Table Of Content

Livestock Production Science, 31 (1992) 371-372 Elsevier Science Publishers B.V., Amsterdam Contents of Livestock Production Science, Volume 31 VOL. 31 NOS. 1,2 MAY 1992 Foreword Modelling of nitrogen transactions in the dairy cow and their environmental consequences R.J. Dewhurst and C. Thomas (Auchincruive, Scotland, UK) The nitrogen balance on intensive Dutch dairy farms: a review H. Korevaar (Wageningen, Netherlands ) Alternative dairy cattle system — computer simulated environmental and economic results related to the use of slurry J.P. Hansen and V. Ostergaard (Tjele, Denmark ) Manure legislation effects on income and on N, P and K losses in dairy farming P.B.M. Berentsen, G.W.J. Giesen and S.C. Verduyn (Wageningen, Netherlands ) Volatile emissions of housing systems for cattle J.H. Voorburg and W. Kroodsma (Wageningen, Netherlands) Abstracts of cattle section Alteration of nutrition as a means to reduce environmental pollution by pigs A.W. Jongbloed and N.P. Lenis (Lelystad, Netherlands) Development of a calculation model for predicting the amount of N excreted by the pig: effect of feeding, physiological stage and performance J.Y. Dourmad (Saint Gilles, France) ,D . Guillou (Chateau-Thierry, France) and J. Noblet (Saint Gilles, France) Effect of protein content of the diet on nitrogen excretion by pigs F. Gatel and F. Grosjean (Villerable, France ) Reduction of ammonia volatilization from pig houses using aerated slurry as recirculation liquid P. Hoekstra (Wageningen, Netherlands), N. Verdoes (Rosmalen, Netherlands), J. Oosthoek (Wageningen, Netherlands) and J.A.M. Voermans (Rosmalen, Netherlands) A mathematical model for estimating the amount and composition of slurry from fattening pigs A.J.A. Aarnink, E.N.J. van Ouwerkerk and M.W.A. Verstegen (Wageningen, Netherlands ) Abstracts of pig section VOL. 31 NOS. 3,4 JUNE 1992 Applications of recombinant DNA technology to improve milk production: a review K. Stelwagen, A.M. Verrinder Gibbins and B.W. McBride (Guelph, Ont., Canada) Variance components due to direct and maternal effects for growth traits of Australian beef cattle K. Meyer (Armidale, N.S.W., Australia ) Genetic parameters for milk production and body size in New Zealand Holstein-Friesian and Jersey 0301-6226/92/$05.00 © 1992 Elsevier Science Publishers B.V. All rights reserved. 372 G. Ahlborn (Hamilton, New Zealand) and L. Dempfle (Freising-Weihenstephan, Germany) Genetic correlations between pubertal traits in bulls and heifers C.A. Morris, R.L. Baker and N.G. Cullen (Hamilton, New Zealand) Toward a new theory of feed intake regulation in ruminants 3. Optimum feed intake: in search of a physiological background J.J.M.H. Ketelaars and B.J. Tolkamp (Wageningen, Netherlands ) Growth and fertility traits of calves sired by Piedmontese, Gelbvieh and Red Angus bulls D.A. Blasi, W.D. Lamm, J.D. Tatum and J.S. Brinks (Fort Collins, CO, USA) Calcium, phosphorus, and magnesium absorption and secretion in the bovine digestive tract as influenced by dietary concentration of these elements G.R. Khorasani and D.G. Armstrong (Newcastle Upon Tyne, UK) Use of an animal model for genetic evaluation of the Lacaune dairy sheep F. Barillet (Castanet, France), D. Boichard, A. Barbat (Jouy-en Josas, France), J.M. Astruc (Castanet, France) and B. Bonaiti (Jouy-en-Josas, France ) Energetic value of whole cottonseeds fed for maintenance of sheep at 2 levels in the diet A. Arieli (Rehovot, Israel) Simplification of milk recording scheme in Latxa milking sheep G. Maria (Zaragoza, Spain) and D. Gabi~n a (V itoria-Gasteiz, Spain) Effects of bovine somatotrophin on insulin-like growth factor-I, insulin, growth and carcass composition of lambs J.J. Bass, S.C. Hodgkinson (Hamilton, New Zealand) , B.H. Breier (Auckland, New Zealand) ,W .d. Carter (Hamilton, New Zealand) and P.D. Gluckman (Auckland, New Zealand ) Growth, feed efficiency and body composition of transgenic mice expressing a sheep metallothionein |a-sheep growth hormone fusion gene D. Pomp (Davis, CA, USA), C.D. Naucarrow, K.A. Ward (N.S.W., Australia) and J.D. Murray (Davis, CA, USA) The possible role of existing models in on-farm decision support in dairy cattle and swine production A.W. Jalvingh (Wageningen, Netherlands Author Index