نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه علوم دامی، دانشکده کشاورزی، دانشگاه زنجان، زنجان. ایران.
2 گروه علوم دامی،دانشکده کشاورزی، دانشگاه زنجان،زنجان، ایران
3 مرکز تحقیقات کشاورزی و منابع طبیعی چهار محال و بختیاری، تحقیقات علوم دامی، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
This study aimed to investigate the effect of feeding top dress Hydroxy Seleno Methionine (HSM) and cotton seed bioactive peptide (CSBP) on body condition, health of the reproductive system and subsequent pregnancy of dairy cows. For this purpose, one hundred and eighty multiparous Holstein cows 21 days prior to the expected calving date were assigned to one of four experimental treatments of a randomized complete block design in a 2x2 factorial arrangement: 1) Basal diet (containing mineral selenium as per NRC (2001) recommendations without peptide; 2) Basal diet plus 300 g bioactive peptide; 3) Basal diet plus 1.2 mg organic selenium per kg of dry matter without bioactive peptides; 4) Basal diet plus 1.2 mg organic selenium per kg of dry matter plus 300 grams of bioactive peptide. The inclusion of HSM during the prepartum period resulted in a higher BCS in postpartum and smaller increase in BCS during prepartumd (P<0.01). Additionally, there was a significant interaction effect between HSM and CSBP on BCS (P<0.02) and its changes (P<0.01) during the post-partum periods. The presence of ovarian cysts, number of inseminations per pregnancy, the endometrium and uterine regression scores and pregnancy during the first insemination was not influenced by any of the experimental treatments (P>0.1). However, HSM had a positive effect on pregnancy during the second insemination (P<0.05). It can be concluded that supplementing HSM could reduce the BCS changes before and after parturition and subsequent to that, it leads to an enhancement in the pregnancy during the second insemination.
کلیدواژهها [English]