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内蒙古西部河套、东部西辽河两大灌区,属内陆盐碱土区。分布有较大面积的苏打盐土、碱化土和碱土,一般呈斑状分布,很难抓住苗,严重影响农牧林业的发展。随着我国磷肥工业的发展,大量付产品磷石膏也相应产生,其所含的磷酸钙等,为改良碱土、碱化土提供了物质条件。过去曾零星做过石膏改土效果试验,为进一步明确磷石膏改土增产效果,近两年我们继续做了一系列试验,为大面积推广施用提供了科学依据。
Inner Mongolia western Loop, the East West Liaohe two irrigation areas, is a saline land area. Distribution of a larger area of soda salt, alkalized soil and alkaline earth, generally showed a patchy distribution, it is difficult to seize the seedlings, seriously affecting the development of agriculture, animal husbandry and forestry. With the development of China’s phosphate fertilizer industry, a large number of products to pay for the production of phosphogypsum, which contains calcium phosphate, etc., to improve the alkaline earth, alkalized soil provides the material conditions. In the past have done sporadic gypsum soil test, in order to further clarify the effect of phosphorus gypsum soil improvement, the past two years we continue to do a series of experiments for large-scale popularization and application provides a scientific basis.