Paršavedžių išbrokavimo dėl skirtingų priežasčių ekonominis įvertinimas

• Main Author: Juraitis, Arvydas
• Other Authors: Kriauzienė, Janina
• Format: Dissertation
• Language: Lithuanian
• Published: Lithuanian Academic Libraries Network (LABT) 2007
• Subjects: Zootechny; Paršavedės; Economic evaluation; Ekonominis įvertinimas; Sows
• Online Access: http://vddb.library.lt/fedora/get/LT-eLABa-0001:E.02~2007~D_20070419_153221-97765/DS.005.0.02.ETD

Objective – To evaluate the correlation of sows removing genotype and farm conditions on the reproduction indicators. Research goals: 1. To analyse genotype and farm conditions influence to researching reproductions indicators of the sows; 2. To evaluate the influence of sows removing genotype and farm conditions on the reproduction indicators; 3. To evaluate removals reasons correlation with sows reproductions indicators. Research methods: The aim of the study was to evaluate how parameters of lifetime productivity differ for females having distinct removal reasons and was to describe the reasons for removal of sows distributed across parity categories data analysis was done with Microsoft Excel 2000 program. We have calculated research attribute medium values and bias (SE). Using general linear model we have investigated (genotype, farm and condeming reasons) fact influens for research reproduction index. Reproduction problems and diseases represented two third of all removals. Too early sows removing is one of the determinative factor which decreasing pigs drove reproduction and farm profitability.