limited information is available on water and nitrogen (n) management of sugarcane (saccharum officinarum l.) in khuzestan, southwestern iran, where this crop is currently and extensively grown under heavy irrigation and n fertilization. therefore, a field experiment was conducted from september 2000 to march 2002 at the research department of karoon agro-industry in khuzestan to determine the ...

Primiparous cows with low body condition at calving have an extended anovulatory period. Induction of ovulation and oestrus is possible with progesterone treatment but the response to this treatment differs between Friesian and Jersey breeds. The objective of this study was to describe changes in pulsatile LH secretion and the synchrony of developing ovarian follicles that occur during a proges...

A total number of 1243 records of calving cases of 585 dairy Friesian cows during 8 consecutive years from 1997 to 2004 collected from Sakha Animal Production Research Station belonging to Animal Production Research Institute, Agriculture Research Center were used to study the effect of sire, live body weight (LBW) and age of dam and calving season on twinning rate and its consequent effects on...

The aim of our study was to estimate effects of polymorphisms in the ATP-binding cassette G2 (ABCG2), fatty acid synthase (FASN), oxidized low-density lipoprotein receptor 1 (OLR1), peroxysome proliferator-activated receptor-gamma coactivator-1alpha (PPARGC1A), prolactin (PRL) and signal transducer and activator of transcription 5A (STAT5A) genes on milk production traits and detailed milk-fat ...

Fifteen weaned calves (age 89-141 days) were treated with dexamethasone (0.25 mg/kg, IV) for 3 days before, the day of, and the day after inoculation with 10 colony-forming units of either Escherichia coli O157:H7 (strain 86-24, which produces Shiga toxin 2 and intimin; n = 13) or nonpathogenic E. coli (strain 123, which does not produce Shiga toxin or intimin; n = 2). All calves were necropsie...

The objective was to merge science and practice determine the feasibility of a mixed suckling milking system compared with traditional exclusive management on production performance dairy sheep their progeny in an outdoor pasture-based farming at commercial scale. At 14 d postpartum, twin- triplet-bearing mixed-age East Friesian ewes were randomly allocated either once-a-day milking,suckling ea...

Aim of study: To evaluate the effect time pasture allocation (PA) and grass silage allocations on dry matter (DM) intake, grazing behaviour, milk production, rumen function N partitioning dairy cows.Area Valdivia, ChileMaterial methods: Forty-five Holstein-Friesian cows were selected from Austral Agricultural Research Station at Universidad de Chile. Cows allocated to one three treatments: MPA:...

OBJECTIVES This is the first investigation of dietary practices amongst multiple early medieval populations (AD 500-1000) from Wales and the Isle of Man using carbon, nitrogen, and sulphur isotope analysis. The analysis will illuminate similarities or differences between the diets and subsistence strategies of populations occupying different geographical regions, specifically those living in ma...