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对湖北省的主要旱地土壤种植多茬作物后油菜生产锰毒的原因进行了研究。结果表明，供试土壤pH值较原土样下降了1．0个单位。除石灰性土壤外，其它中酸性土壤交换性锰明显增加，造成油菜对锰吸收过量，同时由于吸收过程中锰铁拮抗作用的存在,植株在土壤锰毒发生后吸收的铁量下降，使体内锰铁比上升。
The reasons for the production of manganese toxicity in rapeseed after planting multiple stubble crops in the main dry land of Hubei Province were studied. The results showed that the soil pH value of the tested soil decreased by 1.0 unit compared with the original soil sample. Except for calcareous soil, the exchangeable manganese in other soils increased obviously, which resulted in excessive absorption of Mn in rapeseed. At the same time, due to the antagonism of ferromanganese in the process of absorption, the amount of iron absorbed by plants decreased after phytotoxicity, Ferromanganese ratio increased.