scholarly journals Natural and improved natural pastures on the reproductive performance of first-calf beef cows

2011 ◽  
Vol 40 (3) ◽  
pp. 690-699 ◽  
Author(s):  
Soraya Tanure ◽  
Bernardo Augusto Albornoz Pötter ◽  
José Fernando Piva Lobato
Keyword(s):  
Body Weight ◽  
Breeding Season ◽  
Body Condition ◽  
Reproductive Performance ◽  
Body Condition Score ◽  
Lolium Multiflorum ◽  
Protein Supplementation ◽  
Protein Supplement ◽  
Natural Pasture ◽  
Condition Score

This work evaluated the reproductive performance of first-calf cows at three years of age, submitted or not to protein supplementation at yearling on natural pastures. After calving, cows were managed on natural or improved pastures. The feeding managements were the following: on natural pastures as yearlings and during pregnancy, post-calving period and breeding season; on natural pastures with protein supplement as yearlings and only natural pasture during pregnancy, post-calving and breeding season; on natural pastures as yearlings and during pregnancy and on improved natural pastures (Lolium multiflorum L., Trifolium repens cv. Yi and Lotus corniculatus cv. São Gabriel) during the post-calving period and breeding season; on natural pastures with protein supplement at yearling, on natural pastures during pregnancy, and on improved natural pasture during post-calving period and breeding season. Cows did not differ on body weight, but from calving to the beginning of breeding season, cows on improved natural pastures presented higher weight gain than those on natural pastures (0.203 vs. 0.109 kg/day). Cows in post-calving on natural pastures lost 1.0 point of body condition score during mating, determinant of the lowest pregnancy rate and later conception in relation to cows on improved natural pasture. Pregnant cows presented higher body weight (440 vs. 413 kg) and body condition score (4.14 vs. 3.66 points) than open cows at the end of the breeding season.

scholarly journals Pre- and post-calving forage systems and reproductive performance of primiparous cows

2010 ◽  
Vol 39 (9) ◽  
pp. 2081-2090 ◽  
Author(s):  
José Fernando Piva Lobato ◽  
André Luís Menegaz ◽  
Antonio Carlos Gonçalves Pereira
Keyword(s):  
Pregnancy Rate ◽  
Breeding Season ◽  
Body Condition ◽  
Reproductive Performance ◽  
Body Condition Score ◽  
Natural Pasture ◽  
Body Weights ◽  
Condition Score ◽  
In The Beginning ◽  
Improved Pasture

During pre and post calving periods, it was evaluated the influence of the following forage systems on reproductive performance of primiparous cows: natural pasture during pre and post-calving periods; natural pastures during pre-calving period and improved pastures during post-calving period; improved pastures during pre-calving and natural pasture during post-calving; improved pasture during pre- and post-calving periods. The lowest body weights and body condition scores were observed on cows kept on natural pastures pre-calving (384.3 kg and 3.31; 391.4 kg and 3.60), followed by those on improved pastures during pre-calving and on natural pasture during post-calving period (424.4 kg and 3.60), finally, cows on improved pasture during pre- and post-calving period (421.2 kg and 3.59). Cows on improved pastures pre and post-calving showed higher body weight and body condition score in the beginning of the breeding season (442.1 kg and 3.76), higher pregnancy rate (82.3%) and they conceived earlier. Natural system during pre-calving and improved on post-calving and that with improved pasture in pre-calving and natural in post-calving did not differ on weight at the beginning of breeding season (417.2 and 409.8 kg) and on pregnancy rate (65.8 and 62.8%), respectively. However, cows on natural pasture in pre-calving and on improved pasture in post-calving conceived earlier. Cows on natural pastures showed lower weight in the beginning of breeding season (391.2 kg), the lowest pregnancy rate (52.7%), and they conceived later. Cows maintained on improved pastures pre- and post-calving improved weight and body condition score at calving and beginning of the breeding season making high reproductive performance possible.

Genetic aspects of body weight, body condition score, scrotal circumference and reproductive performance in Italian Holstein young bulls

2003 ◽  
Vol 2003 ◽  
pp. 53-53 ◽  
Author(s):  
S. Biffani ◽  
A.B. Samoré ◽  
F. Canavesi ◽  
E. Olzi ◽  
M. Cassandro
Keyword(s):  
Body Weight ◽  
Body Condition ◽  
Reproductive Performance ◽  
Body Condition Score ◽  
Point Of View ◽  
Progeny Testing ◽  
Scrotal Circumference ◽  
Good Physical Condition ◽  
Condition Score ◽  
Recessive Genes

Apart from all the issues regarding health and undesirable recessive genes, which are determining factors to identify bulls not suitable for AI, there are other aspects which can be considered. The principal aims of AI studs are the selection of the best animals from a genetic point of view and the production of semen in a very short time, in order to start progeny testing as soon as possible. In Italy progeny testing starts when 1200 straws for each young bull are available. This requirement implies that bulls should be in good physical condition. According to this, the genetic centre of the Italian Holstein Breeder Association (ANAFI) has been paying growing attention to animal welfare and fitness, recording routinely some biometrical indicators. Body weight (BW), scrotal circumference (SC), body condition score (BCS) are some examples of this policy and could be helpful and easy predictors of reproductive performance for a young progeny testing dairy bull. The objective of this report was to conduct a preliminary analysis on the genetic aspects of BW, BCS, SC, age at the 1st usable straw (AGE1) and age at the 1200th straw (AGE1200) in Italian Holstein young bulls.

scholarly journals Reproductive Performance of Dairy Cows in Relation to Genotype, Age, Parity, Body Weight and Body Condition Score at Rajshahi District of Bangladesh

2020 ◽  
Vol 7 (3) ◽  
pp. 481-495
Author(s):  
Rashida Khaton
Keyword(s):  
Body Weight ◽  
Dairy Cows ◽  
Body Condition ◽  
Reproductive Performance ◽  
Body Condition Score ◽  
Post Partum ◽  
Age Groups ◽  
Reproductive Traits ◽  
Condition Score ◽  
Heat Period

The present study was carried out from selected areas at Rajshahi district to evaluate the reproductive performance of dairy cows in relation to breed/genotype, age, parity, body weight and body condition. A total of 500 cows selected and data were collected directly from the dairy farms owner by using pre-tested questionnaires during the period from September 2013 to December 2014. The average reproductive performance (RP) were recorded as age at puberty (AP) 26.42±0.22 m, age at first calving (AFC) 35.48±0.22 m, post-partum heat period (PPHP) 121.85±3.48 days, service per conception (S/C) 1.93±0.04, days open (DO) 136.80±3.57 days and calving interval (CI) 401.04±3.94 days. Genotype had significant effect (P<0.05) on all the reproductive traits except on S/C. Local (L) × Holstein Friesian (HF) genotype showed earlier AP and AFC than L× Sahiwal (SL) and L. Age group had significant (P<0.05) effect on AP, AFC and other parameters were not significant (P>0.05). Middle age groups of cows had shown better RP than others groups. Parities of cows had significant effect (P<0.05) on PPHP, S/C, DO except on AP, AFC and CI. Third parity had better RP than others. The best RP was found in >300 kg BW groups. Body condition score had significant effect (P<0.05) on all RP. Good body condition score (BCS) had excellent RP. Res. Agric., Livest. Fish.7(3): 481-495,  December 2020

scholarly journals Corn-based or high linoleic acid flushing increases productivity of Morada Nova and Brazilian Somalis ewes

2019 ◽  
Vol 20 ◽  
Author(s):  
Rafael Teixeira de Sousa ◽  
Marco Aurélio Delmondes Bomfim ◽  
Fernando Henrique Melo Andrade Rodrigues de Albuquerque ◽  
Claudiane Morais dos Santos ◽  
Viviane Borba Ferrari ◽  
...  
Keyword(s):  
Linoleic Acid ◽  
Breeding Season ◽  
Body Condition ◽  
Reproductive Performance ◽  
Body Condition Score ◽  
Control Treatment ◽  
High Linoleic Acid ◽  
Body Weights ◽  
Before And After ◽  
Condition Score

SUMMARY The objective of this study was to compare the corn-based (FLU), high linoleic acid flushings(LAF), and a control treatment (un supplemented, CON); two genetic groups:Morada Nova (MN) and Brazilian Somalis (BS), on the productive and reproductive performance of ewes and their lambs. A total of 156 non-pregnant ewes were supplemented three weeks before and after the breeding season. Supplementation with either FLU or LAF increased ewe body condition score (BCS) at the beginning of the breeding season and at lambing compared to CON. The BS ewes had greater body weights at the supplementation end, and BCS both at the supplementation start, and at lambing compared to MN. Similarly, ewes with three lambs per birth had greater BCS at the beginning of supplementation. They also had greater weights at the beginning of the breeding season and at lambing. Both FLU and LAF increased total lamb weight from 56 to 105 days of age compared to CON.The BS ewes had decreased prolificity and produced lower total weight of lambs at lambing, but greater 84 and 105 days after birth compared to MN. Total lambweight at birth was greater for ewes that lambed three, followed by two and then one lamb per birth. In conclusion, the high linoleic acid and high corn supplementation increase body condition score of ewes form breeding season to lambing and enhance lamb performance after 56 days of age. Although Morada Nova ewes increased prolificacy, their lambs were lighter after they reached 84 days of age.

The effect of nutrition before mating on the reproductive performance of Merino ewes

1966 ◽  
Vol 6 (23) ◽  
pp. 455 ◽  
Author(s):  
P McInnes ◽  
MD Smith
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Body Condition ◽  
Reproductive Performance ◽  
Body Condition Score ◽  
Body Weight Gain ◽  
Significant Relation ◽  
Critical Weight ◽  
Condition Score ◽  
High Level

A factorially designed trial was used to study the effects of level of nutrition on the reproductive performance of Merino ewes. A high level of nutrition from three weeks before joining to conception (flushing) increased the percentage of twin births independently of the effects of previous levels of nutrition. Levels of nutrition did not affect the number of ewes that lambed. Flushing increased body weight and body condition score. Re-analysis of the results showed that there was an association between both body weight gain and body condition score and percentage of twin births. However, body weight gain and body condition score increase during flushing were associated with levels of nutrition before flushing. Although flushing increased body weight of groups at conception, on re-analysis of the results, the percentage of twin births could not be associated with weight at conception. Possible reasons for this result are suggested. As there was no indication of a significant relation between weight at conception and percentage of ewes that lambed, it is suggested that the critical weight for mating these ewes was below 38.7 kg.

Performance and metabolic status of grazing beef heifers receiving increasing protein supplementation pre- and postpartum

2019 ◽  
Vol 59 (7) ◽  
pp. 1244 ◽  
Author(s):  
Deilen Sotelo ◽  
Mário Fonseca Paulino ◽  
Luciana Navajas Rennó ◽  
Edenio Detmann ◽  
Roman Maza Ortega ◽  
...  
Keyword(s):  
Body Condition ◽  
Body Condition Score ◽  
Average Daily Gain ◽  
Protein Supplementation ◽  
Metabolic Status ◽  
Protein Supplement ◽  
Beef Heifers ◽  
Condition Score ◽  
Mineral Mixture ◽  
Daily Gain

The objective of the present study was to evaluate the effect of increasing levels of prepartum and postpartum protein supplementation on nutrient intake and digestibility, productive performance and metabolic status of beef heifers on tropical pasture. Twenty-eight pregnant beef heifers with bodyweight and body condition score of 459.7 ± 6.8 kg and 5.8 ± 0.10 respectively, were used. The experiment was performed according to a completely randomised design, with the following four treatments: 0.0, 0.4, 0.8 and 1.2 kg/animal.day of protein supplement containing 25% crude protein. All animals received a mineral mixture ad libitum. The experiment lasted 210 days, divided into three experimental periods. The supplementation level increased the intake of all evaluated nutrients, digestibility of organic matter, neutral detergent fibre corrected for ash and protein, as well as higher average daily gain prepartum and bodyweight of calves at birth (P &lt; 0.05). Protein supplement at the levels evaluated did not affect body condition score (P &gt; 0.05). An interaction effect between treatment × days in relation to calving occurred for concentrations of serum urea nitrogen, total proteins, albumin and globulins (P &lt; 0.05). Supplementation did not affect glucose, triglyceride, non-esterified fatty acids, β-hydroxybutyrate or progesterone (P &gt; 0.05). In conclusion, supply of up to 1.2 kg/day of protein supplement for grazing beef heifers optimises forage intake and average daily gain before calving, and improves the indicators of the protein status.

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