【摘要】 本文通过Keggin离子制备了柱撑蒙脱石,并对其进行了酸化处理。盆栽试验研究表明,利用柱撑蒙脱石和酸化柱撑蒙脱石对磷酸二铵进行改性试验处理,生物量显著高于磷铵对照,氮素和磷素利用率显著提高。X射线衍射技术和红外光谱对改性磷铵进行结构研究表明,其晶体结构发生了较大的变化,这种变化减少了氮的损失和磷在土壤中的固定,从而提高磷铵氮磷的生物有效性。更多还原

【Abstract】 We prepared pillared montmorillonite (PM) by Keggin ions, and activated the PM by H2SO4. The new modified monoammonium phosphates by mixing with certain proportion PM and APM were developed. The result of pot cultivation showed that PM and APM modified monoammonium phosphate were better than normal monoammonium phosphate under the equal weight condition. Through the analysis of crystal structure of PM and APM modified monoammonium phosphate by XRD and IR, the great change of crystal structure was found. The change of crystal structure reduced the losing of nitrogen and the available phosphorus fixed in soil, and the bioavailability of phosphate increased greatly. That is the main reason to increase the production of biomass.更多还原