Winter and spring variation in daily milk yield and mineral composition of Jersey, Friesian cows and their crosses under a pasture-based dairy system

Nantapo, Carlos Wyson Tawanda; Muchenje, Voster

doi:10.4314/sajas.v43i5.3

Cited by 18 publications

(27 citation statements)

References 19 publications

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“…However, in another study on dairy cows (Jersey, Friesian, Jersey × Friesian) it was reported that, genotypes had a significant effect on some milk mineral compositions, including magnesium, phosphorus, and calcium, with crossbreeds (Jersey × Friesian) having a higher composition of minerals, even though the animals grazed on the same pasture [47]. The reason for the higher milk mineral compositions in the crossbreed compared to Jersey and Friesian cows were attributed to heterosis [47].…”

Section: Discussionmentioning

confidence: 99%

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Yield and Milk Composition at Different Stages of Lactation from a Small Herd of Nguni, Boer, and Non-Descript Goats Raised in an Extensive Production System

2017

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This study was conducted to evaluate the yield and composition of milk from 30 indigenous South African goats of different genotypes, namely Nguni, Boer, and non-descript, reared under a free-ranging system. Milk yield and composition (milk fat, protein, lactose, solid non-fat, and minerals) from Nguni (10), Boer (10) and non-descript (10) goats were measured and analysed per week at each stage of lactation. Results showed that Nguni goats produced (1.2 ± 0.09, 1.3 ± 0.11 and 1.2 ± 0.07 L per day) more milk (p < 0.05) at early, mid-, and late stages of lactation than Boer (0.6 ± 0.10, 1.0 ± 0.17, and 0.6 ± 0.09 L per day) and non-descript (0.3 ± 0.10, 0.3 ± 0.12, and 0.3 ± 0.09 L per day) goats, respectively. The mean value of milk fat, protein, and lactose content from Nguni goats was 3.98, 3.54, and 5.31; Boer goats, 2.9, 3.59, and 5.04 and non-descript goats, 4.05, 3.39, and 5.02, respectively. There was a significant effect (p < 0.05) of genotypes on milk fat, milk magnesium, and sodium contents of Nguni, Boer, and non-descript goats. It could be concluded that Nguni goats produced more milk than Boer and non-descript goats, but the non-descript goat had a higher mean percentage of milk fat compared to Nguni and Boer goats.

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Section: Discussionmentioning

confidence: 99%

“…The reason for the higher milk mineral compositions in the crossbreed compared to Jersey and Friesian cows were attributed to heterosis [47].…”

Section: Discussionmentioning

confidence: 99%

Yield and Milk Composition at Different Stages of Lactation from a Small Herd of Nguni, Boer, and Non-Descript Goats Raised in an Extensive Production System

2017

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“…In one of the previous studies on the milk mineral compositions, the mean percentage for calcium was given to be 805.1 mg/l which is higher compared to the present study [49]. The reason for the variation in the mineral composition for these different studies could be attributed to differences in locality, management systems, diet type and different seasons of milk production [46,50].…”

Section: Discussionmentioning

confidence: 41%

“…However, in another study on dairy cows (Jersey, Friesian, Jersey x Friesian) it was reported that, genotypes had a significant effect on some milk mineral compositions including magnesium, phosphorus and calcium with cross breeds (Jersey x Friesian) having a higher composition of minerals even though the animals grazed on the same pasture [46]. The reason for the higher milk mineral compositions in the cross breed compared to Jersey and Friesian cows were attributed to heterosis [46].…”

Section: Discussionmentioning

confidence: 99%

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Yield and Milk Quality Parameters at Different Stages of Lactation from a Small Herd of Nguni, Boer and Non-Descript Goats Raised in an Extensive Production System

Idamokoro¹,

Muchenje²,

Masika³

2017

Preprint

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This study was conducted to evaluate the yield and quality parameters of milk from 60 indigenous South African goats of different genotypes namely Nguni, Boer and Non-descript reared under a free ranging system. Milk yield and quality parameters (milk fat, protein, lactose, solid non-fat and minerals) from Nguni (10), Boer (10) and Non-descript (10) goats was measured and analysed per week at each stage of lactation. Result showed that, Nguni goats produced (1.2±0.09, 1.3±0.11 and 1.2±0.07 litres per day) more milk (P ˂ 0.05) at early, mid and late stages of lactation than Boer (0.6±0.10, 1.0±0.17 and 0.6±0.09 litres per day) and Non-descript (0.3±0.10, 0.3±0.12 and 0.3±0.09 litres per day) goats, respectively. The mean value of milk fat, protein and lactose content from Nguni goat was (3.98, 3.54 and 5.31); Boer goat (2.9, 3.59 and 5.04) and Nondescript goat (4.05, 3.39 and 5.02), respectively. There was significant effect (P ˂ 0.05) of genotypes on milk fat, milk magnesium and sodium contents of Nguni, Boer and Non-descript goats. It could be concluded that, Nguni goat produced more milk than Boer and Non-descript goats, but the Nondescript goat had higher mean percentage of milk fat compared to Nguni and Boer goats.

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Variation in macrominerals and trace elements in cows’ retail milk and implications for consumers nutrition

et al. 2023

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Winter and spring variation in daily milk yield and mineral composition of Jersey, Friesian cows and their crosses under a pasture-based dairy system

Cited by 18 publications

References 19 publications

Yield and Milk Composition at Different Stages of Lactation from a Small Herd of Nguni, Boer, and Non-Descript Goats Raised in an Extensive Production System

Yield and Milk Composition at Different Stages of Lactation from a Small Herd of Nguni, Boer, and Non-Descript Goats Raised in an Extensive Production System

Yield and Milk Quality Parameters at Different Stages of Lactation from a Small Herd of Nguni, Boer and Non-Descript Goats Raised in an Extensive Production System

Variation in macrominerals and trace elements in cows’ retail milk and implications for consumers nutrition

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