Chapters 2 and 3 are the peer reviewed version of the following articles, respectively: Anzai H, Wang L, Oishi K, Irbis C, Li K, Kumagai H, Inamura T, Hirooka H. 2015. Estimation of nitrogen and phosphorus flows in livestock production in Dianchi Lake basin, China. Animal Science Journal. Amachika Y, Anzai H, Wang L, Oishi K, Irbis C, Li K, Kumagai H, Inamura T, Hirooka, H. 2015. Estimation of potassium and magnesium flows in animal production in Dianchi Lake basin, China. Animal Science Journal. , which have been published in final forms at http://dx.doi.org/10.1111/asj.12390 and http://dx.doi.org/10.1111/asj.12518, respectively These articles may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.Chapter 4 is the peer reviewed version of the following article: Anzai H, Oishi K, Li K, Irbis C, Hirooka H, Inamura T, Kumagai H. 2011. Dietary nitrate loads on cows in dairy farms near Lake Dian, Kunming city, Yunnan Province, China. Trace Nutrient Research 28, 54-57., which has been published in final form at http://www.jtnrs.com/sym28/P-07.pdf. / 京都大学 / 0048 / 新制・課程博士 / 博士(農学) / 甲第19768号 / 農博第2164号 / 新制||農||1040(附属図書館) / 学位論文||H28||N4984(農学部図書室) / 32804 / 京都大学大学院農学研究科応用生物科学専攻 / (主査)教授 廣岡 博之, 教授 松井 徹, 教授 稲村 達也 / 学位規則第4条第1項該当 / Doctor of Agricultural Science / Kyoto University / DFAM