暗管条件下施用MM改良剂对苏打草甸碱土化学性质的影响

Effects of MM Modifier with Subsurface Pipe on Chemical Properties of Soda Meadow Alkaline Soil

通过对吉林省大安市安广镇苏打草甸碱土进行田间试验,研究不同用量MM改良剂对表层土壤化学性质的影响。结果表明：种植水稻能明显降低土壤pH值和电导率;施用MM改良剂后土壤pH值下降0.4~0.8个单位;电导率比对照低0.2 ms/cm;土壤有机质、碱解氮和有效磷含量都随改良剂用量的增加而增加。

By conducting field experiments on soda meadow alkaline soil of Anguang town, Da＇an City in Jilin Province, the effect of different dosage of MM modifier on chemical properties of the surface soil was studied. The results showed that rice cultivation could decrease soil electrical conductivity and pH obviously. The soil pH decreased 0.4 - 0.8 after applying MM modifier. The soil electrical conductivity was 0.2ms/cm lower than CK. The contents of soil organic matter and available N and P increased with the MM modifier lev- els increasing.