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作 者:周素静[1] 郭文秀[1] 廖淑华[1] 刘冬华[1] 乔铁[1]
出 处:《郑州铁路职业技术学院学报》2016年第3期22-25,共4页Journal of Zhengzhou Railway Vocational and Technical College
基 金:河南省软科学研究计划项目(142400410939)
摘 要:根据规模化养殖场生产技术规范和生猪养殖经验,对模型参数作出合理假设,并通过行业网站收集一定时期内的生猪价格、饲料价格等数据,计算出生猪的平均价格、养殖成本等建模所需数据。建立当达到或超过盈亏平衡点时每头母猪每年平均产仔量所满足的不等式模型,求得当每头母猪的年平均产仔量达到6头时,该养殖场的效益达到或超过盈亏平衡点;建立母猪、公猪和猪仔存栏数的差分方程模型,利用Matlab求得当该养殖场养殖规模达到饱和时,小猪选为种猪的比例为0.015 9,母猪的存栏数为871头,公猪的存栏数为29头,猪仔的存栏数为9100头。According to the technical specifications and farming experience of large- scale pig farms,the author set up a hypothesis on the model parameters and calculated average hog price and feeding cost with the raw data from farming industry website; then,built an inequality model and got the result that the profit of pig farms was at or above break- even point when the average number of piglets of a sow was six per year. At last,the author constructed a difference equation model and got a result by using Matlab,that when the farm scale was saturated,871 sows stock,29 boars stock,9100 piglets stock and the proportion of piglets being elected boar was 0. 0159.
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