外源有机添加物对黄壤性质及黄壤吸附铬的影响

有机物料加入黄壤培养后,土壤pH值降低,土壤游离氧化铁和非晶质氧化铁含量升高,有机物料的添加量与活性铁的含量呈正相关.有机物料的加入增加了土壤中有机质的含量,增加的大小顺序为泥炭＞玉米秸秆＞牛粪＞葡萄糖/蛋白胨＞CK,添加4种有机物料培养后黄壤对铬吸附量的大小为葡萄糖/蛋白胨＞牛粪＞玉米秸秆＞泥炭,添加相同的有机物料培养后,黄壤对铬的吸附量随添加量的增加而下降.

Effecs of Exogenous Organic Additives on Yellow Soil Character and Chromium Adsorption

When the organic substances are added in the yellow soil,the pH reduces,the soil free ferric oxide and noncrystal ferric oxide content rises and there is a positive correlation between the additive amount and active iron content in the yellow soil.The added organic substances increases the organic matter content in the yellow soil and the increase order is peat>maize straw>cow dung>glucose peptone>CK.The chromium adsorption amount of the yellow soil with adding four organic substances is glucose peptone>cow dung>maize straw>peat,but the chromium adsorption amount of the yellow soil decreases with increase of the same organic substance.