Lifetime Production Performance by Suffolk x Rambouillet Ewes in Northwestern Kansas
نویسندگان
چکیده
منابع مشابه
Estrual activity in open Rambouillet ewes.
T HE ewe is generally considered to be seasonally polyestrual in that she exhibits one or more diestrual cycles during a particular season of the year (Frank and Appelby, 1943). However, estrual activity may vary from the monestrual type exhibited by the wild sheep (Asdell, 1946) to the completely polyestrual type of some breeds in certain locations (Roberts, 1921; Kupfer, 1928; Quinlan and Mar...
متن کاملReproductive performance of Suffolk and Suffolk-cross ewes and ewe lambs exposed to vasectomized rams before breeding.
Multiparous Suffolk and Suffolk-cross ewes were randomly allotted to treatments within breed and year to measure effects of ram exposure, during transition from anestrus to breeding activity, on reproductive performance. Treatments were: 1) ewes joined with two mature vasectomized Rambouillet rams for 15 d before breeding (DC), 2) ewes maintained across a net wire fence from two vasectomized ra...
متن کاملRelationships among heat production, body weight, and age in Suffolk and Texel ewes.
The objective of this study was to test the null hypothesis that heat production (HP) was equivalent between Suffolk and Texel ewes at common fasted BW and at common ages. Open-circuit respiration calorimetry was used to estimate HP in 48 Suffolk and 48 Texel ewes at eight ages (10, 15, 20, and 28 wk of age and 1.5, 2.5, 3.5, and 4.5 yr of age). Sheep were individually penned in an environmenta...
متن کاملEffect of subacute dietary nitrate on production traits and plasma analytes in Suffolk ewes.
Elevated dietary nitrate (NO3-) is associated with production losses in ruminant livestock, resulting in substantial economic losses incurred by producers. Severe drought, fertilization practices and poorly maintained pastures increase the risk of elevated NO3- intake among cattle and sheep. Nitrate is metabolized to nitrite (NO2-) in the rumen and further reduced to ammonia. Ruminants consumin...
متن کاملLifetime production of 1/4 and 1/2 Finnsheep ewes from Rambouillet, Targhee and Columbia dams as affected by natural attrition.
Lifetime production of first-generation 1/4 and 1/2 Finnsheep crossbred ewes from Rambouillet (R), Targhee (T) and Columbia (C) dams was compared with that from randomly selected purebred R, T and C ewes. All 1,190 ewes, representing nine breed groups, were managed under range conditions and mated annually to Suffolk rams. Lifetime production was evaluated as the total lamb and total wool produ...
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ژورنال
عنوان ژورنال: Kansas Agricultural Experiment Station Research Reports
سال: 1995
ISSN: 2378-5977
DOI: 10.4148/2378-5977.7316