Milk Yield of Brahman Cows in a Tropical Beef Production System

Neidhardt, R.; Plasse, D.; Weniger, J. H.; Verde, Omar; Beltrán, Jorge; Benavides, Alfonso

doi:10.2527/jas1979.4811

Cited by 21 publications

(11 citation statements)

References 7 publications

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“…This compares favourably to other estimates of milk yield in the tropics of 2.5 to 6 l cow -1 day -1 (Stobbs and Thompson 1978, Neidhardt et al, 1979, Suttie 2008. Milk yield per hectare, averaged over all farms, was 3.0 l ha -1 day -1 .…”

Section: General Performancesupporting

confidence: 76%

“…Previous studies have shown that if a high producing cow's energy demands are not met by an adequate plane of nutrition a loss of body condition results (Neidhardt et al, 1979, Ezanno et al, 2005, Lee and Kim 2006. There was no effect of time in milk on body condition score in this study, although previous studies have shown that body condition scores vary quadratically with days in milk and that change in body condition score is related quadratically to milk yield within a lactation (Waltner et al, 1993, Domecq et al, 1997and Msangi et al, 2005.…”

Section: The Effect Of Milk Production On Body Condition Scorescontrasting

confidence: 69%

“…Aspects of farm management examined included; night grazing, stocking rates and food supplementation. Based on previous studies we predicted: 1) that availability of pasture shade would improve body condition and increase milk yield (Mitlöhner et al, 2001, Marcillac-Embertson et al, 2009; 2) that stocking density would negatively affect body condition and milk yield (Macdonald et al, 2008) and finally; 3) that increased milk yield would have a negative effect on body condition (Neidhardt et al, 1979, Ezanno et al, 2005.…”

Section: Introductionmentioning

confidence: 99%

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Pasture shade and farm management effects on cow productivity in the tropics

Ainsworth

Moe

Skarpe³

2012

Agriculture, Ecosystems & Environment

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Shade, provided by trees within pastures, can affect cattle productivity through mitigating heat stress and by altering understorey pasture growth and cattle behaviour. Models for daily milk yield and body condition were used to evaluate the effect of pasture shade on dual purpose cow productivity within a silvopastoral system in a dry tropical province of Nicaragua. Daily milk yield and body condition were both negatively affected by pasture shade. Stocking density and age also had negative effects on daily milk yield, whilst night grazing had a positive effect. In addition, body condition was negatively affected by average daily milk yield and was positively affected by feed supplementation. There was a correlation between pasture shade and stocking density in both production models suggesting farmers compensated for decreased cow productivity, associated with increased pasture shade, by reducing stocking density. It is proposed that the positive effect of shade mitigating heat stress was likely present but its effect did not compensate for the decreased nutrient intake by the cows caused by either negative behavioural effects or reduced pasture productivity, or both.

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Section: General Performancesupporting

confidence: 76%

Section: The Effect Of Milk Production On Body Condition Scorescontrasting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

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Pasture shade and farm management effects on cow productivity in the tropics

Ainsworth

Moe

Skarpe³

2012

Agriculture, Ecosystems & Environment

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“…However, Totusek et al (1973) found, using the weigh-suckle-weigh method, that the lactation curve for beef cows was nearly similar to that for dairy cows, peaking at 7 compared to 4 wk with hand-milking. Neidhardt et al (1979) and Ramirez and Porte (1976) ;; i; Z+ x-i * q': -1 i q -'9 09'9 i €@@or+r€rr <r+5 C)*Nnn…”

Section: Methodsmentioning

confidence: 99%

Factors Influencing Lactation Performance of Range Beef and Dairy-Beef Cows

Butson¹,

Berg²

1984

Can. J. Anim. Sci.

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An investigation was carried out to study factors influencing milk yields and milk constituents among range cows. June and September measurements of milk yield and constituent percentages of butterfat (BF), protein (PT) and lactose (LT) were taken using 206 and 222 cows in 1976 and 1977, respectively. The cows, representing four beef and dairy-beef breed groups, were from the University of Alberta beef herd and ranged in age from 2 to 10 years. Regression of milk yield on calf age (CA) demonstrated a negative association over the lactation period measured, although regression coefficients were not statistically significant. Associations between all constituent yields with CA were negative. However, regression coefficients of June and September constituent percentage variables on CA indicated a more positive association as lactation progressed. Cow weight loss during gestation, cow weight at calving and ADG during lactation did not account for a significant proportion of the variation in either milk or constituent yields or constituent percentages over and above main effects. The association between cow ADG during lactation and all yields was negative although not statistically significant. Calf birth-weight was positively associated with all yields, and showed negative association with BF% and PT%. Calf average daily gain measured from birth to September was highly associated with yields of milk and constituents, declining from June to September. Its association with BF% and PT% was negative. Cow calving interval was introduced as a possible factor influencing milk yields of 3- and 4-yr-old and mature cows. Its association with lactation performance was however, not significant. Key words: Lactation, range cows

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“…Supplemental feed activities included commercial concentrate commonly used on dual-purpose farms in the Sur del Lago in 1987 and 1988, as well as locally available supple ments such as molasses, urea, and cassava root (referred to subsequently as 'alternative' feeds). Mobilization and repletion of adipose and protein tissues by cows are included because the dynamics of body tissue are a physiological reality in some tropical situations (Neidhardt et al, 1979), and because Reyes et al (1981) found that management of body tissue dynamics could improve farm profitability.…”

Section: Model Activitiesmentioning

confidence: 99%