Effect of concentrate feeding on milk yield and body-weight change of Awassi ewes and the growth of their lambs

Jassim, Rafat Al; Aziz, D.I.; Zorah, K T; Black, J. L.

doi:10.1017/s1357729800051018

Cited by 21 publications

(13 citation statements)

References 4 publications

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“…Similarly, the total colostrum yield to 18 h postpartum was negatively affected by ME intake in the present study, with the volume of colostrum produced declining as ewes were fed restricted levels of ME in the prepartum period (O'Doherty and Crosby, 1996;Tygesen et al, 2008). Previous authors have stated that this negative impact on udder development, specifically udder size and weight, can result in carryover effects on the milk production potential of the ewe throughout lactation (Robinson and Forbes, 1968;Louca et al, 1974;Peart et al, 1979;Mellor et al, 1987;Al-Jassim et al, 1999). This decline in both colostrum and milk yield, seen in ewes fed the restricted energy treatment in the present study, stems from the competition in demand for nutrients between the growing fetus and the mammary gland, where maximal growth and differentiation of alveolar epithelial cells is taking place (Swanson et al, 2008).…”

Section: Discussionsupporting

confidence: 62%

Altering ewe nutrition in late gestation: I. The impact on pre- and postpartum ewe performance1

McGovern

Campion

Lott

et al. 2015

Journal of Animal Science

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The present study was conducted to examine the effects of offering a single diet rationed to 80% (80% ME), 100% (100% ME), or 120% (120% ME) of recommended ME requirements from d 119 of gestation to lambing, with concurrent changes in other dietary nutrients. The effects on pre- and postpartum ewe performance, including estimated milk yield and milk fatty acid concentrations, were monitored. Sixty twin-bearing ewes were allocated to 1 of 3 dietary treatments ( = 20 per treatment) and individually fed for the final 4 wk of gestation. Metabolizable energy requirements were individually calculated for each ewe and amended according to treatment. Ewes were rationed daily on the basis of their treatment ME allocation, which led to concurrent alterations in other nutrient intakes. Diets were grass silage based and supplemented with concentrates to meet treatment ME allocation on an individual ewe basis. Ewes offered the 80% ME treatment had a lower liveweight ( = 0.04) and BCS ( = 0.03) at 24 h postpartum when compared with ewes offered the 120% ME diet. Although there was no difference in liveweight at either d 40 ( = 0.18) or 98 postpartum ( = 0.20), the difference in BCS persisted until d 40 postpartum ( = 0.02). Colostrum yield at 1 h postpartum ( = 0.03) and total yield up to 18 h postpartum ( = 0.04) was greater for ewes offered the 120% ME diet than either of the other treatment groups. Similarly, these ewes had a greater estimated milk yield during wk 3 of lactation ( = 0.04) and elevated concentrations of short-chain SFA ( = 0.02) and long-chain SFA ( ≤ 0.05) from wk 2 through 6 of lactation. In summary, the negative impact of applying a dietary insult to ewes in late gestation is reflected in colostrum and estimated milk yield and fatty acid composition, thus potentially influencing postpartum growth and development of the offspring.

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Section: Discussionsupporting

confidence: 62%

Altering ewe nutrition in late gestation: I. The impact on pre- and postpartum ewe performance1

McGovern

Campion

Lott

et al. 2015

Journal of Animal Science

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“…The peak of milk production (4th to 6th week of lactation) is in consonance with earlier reports on Awassi ewes (Al-Jassim et al, 1999). Milk yield consistently declined with advancing lactation indicating a negative correlation between milk yield and lactation period.…”

Section: Discussionsupporting

confidence: 91%

Effect of pre- and post-partum dietary crude protein level on the performance of ewes and their lambs

Ahmed

Salem

Olafadehan

et al. 2016

Small Ruminant Research

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In a block randomized design, fifty-one Barki ewes weighing 38.0 kg in average and 2-4 years old, were used to study the effect of pre-and post-lambing dietary crude protein level (CP) of concentrates on the milk yield, milk composition and weight of ewes, and performance of their lambs. The treatments comprised supplementary concentrate containing (g/kg dry matter (DM)): (1) 110 CP (low), (2) 130 CP (medium) and (3) 150 CP (high), while Egyptian berseem hay (Trifiolium alexandrinum) was the basal diet. Ewes were weighed individually biweekly, and the number of lambs dropped and nursed by ewes was recorded within 24 h after birth and biweekly subsequently. Newborn lambs were left to suckle their dams freely, except for the period when milk yield was recorded by weighing lambs before and after suckling. Milk yield was estimated once a week. Ewes were fed the experimental diets during the last two months of pregnancy and throughout the lactation period. Ewes fed 110 g CP/kg DM attained peak of milk yield earlier than those fed 130 and 150 g CP/kg DM. Total milk yield, milk fat and milk total solids, and weaning weight, average daily gain and relative growth rate of lambs were higher (P < 0.05) for ewes fed medium and high protein levels compared to those fed low protein level. Suckled milk was affected by protein level (P < 0.05); the rank order was: 110 CP < 130 CP < 150 CP. Milk protein and extractable milk were higher (P < 0.05) for high protein level compared to low protein level but solids-not-fat (SNF) and lamb birth weight were not affected (P > 0.05) by protein level. Lamb sex, and parity and weight at lambing of ewes had no effect (P > 0.05) on suckled milk, extractable milk and milk yield. Whereas lamb sex and parity of ewe had no effect (P > 0.05) on milk composition, ewe lambing weight affected (P < 0.05) milk fat and SNF but not milk protein and total solids (P > 0.05). Weights of ewes during gestation, after lambing (post-partum weight loss) and during lactation were not affected (P > 0.05) by protein level, except at the 3rd month of lactation. Lamb sex, parity and lambing weight had pronounced (P < 0.05) effects on lamb birth weight and weaning weight. It is concluded that 150 g CP/kg DM level pre-and post-partum could be used for improved performance of ewes and their lambs while parity and weight of ewe at lambing should also be given consideration.

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“…These results agreed with those obtained by Al-Jassim et al (1999), who found that weaning weight and live weight gain were slightly higher in the high dietary, but differences between groups were not statistically significant (P>0.05) when Awassi ewes were fed a concentrate diet at three amount, high (1350 g), medium (1150 g) and low (950 g) per head per day. Aziz and Al-Dabbagh (2008) reported insignificant effect of nutritional plane on lambs weight traits.…”

Section: Table 11 Effect Of Creep Feeding and Level Of Requirements supporting

confidence: 91%

Effect of Creep Feeding of Lambs and Plane of Nutrition of Ewes on the Productive Performance of Ewes During Suckling Period

Agwa¹,

Saleh²,

El-Rhman³

et al. 2016

Zagazig Journal of Agricultural Research

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The aim of the present work was to test the effect of offering ewes different levels of NRC requirements (1975) with feeding its lambs creep feeding on milk yield and composition and growth of produced lambs from birth until weaning. Fifty four local Egyptian ewes (average 3-4 years old and of an average live body weight of 41.6 kg) at lambing were used in this study. Experimental ewes were divided after lambing directly into three equal groups (18 ewes each). In the 1 st group (G 1), ewes received 100 % of NRC requirements. In the 2 nd group (G2), ewes received 85 % of NRC requirement and those in the 3 rd group (G3) were received 70 % of NRC requirements. Within each experimental group, ewes were divided into two equal subgroups (9 ewes each). Lambs of the first subgroup were fed additional ration during suckling period through creep feeding, while in the 2 nd subgroup; lambs were maintained without any additional ration. Results showed that overall mean of milk yield, 4% fat corrected milk yield (4% FCM), fat percentage and fat yield of ewes at different days after lambing were not affected significantly by creep feeding. However, at day 60 after lambing, percentages of total solids and solids not fat were affected significantly (P<0.05) due to creep feeding. Percentages of ash, total solids and solids not fat in ewe's milk were affected significantly at days 30 and 45 after lambing by level of NRC requirements. No significant difference due to creep feeding and level of requirements in ewe's body weights at different days after lambing. Lamb daily gain at fourth weeks of age improved significantly (P<0.05) due to creep feeding. Also, daily gain of lambs from birth to weaning was compatible to the data of overall mean of 4% FCM yield.

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Effect of concentrate feeding on milk yield and body-weight change of Awassi ewes and the growth of their lambs

Cited by 21 publications

References 4 publications

Altering ewe nutrition in late gestation: I. The impact on pre- and postpartum ewe performance1

Altering ewe nutrition in late gestation: I. The impact on pre- and postpartum ewe performance1

Effect of pre- and post-partum dietary crude protein level on the performance of ewes and their lambs

Effect of Creep Feeding of Lambs and Plane of Nutrition of Ewes on the Productive Performance of Ewes During Suckling Period

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