Č. Radović, M. Gogić, D. Radojković, V. Zivkovic, N. Stojiljković, N. Parunović, R. Savić
The aim of this study was to determine the influence of the applied method of the quality carcass in 201 descendants, both sexes (n=108 male castrated animals and n=93 females), of studied boar-sires. For the determination of the meat yield (JUS1) and the share of meat (JUS 2) in carcass sides, on the basis of the performed measurements, tables for meat pigs, which are an integral part of the Rulebook on the quality of slaughtered pigs and categorization of pork meat (OG SFRY, 1985), were used. Share of meat (EC 94 and EC 06) was determined on cooled left carcass sides by method of partial dissection (according to methodology recommended by EU- Walstra and Merkus, 1996). Research was carried out on pig farm and in experimental slaughterhouse of the Institute for Animal Husbandry, Belgrade-Zemun. Housing, care and nutrition of animals were in accordance to breeding technology in investigated herd. The average share of meat determined by the application of the Rulebook (JUS2) was 43.58% with a lower absolute variation compared to the EU regulation from 1994 (EC 94; 53.56%) and from 2006 (EC 06; 56.55%). The estimated lean meat content by the application of the Rulebook (JUS 2) was by 9.98% lower compared to the EC 94 regulation and by 12.97% lower compared to EC 06. If we are talking about the selection of offspring for breeding, if we consider only the estimated leanness, we see that within the Landrace (L) breed we have high and very significant (P<0.001) differences between the sires for the assessed meat content according to EC 94 and EC 06. By implementing new methods of assessment of lean meat content (EC 94 and EC 06), a higher share of meat (9.98% respectively 12.97%) was determined compared to the Rulebook (1985). This research indicates the necessity of changing the current method for the establishment of meat content of pigs in the Republic of Serbia.
{"title":"The influence of boar breed and applied method on the meat content","authors":"Č. Radović, M. Gogić, D. Radojković, V. Zivkovic, N. Stojiljković, N. Parunović, R. Savić","doi":"10.2298/bah2001017r","DOIUrl":"https://doi.org/10.2298/bah2001017r","url":null,"abstract":"The aim of this study was to determine the influence of the applied method of\u0000 the quality carcass in 201 descendants, both sexes (n=108 male castrated\u0000 animals and n=93 females), of studied boar-sires. For the determination of\u0000 the meat yield (JUS1) and the share of meat (JUS 2) in carcass sides, on the\u0000 basis of the performed measurements, tables for meat pigs, which are an\u0000 integral part of the Rulebook on the quality of slaughtered pigs and\u0000 categorization of pork meat (OG SFRY, 1985), were used. Share of meat (EC 94\u0000 and EC 06) was determined on cooled left carcass sides by method of partial\u0000 dissection (according to methodology recommended by EU- Walstra and Merkus,\u0000 1996). Research was carried out on pig farm and in experimental\u0000 slaughterhouse of the Institute for Animal Husbandry, Belgrade-Zemun.\u0000 Housing, care and nutrition of animals were in accordance to breeding\u0000 technology in investigated herd. The average share of meat determined by the\u0000 application of the Rulebook (JUS2) was 43.58% with a lower absolute\u0000 variation compared to the EU regulation from 1994 (EC 94; 53.56%) and from\u0000 2006 (EC 06; 56.55%). The estimated lean meat content by the application of\u0000 the Rulebook (JUS 2) was by 9.98% lower compared to the EC 94 regulation and\u0000 by 12.97% lower compared to EC 06. If we are talking about the selection of\u0000 offspring for breeding, if we consider only the estimated leanness, we see\u0000 that within the Landrace (L) breed we have high and very significant\u0000 (P<0.001) differences between the sires for the assessed meat content\u0000 according to EC 94 and EC 06. By implementing new methods of assessment of\u0000 lean meat content (EC 94 and EC 06), a higher share of meat (9.98%\u0000 respectively 12.97%) was determined compared to the Rulebook (1985). This\u0000 research indicates the necessity of changing the current method for the\u0000 establishment of meat content of pigs in the Republic of Serbia.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121634811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Goran Vučković, T. Bobić, P. Mijić, Mirna Gavran, K. Potočnik, V. Bogdanović, V. Gantner
Aiming determination of the variability of production traits (daily milk yield and composition) and microclimate parameters (ambient temperature and humidity) in the barns; as well as the correlation between the analyzed groups of traits, 1,636,192 test-day records from Simmentals and 1,275,713 test-day records from Holsteins were analysed. Performed analysis indicate high variability of production traits due to cow?s breed, parity as well as breeding region. Also, high variability of microclimate parameters in the barns due to season and breeding region was found. Furthermore, statistically highly significant (p < 0.001) correlations between the production traits and microclimate parameters were determined. Finally, the negative effect of inadequate microclimate on daily milk production was determined in both breeds in all breeding regions. Since genetic evaluation and selection of dairy cattle for heat resistance is only long-term method for heat stress managing, determined effect will be taken into account in the statistical model for estimation of genetic parameters and breeding values.
{"title":"Analysis of production traits and microclimate parameters on dairy cattle farms","authors":"Goran Vučković, T. Bobić, P. Mijić, Mirna Gavran, K. Potočnik, V. Bogdanović, V. Gantner","doi":"10.2298/bah1904323v","DOIUrl":"https://doi.org/10.2298/bah1904323v","url":null,"abstract":"Aiming determination of the variability of production traits (daily milk\u0000 yield and composition) and microclimate parameters (ambient temperature and\u0000 humidity) in the barns; as well as the correlation between the analyzed\u0000 groups of traits, 1,636,192 test-day records from Simmentals and 1,275,713\u0000 test-day records from Holsteins were analysed. Performed analysis indicate\u0000 high variability of production traits due to cow?s breed, parity as well as\u0000 breeding region. Also, high variability of microclimate parameters in the\u0000 barns due to season and breeding region was found. Furthermore,\u0000 statistically highly significant (p < 0.001) correlations between the\u0000 production traits and microclimate parameters were determined. Finally, the\u0000 negative effect of inadequate microclimate on daily milk production was\u0000 determined in both breeds in all breeding regions. Since genetic evaluation\u0000 and selection of dairy cattle for heat resistance is only long-term method\u0000 for heat stress managing, determined effect will be taken into account in\u0000 the statistical model for estimation of genetic parameters and breeding\u0000 values.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125644204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The aim of this study was to determine the effect of prebiotics in the diet of piglets after weaning on the increase in the average weight of experimental animals between female (?) and male (?) piglets, dynamically by weeks of experiment, as well as on the presence of Escherichia coli in faeces. The experiment included piglets at weaning, aged about 26 days. The F1 generation was used, which was created by crossing Landrace sows and Pietren boars. The piglets were fed for 56 days (8 weeks). Four groups were formed, each group was composed of 10 piglets (5 females and 5 males) with different concentrations of prebiotics and controls, in two replicates, a total of 100 experimental animals. Feed mixtures consisting of the same nutrients were used in the diet. Control groups (OA and OB) were fed with ordinary feed mixture, without the addition of additives, groups (IA and IB) with the addition of Bio-Mos prebiotics, in a concentration of 0.1%, groups (II-A and II- B) with 0.2%, groups (III-A and III-B) with 0.3% and groups (IV-A and IV-B) were fed with the addition of prebiotics in a concentration of 0.4%. It was concluded that the differences observed in the average weight between ? and ? piglets in any measurement period were not statistically significant. However, the best results in terms of average weight were given by the highest used concentrations of prebiotics in food, 0.4% and 0.3%. The preparation had a positive effect in terms of reducing the number of Escherichia coli bacteria in the digestive tract of piglets in all treatment groups by 42 to 320 times.
{"title":"Influence of prebiotics in pigs nutrition on body weight and content of Escherichia coli in feces","authors":"Mirjana Delić-Jović","doi":"10.2298/bah2103183d","DOIUrl":"https://doi.org/10.2298/bah2103183d","url":null,"abstract":"The aim of this study was to determine the effect of prebiotics in the diet\u0000 of piglets after weaning on the increase in the average weight of\u0000 experimental animals between female (?) and male (?) piglets, dynamically by\u0000 weeks of experiment, as well as on the presence of Escherichia coli in\u0000 faeces. The experiment included piglets at weaning, aged about 26 days. The\u0000 F1 generation was used, which was created by crossing Landrace sows and\u0000 Pietren boars. The piglets were fed for 56 days (8 weeks). Four groups were\u0000 formed, each group was composed of 10 piglets (5 females and 5 males) with\u0000 different concentrations of prebiotics and controls, in two replicates, a\u0000 total of 100 experimental animals. Feed mixtures consisting of the same\u0000 nutrients were used in the diet. Control groups (OA and OB) were fed with\u0000 ordinary feed mixture, without the addition of additives, groups (IA and IB)\u0000 with the addition of Bio-Mos prebiotics, in a concentration of 0.1%, groups\u0000 (II-A and II- B) with 0.2%, groups (III-A and III-B) with 0.3% and groups\u0000 (IV-A and IV-B) were fed with the addition of prebiotics in a concentration\u0000 of 0.4%. It was concluded that the differences observed in the average\u0000 weight between ? and ? piglets in any measurement period were not\u0000 statistically significant. However, the best results in terms of average\u0000 weight were given by the highest used concentrations of prebiotics in food,\u0000 0.4% and 0.3%. The preparation had a positive effect in terms of reducing\u0000 the number of Escherichia coli bacteria in the digestive tract of piglets in\u0000 all treatment groups by 42 to 320 times.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124821063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Correction of the paper "Effect of year, lambing season, sex and birth type on early performance in MIS lambs" by Bogdan Cekic, Dragana Ruzic-Muslic, Nevena Maksimovic, Violeta Caro-Petrovic, Krstina Zeljic Stojiljkovic, Ivan Cosic, Radmila Beskorovajni, published in Biotechnology in Animal Husbandry vol. 37 (4), pages 255-262, 2022 (DOI: 10.2298/BAH2104255C): In Tables 1 and 2 instead of BW90, kg correct is BW60, kg. In Table 1 the values of statistical parameters for ADG2, g and ADG3, g are changed.
{"title":"Correction of the paper \"Effect of year, lambing season, sex and birth type on early performance in MIS lambs\"","authors":"E. Editoral","doi":"10.2298/bah2201080e","DOIUrl":"https://doi.org/10.2298/bah2201080e","url":null,"abstract":"Correction of the paper \"Effect of year, lambing season, sex and birth type\u0000 on early performance in MIS lambs\" by Bogdan Cekic, Dragana Ruzic-Muslic,\u0000 Nevena Maksimovic, Violeta Caro-Petrovic, Krstina Zeljic Stojiljkovic, Ivan\u0000 Cosic, Radmila Beskorovajni, published in Biotechnology in Animal Husbandry\u0000 vol. 37 (4), pages 255-262, 2022 (DOI: 10.2298/BAH2104255C): In Tables 1\u0000 and 2 instead of BW90, kg correct is BW60, kg. In Table 1 the values of\u0000 statistical parameters for ADG2, g and ADG3, g are changed. <br><br><font color=\"red\"><b> Link to the corrected article <u><a href=\"http://dx.doi.org/10.2298/BAH2104255C\">10.2298/BAH2104255C</a></b></u>","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132729395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dusica Ostojic-Andric, S. Hristov, B. Stanković, D. Nikšić, A. Stanojković, L. Samolovac, M. Marinković
In the last decades, there has been a trend present in the world to increase the size of dairy herds while increasing the yield of milk per head. In addition to environmental and economic benefits, this trend carries certain risks for the welfare of cows because in conditions of increased agglomeration of cattle the possibility of spreading of pathogens is also increased, there are less opportunities for adequate control and cows are exposed to greater selection and production stress. Research of the relationship between herd size and welfare quality parameters is still not sufficient to make relevant conclusions. Starting from that, the aim of this study, conducted in Serbia, is to examine the influence of herd size on parameters related to providing good feeding and housing conditions as important segments of the overall welfare of dairy cows. The assessment of given welfare parameters was done by Welfare Quality? Assessment Protocol for Cattle (2009) on 16 dairy farms of different herd sizes (large, medium and small) and housing management. The results indicate that there are significant variations in welfare indicators in each of the observed groups, which is why the size of the herd cannot be taken as a parameter that explicitly determines the quality of welfare. However, individual observation and comparison of welfare parameters between groups indicate that small herds in our production conditions could be identified as the greatest risks to the welfare of cows. In small herds, the highest share of cows of poor (4.62%) and fattened condition (8.76%) was found, as well as the lowest freedom of movement because cows on small farms are mostly reared in a tied system. Average values of indicators: lying down time (6.24s), frequency of collisions with equipment (13.25%) and high dirt contamination of cows (65.6-89.8%) further emphasize the issue of providing comfort in small herds.
{"title":"The effect of herd size on dairy cows' welfare quality - provision of good feeding and housing","authors":"Dusica Ostojic-Andric, S. Hristov, B. Stanković, D. Nikšić, A. Stanojković, L. Samolovac, M. Marinković","doi":"10.2298/bah2201001o","DOIUrl":"https://doi.org/10.2298/bah2201001o","url":null,"abstract":"In the last decades, there has been a trend present in the world to increase\u0000 the size of dairy herds while increasing the yield of milk per head. In\u0000 addition to environmental and economic benefits, this trend carries certain\u0000 risks for the welfare of cows because in conditions of increased\u0000 agglomeration of cattle the possibility of spreading of pathogens is also\u0000 increased, there are less opportunities for adequate control and cows are\u0000 exposed to greater selection and production stress. Research of the\u0000 relationship between herd size and welfare quality parameters is still not\u0000 sufficient to make relevant conclusions. Starting from that, the aim of this\u0000 study, conducted in Serbia, is to examine the influence of herd size on\u0000 parameters related to providing good feeding and housing conditions as\u0000 important segments of the overall welfare of dairy cows. The assessment of\u0000 given welfare parameters was done by Welfare Quality? Assessment Protocol\u0000 for Cattle (2009) on 16 dairy farms of different herd sizes (large, medium\u0000 and small) and housing management. The results indicate that there are\u0000 significant variations in welfare indicators in each of the observed groups,\u0000 which is why the size of the herd cannot be taken as a parameter that\u0000 explicitly determines the quality of welfare. However, individual\u0000 observation and comparison of welfare parameters between groups indicate\u0000 that small herds in our production conditions could be identified as the\u0000 greatest risks to the welfare of cows. In small herds, the highest share of\u0000 cows of poor (4.62%) and fattened condition (8.76%) was found, as well as\u0000 the lowest freedom of movement because cows on small farms are mostly reared\u0000 in a tied system. Average values of indicators: lying down time (6.24s),\u0000 frequency of collisions with equipment (13.25%) and high dirt contamination\u0000 of cows (65.6-89.8%) further emphasize the issue of providing comfort in\u0000 small herds.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117243471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The present study aims to research the effect of age on the quality of ejaculates of rams from Synthetic population of Bulgarian dairy breed. Rams divided into two age groups were used for the experiment: G1 (2.5 years) versus G2 (6 years). Ejaculates were obtained by the method of artificial vagina and diluted with medium 6A-G. The tested ejaculates were obtained outside the breeding season. A Sperm Class Analyzer (SCA Microptic, Barcelona, Spain) was used to study sperm motility. The biochemical activity of the enzymes lactate dehydrogenase (LDH) and gamma-glutamyl transferase (GGT) was determined using an automatic Mindrai BA88 spectrophotometer. The activity of the enzymes was studied in sperm plasma, in aqueous and tritonic extract. Significant differences between the groups were found in total sperm motility (P?0.05) and LDH enzyme activity in sperm plasma (P?0.01). Regarding the efficiency of the LDH enzyme in aqueous and tritone extract, no significant differences between the groups was found. No significant differences were found between groups for GGT activity, while age had significant impact on LDH enzyme in sperm plasma.
{"title":"Study of the relationship between the age of the rams and the quality of their ejaculates obtained outside the breeding season","authors":"M. Andreeva, R. Stefanov","doi":"10.2298/BAH2004437A","DOIUrl":"https://doi.org/10.2298/BAH2004437A","url":null,"abstract":"The present study aims to research the effect of age on the quality of\u0000 ejaculates of rams from Synthetic population of Bulgarian dairy breed. Rams\u0000 divided into two age groups were used for the experiment: G1 (2.5 years)\u0000 versus G2 (6 years). Ejaculates were obtained by the method of artificial\u0000 vagina and diluted with medium 6A-G. The tested ejaculates were obtained\u0000 outside the breeding season. A Sperm Class Analyzer (SCA Microptic,\u0000 Barcelona, Spain) was used to study sperm motility. The biochemical activity\u0000 of the enzymes lactate dehydrogenase (LDH) and gamma-glutamyl transferase\u0000 (GGT) was determined using an automatic Mindrai BA88 spectrophotometer. The\u0000 activity of the enzymes was studied in sperm plasma, in aqueous and tritonic\u0000 extract. Significant differences between the groups were found in total\u0000 sperm motility (P?0.05) and LDH enzyme activity in sperm plasma (P?0.01).\u0000 Regarding the efficiency of the LDH enzyme in aqueous and tritone extract,\u0000 no significant differences between the groups was found. No significant\u0000 differences were found between groups for GGT activity, while age had\u0000 significant impact on LDH enzyme in sperm plasma.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116491702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. Caro-Petrovic, M. Petrović, D. Ružić-Muslić, Nevena Maksimović, I. Sycheva, Bogdan Cekić, I. Ćosić
Records of female lambs and their parents of the Mis sheep breed have used. All animals are approximately have weaned at 90 days of age. Descriptive statistics, paired sample test, paired differences, measures of association, correlations and regression of body weights between female lambs and their parents have done. A complementary least body weights at 30 days and weaning between dams and lambs but utmost weight at 30 days, the lambs were higher while at weaning, the dams had higher weight. It can observe that the averages on body weights the rams were the highest, followed by lambs and the lowest the dams? body weights. The coefficient of determination of R2 varies from low to high, indicating that the lamb's body weight has more influenced by other factors that we have not considered. There were significant correlations between lamb body weight at birth and sire/dam body weight at birth. The results showed highly significant correlations of lamb's body weight at 30 days with dams but with sires, positive and very low. There had positive but no significant correlation between lamb body weight at weaning and sire body weight at weaning. Lamb body weight at weaning and dam body weight at weaning are highly correlated.
{"title":"Interrelation between body weights of sire, dam and their lambs at early stage of growth","authors":"V. Caro-Petrovic, M. Petrović, D. Ružić-Muslić, Nevena Maksimović, I. Sycheva, Bogdan Cekić, I. Ćosić","doi":"10.2298/bah2002205c","DOIUrl":"https://doi.org/10.2298/bah2002205c","url":null,"abstract":"Records of female lambs and their parents of the Mis sheep breed have used.\u0000 All animals are approximately have weaned at 90 days of age. Descriptive\u0000 statistics, paired sample test, paired differences, measures of association,\u0000 correlations and regression of body weights between female lambs and their\u0000 parents have done. A complementary least body weights at 30 days and weaning\u0000 between dams and lambs but utmost weight at 30 days, the lambs were higher\u0000 while at weaning, the dams had higher weight. It can observe that the\u0000 averages on body weights the rams were the highest, followed by lambs and\u0000 the lowest the dams? body weights. The coefficient of determination of R2\u0000 varies from low to high, indicating that the lamb's body weight has more\u0000 influenced by other factors that we have not considered. There were\u0000 significant correlations between lamb body weight at birth and sire/dam body\u0000 weight at birth. The results showed highly significant correlations of\u0000 lamb's body weight at 30 days with dams but with sires, positive and very\u0000 low. There had positive but no significant correlation between lamb body\u0000 weight at weaning and sire body weight at weaning. Lamb body weight at\u0000 weaning and dam body weight at weaning are highly correlated.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116739238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Violeta Mandić, Z. Bijelić, V. Krnjaja, M. Petričević, A. Simić, Ivan Krga
Vojvodina Province is a major alfalfa producer in Serbia with approximately 35.7% of total area and total production share of approximately 43.1%. In this paper, the data on area, production and yield of alfalfa observations from 1947 to 2018 and their variation and trends are analysed. The data indicate wide differences in the harvested area, total production and yield of alfalfa. The analysis of data indicates that harvested area and total production of alfalfa have declined over the past decades. Yield trend shows strong yield increase during 1950-1980 followed by periods of declined growth rates to 1990. After 1990s, dry matter yield has been stagnant. However, the increase, decrease and stagnation in yield are not strictly linear.
{"title":"Trend analysis of harvested area, total production and yield of alfalfa in Vojvodina","authors":"Violeta Mandić, Z. Bijelić, V. Krnjaja, M. Petričević, A. Simić, Ivan Krga","doi":"10.2298/bah1904409m","DOIUrl":"https://doi.org/10.2298/bah1904409m","url":null,"abstract":"Vojvodina Province is a major alfalfa producer in Serbia with approximately\u0000 35.7% of total area and total production share of approximately 43.1%. In\u0000 this paper, the data on area, production and yield of alfalfa observations\u0000 from 1947 to 2018 and their variation and trends are analysed. The data\u0000 indicate wide differences in the harvested area, total production and yield\u0000 of alfalfa. The analysis of data indicates that harvested area and total\u0000 production of alfalfa have declined over the past decades. Yield trend shows\u0000 strong yield increase during 1950-1980 followed by periods of declined\u0000 growth rates to 1990. After 1990s, dry matter yield has been stagnant.\u0000 However, the increase, decrease and stagnation in yield are not strictly\u0000 linear.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115196087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Mouhous, F. Djellal, H. Guermah, Siamwalla Ammar
The aim of this study is to explore the technical and economic aspects of cattle farms in mountain areas and to identify their technical constraints and potentialities. One hundred dairy cattle farmers were surveyed for seven months. The results show that the average farm size is 13 dairy cows and shows considerable variability at the sample level. For one-third of the farms, stabling is almost permanent and feed concentrate used as supplement (on average 7 kg /cow/day). 85% of the factors of production (useful agricultural area and possession of tractor) are owned by 45% of the breeders. Cow productivity averages is around 10.5 kg / day with two milkings / day. In addition, the average self-consumption of milk is 6 kg / day, which represents 2.8% of milk production. Feed expenses represent 90% of production costs. Annual income range from 99 909 AD / livestock unit (LU) nearly 148 421 AD / livestock unit. This variation is a function of the endowment of production resources. Subsidies for milk production represent 58% of the average income of farmers, what shows the low yield of dairy cattle farms. Today, with the drastic reduction in financial resources, dairy production development policies should focus on strategies to improve cow productivity and profitability in those areas.
本研究的目的是探索山区养牛场的技术和经济方面，并确定其技术限制和潜力。对100名奶牛养殖户进行了为期7个月的调查。结果表明，平均农场规模为13头奶牛，在样本水平上表现出相当大的变异性。在三分之一的农场中，猪圈几乎是永久性的，饲料精料作为补充(平均7公斤/头牛/天)。85%的生产要素(耕地面积和拖拉机拥有量)为45%的养殖户所有。奶牛的平均产奶量约为10.5公斤/天，每天两次挤奶。此外，牛奶的平均自我消费量为6公斤/天，占牛奶产量的2.8%。饲料费用占生产成本的90%。年收入从99909 AD /牲畜单位(LU)到144821 AD /牲畜单位不等。这种变化是生产资源禀赋的函数。牛奶生产补贴占农民平均收入的58%，这表明奶牛养殖场的产量很低。今天，随着财政资源的急剧减少，乳制品生产发展政策应侧重于提高这些地区奶牛生产力和盈利能力的战略。
{"title":"Technical and economic performance of dairy cattle farming in mountain areas in Tizi-Ouzou, Algeria","authors":"A. Mouhous, F. Djellal, H. Guermah, Siamwalla Ammar","doi":"10.2298/BAH2004487M","DOIUrl":"https://doi.org/10.2298/BAH2004487M","url":null,"abstract":"The aim of this study is to explore the technical and economic aspects of\u0000 cattle farms in mountain areas and to identify their technical constraints\u0000 and potentialities. One hundred dairy cattle farmers were surveyed for seven\u0000 months. The results show that the average farm size is 13 dairy cows and\u0000 shows considerable variability at the sample level. For one-third of the\u0000 farms, stabling is almost permanent and feed concentrate used as supplement\u0000 (on average 7 kg /cow/day). 85% of the factors of production (useful\u0000 agricultural area and possession of tractor) are owned by 45% of the\u0000 breeders. Cow productivity averages is around 10.5 kg / day with two milkings\u0000 / day. In addition, the average self-consumption of milk is 6 kg / day, which\u0000 represents 2.8% of milk production. Feed expenses represent 90% of production\u0000 costs. Annual income range from 99 909 AD / livestock unit (LU) nearly 148\u0000 421 AD / livestock unit. This variation is a function of the endowment of\u0000 production resources. Subsidies for milk production represent 58% of the\u0000 average income of farmers, what shows the low yield of dairy cattle farms.\u0000 Today, with the drastic reduction in financial resources, dairy production\u0000 development policies should focus on strategies to improve cow productivity\u0000 and profitability in those areas.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121805081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Thobela Louis Tyasi, Amanda Tshegofatso Mkhonto, M. Mathapo, K. Molabe
Regression tree is the data mining algorithm method which contains a series of calculations that creates a model from collected data. Present study aimed to develop model to estimate body weight (BW) from biometric traits viz. withers height (WH), sternum height (SH), body length (BL), heart girth (HG) and rump height (RH). A total of eighty-three (n = 83) South African non-descript indigenous goats ( 54 females and 29 males) aged three months and above were used in the study. Pearson?s correlations and classification and regression tree (CART) as statistical techniques were used for data analysis. Correlation results indicated that there was a positive highly statistical significant (P < 0.01) correlation between BW and all biometric traits in both males and females, the positive highly statistical significant correlation was observed between BW and WH (r = 0.82) in female goats while in males the highest positive statistical significant correlation was detected between BW and BL (r = 0.83). CART model indicated that the BW mean was 29.868 kilograms (kg) as dependent variable and BL had the highest remarkable role in BW followed by SH, RH while the age had the least remarkable role in BW. This study suggests that BL, SH and RH might be used by South African non-descript goats? farmers as a selection criterion during breeding to improve BW of animal. More completive studies and experiments need to be done using CART to predict BW in more sample size of South African nondescript goats or other goat breeds.
{"title":"Regression tree analysis to predict body weight of South African non-descript goats raised at Syferkuil farm, Capricorn District of South Africa","authors":"Thobela Louis Tyasi, Amanda Tshegofatso Mkhonto, M. Mathapo, K. Molabe","doi":"10.2298/bah2104293t","DOIUrl":"https://doi.org/10.2298/bah2104293t","url":null,"abstract":"Regression tree is the data mining algorithm method which contains a series\u0000 of calculations that creates a model from collected data. Present study\u0000 aimed to develop model to estimate body weight (BW) from biometric traits\u0000 viz. withers height (WH), sternum height (SH), body length (BL), heart girth\u0000 (HG) and rump height (RH). A total of eighty-three (n = 83) South African\u0000 non-descript indigenous goats ( 54 females and 29 males) aged three months\u0000 and above were used in the study. Pearson?s correlations and classification\u0000 and regression tree (CART) as statistical techniques were used for data\u0000 analysis. Correlation results indicated that there was a positive highly\u0000 statistical significant (P < 0.01) correlation between BW and all biometric\u0000 traits in both males and females, the positive highly statistical\u0000 significant correlation was observed between BW and WH (r = 0.82) in female\u0000 goats while in males the highest positive statistical significant\u0000 correlation was detected between BW and BL (r = 0.83). CART model indicated\u0000 that the BW mean was 29.868 kilograms (kg) as dependent variable and BL had\u0000 the highest remarkable role in BW followed by SH, RH while the age had the\u0000 least remarkable role in BW. This study suggests that BL, SH and RH might be\u0000 used by South African non-descript goats? farmers as a selection criterion\u0000 during breeding to improve BW of animal. More completive studies and\u0000 experiments need to be done using CART to predict BW in more sample size of\u0000 South African nondescript goats or other goat breeds.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128013745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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