大棚土壤盐渍化状况

目的]研究大棚土壤盐分动态变化,为合理利用大棚土壤提供理论依据。方法]选取不同种植年限蔬菜大棚,测定了土壤pH值、盐分总量及主要盐分含量。结果]大棚菜地土壤pH值低于露天菜地和一般农田土壤,随种植年限的延长土壤逐渐酸化。大棚菜地土壤盐分含量比相邻农田、露天菜地分别增加324.12%和253.33%,大棚菜地土壤Cl-与NO3-含量比相邻农田和露天菜地分别增加22.85%和109.56%,226.67%和318.76%。结论]随着大棚蔬菜种植年限的延长,土壤盐分含量增加,尤以Cl-、NO3-含量增加最多,土壤发生盐渍化。

Study on Salinization in Green-house Soil

Objective]In order to provide the theoretical basis for reasonable utilization of green-house soil,the dynamic change of soil salt was analyzed.Method]Soil pH value,salt gross and content of salt ion of cropping vegetable greenhouse at different duration were measured.Result]pH value of vegetable greenhouse soil was lower than that of air-opening vegetable and cereal crop soil.Besides,soil of the former became gradually acidification with the prolongation of cropping duration.Secondly,the salt content of...