نتایج جستجو برای: grazing dairy cattle

تعداد نتایج: 98366  

2013
Mohammad Chamani

The aim of this study was to investigate the behavior of cattle and sheep grazing and expression of behavioral differences between cattle and sheep is because, to thereby allow grazing management strategies amid animal feed. Grazing circumstances, the daily consumption and duration is grazing, it can result from consumption of feed bite mass (mass and carved teeth) and tooth cutting (bite rate)...

2010
John D. Arthington

Introduction Pasture forage is the most significant contributor to the trace mineral nutrition of Florida's grazing beef cattle. Sandy, loworganic-matter soils have long been linked to the production of forages with low trace mineral content. In addition, the organic soils associated with the Okeechobee basin have been associated with the production of forages high in molybdenum, an antagonist ...

1998
JOHN W. WALKER RODNEY K. HEITSCHMIDT

Research was conducted on the effects of rotational grazing (RG) compared to continuous grazing (CG) on the behavior of cattle grazing on rangelands. Different livestock den&tics in the RG treatments were created by varying the size of paddocks in a 4651a, U-paddock, cell deaigntd RG treatment stocked at a rate of 3.6 ha/cow/yr. Paddock sizes of 30 and lo-ha were used to simulate RG with 14 (RG...

Journal: :Journal of dairy science 2002
P J Kononoff H A Lehman A J Heinrichs

Detailed knowledge of chewing and rumination activities is critical to fully understand the dietary factors affecting normal rumen function. An automatic system for the digital recording of the jaw movements in free-ranging grazing cattle has been described, but its ability to measure chewing activity of cattle housed in confinement and fed total mixed rations has not yet been evaluated. The ea...

2003
D. W. BAILEY

Bailey, D.W., Walker, J.W. and Rittenhouse, L.R., 1990. Sequential analysis of cattle location: day-to-day movement patterns. Appl. Anita. Behav. Sci., 25: 137-148. Studies were conducted in Texas and Colorado to determine if there were consistent movement patterns of grazing cattle. Based on optimal foraging theory, we hypothesized that cattle would select the same area of a pasture to graze f...

1976
DAVID MATLAGA KEITH KAROLY

The effect of cattle grazing on the genetic structure of native grass populations has received little attention. We investigated the effect of cattle grazing on genetic variation in Idaho fescue (Festuca idahoensis Elmer) using ISSR (inter-simple sequence repeat) DNA markers. The ISSR markers are hypervariable and are generally interpreted as being selectively neutral. Idaho fescue tillers were...

M.A. Baset M.M.H. Khan M.N. Uddin, M.R. Akanda M.R. Islam, S.A. Belal,

Milk urea nitrogen (MUN) of dairy cows was determined in relation to breed. A total of forty (40) Pabna and red Chittagong dairy cattle each of twenty (20) were selected to know the milk composition, nutritional status and milk urea nitrogen. Live weight of Pabna Cattle (187±14 kg) was higher than that of red Chittagong cattle (174±4 kg). In Pabna cattle milk yield (4.94 kg), minerals (0.15%) a...

ژورنال: Medical Laboratory Journal 2017
Abiri, Zeinab, Akbari, Sajad, Khalili, Mohammad, Shajeie, Arvin ,

ABSTRACT        Background and Objectives: Q fever is a zoonotic disease caused by an obligate gram-negative intracellular pathogen called Coxiella burnetii. The aim of this study was to determine the seroprevalence of anti-C. burnetii antibodies in bulk tank milk (BTM) samples of dairy cattle in west and northwest of Iran.        Me...

Journal: :international journal of environmental research 2014
m. manubolu s. eklund p.c. dutta f. malmlöf

cyanobacteria blooms are common in baltic sea and their intensity have been increased due toanthropogenic eutrophication. in this study we investigated the cyanotoxin levels in the water samplescollected from four different locations in the baltic sea at three different seasons including summer 2011.protein phosphatase 2a (pp2a) inhibition assays, enzyme-linked immunosorbent assays (elisa) and ...

2003
I R Johnson D F Chapman A J Parsons J Eckard W J Fulkerson

Abstract DairyMod is a biophysical simulation model of the dairy pasture system. It has been designed to explore dairy pasture management and incorporates the principal rotational grazing management strategies that are used in Australia. It also includes full treatment of the fluxes of water and nutrients in the grazing system, and therefore it also has utility in analyzing changes in resource ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید