| Co-Investigator(Kenkyū-buntansha) |
SUZUKI Keisuke Shinshu University, Faculty of Science : Associate Professor, 理学部, 助教授 (60145662)
IWAMA Kazuto Hokkaido University, Faculty of Agriculture : Professor, 農学部, 教授 (70144219)
TAKAHASHI Hidenori Hokkaido University, Graduate School of Environmental Earth Science : Associate Professor, 大学院・地球環境科学研究科, 助教授 (20001472)
INAMURA Testuya Aichi Prefectural University, Faculty of Letters : Professor, 文学部, 教授 (00203208)
YAMAMOTO Norio Graduate University of Advanced Studies, School of Advanced Sciences : Professor, 先導科学研究科, 教授 (90111088)
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| Research Abstract |
During August 30th to October 22nd, 2000, Hongo, Inamura and Yamamoto went to the eastern region in the Tibet Autonomous Region, China in order to survey the present situation of nomadism of yak and sheep, and crop production of wheat and barley. In addition, Takahashi and Suzuki studied heat and water balance in wheat field, activities of leaf area and stomata, and electric conductivity and pH of rain and underground water, in order to clarify the relationship between crop response and low content of carbon dioxide and vapor.
Under an altitude of 3800m, wheat and barley were cultivated in most fields. Above this altitude, yak and sheep nomads were carried out in natural grasslands. The eastern Tibet has the completely different landscape compared with the central Tibet. There were conifer forests under wet and warm condition. In the Nyingtri district, apple and rice were cultivated. It seems that popular recognition such as nomadic Tibet must be changed.
Farmers harvested many individua
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l plants of weedy oat invaded into wheat or barley fields. Harvested plants were washed, cut off from roots, dried up, and stored as a over-winter feed stuffs. Weedy oat was not only a weed, but was considered to be a important green fodder.
Previously, farmers ate "zampa", toasted barley, as a principal food, so that barley was cultivated in many fields. Recently, wheat cultivation is increasing with an increase in population of Han tribe. In many fields near Lhasa, wheat was cultivated, but barley cultivation was common in local villages. The main reason of increasing wheat cultivation is considered to be due to high productivity of wheat with increasing utilization of nitrogenous fertilizers.
Near Lhasa, there was an increase in potato and corn cultivation, and tomato and eggplant cultivation in a green house. A rise of annual per capita disposable income of urban residents bring about a higher level of their consumer life. The difference of disposable income between urban and rural residents increases year by year. Less
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