CAJ | 학술논문

在[Ca(NO3)2]盐处理土壤中，研究了两种湿度水平(200、400g·kg-1)和湿-干循环对土壤Mn释放的影响．结果表明，土壤水分状况影响土壤Mn的有效性，湿度大时，易还原态Mn转化为水溶态、交换态Mn；盐分对易还原态Mn的转化有一定影响，NO3-能缓冲土壤Eh的下降，有抑制易还原态Mn转化的作用．连续的湿-干循环能使土壤2价Mn(水溶态Mn、交换态Mn)浓度降低，而Ca(NO3)2盐能增加Mn的不溶性．这在Mn含量低的土壤上，最终将导致Mn的缺乏．
재[Ca(NO3)2]염처리토양중，연구료량충습도수평(200、400g·kg-1)화습-간순배대토양Mn석방적영향．결과표명，토양수분상황영향토양Mn적유효성，습도대시，역환원태Mn전화위수용태、교환태Mn；염분대역환원태Mn적전화유일정영향，NO3-능완충토양Eh적하강，유억제역환원태Mn전화적작용．련속적습-간순배능사토양2개Mn(수용태Mn、교환태Mn)농도강저，이Ca(NO3)2염능증가Mn적불용성．저재Mn함량저적토양상，최종장도치Mn적결핍．
A study on the effects of two moisture levels (200 and 400g.kg-1) and wetting-drying on the solubility of Mn in Ca (NO3)2-amended soils showed that water regime was a factor affecting Mn availability. Easily reducible Mn was trans formed into soluble and exchangeable Mn, when soil water content was high. Salt had a definite effect on the transfor mation of easily reducible Mn. NO3- could decrease soil redox potential, and inhibit the transformation of easily re ducible Mn. Wetting-drying significantly(a＜ 0.05) decreased the content of soil water-soluble and exchangeable Mn, while Ca(NO3)2 increased the insolubility of Mn, which might eventually lead to the deficiency of soil Mn.