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Effects of feeding level before and after calving, and restricted suckling frequency on postpartum reproductive and productive performance of Sarda and Charolais x Sarda beef cows

Marongiu, Maria Laura and Molle, Giovanni and San Juan, Luis and Bomboi, Giovanni Cristoforo and Ligios, Ciriaco and Sanna, A. and Casu, Sara and Diskin, Michael G. (2002) Effects of feeding level before and after calving, and restricted suckling frequency on postpartum reproductive and productive performance of Sarda and Charolais x Sarda beef cows. Livestock Production Science, Vol. 77 (2), p. 339-348. ISSN 0301-6226. Article.

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DOI: 10.1016/S0301-6226(02)00028-3

Abstract

Two experiments were carried out on 48 Sarda (Sa) and 48 Charolais x Sarda (F1) grazing cows using a factorial design: 2 genotypesx2 feeding levels targeted to low (2, L) and high (3, H) body condition scores (BCS) at calving and in the following 3 monthsx2 suckling frequencies. These were ad libitum suckling (ADLIB) versus restricted (RESTR) to one suckling per day (45-90 days postpartum) in experiment 1 and ad libitum suckling (ADLIB) versus isolated (ISOL, one suckling daily between days 25 and 50 with no visual or auditory contacts between dams and calves outside the daily suckling period) in experiment 2. In experiment 1 postpartum anoestrus interval (PPI) was shorter in SaL than in F1L cows (P<0.01). In experiment 2 BCS around calving exerted an overriding effect on PPI; Sa cows tended (P<0.08) towards shorter PPI than F1 cows. Conception rate (CR) was higher in the 4th month postpartum in SaL than in F1L cows in experiment 1 (95 vs. 57%, P<0.01) and in H than in L cows (58 vs. 14%, P<0.001) in experiment 2. Suckling frequency affected CR of F1 cows by the 8th month postpartum in experiment 2: it was 90% in F1 ISOL cows and just 55% in F1 ADLIB cows (P<0.02). It is concluded that in the less favoured areas of Sardinia, the Sarda breed gives better reproductive performance than F1 cows while maintained at low BCS during the calving period. Cross-bred, but not pure Sarda cows, can benefit from the implementation of suckling restriction with strict calf isolation.

Item Type:Article
ID Code:5260
Status:Published
Refereed:Yes
Uncontrolled Keywords:Beef cattle, postpartum anoestrus, body condition score, suckling frequency
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/20 Zoocolture
Area 07 - Scienze agrarie e veterinarie > VET/02 Fisiologia veterinaria
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze zootecniche
002 Altri enti e centri di ricerca del Nord Sardegna > Istituto zootecnico e caseario per la Sardegna, Olmedo
001 Università di Sassari > 01 Dipartimenti > Biologia animale
Publisher:Elsevier
ISSN:0301-6226
Copyright Holders:© 2002 Elsevier Science
Deposited On:17 Dec 2010 17:20

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