فهرس المقالات dairy goat

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  1 - Effects of Two Sources of Tannins on Performance, Nitrogen Utilization and Efficiency of Microbial Nitrogen Synthesis in Dairy Goats
  ا. مختارپور ع.ع. ناصریان ف. پورملایی س. صفا
  The aim of this study was to evaluate the effects of tannic acid (TA) and pistachio by-product tannin extract (PBE) on N utilization and efficiency of microbial nitrogen synthesis (EMNS) in Saanen dairy goats. The experimental design was a change over design with three أکثر

  The aim of this study was to evaluate the effects of tannic acid (TA) and pistachio by-product tannin extract (PBE) on N utilization and efficiency of microbial nitrogen synthesis (EMNS) in Saanen dairy goats. The experimental design was a change over design with three treatments and three periods using six mid lactation multiparous dairy goats. Tannic acid solution and PBE were added to fresh alfalfa at ensiling to get the final concentration of about 1% tannin as dry matter (DM) basis. Dietary treatments were as follows: 1) untreated alfalfa silage (AS), 2) AS treated with TA (AS+TA) and 3) AS treated with PBE (AS+PBE). Intake of DM, organic matter (OM) and N and also milk yield and composition (as percent or as g/d) were not affected by tannin additions. A considerable shift occurred in the pattern of N excretion in goats fed PBE diet compared to control silage diet. Urinary N losses had a tendency (P<0.10) to lower (17.4 vs. 19.2 g/d) and fecal N losses was higher for goats fed AS + PBE compared with those fed the AS silage diet (14.6 vs. 12.6 g/d). As a proportion of N intake or as g N loss per d, retained N was higher (P<0.05) in goats fed AS + PBE compared to those fed the control diet. Microbial nitrogen synthesis (MN) was not affected by tannin additions. However, a trend (P<0.10) for less efficiency of microbial nitrogen synthesis (EMN) was observed in tannin fed goats compared to those fed the control diet. Although, tannins added to AS may exert some beneficial effects on N utilization and also environmental N outputs, they may interfere with rumen fermentation lead to decrease in EMN in goats especially those fed with PBE. تفاصيل المقالة
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  2 - Physical Form of Concentrate for Lactating Murciano-Granadina Dairy Goats: Feed Intake and Sorting, Milk Production, and Blood Metabolites
  M.H. Khabbazan H. Amanlou D. Zahmatkesh E. Mahjoubi A. Nikkhah
  Global demand for goat milk and its products is increasing. Goat producers are urged to improve feed efficiency and farm economics. Physical form of concentrate was hypothesized to affect lactating dairy goats’ responses in feed intake and sorting, milk production أکثر

  Global demand for goat milk and its products is increasing. Goat producers are urged to improve feed efficiency and farm economics. Physical form of concentrate was hypothesized to affect lactating dairy goats’ responses in feed intake and sorting, milk production, and blood metabolites. The objective of this study was to determine effects of different physical forms of concentrate [mashed (M), pelleted (P), or textured (T)] on feed intake and sorting, milk production, and selected blood metabolites of lactating Murciano-Granadina dairy goats. Thirty Murciano-Granadina dairy goats in mid-lactation (87±6 days in milk; 2±0.04 kg/d milk yield) were used in a completely randomized design study and assigned to the three forms of concentrate (10 goats per treatment). Goats were fed the experimental diets as totally mixed rations (TMR). The data were analyzed using mixed models of SAS program. The dry matter intake (DMI) and yields of raw milk; fat-corrected milk; milk fat, protein, lactose, and solids not fat (SNF); and cheese as well as feed efficiency were improved (P<0.01) by feeding T instead of M and P. Feeding P vs. M improved milk production and feed efficiency (P<0.05). The milk percentages of fat, protein, lactose and blood concentrations of glucose, albumin, and non-esterified fatty acid (NEFA) were unaffected by treatments. Feed sorting occurred less for T than for the other physical forms of concentrate. Therefore, under the conditions of this experiment, feeding lactating Murciano-Granadina dairy goats TMR with textured concentrate compared to mashed and pelleted concentrates increased milk production and cheese yield estimates, and improved feed efficiency. تفاصيل المقالة
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  3 - Image Process Tool an Alternative Method for Quantitative Assessment of Mammary Gland Structure in Mohabadi Goat
  S. Nazmi Karkaj A. Javanmard S. Alijani K. Hasanpur S. Sadeghi
  Milking ability in goat farming is not particularly new, however, it has frameworks for receiving economic benefits from marketing of milk. For this reason, investigation of varied methods plays an important role to evaluate mammary gland structure in dairy animal. Henc أکثر

  Milking ability in goat farming is not particularly new, however, it has frameworks for receiving economic benefits from marketing of milk. For this reason, investigation of varied methods plays an important role to evaluate mammary gland structure in dairy animal. Hence, the overall objective of current work was to test the image processing tools as an alternative method for quantitative assessment of mammary gland structure in Mohabadi goat. Under this circumstance, survey data was collected from 72 Mohabadi does from research station of Department of Animal Science, University of Tehran. The fixed effects for each candidate animal consists of pedigree, birth date, milk characteristics as well as monitoring the history of record during assessment was monitored. Image process tools was based on two stages: First, three different camera photos were taken from different angels of mammary gland structure from both sides of each animal and next step, Digimizzer image processing software was employed for further analysis and estimation of seven morphological dimensions (udder length, teat length and teat angle at both sides and as well as udder height). To investigate this statistically, the descriptive statistics, correlation, different regression analysis, principal component analysis and as well as association study between linear mammary gland traits and milk were analyzed using SAS 9.3 software. The highest correlation was observed in the length of right and left udder (r=0.67 P<0.05). The results revealed that the milk yield was significantly influenced by the length of the right teat (P<0.05). In conclusion, digital image processing may be considered as alternative tools for linear morphological characterization that would provide more accurate observation and measurements on the indigenous goat population. تفاصيل المقالة
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  4 - Protected Protein Supplement Based on Rumen Undegradable Protein to Enhanced Productivity of Etawah Crossbred Dairy Goats
  I.G. Permana F.R.  Pambudi S.I.Z.  Arif D.  Despal A.  Rosmalia
  High-lactating dairy goats require a substantial amount of protein. Protected protein supplements could provide a significant quantity of rumen undegradable protein (RUP), ensuring an adequate protein supply for high-lactating dairy goats. This study aimed to evaluate t أکثر

  High-lactating dairy goats require a substantial amount of protein. Protected protein supplements could provide a significant quantity of rumen undegradable protein (RUP), ensuring an adequate protein supply for high-lactating dairy goats. This study aimed to evaluate the impact of protected protein supplements on the productivity of Etawah crossbred dairy goats. The study involved 16 Etawah crossbred lactating goats with an average milk production of 0.94 ± 0.38 L head-1 day-1 and an average body weight of 46.80 ± 7.50 kg. A randomized block design of four treatments and four replications was used. The treatment ration were: R0= a ration with 0% protected protein supplement content as control, R1= R0 + 5% protected pro-tein supplement, R2= R0 + 10% protected protein supplement, and R3= R0 + 15% protected protein sup-plement. Data was analyzed using ANOVA and continued to the Duncan test. The results showed that the R1, R2, and R3 treatments significantly (P<0.05) influenced the increase in feed intake, milk production, milk component production, milk urea nitrogen, and blood urea nitrogen. However, no significant effect was observed on milk quality, milk density, blood hematology, blood glucose, triglycerides, or economic factors. It can be concluded that adding a 5% protected protein supplement improved the performance of Etawah crossbred dairy goats without compromising milk quality and animal health. تفاصيل المقالة