RESUMO
BACKGROUND: In recent years, dietary fat supplementation has become a common practice and fat supplemented diets have had variable effects on animal performance and carcass characteristics.
OBJECTIVES: This study was conducted to determine the effect of increasing the levels of sesame oil on performance, rumen parameters and plasma lipid profile in finishing Chal lambs.
METHODS: Eighteen male lambs were fed with control [C; without sesame oil] and the diets contained low level [LSO; 2.5%] and high level [HSO; 5%] of sesame oil.
RESULTS: The addition of fat had no effect on dry matter intake [DMI], average daily gain [ADG], feed conversion ratio [FCR] and carcass weight. Treatments with sesame oil had no effect on rumen ammonia concentration and total protozoal count. Ruminal pH was numerically smaller [p=0.14] for control compared to lambs fed diets containing 2.5 and 5% sesame oil. Treatments had no effect on total VFA, acetate, butyrate, valerate and isovalerate concentrations. The propionate concentration decreased [p=0.04] by supplementation of sesame oil compared with the control. Total cholesterol [TC] and HDL increased and the tendency for VLDL and triglyceride [p=0.13] to increase was observed by treatment groups when compared with the control. Glucose concentration and LDL were not affected by treatment.
CONCLUSIONS: Sesame oil had no effect on the performance and carcass weight of lambs but there was decrease in blood cholesterol concentration.
RESUMO
The aim of this study was to investigate the effect of bacterial inoculation on the fermentation and aerobic stability of corn silage and on the dry matter degradability and milk composition when fed to sheep or cows. Four male sheep were selected to measure dry matter degradability of uninoculated [UCS] and inoculated [ICS] corn silage. Milk composition was measured for 22 Holstein cows, separated into two treatment groups and fed with either UCS or ICS diets. Similar lactic acid concentrations but higher propionic and lower acetic acid concentrations were recorded for ICS diets compared to UCS diets [p < 0.05]. Aerobic stability was 12 h and 32 h for UCS and ICS, respectively. Values of in sacco dry matter loss were higher for ICS than for UCS [p < 0.05]. Lactose and solid non-fat content was higher in the milk of cows fed with ICS than UCS [p < 0.05]. We conclude that the Lalsil bacterial inoculant containing propioni bacterium acidipropionici andLactobacillusplantarum can be used as an additive due to its positive effect on fermentation, aerobic stability and dry matter degradability of corn silage. The slight positive effect of inoculcation on the nutritional value of silage appears to be limited to milk production improvement in dairy cows
Assuntos
Animais , Zea mays , Silagem , Leite/química , BovinosRESUMO
Objective: to study the effect of CIDR on oestrous synchronization and comparison of twining percentage by using eCG and handing diet and their interaction
Design: completely randomized design
Statistical analysis: use of SPSS statistical program for parameter data and X2 and Man- Witny test for non- parameter data
Animals: a total of 69 ewes and 6 rams of Zandi breed
Procedure: sixty-nine Zandi ewes within 2-5 years old and weighting 47.9 [k5.6] Kg, were divided into 3 groups [group I fed in the pasture and two other groups were fed in their pens]. In order to synchronize oestrous cycle, all ewes [in 3 groups] were treated for 13 days with a controlled internal drug-releasing device [CIDR]. On the following day after removing CIDRs, ewes in groups 1 and 2 received an injection of 400 ILT eCG Two Zandi rams were then introduced to each group
Results: the results of the present study indicated that oestrus was induced within 36-48h post CIDR withdrawal in 100, 87 and 96 percentage of ewes in groups 1, 2 and 3 respectively and this differences were not significant. The percentage of parturition was 91, 83 and 87 in groups 1, 2 and 3 respectively and differences were not significant. The percentage of twining [based on ewes lambing] was significantly [P<0.05] lower in the group 3, comparing to groups 1 and 2 [29,37 and 15 in groups 1,2 and 3 respectively]. Male and single born lambs was heavier than female and twinborn lambs [4.2,4.2 and 3.7, 3.5 respectively], but differences were not significant. However, these differences within each group were significant [P<0.05]. The effect weight of dam on the born weight was also significant [P<0.05]
Conclusion: the result of this study indicated that using of synthetic hormone caused length period of pamuition decreased. Also difference of age and weight of lambs are lower. Besides cueing the synthetic hormones caused that percentage of twining increased