土壤改良剂MDM对松嫩平原草甸碱土的改良效果

Effect of Soil Conditioner MDM on Improuing Meadow Alkali Soils in Songnen Plain

通过盆栽及田间小区试验,研究了改良剂MDM对松嫩平原草甸碱土的改良效果。结果表明,MDM可显著改善草甸碱土的理化性质。与对照相比,经MDM处理后的碱土钠碱化度(ESP)降低了46.2%,水溶性盐中CO32-含量降低了84.1%,Na++K+/Ca2++Mg2+降低了60%。此外玉米出苗率提高了12%,株高增加了14.4%,作物的干重和鲜重分别增加了52.69%和53.47%。

The effect of the soil conditioner MDM on ameliorating the meadow alkali soil was investigated by pot culture and field experiment. Results showed that MDM could obviously improve the physical and chemical properties of the alkali soil. Compared to that of CK, ESP of the alkali soil treated by MDM was decreased by 46.2%, the content of CO3^(2-) and the ratio Na^++K^+ /Ca^(2+)+Mg^(2+) in water soluble salt were decreased by 84.1% and 60% respectively. In addition, the soil pH value and electrical conductivity had decreased remarkably. The emergence rate of corn and the plant height was increased by 12% and 14.4% respectively. The fresh weight and dry weight of corn was increased by 52.69% and 53.47% respectively.