盐分对土壤锰释放的影响

Effect of salt on soil manganese release

盐分能诱导土壤锰的释放 .Na+和Ca2 +的离子交换作用促进了土壤锰向水溶液中释放 ,提高了土壤锰的有效性 ;同时 ,盐分降低了土壤的 pH值 ,并使土壤氧化还原电位发生变化 ,引起土壤中锰形态间的转化 .NO- 3 离子对氧化还原电位影响显著 。

Upon soil treatment with salt, Mn was replaced by Na + and Ca + and then released to soil solution. Meanwhile, soil pH fell down and soil redox potential changed in the salt treated soil. The treatment also resulted in reforming of soil Mn compounds. Anion NO - 3 had also certain effects on soil redox potential. For instance, readily reducible Mn was increased remarkably in the nitrate treated soil.