大剂量磷肥对锰、铜、铁素营养的影响

Effect of Large Dosage of Phosphate Fertilizer on Mn,Cu and Fe Nutrition

用甘肃主要农业土壤进行盆栽试验，研究施磷对锰、铜、铁素营养的影响。结果表明：（１）施磷显著增加松结有机态锰、紧结有机态锰和松结有机态铁的含量；而降低碳酸盐结合态锰、铜和铁的含量。（２）施锰、铜显著增加松结有机态铜和碳酸盐结合态铜。（３）施磷降低了玉米幼苗的含铜量和含铁量。

The effect of large dosage of phosphate fertilizer on Mn,Cu and Fe nutrition on prin-Ciple agricultural soils in Gansu were studied by pot experiment.The results were as followe:(1)theapplication of p could increase significantly the content of loose bound to organic matter form Mn,fixed bound to organic matter form Mn and loose bound to organic matter form Fe, but decrease the content of carbonate bound form Mn, Cu and Fe;(2)the application of Mn and Cu could increase sig nificantly the content of loose bound to organic matter form Cu and carbonate bound form Cu;(3)the application of P could decrease the content of Cu and corn seedling.