Effect of feeding level on milk production, body weight change, feed conversion and postpartum oestrus of crossbred lactating cows in tropical conditions

Sanh, M. V.; Wiktorsson, H.; Ly, Le Viet

doi:10.1016/s0301-6226(02)00026-x

Cited by 11 publications

(10 citation statements)

References 5 publications

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“…It is possible that extra energy consumption would be partitioned to body stores as adipose tissue and muscle resulting in weight gain. This result is in agreement with Sanh et al. (2002) who reported that the levels of feed intake accounts for changes in both milk yield and body weight.…”

Section: Discussionsupporting

confidence: 93%

Effects of misty‐fan cooling and supplemental rbST on rumen function and milk production of crossbred Holstein cattle during early, mid and late lactation in a tropical environment

Chanchai¹,

Chanpongsang²,

Chaiyabutr³

2010

Animal Science Journal

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Two groups of five crossbred 87.5% Holstein cattle were housed in normal shade only (NS) as non-cooled cows and in shaded housing with misty-fan cooling (MF) as cooled cows. The cows were treated with recombinant bovine somatotropin (rbST) in early, mid and late lactation with three consecutive injections of rbST in every 14 days. Ambient temperatures and the temperature humidity index in the NS barn were significantly higher than those of the MF barn, whereas relative humidity in MF was higher than that of NS barn. The DMI of cooled cows were higher than those of non-cooled cows, and cooled cows exhibited more response to rbST treatment. Exogenous rbST significantly increased milk yield throughout lactation. The rbST-treated cows had higher total ruminal fermentation products as volatile fatty acid and ammonia nitrogen than the non-rbST treated cows and associated changes were greater in cooled animals in all stages of lactation. Exogenous rbST increased the concentrations of milk urea nitrogen in both groups. These results suggest that the changes in ruminal fermentation with greater production of total VFA and NH(3)N in response to rbST in crossbred cows whether under misty-fan cooling or not, is in part through an increase in feed intake, thereby making more substrate available to the mammary gland for milk synthesis.

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Section: Discussionsupporting

confidence: 93%

Effects of misty‐fan cooling and supplemental rbST on rumen function and milk production of crossbred Holstein cattle during early, mid and late lactation in a tropical environment

Chanchai¹,

Chanpongsang²,

Chaiyabutr³

2010

Animal Science Journal

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“…The incidence of twinning in Holstein and Jersey cows tended to be greater for cows in the RPC group (Janovick Guretzky et al 2006). There was a strong significant tendency to a prolonged interval between calving and first estrous for the lactating cows fed a low level of requirement versus cows fed high levels of requirement (Sanh et al 2002). §Milk efficiency was also calculated as nitrogen (N) in milk/N consumed) 9 100.…”

Section: Effect Of Rpc On Productive and Reproductive Efficiency Of Fmentioning

confidence: 99%

“…There was a positive significant relationship between energy balance in the first weeks after calving and interval to first ovulation and duration of postpartum anestrous in dairy cows. There was a strong significant tendency to a prolonged interval between calving and first estrous for the lactating cows fed a low level of requirement versus cows fed high levels of requirement (Sanh et al 2002). The evaluation of estrous behavior showed a negative linear regression between energy intake levels and time of return to estrous in dairy goats postpartum (Costa et al 2014).…”

Section: Effect Of Rpc On Productive and Reproductive Efficiency Of Fmentioning

confidence: 99%

Effect of adding different levels of rumen protected choline to the diet on productive and reproductive performance of female goats and growth of their kids from birthing to weaning

Habeeb

Gad

Atta

et al. 2017

Animal Science Journal

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Forty female goats in the third parity were randomly divided into four similar groups. The experiment was started 20 days before mating and lasted until the end of the suckling period for 60 days and weaning their kids. The first group were fed diet without supplementation and kept as control while in the second, third and fourth groups, each doe was fed diets with rumen protected choline (RPC) at the rate of 10, 20 and 40 g/day, respectively. Results showed that number of doe kidding twins and triplets and litter weight of kids born per group increased with increasing the level of RPC in the diet of goats and viability rate of born kids during the suckling period improved due to RPC supplementation in the diets of their mothers. Duration of estrous, days from weaning to estrous, days from kidding to estrous and kidding interval decreased significantly, while conception rate increased due to adding RPC. Milk choline concentrations and total choline secretion though milk were progressively increased significantly with increasing the level of RPC supplementation. Live body weight and daily body gain of their suckling male and female kids at weaning increased significantly with increasing RPC levels in the diets of their mothers.

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“…On average, there is usually some loss of body energy to milk production during lactation, so there would be an effect of the previous (t ÿ 1) specific activity on the present (t) milk. Sanh et al (2002) showed a delay of about two weeks between changes in feed energy intake and milk production in cows, implying some transfer of body energy into milk production. Thus, it is appropriate to account for the specific activity in previous time steps, and the relevant half-time is the fractional transfer rate of body energy to milk energy.…”

Section: Milk (Bq G ÿ1 Milk C)mentioning

confidence: 99%

Conceptual approaches for the development of dynamic specific activity models of 14C transfer from surface water to humans

Sheppard¹,

Ciffroy

Siclet

et al. 2006

Journal of Environmental Radioactivity

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Effect of feeding level on milk production, body weight change, feed conversion and postpartum oestrus of crossbred lactating cows in tropical conditions

Cited by 11 publications

References 5 publications

Effects of misty‐fan cooling and supplemental rbST on rumen function and milk production of crossbred Holstein cattle during early, mid and late lactation in a tropical environment

Effects of misty‐fan cooling and supplemental rbST on rumen function and milk production of crossbred Holstein cattle during early, mid and late lactation in a tropical environment

Effect of adding different levels of rumen protected choline to the diet on productive and reproductive performance of female goats and growth of their kids from birthing to weaning

Conceptual approaches for the development of dynamic specific activity models of 14C transfer from surface water to humans

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