不同施肥处理对设施土壤盐分的影响

The effect on salinity of facilities soil by different manure treatment

试验选择有16年龄的塑料大棚,对不同处理引起的土壤电导率、土壤硝酸根含量、土壤钙离子含量进行了分析;结果表明,设施土壤中NO3-、Ca2+含量与土壤的电导率呈现极显著正相关;腐植酸和沸石在降低土壤盐分含量方面效果都很显著;腐植酸在降低土壤电导率和土壤交换性钙含量方面优于沸石,沸石在降低土壤NO3--N含量方面优于腐植酸,腐植酸+沸石处理在降低土壤盐分的各个方面均效果最好;施肥可以快速增加土壤盐分的含量,过量施用肥料会引起土壤养分的快速富集,同时高度富集的养分元素成为土壤水溶性盐基离子总量提高的根本原因;设施栽培必须强调测土配方施肥。

The large shelf with 16 years has been chose for the test,we have analyzed the soil conductivity,NO3-and Ca2＋ content.The result shows that NO3-and Ca2＋ content in facilities soil was positive significantly to soil conductivity.During reducing soil conductivity and Ca2＋ content,humic acid was better than zeolite.And zeolite was better than humic acid during reducing NO3--N content.However,the mixture of humic acid and zeolite is the best.Manure can increase content of soil salinity quickly.But overdose can lead to fast enriching of soil nutrient and water-solubility Base ion improving.So facilities planting must emphasize on manure by soil nutrient and improve production.