South African Journal of Animal Science最新文献_第7页

Early phase dietary supplementation of lipase and lecithin affects performance, haematology and immunology of broilers 饲粮早期添加脂肪酶和卵磷脂会影响肉仔鸡生产性能、血液学和免疫学

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-10 DOI: 10.4314/sajas.v51i5.14

M. Shabani, D. De Marzo, L. Esmailzadeh, A. Seidavi, V. Laudadio, V. Tufarelli

{"title":"Early phase dietary supplementation of lipase and lecithin affects performance, haematology and immunology of broilers","authors":"M. Shabani, D. De Marzo, L. Esmailzadeh, A. Seidavi, V. Laudadio, V. Tufarelli","doi":"10.4314/sajas.v51i5.14","DOIUrl":"https://doi.org/10.4314/sajas.v51i5.14","url":null,"abstract":"A total of 192 one-day-old Ross 308 chicks were weighed individually (42.0 ± 0.8 g live weight) and randomly assigned to four dietary groups, each with three replicates of 16 birds. One group was a control (CON) and fed a starter diet without supplementation. The other three groups were fed the same starter diet during the starter phase (1 - 10 days old) supplemented with lecithin (LEC) at 0.05 g/kg diet or lipase (LIP) at 0.05 g/kg, or a combination (LEC+LIP) at 0.05 + 0.05 g/kg. No significant effects of supplementation with LEC and LIP on feed intake of broilers were observed during the starter phase, whereas bodyweight gain increased after the combined addition of these supplemental ingredients. Thus, final bodyweight was greater in LEC+LIP broilers compared with the other groups. Dietary supplementation with LEC or LIP had a positive effect on final bodyweight. However, the effect was less than the simultaneous supplementation of LEC+LIP. Moreover, the feed conversion ratio in the LEC+LIP group improved (P <0.05) in the finisher phase (25 - 42 days old). Carcass traits and blood parameters were not influenced significantly by treatments, whereas supplementing LEC+LIP stimulated the immune system of broilers significantly. Thus, it can be concluded that supplementing LEC and LIP in early-stage broilers supported their performance and immune response positively up to finisher rearing phase.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"102 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80649837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The impact of dietary protein content and lighting programme on breast meat yield in broiler chickens 饲粮蛋白质含量和光照方案对肉鸡胸肉产量的影响

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-10 DOI: 10.4314/sajas.v52i1.9

P. Sodella, Z. Rani, R. Gous

{"title":"The impact of dietary protein content and lighting programme on breast meat yield in broiler chickens","authors":"P. Sodella, Z. Rani, R. Gous","doi":"10.4314/sajas.v52i1.9","DOIUrl":"https://doi.org/10.4314/sajas.v52i1.9","url":null,"abstract":"Effects of the interaction between lighting programme and dietary protein content on broiler performance and meat yield were investigated. The hypothesis was that low breast meat yield from birds managed under short day lengths could be improved by increasing dietary protein content. The treatments consisted of four lighting programmes and four dietary protein levels. They were applied to sexed broilers from one day old to 35 days old. Eight light-tight rooms each contained eight pens with 50 birds, sexes separate, in each pen. Each feed x sex treatment was replicated twice in each room, with the four lighting treatments also being replicated twice. Multiple regression analysis was used to measure responses to the three factors. There was no significant interaction between dietary protein content and lighting programme in feed intake, feed conversion efficiency, bodyweight gain, carcass chemical composition and breast meat yield. Breast meat yield was linearly related to the number of hours of light, the highest yield occurring on the longest day length. Food intake was the same on the shortest day length and the longest, yet breast meat yield was greater on the 23-hour light programme. The decreased breast meat yield in broilers given short day lengths was therefore not the consequence of a shortage of dietary protein, and this hypothesis therefore had to be rejected.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"4 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82442731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Partial replacement of maize meal with high-tannin sorghum meal affects finishing and methane emissions of Pedi goats 用高单宁高粱粕部分替代玉米粉影响佩地山羊的肥育和甲烷排放

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-10 DOI: 10.4314/sajas.v52i1.2

N. O. Mavasa, J. Ng'ambi, T. Chitura

{"title":"Partial replacement of maize meal with high-tannin sorghum meal affects finishing and methane emissions of Pedi goats","authors":"N. O. Mavasa, J. Ng'ambi, T. Chitura","doi":"10.4314/sajas.v52i1.2","DOIUrl":"https://doi.org/10.4314/sajas.v52i1.2","url":null,"abstract":"This study was conducted to determine the effect of replacing maize meal with Sorghum vulgare meal, a high-tannin sorghum meal, in fattening diets on bodyweight and methane emissions by yearling male Pedi goats. A total of 12 yearling male Pedi goats with an average initial liveweight of 14 ± 1 kg were randomly assigned to a complete randomized design with four treatments, which were formulated such that 0%, 10%, 20% and 30% of the maize meal was replaced with Sorghum vulgare meal. The experiment was conducted over 28 days, with 21 days adaptation, followed by seven days for sample collection. Replacing maize meal with sorghum did not produce detectable (P >0.05) effects on bodyweight and live weight gain. The various replacement levels of sorghum meal had no detectable effects on the blood cell profile of Pedi goats either. However, they reduced methane emission and improved feed conversion ratio (P <0.05), which allowed for an approximation of the feed required by growing goats. These findings may assist farmers in selecting and utilizing the right feeds to maximize profitability in the small-stock farming sector. ","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"103 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80417747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect of dietary energy concentration on the growth of slow-growing Korat chickens from 43 to 84 days old 饲粮能量浓度对43 ~ 84日龄慢生长Korat鸡生长的影响

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-10 DOI: 10.4314/sajas.v52i1.3

P. Maliwan, S. Okrathok, C. Pukkung, P. Pasri, S. Khempaka

{"title":"Effect of dietary energy concentration on the growth of slow-growing Korat chickens from 43 to 84 days old","authors":"P. Maliwan, S. Okrathok, C. Pukkung, P. Pasri, S. Khempaka","doi":"10.4314/sajas.v52i1.3","DOIUrl":"https://doi.org/10.4314/sajas.v52i1.3","url":null,"abstract":"The aim of this study was to estimate the effect of diets with different energy levels on the growth performance of slow-growing chickens (so-called Korat chicken (KRC)). The KRC is a cross between a male Thai native chicken (Leung Hang Khoa) and females from crosses among modern broiler and layer lines. The study was divided into two experimental periods when the birds were from 43 to 63 days old and 64 to 84 days old. Birds received feed and water ad libitum throughout the trial. In this study, 1200 mixed-sex KRC(624 and 576 chicks in phases 1 and 2, respectively) were distributed equally to four diets, which provided 2750, 2900, 3050 and 3200 kcal ME/kg. There were six replicate pens of each treatment. At both ages,increased energy content of the diet resulted in decreased feed intake (FI) and thus improved the feed conversion ratio (FCR). Weight gain was unaffected by the treatments. Using a broken-line analysis, dietary energy containing about 3200 kcal ME/kg was found to have the most beneficial effect on FCR during both periods. Thus, the optimal ME for KRC between 43 and 84 days old was 3200 kcal/kg.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"24 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78847422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of flushing and various doses of β-Carotene and vitamin E applications on the reproductive performance of ewes 冲洗及不同剂量β-胡萝卜素和维生素E对母羊繁殖性能的影响

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-10 DOI: 10.4314/sajas.v52i1.11

S. O. Altınçeki̇ç, M. Koyuncu, S. Duru

{"title":"Effects of flushing and various doses of β-Carotene and vitamin E applications on the reproductive performance of ewes","authors":"S. O. Altınçeki̇ç, M. Koyuncu, S. Duru","doi":"10.4314/sajas.v52i1.11","DOIUrl":"https://doi.org/10.4314/sajas.v52i1.11","url":null,"abstract":"The aim of this study was to determine whether fertility could be enhanced in Kıvırcık ewes during the anoestrous period by flushing or by administering an injectable (Ovostim) containing β-Carotene and vitamin E. Three-year-old Kıvırcık ewes (n = 99) were used. The ewes were randomly divided into four groups: flushing, a single dose of Ovostim (5 ml/ewe) before the breeding season, a dose of Ovostim 10 days before the breeding season and a second dose at its start, and an untreated control. Results showed that pregnancy rate was higher in the treated groups than in the control (P <0.001). The single dose of Ovostim produced more multiple births (72%) and the highest litter size (1.64) compared with the other treatments. Although the double-dose of Ovostim influenced the ewes in the anoestrous period to the point of becoming pregnant, it failed to favourably affect the number of lambs born per ewe lambing. In conclusion, flushing the ewes or administering a single dose of Ovostim was shown to be advantageous in comparison with untreated ewes or those given two doses of Ovostim.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"6 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77086451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Concentrations of metal residues in domestically produced and imported milk in Kosovo 科索沃国内生产和进口牛奶中金属残留物的浓度

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-10 DOI: 10.4314/sajas.v51i5.8

B. Dragusha, H. Aliu, S. Dizman

{"title":"Concentrations of metal residues in domestically produced and imported milk in Kosovo","authors":"B. Dragusha, H. Aliu, S. Dizman","doi":"10.4314/sajas.v51i5.8","DOIUrl":"https://doi.org/10.4314/sajas.v51i5.8","url":null,"abstract":"The aim of this study was to investigate the concentration of metal residues in cows’ milk and the health risks to humans from its consumption. In total 37 milk samples were analysed, namely 32 raw milk samples from domestic rural milk collection centres, and 5 imported sterilized milk samples from markets. The concentrations of chromium (Cr), manganese (Mn), nickel (Ni), and copper (Cu) in the milk samples were from 0.06 to 20.3 μg/kg, 4.7 to 64.8 μg/kg, 2.16 to 65.99 μg/kg and 0.21 to 44.7 μg/kg, respectively. Concentrations of iron (Fe), zinc (Zn), arsenic (As), cadmium (Cd), mercury (Hg), and lead (Pb) ranged from 157.52 to 989.95 μg/kg, 1429.63 to 5718.71 μg/kg, 0.12 to 2.01 μg/kg, 0.22 to 2.28 μg/kg, 0.00 to 0.29 μg/kg, and 0.17 to 4.29 μg/kg, respectively. The concentrations of Mg, Fe and Zn were slightly higher in domestic milk samples than in imported milk. The concentrations of Cr, Ni, Cu, As, Cd, Hg, and Pb were higher in imported milk samples than in the samples of domestic milk. Overall concentrations of minor elements had good nutritional values and the levels of the heavy toxic metals including As, Cd, Hg, and Pb were lower than the recommended limits and did not pose any threat to consumers.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"52 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85767174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Gene expression at different cell stages of in vitro-fertilized bovine embryos 牛体外受精胚胎不同细胞阶段基因表达的研究

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-10 DOI: 10.4314/sajas.v52i1.13

N.M. Al-Malahi, M. Daghestani, M. Al-Ghadi, A. Alhimaidi

{"title":"Gene expression at different cell stages of in vitro-fertilized bovine embryos","authors":"N.M. Al-Malahi, M. Daghestani, M. Al-Ghadi, A. Alhimaidi","doi":"10.4314/sajas.v52i1.13","DOIUrl":"https://doi.org/10.4314/sajas.v52i1.13","url":null,"abstract":"The birth rate of embryos produced in vitro (IVF) is still lower than that of embryos produced in vivo. Three major steps for the success of the IVF technique are maturation of immature oocytes, fertilization of matured oocytes, and culture of the resulting embryos. Studying mRNA expression in early embryonic development stages is important and can help to assess embryo quality and optimize production protocols in vitro. The current study aimed to determine the expression levels of developmentally important genes in different stages of bovine embryos produced in vitro. Cumulus-oocyte complexes (COCs) were collected from bovine ovaries and cultured in synthetic oviduct fluid (SOF) medium for 7 - 9 days. Embryos were collected at the time-points listed above, and mRNA expression of genes involved in pluripotency (OCT4), DNA methylation (DNMT1), apoptosis (BAX), and metabolism (GLUT1) and a heat shock protein (HSP70) was estimated from the 2-cell stage to the blastocyst stage of embryos. The results showed statistically significant differences in the relative abundance (RA) of OCT4, DNMT1, BAX, and GLUT1 gene transcripts among the different stages, whereas there were non-significant differences in the RA of HSP70 between these stages. In conclusion, gene expression levels differ among the developmental stages of embryos produced in vitro, possibly because of the timing of embryonic genome activation (EGA).","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"216 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78496971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of sex on carcass composition and physicochemical, textural and rheological properties of meat from grey partridge 性别对灰鹧鸪胴体组成及肉质、物性和流变性质的影响

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-10 DOI: 10.4314/sajas.v51i5.11

K. Włodarczyk, D. Kokoszyński, M. Saleh, M. Kotowicz, P. Wasilewski

{"title":"Effects of sex on carcass composition and physicochemical, textural and rheological properties of meat from grey partridge","authors":"K. Włodarczyk, D. Kokoszyński, M. Saleh, M. Kotowicz, P. Wasilewski","doi":"10.4314/sajas.v51i5.11","DOIUrl":"https://doi.org/10.4314/sajas.v51i5.11","url":null,"abstract":"The study aimed to determine the effects of sex on bodyweight (BW) and dimensions, carcass weight, dressing percentage, percentage of carcass components, chemical composition, mineral content, acidity and electrical conductivity of the breast and leg muscles of grey partridges (Perdix perdix L.). The experiment also determined the colour attributes, textural and rheological characteristics, and mineral content in the liver of the grey partridge. Fifteen males and 15 females were examined. Carcasses were weighed on electronic scales, then dissected. The chemical compounds in the breast and leg muscles were determined with a near-infrared spectrophotometer. To ascertain the contents of minerals, the meat samples were analysed by spectrometry. The textural and rheological properties were established with the TPA double compression test, Warner-Bratzler (WB) test, and the relaxation test. At 36 weeks, males had significantly longer keels and shanks than females. Males and females did not differ significantly in the weight of the eviscerated carcass, dressing percentage, and percentage of carcass components. There were no significant differences between males and females in the chemical composition of meat from breasts and legs, and in the mineral contents of the breast and leg muscles and the liver. Bird sex had no significant effect on acidity and electrical conductivity of the breast and leg muscles or on the lightness (L*), redness (a*), and yellowness (b*) of the Pectoralis major muscle. No significant differences were established between 36-week-old males and females in textural and rheological characteristics. Thus, there was scant evidence for sexual dimorphism in this species.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"56 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85241323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Effects of breed and fattening system on fatty acid and chemical composition of meat from male lambs 品种和育肥制度对公羊羔肉质脂肪酸和化学成分的影响

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-10 DOI: 10.4314/sajas.v52i1.8

M. Sari, Y. Aksoy, H. Erinç, K. Önk, S. Işik, M. Tilki

{"title":"Effects of breed and fattening system on fatty acid and chemical composition of meat from male lambs","authors":"M. Sari, Y. Aksoy, H. Erinç, K. Önk, S. Işik, M. Tilki","doi":"10.4314/sajas.v52i1.8","DOIUrl":"https://doi.org/10.4314/sajas.v52i1.8","url":null,"abstract":"The purpose of this study was to examine the fatty acid and chemical composition of the Longissimus dorsi (LD) from male Tuj and Hemşin lambs reared in extensive, semi-intensive and intensive feeding systems. At the end of 90 days eight lambs from each breed and feeding system were slaughtered to determine chemical composition, and six lambs in each group were selected at random to assess fatty acid composition. Breed and feeding system interaction affected the quantities of saturated fatty acids (SFA), monounsaturated fatty acids (MUFA), and polyunsaturated fatty acids (PUFA), and the atherogenic (AI), thrombogenic (TI), and nutritive value (NVI) indices. In Hemşin the ratio of PUFA to SFA was higher in lambs fed in the extensive system than those produced in the semi-intensive and intensive systems, which were similar, whereas in Tuj this ratio decreased from the extensive to semi-intensive to intensive feeding systems. The ratio of omega n-6 to omega n-3 fatty acids was lower in the extensive and semi-intensive systems than it was in intensively fed Hemşin lambs, but increased with the intensity of feeding in Tuj lambs. Intramuscular fat content was higher in Hemşin lambs than in Tuj lambs and increased with the intensity of the feeding system. Conjugated linoleic acid content (CLA) was affected by feeding system in Hemşin lambs, but not in Tuj lambs. Because of their high PUFA/SFA ratio and low TI value, Tuj lambs reared in extensive feeding system were deemed to have the best performance.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"2 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82103374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effects of feeding systems on yield and performance of Linda geese (Anserinae sp.) in hot climatic conditions 炎热气候条件下饲喂制度对林达鹅产量和生产性能的影响

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-10 DOI: 10.4314/sajas.v51i5.9

Z. Kaya, S. Yurtseven

{"title":"Effects of feeding systems on yield and performance of Linda geese (Anserinae sp.) in hot climatic conditions","authors":"Z. Kaya, S. Yurtseven","doi":"10.4314/sajas.v51i5.9","DOIUrl":"https://doi.org/10.4314/sajas.v51i5.9","url":null,"abstract":"This study evaluated the effects of various types of feeding on fattening period and performance of Linda geese. Feeding patterns consisted of concentrate feed-based intensive and pasture feed-based semi-intensive. A total of 150 goslings aged three days were divided into two groups, each consisting of three replications. All groups were given rations containing 23% crude protein and 3100 kcal/kg ME in weeks 0–6, and rations containing 20% crude protein 3100 kcal/kg ME between weeks 7 and 17. After the seventh week, the feed for the semi-intensive group was diluted with 20% barley and from the tenth week, this group started to graze on pasture. Live weight gain of the two groups was similar, although geese kept indoors consumed more concentrate. Feed protein digestion of geese was similar in the two feeding types. Digestion-related visceral weight in the pasture-supplemented group increased, whereas carcass weight decreased. Growth curves were used to estimate the age of Linda geese to the end of the fattening period. The average slaughter age was the fourth and fifth months, as indicated by Von Bertalanffy, Logistic, and Gompertz growth models, which used the data from the third week. Concentrate feeding enabled Linda geese to reach earlier higher slaughter weight, although it was not considered economical. Although averages of bodyweight gain over the trial appeared slightly better in the concentrate-based intensive group, the results revealed that concentrate feed supplement and pasture may be the best and most economical form of feeding for Linda geese.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"34 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73418588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1