نوع مقاله : فیزیولوژی (جانوری)
نویسندگان
گروه علوم دامی، دانشکده کشاورزی، واحد ورامین- پیشوا، دانشگاه آزاد اسلامی ورامین، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
A present study was carried out to determine the effects of replacing guar meal with soybean on blood parameters and milk production factors of Holstein dairy cow. Experiments were conducted in two stages to compare the nutritional quality of guar meal with soybean meal in diets of Holstein cows. In the first stage chemical composition were evaluated for two this meals. In the second stage meal effect were examined on the parameters of feeding behavior, and blood metabolites and milk production of lactating Holstein cows. Eight Holstein cows were selected based on milk production of 305 days ago, parturition and the expected date of birth for the second step of test and randomly divided into two groups, 4 cows in each group. Selected cows were fed with feed containing protein and energy the same treatment containing 15% soybean meal (without the use of guar meal) and two treatments with 15% guar meal (without the use of soybean meal) from 5 to 56 days postpartum. Crude protein, crude fat and ash guar meal was lower than soybean meal, but the ADF and NDF in soybean meal was higher than guar meal. Based on results, there was not observed significant difference between plasma glucose cattle (0.05 <p) but minor differences was observed between two treatments. Blood glucose increased in 15% guar meal treatment compared to the other treatments. Effects of treatments did not caused significant difference between plasma amylase aspartate enzymes between treatments. However, guar meal treated 15 percent to control gender was an increase in the number of these enzymes. Statistical analysis of the data showed that the treatment with the lowest fat percentage has a positive relationship with milk protein synthesis. But statistically, in the daily production of milk were observed significant differences between treatments. Based on results of this study, guar meal is a suitable alternative for protein.
کلیدواژهها [English]
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