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16.
17.

and concentrate intake (2 vs. 8 Kg of concentrate/cow, oftered twice a day). The follicular development was evaluated daily by ultrasound and the two biggest follicle were aspirated at days 0,7, 14, 21 and 28 for P4, E2, IGF-I assay and to start a new follicular wave. Daily blood samples for P4 assay were collected, in the moming, just before oftering the concentrate and 4 hours afterwards. Blood samples for P4 and LH assay were collected every 15 min for 6h at days O, 14 and 28. In Exp. 2 non-Iactating Holstein cows (n=7), synchronized with the same protocol, at d-O (2ndGnRH day) were divided in 2 groups: 8Kg or 2Kg of concentrate/cow, one replicate was realized. As in the Exp. 1 blood samples for P4 assay were collected and ultrasound exams were realized daily. The uterine PGF2a production was measured after 100UI oxytocin Lv. injection on d17, using the PGF2a metabolite (PGFM), as an indicator. The hormonal concentrations were determined by RIA. The data were analyzed by PROC GLM and MIXED of SAS. In Exp. 1 the interaction between number of CIDR, feed intake and day on P4 concentration was detected just before feed intake (P<0.01) and 4h afterwards (P=0.02) / Efeito da quantidade de concentrado da dieta de vacas holandesas não-lactantes na progesterona plasmática, composição do fluído folicular e produção de prostaglandina pelo endométrio / 20051216

Jaboticabal; s.n; 16/12/2005. 102 p.
Tese em Português | VETTESES | ID: vtt-7899
Resultados 1 - 17 de 17