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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Different durations of whole raw soybean supplementation during the prepartum period: Milk fatty acid profile and oocyte and embryo quality of early-lactating Holstein cows

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Author(s):
Gardinal, R. [1] ; Calomeni, G. D. [1] ; Zanferari, F. [1] ; Vendramini, T. H. A. [1] ; Takiya, C. S. [1] ; Del Valle, T. A. [1] ; Renno, F. P. [1, 2]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Dept Anim Nutr & Prod, BR-13635900 Pirassununga - Brazil
[2] Natl Council Sci & Technol Dev, Bursar C 1, BR-716055001 Brasilia, DF - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF DAIRY SCIENCE; v. 101, n. 1, p. 675-689, JAN 2018.
Web of Science Citations: 2
Abstract

The objective of this study was to evaluate different durations of whole raw soybeans (WS) supplementation during the prepartum period on nutrient digestibility, milk yield and composition, energy balance, blood metabolites, and oocyte and embryo quality of transition cows. Thirty-one Holstein cows were used in a completely randomized design and assigned to 4 experimental groups (G): G90, G60, G30, and G0 (control), supplemented with a diet containing 12% of WS from 90, 60, 30, and 0 d relative to the calving date, respectively. Cows were dried off 60 d before the expected calving date. After parturition, all cows were fed a diet containing 12% of WS until 84 DIM. Blood samples were collected on d -49, -35, -21, -14, -7, 0, 7, 14, 21, 35, and 70 relative to partuin. Ovum pick-ups were performed on d 21 +/- 3, 42 +/- 7, 63 +/- 7, and 84 +/- 7 of lactation. Different durations of WS supplementation did not affect DMI and apparent total-tract digestibility in either the pre- or postpartum periods. Duration of WS supplementation had no effect on milk yield and composition nor energy balance of cows. However, the duration of WS supplementation had several effects on milk fatty acid (FA) profile of cows, including a linear decrease in concentrations of cis-9 C18:1, unsaturated C18, total monounsaturated, and unsaturated FA. Further, the milk contents of cis-9,cis-12 C18:2 FA, cis-9,trans-11 C18:2 FA, and total polyunsaturated FA were increased when WS were fed to cows from 30 d but: not from 60 or 90 d of the expected calving date. The length of WS supplementation in the prepartum period linearly increased blood cholesterol concentration of cows during the prepartum period, but. it had no effect on blood glucose and nonesterified FA concentrations in the pre- and postpartum periods. Duration of WS supplementation during the prepartum period increased the average number of grade 2 oocytes, notably in G60, but it had no effect on embryo production and cleavage proportion of early-lactalion cows. The duration of WS supplement at ion in the prepartum period had no effect on milk yield and energy balance of the subsequent lactation, but it altered milk FA profile in early lactation by decreasing unsaturated FA content, notably when starting to supplement WS at 90 and 60 d from the expected calving date. Our results also showed that the duration of WS supplementation during the prepartum period does not improve oocyte quality in the subsequent lactation of cows. (AU)

FAPESP's process: 12/02360-1 - Effect of prolonged dietary supplementation of unsaturated fatty acids on performance, oocyte and embryo quality, and immune function of dairy cows
Grantee:Rodrigo Gardinal
Support Opportunities: Scholarships in Brazil - Doctorate