南方红黄壤地区是我国重要的粮,棉、油生产基地,该地区土地面积218万平方公里,占国土总面积的22.7%,但目前土壤的退化十分严重,且土壤普遍偏酸,这些现象已经严重影响到该地区农业和农村经济的持续发展。酸化是红壤地区土壤中极为普遍的现象,也是红壤退化的一种明显的表现形式,但 The areas of red and yellow soil in the south are the important production bases of grain, cotton and oil in our country. The area of ​​land in this area is 2.18 million km 2, accounting for 22.7% of the total land area. However, the degradation of soil is very serious and the soil is generally sour. Seriously affected the sustainable development of agriculture and rural economy in the area. Acidification is a very common phenomenon in soils of red soils and is also an obvious manifestation of the degradation of red soils