Carclazyte soil improvement method

The invention discloses a whitish soil improvement method. The method includes the steps that (1) rice straw returning or wheat straw returning is conducted on carclazyte soil; (2) after straw returning is conducted, organic fertilizer is applied in a combined mode, and nitrogenous fertilizer is added to adjust the C/N ratio of straw to range from 20:1 to 30:1; (3) deep tillage is conducted on the soil to enable silt on the surface of the soil and heavy loess at the bottom to be blended fully; (4) after deep tillage is conducted on the soil, irrigation field retting is conducted; (5) after deep tillage and field retting are conducted on the soil, rice base fertilizer is applied; (6) the steps are repeated many times, and the depth of deep tillage is increased year by year every time deep tillage is conducted. According to the method, the rice per unit yield and soil fertility are improved, the soil structure is improved, the cation exchange capacity of the soil is improved, and the community structure of soil microorganisms and the soil enzyme activity are affected.