Comparison of weigh-suckle-weigh and machine milking for measuring ewe milk production.

Abstract

Thirteen crossbred ewes were used to compare weigh-suckle-weigh (WSW) and machine milking (MM) methods for determining milk production of ewes that were rearing single or twin lambs. At parturition, ewes were 13 mo of age and produced six single lambs and seven pairs of twin lambs. Milk production estimates were initiated on d 6 of lactation and a 3-d rotation of the two techniques was implemented. On d 6, milk production was measured using WSW; on d 7, MM was used. No measurement was made on d 8. The 3-d rotation was repeated 20 times throughout a 63-d lactation, resulting in 20 point estimates of milk production for each method of measurement for each ewe. The WSW procedure consisted of a 3-h period in which lambs were withheld from suckling their dams. This was followed by a suckling period, a second 3-h withholding period, and a second suckling period. Differences in pre- and postsuckling lamb weights of the second suckling period were defined as milk consumption and, indirectly, 3-h milk production. The MM procedure included an administration of 10 IU of oxytocin (i.v.), followed by evacuation of the udder with a machine using commercially available sheep milking equipment, and the milk was discarded. Lambs were withheld from suckling the ewes for a 3-h period, followed by a repetition of the oxytocin and machine milking procedures. Milk from the second milking was weighed. Milk production estimates determined using the WSW and MM techniques were similar (P = .42). Average 3-h milk production was 340 and 351 g for WSW and MM, respectively. Machine milking provides a reliable tool in evaluating the milk-producing ability of ewes that are rearing single or twin lambs.

Caloric stress alters fat characteristics and Hsp70 expression in milk somatic cells of lactating beef cows

“…This technique is one of the most frequently cited methods for the measurement of milk production, and in spite of some limitations, similar result may be determined when using it in comparison with milking machine (Benson et al 1999). Cows and calves were separated 16 h before sampling.…”

Efeito do óleo de arroz na ração sobre a produção e composição química do leite de ovelhas Corriedale

“…A avaliação da produção de leite em 12 horas foi realizada através da pesagem do conteúdo total de esgotamento da glândula mamaria de cada ovelha. Na correção da produção para 24 horas utilizou-se metodologia citada por Benson et al (1999). Para a avaliação da composição química (proteína, lactose, gordura e sólidos totais) a cada ordenha coletava-se 5 mL de leite, que era acrescido de conservante Bromopol ® e enviado ao Laboratório de Qualidade de Leite da EMBRAPA Clima Temperado.…”

Bafra koyunlarında bazı meme özellikleri ve kuzularda büyüme ile bu özelliklerin farklı süt kontrol yöntemleriyle tespit edilen süt verimi ve sağım özellikleriyle fenotipik korelasyonları

“…Elle sağım, makineli sağım, oksitosin enjeksiyonu + makineli sağım ve tart-emzir-tart bu yöntemler arasındadır (1,7,8,16,19). Türkiye' de koyunlarda süt verimi ile ilgili çalışmalarda genellikle elle sağım yöntemi kullanılmıştır.…”

“…(7,8,19). Kuzuların tartılmasında 20 g' a duyarlı ve 150 kg çekerli elektronik kantar kullanılmıştır.…”