Journal of Agricultural Science

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Determination of nitrogen in soil by the Kjeldahl method
Journal of Agricultural Science - Tập 55 Số 1 - Trang 11-33 - 1960
J. M. Bremner
1. The reliability of the Kjeldahl method for the determination of nitrogen in soils has been investigated using a range of soils containing from 0·03 to 2·7% nitrogen.2. The same result was obtained when soil was analysed by a variety of Kjeldahl procedures which included methods known to recover various forms of nitrogen not determined by Kjeldahl procedures commonly emp...... hiện toàn bộ
Nutritional and immunological importance of colostrum for the new-born pig
Journal of Agricultural Science - Tập 143 Số 6 - Trang 469-485 - 2005
Jean Le Dividich, J.A. Rooke, Patrick Herpin
The nutritional and immunological importance of colostrum for the survival and development of the neonatal pig are reviewed. The pig is born with low body energy stores and devoid of serum immunoglobulins. Colostrum provides the piglet with both energy and maternal antibodies but its fat and protein composition is very variable. Colostrum is very digestible, and both colostral energy and n...... hiện toàn bộ
Analysis of effects in wheat of high temperature on grain filling attributes estimated from mathematical models of grain filling
Journal of Agricultural Science - Tập 141 Số 2 - Trang 203-212 - 2003
M. Zahedi, C. F. Jenner
Compared with growth at 20/15°C (day/night), exposure of wheat (Triticum aestivum L.) plants to moderately high temperature (30/25°C) significantly decreased grain weight through shortening the duration of grain filling, combined with small (or no) positive increases in the rate of grain filling. Several mathematical models of grain filling were assessed for thei...... hiện toàn bộ
The relationship of grain filling with abscisic acid and ethylene under non-flooded mulching cultivation
Journal of Agricultural Science - Tập 147 Số 4 - Trang 423-436 - 2009
Z. C. ZHANG, Yaguang Xue, Z. Q. Wang, Jianchang Yang, Jianhua Zhang
SUMMARYGrain filling is an intensive transportation process regulated by plant hormones. The present study investigated whether and how the interaction between abscisic acid (ABA) and ethylene is involved in mediating the grain filling of rice (Oryza sativaL.) under non-flooded mulching cultivation. A field experiment repeated over 2 year...... hiện toàn bộ
Observations on the effects of temperature and distance to water on the behaviour of Merino and Border Leicester sheep
Journal of Agricultural Science - Tập 82 Số 3 - Trang 383-390 - 1974
G. T. Daws, Victor R. Squires
SUMMARYThe effects of ambient temperature on the daily behaviour patterns and water consumption of Border Leicester and Merino wethers were examined in an experiment where food was supplied ad libitum at points ranging from 2·4 to 5·6 km from water. The data were collected during a 12-week period when daily maximum temperatures ranged fro...... hiện toàn bộ
The ability of sheep at different stocking rates to maintain the quality and quantity of their diet during the grazing season
Journal of Agricultural Science - Tập 140 Số 1 - Trang 113-124 - 2003
Florence Garcia-Launay, Pascal Carrère, Jean‐François Soussana, René Baumont
The degree to which grazers maintain the amount (organic matter intake) or the quality (organic matter digestibility) of their diet without adversely affecting the other component was addressed by investigating how sheep managed trade-offs between quantity and quality throughout the grazing season in an upland area of central France. Two groups of five dry ewes, grazing two plots of contra...... hiện toàn bộ
Selection of diets by dual-purpose Mamber goats in Mediterranean woodland
Journal of Agricultural Science - Tập 131 Số 2 - Trang 221-228 - 1998
Dorit Kababya, Avi Perevolotsky, I. Bruckental, S. Landau
The feeding behaviour of Mamber dairy goats grazing on Mediterranean woodland in the Upper Galilee mountains of Israel was studied throughout a year (1991/92). The percentages of crude protein (CP), neutral detergent fibre (NDF), acid detergent fibre (ADF), acid detergent lignin (ADL) and condensed tannins (CT) were determined in samples collected by hand to simulate the plant pa...... hiện toàn bộ
Voluntary intake and digestion of gorse (Ulex europaeus) by goats and sheep
Journal of Agricultural Science - Tập 111 Số 1 - Trang 107-114 - 1988
J.C. Howe, T. N. Barry, A.I. Popay
SummaryGorse (Ulex europaeus) was harvested in late spring, summer, autumn and winter and fed to six goats kept individually in metabolism cages for 21-day periods. The same gorse was also fed to sheep during the first two periods, but not in autumn and winter, as the hardness and sharpness of the needles caused total rejection by the she...... hiện toàn bộ
Endoscopic observation of the reticulo-omasal orifice of cattle
Journal of Agricultural Science - Tập 101 Số 3 - Trang 749-751 - 1983
B.W. McBride, L. P. Milligan, B. V. Turner
A variety of factors influence the voluntary intake of ruminants including reticulo-rumen fill or distension (Campling & Balch, 1961; Welch, 1967; Grovum, 1979) and rate of passage of digesta through the gastrointestinal tract (Bines & Davey, 1970). The exit point of the reticulo-rumen, the reticulo-omasal orifice, potentially serves as a control site in regulation of particle move...... hiện toàn bộ
The fate and behaviour of imbibed water in the rumen of cattle
Journal of Agricultural Science - Tập 122 Số 1 - Trang 139-144 - 1994
L. M. Cafe, D. P. Poppi
SUMMARYThe quantity of imbibed water that bypassed the rumen directly or rapidly effluxed from the rumen was investigated in four steers offered water marked with CrEDTA. Water was offered for short periods designed to simulate the drinking patterns that occur under extensive grazing conditions. Animals were fed either low quality pangola hay in the long form or a ...... hiện toàn bộ
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