[Effect of soil moisture and wetting-drying on Mn release in Ca(NO3)2-amended soils].
A study on the effects of two moisture levels (200 and 400 g.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 transformed into soluble and exchangeable Mn, when soil water content was high. Salt had a definite effect on the transformation of easily reducible Mn. NO3- could decrease soil redox potential, and inhibit the transformation of easily reducible Mn. Wetting-drying significantly(alpha < 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.
Si
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Y
Anhui Agricultural University, Hefei 230036. youbinsi@21cn.com
Ma
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Y
Zhang
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L
D017610:Calcium Compounds / Q000494:pharmacology*; D008345:Manganese / Q000378:metabolism*; D009566:Nitrates / Q000494:pharmacology*; D012987:Soil / Q000032:analysis*; D014867:Water / Q000032:analysis*
D017610:Calcium Compounds; D009566:Nitrates; D012987:Soil; D014867:Water; D008345:Manganese; C059948:calcium nitrate