Saline soil is an extremely difficult and modified soil, widely distributed around the world. According to UN-UNESCO and FAO, the world's saline soil area is about 9.54x 10~8hm~2, and there is a growing trend, every year in 1.0xl0~6-1.5x 10~6hm~2 speed growth, the effective utilization of land resources to the world is the most serious threat. The total area of saline-alkali land in China is about 9.91 x 10~7hm~2, including the Songnen Plain, which is called one of the three major saline soil concentrations in the world. The Songnen plain is an important grain producing area in China, and the saline soil occupies most of the Songnen plain, so it is of great significance to study the saline soil and improvement in Songnen plain.
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机译：盐渍土是一种极其困难和修饰的土壤，广泛分布在世界各地。据联合国教科文组织和粮农组织，世界盐水土壤约为9.54倍10〜8小时〜2，趋势不断增长，每年都在1.0xl0〜6-1.5x 10〜6hm〜2速度增长，有效利用土地资源对世界是最严重的威胁。中国的盐碱土地的总面积约为9.91 x 10〜7hm〜2，包括宋嫩平原，该普通普通称为世界三种主要盐水土壤浓度之一。宋嫩平原是中国重要的粮食生产区，盐水土壤占据了宋嫩平原的大部分，因此研究盐水土壤和宋仁平原的改善是具有重要意义。
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