Grass and Forage Science
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A TWO‐STAGE TECHNIQUE FOR THE IN VITRO DIGESTION OF FORAGE CROPS
Grass and Forage Science - Tập 18 Số 2 - Trang 104-111 - 1963
A simple technique for the determination in vitro of the dry‐ or organic‐matter
digestibility of small (0·5 g) samples of dried forages is described. It
involves incubation first with rumen liquor and then with acid pepsin. Using 146
samples of grass, clover and lucerne of known in vivo digestibility (Y), the
regression equation Y= 0·99 X– 1·01 (S.E. ± 2·31) has been calculated, where
X=in vitro d...
On the analysis of dacron bag data for low degradability feeds
Grass and Forage Science - Tập 43 Số 4 - Trang 441-444 - 1988
AbstractThe effect of lag phase on the estimates of parameters from the analysis
of dacron bags is investigated. Simultaneous estimation of the lag parameter
within the McDonald model is shown to be advantageous.
Increased concentration of water‐soluble carbohydrate in perennial ryegrass (Lolium perenne L.): milk production from late‐lactation dairy cows
Grass and Forage Science - Tập 56 Số 4 - Trang 383-394 - 2001
Eight multiparous Holstein–Friesian dairy cows in late lactation were used to
investigate the potential of using perennial ryegrass with a high concentration
of water‐soluble carbohydrate (WSC) to increase the efficiency of milk
production. After a pretreatment period on a common pasture, the cows were each
given ad libitum access to one of two varieties of zero‐grazed grass
continuously for 3 wee...
Increased concentration of water‐soluble carbohydrate in perennial ryegrass (Lolium perenne L.). Evaluation in dairy cows in early lactation
Grass and Forage Science - Tập 61 Số 1 - Trang 52-59 - 2006
AbstractTwelve multiparous Holstein–Friesian dairy cows in early lactation were
used to investigate the potential of using perennial ryegrass (Lolium perenne)
with a high concentration of water‐soluble carbohydrates (WSC) to increase the
efficiency of milk production. Ad libitum access to one of two varieties of
zero‐grazed herbage was given continuously for 3 weeks: treatment High Sugar
(HS), an ...
Individual and socially learned preferences for biserrula (Biserrula pelecinus L.) in sheep
Grass and Forage Science - Tập 70 Số 2 - Trang 374-380 - 2015
AbstractThis study examined how sheep develop a learned aversion to the annual
legume biserrula (Biserrula pelecinus L.). Merino sheep were grazed on paddocks
sown with either (i) biserrula, (ii) biserrula + ryegrass (Lolium rigidum
Gaud.), (iii) crimson clover (Trifolium incarnatum L.), (iv) crimson
clover + ryegrass or (v) ryegrass, for 4 weeks. Relative preference
(Chesson–Manly selection index...
THE INFLUENCE OF SEVERAL FACTORS IN DETERMINING THE GRAZING BEHAVIOUR OF BORDER LEICESTER × MERINO SHEEP
Grass and Forage Science - Tập 17 Số 1 - Trang 41-51 - 1962
Over a period of 20 months twenty continuous, 24‐hour, observations were made on
the grazing behaviour of Border Leicester × Merino sheep. Distinct seasonal
changes were found in the pattern of grazing. Grazing usually began during the
dawn period and decreased at dusk. In spring and summer there were two peaks of
grazing, but there was only one peak in autumn and winter. The percentage of
grazing...
Selective defoliation by sheep according to slope and plant species in the hill country of New Zealand
Grass and Forage Science - Tập 58 Số 4 - Trang 339-349 - 2003
AbstractThe objective of the study was to evaluate the grazing behaviour by
sheep in hill country paddocks in New Zealand which had received two long‐term
fertilization and stocking rate treatments [high fertility–high stocking rate
(HH); low fertility–low stocking rate (LL)]. Herbage accumulation and selective
grazing were evaluated within low slope (LS), medium slope (MS) and high slope
(HS) cat...
How do severity and frequency of grazing affect sward characteristics and the choices of sheep during the grazing season?
Grass and Forage Science - Tập 58 Số 2 - Trang 138-150 - 2003
AbstractThe effect of grazing frequency and severity on sward characteristics
and preferences by sheep was investigated from April to September. Two levels of
grazing severity were imposed by varying the numbers of ewes grazing 200 m2
plots for 24 h: four (S, severe) or two (L, lax) ewes. Grazing frequency was
either 1 d week−1 (F, frequent) or 1 d every 2 weeks (I, infrequent). By
combining frequ...
Chemical Composition, in vitro digestibility and in vitro VTA concentrations of New Mexico native forages
Grass and Forage Science - Tập 44 Số 1 - Trang 101-105 - 1989
AbstractComparative chemical composition, in vitro digestibility, and in vitro
volatile fatty acid (VFA) concentration and molar proportions of current year's
growth of twelve important native New Mexico forage species were evaluated.
Volatile fatty acid data were collected on forage samples subjected to 12‐h in
vitro digestion using two different inoculum sources. Forbs and shrubs had
higher (P<0...
The effect of ensiling and fractionation on the suitability for combustion of three common grassland species at sequential harvest dates
Grass and Forage Science - Tập 67 Số 4 - Trang 559-568 - 2012
AbstractIn a Green Biorefinery processing green biomass, one possible
application for the press‐cake fraction is as biomass fuel for combustion. In an
industrial setting, the preservation of herbage as silage and its subsequent
fractionation into press‐juice and press‐cake fractions represent the two major
process steps in the utilization of green biomass. This study investigated (i)
the effects o...
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