Post-partum Mating Research Articles

Kemampuan Deteksi Birahi dan Penentuan Waktu Kawin Sapi Bali Setelah Partus Di Kecamatan Taniwel Timur Kabupaten Seram Bagian Barat

The aim of this research was to determine the ability to detect lust and determine the correct mating time by farmer-breeder respondents in East Taniwel District, West Seram Regency. The research method is a survey method and the sample villages and respondents are determined based on the purposive sampling method. The variables observed consisted of: the ability to detect lust, determining the time of mating after parturition and maternal productivity (including; age at first marriage, pregnancy rate, birth rate, postpartum mating and pre-weaning child deaths. The results showed that 86.66% of respondents were farmer farmers in East Taniwel District has the knowledge, ability and skills in detecting postpartum heat in the medium category (able to name 2-3 categories) and 100% do not have the knowledge and ability in determining the right mating time after parturition. The potential productivity of Bali cows is age first mating 18.2 ± 1.16, pregnancy rate 88.01%, birth rate 98.85%, postpartum mating 4.8 ± 0.8, and pre-weaning mortality 8.90%.

Breeding profile and reproductive performance of beef cattle kept by smallholder farmers in Monta District, Bima Regency, Indonesia

This study investigates beef cattle's breeding profile and reproductive performance kept by smallholder farms in Monta District, Bima Regency, West Nusa Tenggara Province. In-depth interviews were conducted with fifty smallholder farmers, and observations were made on ninety-eight cows. Data on farmers' demographics, breeding profiles, management, and reproductive performance were collected and analyzed using descriptive analysis. The average age of the farmers was 44.32±6.61 years, with an average livestock farming experience of 33.14±6.17 years and an average cattle ownership of 5.02±3.96 heads. Most farmers (98.0%) engaged in beef cattle farming as a supplementary business for savings and insurance purposes. Interestingly, none of the smallholder farmers were members of livestock groups or had received any formal beef cattle farming training. The study's findings indicate promising results concerning beef cows' management and reproductive performance. The observed parameters include the average age of the first estrus at 26.03±5.01 months, the first mating age at 26.55±5.02 months, and the first calving age at 36.76±5.02 months. The average calf weaning age was 3.93±1.11 months, and the postpartum mating interval was 4.20±0.90 months. The cows exhibited an average of 1.59±0.49 services per conception, with an average days open period of 4.61±1.10 months. The calving interval was found to be 13.71±1.06 months. Moreover, the cow reproductive index was recorded at 0.88±0.07 head/year, indicating commendable management practices and reproductive performance. In conclusion, this study reveals that productive-age farmers with livestock experience engage in beef cattle farming as a supplementary business for savings. The findings suggest that beef cattle management and performance are commendable, considering the favorable calving interval and cow reproductive index.

Gayo horse reproduction performance as local animal genetic resources in Southeast Aceh, Aceh Province

The objective of this research was to analyze the reproductive performance of the Gayo horse as an animal genetic resources in Southeast Aceh. This research has conducted in Southeast Aceh. The study used a survey method. The choice of research location has done intentionally (purposive sampling). The total population of Gayo horses scattered in Southeast Aceh currently is 102 tails and the number of samples taken in this study is 24 individuals with the minimum requirement that respondents keep horses that have at least given birth 2 times. The required data in this study were the reproductive performance characteristics of Gayo horses including (1) estrus cycle, (2) length of time in estrus, (3) first mating age, (4) gestation period, (5) foaling interval and (6) postpartum mating. The data obtained from this research that the average length of estrus cycle in the range of 21-25 days with an average of 22.58±1.18 days, the length of time in estrus varied in the range of 4-17 days with an average 8.92±3.35 days, while age at first mating ranged from 24-36 months with an average of 30.25±5.15 months, furthermore gestational age had an average of 333.63±4.83 days with a range of 326-345 days, foaling interval is 470,25±11.86 days with a range of 458-480 days and postpartum mating an average of 136.63±7.03 days with a range of 122-150 days. The data obtained identified that the reproductive performance of Gayo horses in Southeast Aceh Regency is in normal condition.

Reproductive performance of buffalo cows (Bubalus bubalis) at small farms in Sukoharjo Regency, Central Java, Indonesia

<p class="MDPI17abstract"><strong>Objective: </strong>The buffalo population in Indonesia has generally increased in the last decade except in some regencies. This is because the farming activity is majorly dominated by smallholder farmers. Therefore, this study aims to obtain information about the reproductive performance of buffalo cows in small farms at Sukoharjo Regency, Central Java, Indonesia. It was conducted from April-September 2021 using a total of 33 respondents with 62 buffalo cows spread in Tawangsari, Sukoharjo, Mojolaban, Grogol, Baki, and Kartasura.</p><p class="MDPI17abstract"><strong>Methods: </strong>The research method used is a survey method with the technique of determining the location and sampling used is purposive sampling. The materials used were buffalo farmers as respondents spread across 6 sub-districts. Mating system was natural mating. The data was collected from this sample include gestational age, age at first calving, service per conception (S/C), calving interval (CI) and post partum mating. The data obtained are then recorded and tabulated for the calculation of the average and standard deviation which is then presented as a percentage based on each parameter.<strong></strong></p><p class="MDPI17abstract"><strong>Results: </strong>The results showed that the average length of gestation was 324.2±29.0 days, age at first calving 3.7±0.9 years, service per conception 1.1±0.4 times, calving interval 467.1±85.8 days, and post-partum mating was 128.5±69.3 days.<strong></strong></p><p><strong>Conclusions: </strong>It can be concluded that the reproductive performance of buffalo cows in smallholder farms at Sukoharjo Regency is relatively good.</p>

Milk Production and Reproductive Performance of Holstein Friesian Dairy Cattle in the Working Area of ​​South Bandung Pangalengan Animal Husbandry Cooperative (KPBS) Bandung Regency

Increasing the population and productivity of dairy cows is one of the way to boost national milk production capacity. This study was aimed to determine and investigate the performance of milk production and reproduction of Friesian Holstein (FH) dairy cows in the Working Area of KPBS Pangalengan, Bandung Regency. This research used FH dairy cows with a complete milk production and reproduction record. In total, there were 90 heads of cows in the Pangalengan District and 178 heads of cows in the Kertasari District. This study used the survey method to collect the data. A Multistage Random Sampling Method was used in this research. Sampling was carried out in two stages, the first stage was sampling from two sub-district locations in Pangalengan and Kertasari Districts. In the second stage, two villages were selected from each district: Pangalengan and Margamukti Villages in Pangalengan District, and Santosa and Tarumajaya Villages in Kertasari District. Farmers and their cows were chosen by simple random sampling. Data on milk production and reproduction records were obtained from farmers and their cows through direct observation and interviews related to the identity of the cattle they owned. The results showed that the average performance of the milk production characteristics of FH dairy cows was: an average milk production of 3779.2±497.48 liters/head/day, an average length of lactation of 307.8±31.30 days, and an average dry period of 72.14±21.43 days. The lactation period had a significant effect (P<0.05) on milk production. The peak of milk production was reached in the fourth lactation period. The mean of reproductive traits consisting of the first postpartum mating was 77±20.5 days, the average length of days open was 96±26.4 days, the average number of services per conception was 1.8±0.85 times, and the average calving interval was 381.05± 24.5 days. In conclusion, FH dairy cows raised in Pangalengan and Margamukti Villages, Pangalengan District, Santosa and Tarumajaya Village, Kertasari District, in the working area of Pangalengan KPBS during the Covid-19 pandemic indicated a fairly good performance of milk production and reproduction characteristics.

The primipara reproductive performance of Bali cows with natural mating compared to artificial insemination

This study was conducted to observe Bali cows’ primipara reproductive performance between natural mating and artificial insemination. Fifty Bali cows owned by 44 farmers in Central Lombok Regency, West Nusa Tenggara Province, were used as the research sample at the first mating; 19 cows were subjected to natural mating (NM) and 31 cows to artificial insemination (AI). Farmer’s profile data, rearing system, and reproductive performance (the age of puberty, the first mating, gestation period, postpartum estrus, postpartum mating, and calving interval) were obtained from the farmer’s interview and inseminator record. An independent sample t-test was performed to analyze the differences in reproductive performance between NM and AI groups. The results showed that there were significant differences (P<0.05) in postpartum estrus (48.94 ± 12.75 vs. 82.74 ± 26.51 days), postpartum mating (59.00 ± 14.00 vs. 85.64 ± 25.45 days), and calving interval (348.57 ± 18.20 vs. 393.19 ± 31.05 days). In conclusion, Bali cows’ reproductive performance in primipara with natural mating is better than artificial insemination. So recommended that for the first mating, it is better to have a natural mating.

Effect of Age at First Calving on Milk Production and Reproductive Performance of Indonesian Holstein Dairy Cattle

The purpose of this study was to determine the milk production and reproductive performance of dairy cattle in groups of different ages at first calving and to elucidate the effect of age at first calving on milk production and calving interval of Indonesian Holstein dairy cattle. The observation method use in this study. Records of 80 dairy cows which were born in Indonesia and had the age at first calving range of 23-32 months were used as the materials. Cows were divided into two groups based on age at first calving (AFC). Group I was cows with age at first calving of 23-27 months and group II with age at first calving of 28-32 months. The parameters observed were the total milk yield, calving interval, post-partum mating, interval from calving to conception, and service per conception. To compare data between two groups, the t-tests and descriptive analysis were used. The results showed that the total milk yield, calving interval, postpartum mating, interval from calving to conception, and service per conception in the group I did not have a significant difference from the group II. The linear regression analysis showed that the age at first calving had a weak negative effect on the total milk yield, and the age at first calving had a weak positive effect on the calving interval. In conclusion, the difference in the age at first calving did not provide a different performance on milk production and reproduction of dairy cattle

Kemampuan Riil dan Tertaksir Sifat Produksi dan Reproduksi Sapi Perah di KAN Jabung

Production and reproductive characteristics affect the productivity of dairy cows in producing milk. The repeatability value uses to estimate the most probable producing ability (MPPA), which helps estimate the productivity of dairy cattle in the subsequent lactation period. The study aimed to determine the actual ability and accuracy of MPPA based on dairy cows’ reproductive and production characteristics. Secondary data from 124 Friesian Holstein dairy cows under the auspices of the Jabung Agro Niaga Cooperative, Malang Regency. The t-test compares data from the 3rd lactation period and the MPPA value. T-test results between MPPA and 3rd lactation of milk production 0.436; lactation length 0.387; dry period 0.051; DO 0.3; and CI 0.243. The five traits are more than 0.05, so they can be stated to be significantly the same as the real value in 3rd lactation. The results of the t-test for postpartum mating are 0.04 and S/C 0.002, significantly different from the actual value in the third lactation because it is less than 0.05. Based on the research results, the MPPA method accurately estimates the characteristics of lactation length, 305 days of milk production, dry period, days open (DO), and calving interval (CI).

The effect of BCS, PPM, S/C and days open on the calving interval of dairy cows at PT. Ultra Peternakan Bandung Selatan

The calving interval is a key factor in the dairy industry that determines overall milk production and heavily influences management and the environment. This study aims to determine the effect of body condition score (BCS), post-partum mating (PPM), service per conception (S/C), and days open (DO) on calving interval (CI) for dairy cows at PT. Ultra Peternakan Bandung Selatan (UPBS). A total of 99 Friesian Holstein samples were used during their fourth lactation period. The reproduction traits were collected from the UPBS dataset. A linear regression analysis was carried out to evaluate the effect reproduction traits of CI. Furthermore, CI was used as the dependent variable (Y), while BCS, PPM, S/C, and DO were used as the independent (X). The result showed that BCS, PPM S/C, and DO significantly influenced CI (P<0.05). The regression equation obtained in Y = 244,243 – 13,710 X1 + 1,202 X2 + 12,563 X3 + 0,730 X4 + e with a coefficient of determination (R2) of 92,8%. It was concluded that BCS, PPM, S/C, and DO affected the CI of dairy cows at the PT. UPBS.

FAKTOR-FAKTOR YANG MEMPENGARUHI CALVING INTERVAL SAPI PERANAKAN ONGOLE (PO) DI DESA WAWASAN KECAMATAN TANJUNGSARI KABUPATEN LAMPUNG SELATAN

The purpose of this research was to know the factors and factors value affecting calving interval of Ongole Grade (PO) cattle in Wawasan Village, Tanjungsari District, South Lampung Regency. The Research was conducted on 20 December 2019 – 15 January 2020 using 100 PO cattle in Wawasan Village, Tanjungsari District, South Lampung Regency. This research used census method. Data was analyzed by linear regression using SPSS program. The result showed that calving interval of PO cattle in Wawasan Village, Tanjungsari District, South Lampung Regency was 23.17 ± 6.05 month. The factors that affect the calving interval were, at the farmer level, the breeding experience was negatively associated with a factor of 0.384. At the livestock level, postpartum mating was positively associated with a factor of 0.755 and weaning age was positively associated with a factor of 0.650. At the inseminator level, thawing time is positively associated with a factor of 0.813.&#x0D; &#x0D; Keywords: Calving interval, Factor and factor value, Ongole Grade (PO) cattle

Comparison of Aceh cow’s performance on different mating systems at BPTU HPT Indrapuri, Aceh Province, Indonesia

This research aimed to compare Aceh cow’s performance on different mating systems at BPTU HPT Indrapuri, Indonesia. This research uses 202 Aceh cows with varying systems of mating; natural mating (164 cows), and artificial insemination (AI; 38 cows). Cow’s performance data included birth weight, postpartum mating, calving interval, weaning weight, Cow Reproduction Index (CRI), and Cow Production Index (CPI), obtained from the recording in 2014-2019 and calculation. This research uses the Oneway Anova test to analyze the cow’s performance between mating systems. The results of the cow’s performance included birth weight, postpartum mating, calving interval, weaning weight, CRI, and CPI for natural mating system were 14.32±1.41 kg, 265.61±260.0 days, 558,.21±260.07 days, 54.32±19.32 kg, 0.69 calf/cow/year and 37,48 kg/cow/year respectively, while for AI system were 14,98±1,38 kg, 289.34±285,.06 days, 581.94±285.06 days, 59.10±21.83 kg, 0.70 calf/cow/year dan 41.37 kg/kg/cow/year. The results showed that the performance of the Aceh cows with natural mating dan artificial insemination was relatively the same.

Performances of Bali cow kept by the palm oil farmers in Rokan Hulu, Riau

The development of the beef cattle population in Indonesia can be done by increasing the cows’ performance keeping by oil palm farmers. The research aimed to study Bali cows’ production system and performance maintained by oil palm farmers in Karya Mulya Village, Rambah Samo District, Rokan Hulu Regency, Riau. Fifteen farmers as respondent with 33 of their Bali cows were the subjects of observation. This research was conducted using the interview method, focused on the production system, body size, and reproductive performance. Data were analyzed descriptively, quantitative, and qualitative. The study results on body size showed that the Bali cows had a chest circumference of 156.68±7.07 cm, shoulder height 112.73±8.86 cm, absolute body length 113.77±5.26 cm, relative body length 105±6.89 cm, body weight 253.65±28.64 kg, and body condition score 2.91±0.50. Reproductive performance includes the calving interval is 376.96±77.65 days, weaning time is 7.74±1.16 months, postpartum estrus 72.00±36.81 days, postpartum mating 72.00±36.81 days, service per conception 1.23±0.8, calf mortality 6.25%, calf weaning weight at 205 days is 97.59±22.88 kg, cows reproductive index 0.96 ± 0.26 and productivity 68.23 ± 46.89. It concluded that Bali cows raised by oil palm farmers in Rokan Hulu, Riau had good performance and body size.

Reproductive management and performances of Bali cow kept by smallholder farmers level with different production systems in South Konawe Regency, Indonesia

This research aims to determine Bali cows’ reproductive management and performances, kept by smallholder farmers with intensive and semi-intensive production systems in South Konawe Regency. A total of 55 farmers and 110 Bali cows was interviewed and observed. The data was captured consists of farmers’ characteristics, reproductive management, and reproductive performances. An independent sample t-test analyzed the data. The farmers with intensive and semi-intensive production systems could detect the estrus well (69.57 and 59.09%) and mated by artificial insemination (AI) (70.83 and 86.11%). There was a significant difference (P <0.05) related to the first estrus age (1.98±0.82 vs. 1.92±0.18 years), the first mating age (2.84±0.23 vs. 2.77±0.34 years), service per conception with natural mating and AI (1.00±0.00 vs. 1.20±0.42 and 1.70±0.76 vs. 1.44±0.57 times). There were no significant differences in the first calving age, gestation length, postpartum estrus, postpartum mating, weaning age, calving interval, and cow reproduction index. The pre-weaning mortality and calf crops were 6.25 and 9.68%; 76.79 and 71,70%. To conclude our findings, the farmers in South Konawe Regency carry out reproductive management well. Bali cows’ reproductive performance with an intensive system is better than the semi-intensive system based on the calf crop.

Morphometric Characteristics and Reproductive Performance of Pasundan Cattle in the North Prianganese and Southern South Coast Region

This study aims to determine the morphometric characteristics and reproductive performance of Pasundan cows which are extensively reared on smallholder farms in the coastal areas of the south (Garut, Cianjur, and Sukabumi) and North Priangan (Bogor, Purwakarta, and Sumedang). This research is descriptive research with a qualitative approach. Production characterization was carried out using a simple method, namely by measuring the body surface including shoulder height, chest circumference, body length, and bodyweight of Pasundan cattle. Meanwhile, the reproductive characteristics discuss puberty, service per conception (S / C), conception rate (CR), calving rate, postpartum estrus, postpartum mating, days open (DO), calving interval (CI), calving birth weight, and calving rate. calves weight growth. Data were collected by survey, the location was determined by purposive sampling in the area of the seed source with the largest population and the random sampling of livestock was determined purposively as many as 30 Pasundan cows from each region. Data were analyzed using quantitative descriptive analysis. The results showed that the morphometric characteristics of Pasundan cattle included mean shoulder height of 123.0 0 ± 3.06a cm VS 121.34 ± 2.82a in males and 110.34 ± 2.78 vs 108.00 ± 2.14a in females. Body length 115.74 ± 3.30 cm VS 115.34 ± 2.97acm in males and 112.67 ± 2.97cm VS 109.67 ± 1.82 cm in females. Chest circumference 145.67 ± 2.97cm VS 142.67 ± 2.67cm bulls and 136.00 ± 2.95cm VS 131.00 ± 2.92cm in females, Bodyweight 268.0 ± 17.00 kg VS 246.00 ± 7.00a for males and 215.0 ± 15.00 kg VS 194.00 ± 54.00kg in females. As for reproductive characteristics, it shows puberty of 20-24 months., S / C 1.4 - 1.6, Conception rate 65-70%, calving rate 62.5-65%, Postpartum Estrus 50-60 days, postpartum mating 72-104 days, day -open 94-126 days and a calving interval of 12-14 months. Calves' birth weight was 18.0 - 18.5 kg and daily body weight gain ranged from 0.48 to 0.50 kg. It was concluded that the morphometric characteristics and reproductive performance of Pasundan cattle in the Pesisir Selatan area were better than North Priangan.

A deterministic simulation model for the evaluation of reproductive performance in Thoroughbred mares

The objective of the present study was to develop a deterministic simulation model for evaluating the reproductive performance of Thoroughbred mares. As an application, the model was used to estimate the herd level asymptotic foaling percentage (AFP) for evaluating the performance of mares in stabilized mare herds using the convergent method for estimating a steady-state distribution of mares. In this model, it was assumed that the mares were mated only during the breeding season. The effects of early pregnancy loss and fetal loss on reproductive performance were investigated. The sensitivities of AFP to changes in conception rate (CR), early pregnancy loss rate (EPLR), fetal loss rate (FLR), and postpartum mating interval (PMI) were examined. Furthermore, the AFPs were compared for two types of postpartum first mating schedules: mating during the first postpartum estrus cycle (foal heat) and first mating during the subsequent cycle. The results indicated that AFP was sensitive to changes in EPLR, FLR, and CR. The comparison of the two types of postpartum first mating schedules showed that AFP after foal heat mating was higher than after the subsequent estrus mating even with the decrease in reproductive parameters caused by foal heat mating in the model. In addition, even if mares did not mate during foal heat, AFP could be improved by shortening the estrus cycle with the administration of PGF2α.

KINERJA KAMBING SABURAI YANG DIPELIHARA PETERNAK DI DESA GISTING ATAS KECAMATAN GISTING KABUPATEN TANGGAMUS

The aim of this research was to determine the performance of Saburai goats reared by farmer in Gisting Atas Village, Gisting District, Tanggamus Regency. These research was conducted in June until August 2019 in Saburai goat breeding group at Gisting Atas Village, Gisting District, Tanggamus Regency, Lampung Province. The research used 14 farmers as respondents and their Saburai goats with various age levels, namely at kid, young goat, and dam. The research method used was direct interviews and observations in the field which include collecting farmer profile data, while livestock performance data was observed using data recording of the animal. The data was analyzed by descriptive analysis. The results showed that 100% of farmers motivation was to increase their income. Each farmer had 10 tail of goat in average. The average performance of goats were kidding intervals of 310.43±49.70 days, litter size of 1.88±0.40 tails, postpartum oestrus of 61.58±9.72 days, postpartum mating of 149.11±51,19 days, birth weight of 2.83±0.11 kg, weaning weight of 11.28 ±1.36 kg, and yearling weight of 25.98±2.93 kg. The Conclusion of this research was that the performance of Saburai goats that are kept by farmers has decreased if compared with performance of many years before current research.&#x0D; &#x0D; Keywords : Gisting Atas, Performance, Saburai Goat, Tanggamus Regency.

Reproductive Performance of Crossbreed Goats Etawah in Kulon Progo Regency

The purpose of this research is to know the effect of age on reproductive performance of Crossbreed goat etawah in Kulon Progo regency in a productive age. The object of this research is the respondents and their Goats as the research material that is the Doe Crossbreed goat Etawah which is 1.5 until 3 years old (poel 2 to 3 pairs). The method used in this research is a survey through an interview using a questionnaire. Location is determined by population level that is population high, middle and low in Sub Girimulyo and Samigaluh. The observed reproduction performance was litter size, postpartum estrus, postpartum mating, service per conception and lambing interval. The research data is conducted by Independent T-test. The results showed that the litter size, postpartum estrus, postpartum mating, service per conception and lambing interval were not significantly different between the age of poel 2 and poel 3. The litter size poel 2 and 3 were 1.65+0, 54 and 1.72±0.55. Postpartum estrus goat poel 2 is 4.37±1.23 and goat poel 3 is 4.46±1.19. Postpartum mating goats poel 2 and 3 are 4.38±1.23 and 4.46±1.19. The number of lambing intervals of crossbreed goat etawah poel 2 and 3 respectively were 9.54±1.35 and 9.60±1.28. Service per conception of crossbreed goat etawah poel 2 equal to 1.28±0.65, poel 3 equal to 1.22±0.55. It can be concluded that the reproductive performance of crossbreed goat etawah at the productive age of 1.5 to 3 years is not affected by age.

Lactation Characteristic of Etawah Crossed Breed Goats Under Intensive Management

The study aimed to describe lactation characteristic of Etawah Crossed Breed goats raised under intensive management. The study located in BBPTU HPT Baturraden, Purwokerto, used 27 female pregnant goats, at 24 to 27 months old. The goats were managed followed standard operating procedure of the research institute. The data consisted of body size and body weight, colostrum and milk yield, lactation period and reproductive performance. The results showed the average of daily milk yield, lactation period, total milk and colostrum production in first lactation were 960±340 mL/day, 157±41 days, 114,720±68,900 mL and 415±240 mL/day. The proportion of monthly milk production from initial lactation to dry off were 21.27, 22.17, 20.18, 17.29, 12.52, 9.13, and 5.65% of total lactation yield, respectively. Peak production ranged from first to second months of lactation, the highest was in the week 4th, averaged of 1080 mL/day. Production persistency was 66.39%. The rate of increase toward peak was 5.60%/week and rate of decline from peak was -3.92% of milk yield in the previous week. Trend equation of lactation curve was Y = 8412.7 –233.65 x. Means period of postpartum mating, service per conception and body condition score were 88.7±39.2 days, 1.2 and 3.45, respectively. There was no correlation between postpartum mating, body condition score and milk production. The study concluded that Etawah Crossed Breed goat under intensive management had short lactation period, early peak production, low persistency. The dry period was estimated 3 months and pregnancy occurred after peak production.

The correlation between blood metabolic and reproductive performance on the Holstein-Friesian crossbred dairy cows

This research was conducted to investigate the correlation between blood metabolic and reproductive performance on the Holstein-Friesian crossbred. Twenty cows on the second to the third lactation were used in this research. The blood was collected through a jugular vein, eight hours after feeding; it was used for investigating serum protein, glucose, and estradiol. The reproduction including service per conception (S/C), postpartum mating (PPM), and calving interval (CI). The data were analyzed using the Pearson Correlation Model. The average of serum protein, glucose, and estradiol concentration were 7.17±0.86 g/dl; 56.14±4.56 mg/dl; and 4.97±0.75 pg/mL respectively. The average of PPM, CI, and S/C were 150.40±69.85 d; 433.60±106.01 d; and 1.6±0.75 t respectively. The results showed that the correlation coefficient of the estradiol on serum protein and serum glucose were 0.309 and 0.329 respectively. The correlation coefficient of serum protein on PPM, S/C, and CI were -0.096; –0.333; -0.134 respectively. While that of serum glucose on PPM, S/C, and CI were -0.109; –0.327; and -0.309 respectively. Serum protein and glucose had a negative correlation on S/C, PPM and CI.

Pengaruh waktu perkawinan pasca beranak terhadap performa produktivitas sapi induk pada kondisi peternakan rakyat

The mating of the beef cow is important factors in beef cattle breeding. The research aims to obtain the mating time of the cow after calving in smallholder farmers. The study was conducted on Pasuruan and Probolinggo Regency, East Java Province. Observations were on productivities performance in Ongole-cross breed cows in smallholder farmers from 2010 to 2013. The study used a randomized block design with four treatment groups postpartum mating, namely Group I ( 120 days. The parameters measured included postpartum anoestrus interval/PPAI, service per conception (S/C), conception rate (CR), calf weaning time, and calving interval/CI, percentage of calf birth and death. Data were analyzed using ANOVA; followed by the Duncan test using SPSS. The values of PPAI in PO cows showed very significant differences (P<0.01) between the mating time groups. Calving Interval in group IV showed the highest value of 499.0±123.4 days (P <0.05) compared with group I, II, III. The highest CR value was in group III (79.45%) than I, II and IV. The highest calf mortality was in the group I (16.67%) than in group II, III and IV. The percentage of calf births in groups I, II, III, and IV are the same, but the lowest calf weaning time of obtained in group II mating was 92.8±22.5 (P<0.01) than group I, III and IV. In conclusion, the most efficient mating time was 60-<90 days after calving.