Enhanced animal production systems to satisfy demand for high value animal protein are needed.The driving force behind the demand for livestock products is a combination of population growth (1.5 percent per year),rising incomes (capita GDP has grown over 3 percent per year) ...Thesis (Ph. D. in Agriculture)--University of Tsukuba, (B), no. 1607, 2000.3.24Includes bibliographical references (p. 88-97)Titlepage,Contents -- Chapter.1 Introduction -- Chapter.2 Materials and Methods -- Chapter.3 Development of methods for this study -- Chapter.4 Selection of killer yeasts(Kluyveromyces lactis) to prevent aerobic spoilage of silage -- Chapter.5 lsolation of Kluyveromyces lactis killer strain defective in growth on lactic acid -- Chapter.6 Prevention of aerobic spoilage of maize silage by a genetically modified killer yeast,defective in ability to grow on lactic acid -- Chapter.7 Safety aspect of using a genetically modified strain as a silage additive -- Chapter.8 General Discussion -- Acknowledgments,References,Paper list
