Abstract
After agriculture reform of 1978, the Chinese agriculture faced dramatic conversion. This change leaded increasing of food production under maintaining high productivity. Yellow River basin, which is an eminent grain production area in China, needed to hurry to produce more grain in order to support increased population and economic development of China. However, existing studies that grasped the reality of long-term grain production in regional levels of this Yellow River basin has been not yet completed. Therefore, by this study, we classify Yellow River basin by a local characteristic and analyze change of grain productivity and its factors. Firstly, we collected available data by prefecture and city levels and classified it in five basins, upstream basin, midstream basin, downstream basin, Fen river basin and Wei river basin. Secondary, year of 1980, 1991, 1997 and 2000 were set as study object periods. Thirdly, we showed a chronological change of five different basins of grain productivity and its factors. Finally, multiple regression analysis was performed to show influence of the factors to grain productivity. As a result, influences of the factors to grain productivity were totally different in 5 basins and year changes.
