جستجوی مقالات مرتبط با کلیدواژه "dried tomato pulp" در نشریات گروه "علوم دام"

In the research the genetic investigation productive and reproductive traits and changes trend the traits in years, seasons and different lactation periods and genetic evaluation cows and bulls of 785 records for milk and 665 records for fat yield and reproductive information during years 1998 to 2003 of 207 dairy cows ghezlagh farm aboureyhan campus (university of Tehran) studied. The least square mean and standard error (LSM ± SE) of milk yield (3x, 305, ME) and fat yield were 6305.6 ± 87.7 and 206.1 ± 1.7 kg, respectively. The least square means (± SE ) of calving interval , open days ,dry days, age at first calving and gestation length were 403.2 (± 6.7 ), 117.5 (± 6.8 ), 86.8 (± 7.3), 760.3 (± 9.7 ), 278.1 (± 0.7 ), respectively and insemination rate was 1.8 (±0.04). The effect of environmental factors of lactation period on milk production, persistency and insemination rate; year of parturition on milk and fat production, calving interval, insemination rate and age at first calving, dry days; and calving season on milk production and insemination rate were significant. Estimated heritabilities and standard error for milk and fat yield using Repeatability Record Animal Model (RRAM), were 0.22 (± 0.12) and 0.29 (± 0.05), respectively. Genetic and environmental trend of production traits during years 1998 to 2003 were positive. The breeding value of the animals for production traits predicted with Animal Model method and the superior families were ranked

In a 3×3 Latin square design, 9 ok and multipaous lactating Holstein cows averaging 76 ± 12 days in milk and 580±48 kg of body weight were assigned to three dietary treatments in 3 periods of 21 days. Dietary treatments were 1) the control diet (without dried or ensiled tomato pulp), 2) diet with 8% dried tomato pulp (DM basis) and 3) diet with 8% ensiled tomato pulp silage (DM basis). Tomato pulp either dried or ensiled was substituted with whole barley silage and cotton seed meal. Dry matter intake, milk composition, blood metabolites and nutrient digestibility were not affected significantly by the treatments. Milk production was increased significantly in response to tomato pomace substitution and reached to 41.36 and 41.16 kg/d for the diets containing dried and ensiled tomato pulp respectively in comparison with the control diet (treatment). Total chewing and rumination times did not differ between the treatments. Ruminal pH of cows fed diet containing ensiled tomato pulp was significantly (P≤0.05) lower than the control diet. No seed was germinated in germination test possibly due to the application of high temperature during paste production process. It was concluded that inclusion of 8-10% tomato pulp in dry or ensiled forms in the dairy diets could reduced the cost of feed without any adverse effect on the cow's performances