中文摘要：

以靖远（A）、瓜州（B）、金昌（C）和新疆（D）4个区域盐渍化土壤为对象,采用水平土柱入渗法,探讨磷石膏盐碱土改良剂不同用量（0、6 000、12 000 kg·hm^-2）对湿润峰移动平均速率和土壤水分扩散率的影响。结果表明：不同用量磷石膏盐碱土改良剂对4种盐渍化土壤水分扩散率影响不同。对于A、B、D 3个区域盐渍化土壤,改良剂用量为6 000 kg·hm^-2以下时,对土壤水分传输潜在能力有促进作用;当改良剂用量超过6 000 kg·hm^-2时,改良剂对土壤水分传输潜在能力有抑制作用。而对于C区域盐渍化土壤,随着改良剂用量的增加,对水分传输潜在能力有明显的促进作用,这说明改良剂对C区域盐渍化土壤作用效果明显。

英文摘要：

The object of the study was the salinized soils in four areas（ Jinchang,Jingyuan,Guazhou and Xinjiang）,the effect of different applied amounts of phosphate gypsum agent（ 0,6 000,12 000 kg·hm- 2） on soil moisture diffusivity was studied by the method of infiltration of horizontal soil column. The result showed that the effect of different applied amounts of ameliorant on soil moisture diffusivity in 4 areas was different. When the applied amount was below 6 000 kg · hm- 2,the phosphate gypsum agent accelerated the velocity of soil moisture movement; but when the applied amount was excessed 6 000 kg·hm- 2,the phosphate gypsum agent suppressed the velocity of soil moisture movement in the sample A,B and D. The velocity of soil moisture movement was obviously increased with the increase of applied amounts of ameliorant for the sample C,which revealed that the effect of ameliorant for the sample C was much better than that for the sample A,B and D.