Ameliorating saline alkaline land by intensive pumping and irrigation and maintaining ecological stability

"Well irrigation and well drainage" was adopted to ameliorate saline-alkaline land in the 1960's in Feng Qiu and Yucheng, and "pumping saline-water and suppling fresh water" was used to improve saline-alkaline land in the 1960's in the northern part of China. On the bases of the specific conditions in Bei Qiu in Yucheng City, we adopted a method of intensive pumping and irrigation to ameliorate saline-alkaline land. The improvement is distinct, and the treatment period is shorter. After intensive pumping and irrigation, the ecological conditions can be long maintained by spreading manure, intertilling and loosening the soil, covering with crops at all seasons, salt content in the cultivated layer is less than 0.2%, and crops grow very well for 4 years. It is clear that irrigation can leach salt of soil, spreading manure and intertilling-loosenning the soil can improve root condition. Pumping saline water and Levelling of land can strengthen the improving effect.