Data/hora: 26/04/2024 16:06:44

Biblioteca(s): 	Embrapa Caprinos e Ovinos.	
Data corrente: 	18/09/2017	
Data da última atualização: 	18/09/2017	
Autoria: 	ENGLE, P. H.; BELL, D. S.; DAVIS, R. R.	
Título: 	The effect of ladino clover, birdsfoot trefoil and bluegrass pasture on the rate of conception among ewes.	
Ano de publicação: 	1957	
Fonte/Imprenta: 	Journal of Animal Science, v. 16, n. 3, p. 703-710, Aug. 1957.	
DOI: 	10.2527/1957.163703x	
Idioma: 	Inglês	
Conteúdo: 	Abstract: A number of experiments have shown that the kind and amount of feed ewes obtain just prior to and during the breeding season may affect the ewe?s reproductive performance. On the one hand, the work of Marshall and Potts (1924), Clark (1934), Bell (1932), Briggs et al. 1942, Wallace (1951), El-Shiekh et al. 1955, and others has led to the understanding that ?flushing? ewes under certain conditions increases the ovulation and the conception rates and, hence, we know that nutritive level may condition the fertility level. On the other hand, the work of Hunt (1937) and the North Carolina Agricultural Experiment Station (1944) associating a reproductive problem with the feeding of soybean hay, and the work of Bennetts et al. 1946, and subsequent work on this problem which related impaired breeding to the unfavorable estrogenic activity of genestein found in subterranean clover introduces the point that some component in a feed may impair reproductive function in sheep. For a number of years there has been a growing suspicion based on circumstantial evidence that the kind of pasture on which ewes graze prior to and during the breeding season affected their conception rate at mating time. This investigation was initiated to study the influence of grazing ladino clover, birdsfoot trefoil and bluegrass pasture on the reproductive performance of ewes. Materials and Methods Ladino clover (Trifollium repens Var. ladino) and birdsfoot trefoil (Lotus corniculatis) pastures, each 8 acres in size, were seeded in the spring of 1952 and additional plots of each	
Thesagro: 	Lotus Corniculatus.	
Thesaurus Nal: 	Ewes; Reproductive performance; Sheep.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
Registro original: 	Embrapa Caprinos e Ovinos (CNPC)	
Exemplares: 	CNPC - (34904-1) - ADD - AP - PP -  -  -  - DIS