为了研究不同类型土壤调理剂及不同施用量对土壤pH值、有效态Cd含量的影响,探讨土壤pH值与有效态Cd之间的关系,采用田间正交试验方法,选用4种土壤调理剂,并以150、100和50 kg/667m2施用量进行正交试验.试验结果表明,与空白对照相比,4种土壤调理剂可提高土壤pH值0.06~1.28个单位,以土壤调理剂1的150 kg/667m2施用量效果最佳;4种土壤调理剂均能降低土壤有效态Cd含量,且随着施用量的增加降低效果越好,4种土壤调理剂降低效果依次为:土壤调理剂1>土壤调理剂2>土壤调理剂3>土壤调理剂4;土壤pH值与有效态Cd之间呈显著负相关关系.%In order to study the effect of different soil conditioner and different application amount on soil pH and available Cd content, the relationship between soil pH and available Cd was discussed. In this paper, four kinds of soil conditioner were selected by field orthogonal test. And orthogonal test was conducted at 2250 kg/hm2, 1500 kg/hm2, 750 kg/hm2 application rate. The results showed that compared with the blank control, the four soil conditioner could improve the soil pH value by 0.06-1.28 units, and the soil conditioner 1 had the best effect of 2250 kg/hm2 application rate. The four soil conditioner could reduce soil available Cd content, and with the increase of the application rate, the decreasing effect become well. The decreasing effect is in sequence of soil conditioner 1> soil conditioner 2> soil conditioner 3> soil conditioner 4. In addition, there was a significant negative correlation between the soil pH value and the effective Cd.
展开▼
