| Rational development and utilization of brackish water, is one method to solve the conflict between supply and demand, which has been a hot research topic and forward subject. Rational utilization of brackish water and rasing water resource utility efficiency has great meaning to ensure the sustainable development of water resources.The Northern Shandong Provience locates in the areas flooded by the Yellow River, which is the main crop production base of Shandong Provience and the main growing regions of winter wheat and summer corn. As the development of ecnomic, the fresh water resources in Northern Shandong Provience become inadequate, the conflict between supply and demand of water resources become aggravative.The Shallow underground water is abundance and making full use of these water is one method to solve the conflict between supply and demand of water resources. The tests of this research on brackish water irrigation for wheat and corn in Northern Shandong Provience, combined the research and application on brackish water safe irrigation by home and abroad, discussed the grow and decline pattern of soil salt of brackish water irrigation in straw returning and the influence on crop production, the threshold value of salt and water cotent under the long time irrigation with brackish water for wheat and corn.Bulid the technology models and application technical regulations on brackish water irrigation for corp in Northern Shandong Provience. The practice indicates that brackish water irrigation is safe for crop in suited time and conditon as well as under some measures. Compare with dry cultivation, the brackish water irrigation can rasie corp production.The technique of brackish water supplementary irrigation for corp in the Northern Shandong Provience has referenceable value to guide local irrigation and take more use of brackish water, and provide technology supporting system for sustainable development of agriculture. |
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