When clay content was 1.5%~2%,add 15%~20% zeoplite or 5%~15% peat to achieve proper permeability.

• 3)在粘粒含量为1.；5%25~2%25时；混合15%25~20%25的沸石或混合5%25~15%25的泥炭；也能够达到较好的调节效果。