| 土壤湿度水平和湿—干循环对硝酸钙盐积累土壤锰锰释放的影响 |
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| 引用本文： | 司友斌,马友华,章力干.土壤湿度水平和湿—干循环对硝酸钙盐积累土壤锰锰释放的影响[J].应用生态学报,2001,12(2):233-236. |
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| 作者姓名： | 司友斌 马友华 章力干 |
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| 作者单位： | 安徽农业大学, |
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| 基金项目： | 安徽省教委自然科学基金资助项目(97JL0067). |
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| 摘 要： | 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a(NO3)2盐能增加Mn的不溶性，这在Mn含量低的土训上，最终将导致Mn的缺乏。
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| 关 键 词： | 锰有效性 硝酸盐 土壤水分 湿－干循环 土壤锰释放 土壤湿度 |
| 文章编号： | 1001-9332(2001)02-0233-04 |
| 修稿时间： | 1999年12月27 |
Effect of soil moisture and wetting-drying on Mn release in Ca(NO_3)_2-amended soils. |
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| SI Youbin,Ma Youhua,ZHANG Ligan.Effect of soil moisture and wetting-drying on Mn release in Ca(NO_3)_2-amended soils.[J].Chinese Journal of Applied Ecology,2001,12(2):233-236. |
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| Authors: | SI Youbin Ma Youhua ZHANG Ligan |
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| Institution: | Anhui Agricultural University, Hefei 230036. youbinsi@21cn.com |
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| Abstract: | 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. |
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| Keywords: | Mn availability Calcium-nitrate Soil moisture Wetting-drying cycles |
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