Eficiência produtiva e reprodutiva de vacas de corte Purunã de diferentes categorias

Content Provider	Semantic Scholar
Author	Moura, Ivan César Furmann Kuss, Fernando Moletta, José Luis Menezes, Luís Fernando Glasenapp Henrique, Douglas Sampaio Cherubin, Antonio
Copyright Year	2014
Abstract	This study was conducted at Fazenda Modelo an Experimental Estation belonged to the Instituto Agronomico do Parana. (IAPAR), in the city of Ponta Grossa - PR, in the period from June2011 to March 2012.Puruna bovine females (n = 159) class were divided into three categories as follows: young cows (33-36 months old) adult cows (43-90 months old) and older cows (> 90 months).The negative energy balance was evident in all categories of cows with weight loss above 13 kg to 60 days postpartum. The pregnancy rate did not differ significantly among the three categories were 93% for young cows, old cows for 94% and 96% for adult cows. Adult cows weaned calves with higher weaning weight (221.20 kg) as compared to young cows (190.00 kilograms) and old (205.19 kg). Rates of the pregnant cow herd were not influenced by the category of beef cows when maintained in good body condition and nutritional at calving and during the breeding season. In these circumstances, young cows bred at two years of age are similar to productive and reproductive performance of mature cows, while the category of old cows has the lowest reproductive efficiency of breeding squad.
Starting Page	2555
Ending Page	2562
Page Count	8
File Format	PDF HTM / HTML
DOI	10.5433/1679-0359.2014v35n4Suplp2555
Volume Number	35
Alternate Webpage(s)	http://www.uel.br/revistas/uel/index.php/semagrarias/article/download/14181/15524
Alternate Webpage(s)	https://doi.org/10.5433/1679-0359.2014v35n4Suplp2555
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article