| 土壤中硒的形态 |
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| 中文关键词 硒 土壤 形态 |
| 英文关键词 selenium(Se) soil species |
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| 中文摘要 |
| 3种江苏省土壤,即潮盐土、灰潮土和黄棕壤原土硒和外加硒的形态分布研究结果表明,原土硒主要分布在残渣态F5上,3种土壤的F5的百分含量均达全量硒的80%左右,而外加硒经4个月培养后相对均匀地分布于可溶态F1黄棕壤例外),交换态F2、氨水提取态F3和残渣态F5上、2种处理下硒形态分布与土壤pH值、粘粒和游离氧化铁含量有一定关系。pH值是潮盐土≈灰潮土>黄宗壤,粘粘及游离氧化铁含量是黄棕壤>潮盐土>灰潮土,F1、F2的百分含量是潮盐土、灰期土>黄棕壤,而F3、F5的百分含量是黄棕壤>潮盐土>灰潮土。 |
| 英文摘要 |
| The distribution of natural and applied selenium (Se) species in three kinds of soil,i.e.,tide-saline soil(C),gray tide-soil(G)and yellow brown soil(Y),in Jiangsu province was studied. The results show that the naturally occurred Se species were mainly distributed as residual species (F5),and F5 in each of the three kinds of soil accounted for about 80% of total Se species. After an incubation for 4 months, the applied Se species were relatively homogeneous to be distributed as soluble species (F1)(except in Y),exchangeable species(F2),aqueous ammonia extractable species(F3)and residual species(F5).With two different treatments,the distribution of Se species was found to be in some relation to soil pH value, glutinous grains and free iron oxide levels.The soil pH value was in such an order as C=G>Y;the levels of glutinous grain and free iron oxides:Y>C>G;the percentage levels of F1 and F2:C=G>Y;and the percentage levels of F3 and F5:Y>C>G. |
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