| Summary: | 碩士 === 國立中興大學 === 畜產學系 === 89 === The purpose of this study was to develop the software for supporting cow's culling decision. Using cow's reproductive efficiency, production records and raw milk quality, the rank of productive performance of individuals in the herd was therefore induced. Cow's health management information was also referred to provide for decision-makers to evaluate whether to cull their cows or not. This system was written in Visual FoxPro 6.0 programming language. The inputs available include individual cow's basic information, reproductive record, mating record, health management, production record, and body condition scores. Through the calculation of the program, the working reports of heat observation, conception check, drying, and calving were produced. The warning messages including long open-day cow, heifer never mating, services too much, reproductive disturbance, disease, low fertility, and poor milk quality could also be displayed. The program also had the function of reports of herd's parity distribution, mating times at different parity, reasons of re-mating, average reproductive performance of the farm, disease incidence rate, and statistic report of culling reasons. The default values of the system could be edited to meet individual farmers' requirement. Using the reports of working and statistics, managers could easily handle the situation of dairy farms and dairy performance, and make culling decision to improve their herd productivity.
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