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本文通过在下蜀黄土中添加不同量的猪粪,研究在以淹水为主、干湿交替条件下,猪粪对土壤理化性质的影响。经培育427天后,测定了土壤有机质、全氮、水解氮、速效磷、钾、CEC、土壤对NH_4~+和磷的吸附及土壤物理性质的变化,并用主组元分析评价了施用猪粪对这些性质的综合影响。结果表明,在施用量为1%时,由于氧化铁的活化,使土壤结构破坏,猪粪对土壤理化性质的综合影响较差;但施用量在3%以上,土壤的各性质均得到改善,综合影响较好。
In this paper, by adding different amounts of pig manure to Xiashu loess, the effects of pig manure on the physical and chemical properties of the soil were studied under the condition of mainly flooding and alternating wet and dry conditions. After incubation for 427 days, the adsorption of soil organic matter, total nitrogen, hydrolyzed nitrogen, available phosphorus, potassium, CEC, soil on the NH 4 + and phosphorus and soil physical properties were measured and analyzed by principal component analysis The combined effect of these properties. The results showed that when the application rate was 1%, the soil structure was destroyed due to the activation of iron oxide, and pig manure had a poorer effect on the physical and chemical properties of the soil. However, when the application rate was above 3%, the soil properties were all improved, The comprehensive effect is better.