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This article is from the perspective of historical geography to explore the salinization of the soil of the Republic of China in the Ming and Qing Dynasties in Guanzhong area distribution and improved. Specific measures of the Ming and Qing, the Republic of Guanzhong Area in the salinization of soil distribution Reorganizing, analyze the spatial and temporal characteristics of the distribution and causes, on this basis, summarizes the improvement of the Republic of China in the Ming and Qing Dynasties, the use of soil salinization. The text is divided into two parts, the first part is the introduction, the body of the second part, three chapters. The basic conclusions of the article are as follows. First of all, in the Review of the relevant previous generation salinization of soil distribution based on, in chronological order, warp, weft space sequence discusses the distribution of soil salinization major regions of the Republic of China of the Ming and Qing Dynasties. Through combing the literature found that the main areas of salinization of soil distribution in this period is basically the same, and we now know the distribution, mainly distributed in the eastern Guanzhong region; including Jinghuiqu Irrigation; Canal Irrigation, Luohui, the Pucheng Fuping clamp slot as well as two Chinese regions; Lower Weihe River and coastal beaches. Secondly, the text in accordance with this standard salt production will salinization of soil divided into two categories: one is the general area of ??salinization, and the other is a serious regional salinization. Ancient salt production Pucheng, Fuping, chaoyi, Dali salinization degree than elsewhere in the Guanzhong area serious. Distribution of saline-alkali soil both time characteristics, its spatial characteristics. Jing River Basin the Jingyang, Mihara, gaoling, Lintong region located soil salinization exists before the Han Dynasty, there still exists the Republic of China to the Qing; the Changan, Huxian, Hing equality in the Weihe River Basin coast, due to the Weihe swing , located in many of saline land, in rivers and beaches caused a greater impact on the people's production and life. The Dali, chaoyi located along the Yellow River, Fei Ji, containing salinization of the soil of the changes of the Yellow River counties far-reaching. Two Chinese clip groove and Tongguan in the backwater area of ??the Yellow River, the Yellow River overflows, migration have an impact on both sides of the soil change. Both man-made causes of this period Guanzhong area salinization of soil formation, natural causes. The artificial main reasons means unreasonable irrigation, natural causes dry soil, geological structure, climate and environmental degradation. Salinization of soil formation, in addition to climate-related drought, rivers change also makes the Beaches are located along the river with alkaline, resulting in soil salinization of the Republic of the distribution of this period with traditional compared to the period of the Ming and Qing dynasties, a broader range. I believe that: the county distribution caused by the Guanzhong area salinization soil, less than the Republican period mainly due to the lack of literature in the Ming and Qing dynasties, historical details today slightly Ancient caused. In addition, the Republic of China by the Western modern science and technology, as well as the Republic of China of the Ming and Qing Dynasties in Guanzhong area of ??salinized soil trends also affect a wider range of its scope than the traditional period. Finally, on the basis of a review next before the Guanzhong area salinized soil improvement, a detailed discussion of the Republican period of the Ming and Qing Dynasties salinization of soil improvement. By comparative analysis of the Ming, Ming and Qing dynasties, the Republic of China salinization of soil improvement, historical period improved soil salinization measures water conservancy, silt Tian grow rice planting salinity crop, but by the Republic of China Western science and technology have the technical means of transformation and innovation. This period, there have been the chemically modified Lee comprehensive management of a variety of measures the combination of improved new methods of soil salinization, new ideas, new initiatives.
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