天然沸石对磷在潮土中有效性的影响

Influences of the Natural Zeolite on Phosphate Availability in Alluvial Soil

为了寻求提高磷在土壤中有效性的途径,以恒温振荡试验研究了天然沸石对水溶性磷在潮土中吸附、解吸的影响。结果表明,磷在天然沸石中的吸附率是在潮土中的39.2%,而吸附磷的解吸率比后者增加了63.2%。在天然沸石用量为2.5g时,天然沸石显著增加了潮土中磷的吸附和解吸,且天然沸石先于磷肥施入潮土处理的磷吸附率低于磷肥先于天然沸石施入潮土的处理,磷解吸率呈相反的变化。天然沸石对提高潮土保磷供磷能力具有较强的应用潜力。

In this paper, batch method was conducted to study the effect of zeolite on phosphate availability in alluvial soil. It found that the phosphate adsorption rate in the natual zeolite was 39.2% of that in the alluvial soil. The phosphate desorption rate in the former increased 63.2% than that in the latter. When the natural zeolite application amount was 2.5 g, the natural zeolite significantly increased phosphate adsorption and desorption in alluvial soil. The phosphate adsorption rate in the treatment that the natural zeolite was added in alluvial soil prior to phosphate was lower than that in the treatment that phosphate applied to alluvial soil before the natural zeolite, while the phosphate desorption showed a contrary tendency. The natural zeolite had significant potential in phosphate preserving and supplying in alluvial soil.