棕壤中各亚类有效锰含量高低顺序为：白浆化棕壤>潮棕壤>典型棕壤>棕壤性

The order of available manganese content in each subtype of brown soil is: white pulped brown soil>tidal brown soil>typical brown soil>brown soil. The subsoils in the Chao soil have small differences, and the subsoils in the Chao soil are high, with an average of 55.3 mg/kg and a variation of 5.75-156.5 mg/kg. The variation is large, and the available manganese content varies greatly between regions; salinized Chao soil The content is slightly lower, with an average of 49.3mg/kg and a variation of 29.8-75.2mg/kg. The variation is small, and the effective manganese content is relatively uniform. The effective manganese content of each subgroup of Chao soil: Chao soil>Saline Chao soil

The high and low order of the effective manganese content of each subclass in the brown soil is: white-pulpized brown soil, tidal brown soil, typical brown soil, brown soil. In the tide soil, the sub-category difference is small, the tide soil sub-type is high, the average is 55.3mg/kg, the variation is 5.75 to 156.5mg/kg, the variation is large, the effective manganese content varies greatly between regions; Effective manganese content of subtypes of tidal soil: tidal soil and salted tide soil

The order of available manganese content in brown soil was albic brown soil > tidal brown soil > typical brown soil > brown soil. In the fluvo aquic soil, the difference is small, the average is 55.3 mg / kg, the range is 5.75-156.5 mg / kg, the range is large, the difference of available manganese content among regions is large; the content of salinized fluvo aquic soil is slightly lower, the average is 49.3 mg / kg, the range is 29.8-75.2 mg / kg, the range is small, and the content of available manganese is more uniform. The content of available manganese in different types of fluvo aquic soil was: fluvo aquic soil > salinized fluvo aquic soil<br>