DETERMINANTS OF THE MARKETED-PIG PER SOW PER YEAR FOR DECISION-MAKING OF PIGGERY ENTREPRENEUR IN SOUTH KOREA.

This study was done to induce efficiently environmental management of piggery via an empirical analysis how much a variety of environmental factors give influence on marketed pig per sow per year (MSY) in production of pig. 30 Pig farms were surveyed for analyses of pig rearing environmental factors, productivity index, and income index. The collected data were examined for influenceon MSY owing to these factors via a multipleregression model.According to results of model estimation, if mortality rate of pigs increased 1%, MSY reduced 0.18 heads, whereasif a number of sows increased 1 head, MSY reduced rather 0.007 heads. When the marketing day and estrus interval delayed and increased 1 day,MSY reduced 0.095 and 0.534 heads, respectively.Therefore, in order to improve MSY, entrepreneur to manage a piggery is a critically important to reduce mortality rate via decrease of harmful gas in piggery.