The content of soil AK increased obviously in the south of Yixing and the northwest of Wuxi, and decreased in mid-north of Yixing, Taicang and Zhangjiagang.

• 土壤速效钾含量在宜兴市南部和无锡市区西北部增加最明显，宜兴市中北部、太仓市和张家港市则有明显下降。