Heat stress in dairy cattle under southern African conditions. II. Identification of areas of potential heat stress during summer by means of observed true and predicted temperature-humidity index values
| dc.contributor.author | Du Preez, J.H. | |
| dc.contributor.author | Giesecke, W.H. | |
| dc.contributor.author | Hattingh, P.J. | |
| dc.contributor.author | Eisenberg, B.E. | |
| dc.contributor.editor | Verwoerd, Daniel Wynand | |
| dc.date.accessioned | 2014-09-01T09:04:37Z | |
| dc.date.available | 2014-09-01T09:04:37Z | |
| dc.date.created | 2013 | |
| dc.date.issued | 1990 | |
| dc.description | The articles have been scanned in colour with a HP Scanjet 5590; 600dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format. | en |
| dc.description.abstract | November-March are the hottest months of the year with the highest monthly mean "temperature-humidity index" (THI) in South Africa and Namibia. These 5 months are associated with severe heat stress in dairy cattle, are of critical importance for their performance and may have great economic implications for the owner as well as for the dairy industry. Firstly, compared with the existing Livestock Weather Safety Index (LWSI), more relevant meteorological data can be generated when mapping South Africa and Namibia according to the LWSI modified for lactating dairy cattle (LDC). Secondly, compared with the observed true THI values alone, more relevant data on heat stress and its deleterious effects on dairy cattle performance, become available when mapping South Africa and Namibia according to the combined observed true and predicted THI values. Minimum precautions against heat stress in dairy cattle are recommended depending on THI values as classified by the LWSI for LDC. | en |
| dc.description.librarian | mn2014 | |
| dc.identifier.citation | Du Preez, JH, Giesecke, WH, Hattingh, PJ & Eisenberg, BE 1990, 'Heat stress in dairy cattle under southern African conditions. II. Identification of areas of potential heat stress during summer by means of observed true and predicted temperature-humidity index values’, Onderstepoort Journal of Veterinary Research, vol. 57, no. 3, pp. 183-187. | en |
| dc.identifier.issn | 0330-2465 | |
| dc.identifier.uri | http://hdl.handle.net/2263/41845 | |
| dc.language.iso | en | en |
| dc.publisher | Published by the Government Printer, Pretoria. | en |
| dc.rights | ©South Africa. Dept. of Agricultural Technical Services. ©University of Pretoria. Dept. of Library Services (digital). | en |
| dc.subject | Veterinary medicine | en |
| dc.subject.lcsh | Veterinary medicine -- South Africa | |
| dc.title | Heat stress in dairy cattle under southern African conditions. II. Identification of areas of potential heat stress during summer by means of observed true and predicted temperature-humidity index values | en |
| dc.type | Article | en |