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以黄土高原旱塬区黑垆土和黄绵土为材料,研究了不同土壤对硝态氮肥、铵态氮肥、酰胺态氮肥的吸持情况。结果表明黑垆土对NO-3-N、NH+4-N和CO(NH2)2的吸持力分别为:4.835mgN/100g、4.960mgN/100g、4.980mgN/100g;黄绵土对NO-3-N、NH+4-N和CO(NH2)2的吸持力分别为:4.803mgN/100g、4.947mgN/100g、4.975mgN/100g,且黑垆土对氮肥的吸持力总体高于黄绵土对氮肥的吸持力。对于同一种土壤来说,氮肥的吸附力大小为:CO(NH2)2>NH+4-N>NO-3-N.
The black soil and loessial soil in dryland of Loess Plateau were used as materials to study the adsorption of nitrate nitrogen, ammonium nitrogen and amylose nitrogen in different soils. The results showed that the retention of NO-3-N, NH + 4-N and CO (NH 2) 2 in black mulch were as follows: 4.835mgN / 100g, 4.960mgN / 100g and 4.980mgN / The adsorption capacities of nitrogen, NH + 4-N and CO (NH2) 2 were 4.803mgN / 100g, 4.947mgN / 100g and 4.975mgN / 100g, respectively. Absorption of nitrogen fertilizer. For the same soil, the adsorption capacity of nitrogen fertilizer is CO (NH2) 2> NH + 4-N> NO-3-N.