milk Are Affected by Seasons, Stage of Lactation and Management Practices

et al. 2019

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“…Unlike beef from cows, which is often an end product, usually after 10 years or more of on-farm productive use, milk, although limited, is available during the lactation lifetime of the animal. Milk is a source of high-quality protein and bioactive fatty acids, essential amino acids, magnesium, zinc, phosphorus, and calcium, retinol and cholecalciferol (vitamin D3) [66,67]. Zhang, Goldsmith, and Winter-Nelson [57] reported that consumption of small amounts of milk in Zambia enhanced the supply of essential nutrients, subsequently reducing the probability of their inadequacy among infants.…”

Section: Milkmentioning

confidence: 99%

Livelihood, Food and Nutrition Security in Southern Africa: What Role Do Indigenous Cattle Genetic Resources Play?

et al. 2020

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Of the 345 million people in the Southern African Development Community (SADC), 30.6% are severely food insecure, 8% malnourished and 50% live with less than US $1 per day, respectively. Livelihood, food and nutrition security have, therefore, become key priorities for the SADC region in response to these complex challenges. Given that 70% of the SADC population directly rely on agriculture for food, nutrition and income, sustained agricultural productivity may play an important role in achieving livelihood, food and nutrition security in the region. Being an important part of the agri-food system of marginalised communities in the region, cattle have great potential to contribute to the goal of reducing food and nutrition insecurity. The region has a population size of about 64 million cattle of which 75% of the population is kept under the smallholder farming systems, and primarily composed of indigenous tropical breeds. Most indigenous cattle breeds are, however, either undergoing rapid genetic dilution or at risk of extinction. At the same time, their environments, production and marketing systems are experiencing high rates of change in time and space. More importantly, indigenous cattle breeds in the region are undervalued. This makes it uncertain that future systems will have the adapted cattle breeds required for optimal livelihoods, food and nutrition security. To this end, the promotion of sustainable use of indigenous cattle for livelihood, food and nutrition security in the SADC region is strongly recommended.

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“…Our results are comparable with the values published in the literature (Schönfeldt et al 2012, Lindmark-Månsson et al 2003, Swaisgood 1995, Davis et al 1994 confirming the genetical background of amino acid composition of milk proteins with very small breed differences. However, minor differences in the amino acid profile of milk between two cattle breeds and their crosses were mentioned by Chrenek et al (1987) or Mapekula et al (2011).…”

Section: Effect Of the Breedmentioning

confidence: 97%

The effect of cattle breed, season and type of diet on nitrogen fractions and amino acid profile of raw milk

Křížová

Hanuš

Roubal³

et al. 2013

Arch. Anim. Breed.

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Abstract. The aim of the study was to describe the differences in nitrogen fractions and deepen the knowledge in the amino acid profile of raw milk affected by the breed of cattle, season and type of feeding. The study was conducted from June 2005 to February 2007 on 64 bulk milk samples collected from eight herds consisting of Czech Fleckvieh (four herds) and Holstein (four herds) breed. One half of the herds of each breed was grazed while the other half was not. Samples were collected twice in winter and twice in summer. The effect of the breed resulted in differences in milk yield that was lower in Czech Fleckvieh (5 385.50 kg) than in Holstein (7 015.15 kg, P<0.05). The content of nitrogen fractions was higher in Czech Fleckvieh than in Holstein (P<0.05). No effect of the breed on the amino acid profile of milk was observed except on the concentration of Glu (P<0.05). The effect of the season was demonstrated in the decrease of the concentrations of nitrogen fractions and Met during summer in comparison to winter (P<0.05). The effect of the type of feeding resulted in lower milk yield (5 197.50 and 7 203.75 kg) and lower concentrations of nitrogen fractions in grazed herds compared to non-grazed herds (P<0.05), respectively. Furthermore, the amino acid profile of milk differed significantly between grazed and non-grazed herds (P<0.05).

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Fatty acid, amino acid and mineral composition of milk from Nguni and local crossbred cows in South Africa

Cited by 24 publications

References 42 publications

Mineral and Citrate Concentrations in Milk Are Affected by Seasons, Stage of Lactation and Management Practices

Mineral and Citrate Concentrations in Milk Are Affected by Seasons, Stage of Lactation and Management Practices

Livelihood, Food and Nutrition Security in Southern Africa: What Role Do Indigenous Cattle Genetic Resources Play?

The effect of cattle breed, season and type of diet on nitrogen fractions and amino acid profile of raw milk

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