Long-stemmed straw as an additional nesting material in modified Schmid pens in a commercial breeding unit: effects on sow behavior, and on piglet mortality and growth

查看全文 作　　者：Damm BI; Pedersen LJ; Heiskanen T; 出　　处：《Appl Anita Behav Sci》索引2005年第92卷,共0页