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廖宗文, 吴平霄, 毛小云
植物营养与肥料学报2000,6(3):287~292,-0001,():
-1年11月30日
在节酸磷肥的生产过程中,加入一定比例的添加剂,研制出3种新型改性磷肥。化学分析结果表明,改性磷肥有效磷中水溶性磷比例下降;盆栽试验结果显示,在等养分量条件下,3种改性磷肥肥效较过磷酸钙均有较大幅度的增加;运用X射线衍射分析及红外光谱对改性磷肥的结构进行了研究,发现其晶体结构发生了较大的变化,这种晶体结构的变化减少了改性磷肥中有效磷在土壤中的固定,从而大大提高了其生物有效性。
改性磷肥, 结构, 机理
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【期刊论文】Comparative Study on Characteristics of P Fixation by Mn, Fe and Al
廖宗文, LU QIMING and LIAO ZHONGWEN
Pedosphere 7(4):325~330, 1997,-0001,():
-1年11月30日
An experiment was conducted to examine the role of Mn in P fixation through comparing with Al and Fe. Hydroxides and oxides of Al, Fe and Mn were prepared in lab under opened and closed conditions to react with phosphate. The newly formed Mn hydroxide showed the strongest P-fixing ability, even several times higher than Fe hydroxide, but became the lowest rapidly due to ageing when exposed to air. Mn oxide showed the lowest P-fixing ability. Therefore, a sound consideration on P fixation should be based on both quantities and P-fixing abilities of the compounds of Fe, Al and Mn. The importance of Mn on P availability should receive more attention especially under oxidation-reduction dynamic conditions.
Al,, Fe,, Mn,, phosphate fixation
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