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为了客观评价种养结合家庭农场模式中猪粪浆还田利用的环境安全性,本文就家庭农场猪粪污储存池粪浆中营养成分和铜、锌、砷含量,以及其还田后的土壤肥力、土壤中微量元素含量进行了分析。结果表明,家庭农场猪粪浆中铜、锌、砷含量分别为2.63、3.75、0mg/L,同时含有222.34mg/L碱解氮、20.44mg/L有效磷、711.11mg/L速效钾;腐熟后作为基肥还田,土壤中碱解氮、有效磷和速效钾的含量,以及铜、锌、砷含量与施用化肥的农田无显著性差异。结果表明,上海市松江区种养结合家庭农场猪粪浆还田利用可保持土壤肥力,未导致土壤铜、锌、砷含量的明显富集。
In order to objectively evaluate the environmental safety of pig manure utilization in combination with family farms, this paper analyzed the nutrient contents and contents of copper, zinc and arsenic in pig manure storage ponds of family farms, Fertility, soil trace elements were analyzed. The results showed that the content of copper, zinc and arsenic in pig manure of family farms were 2.63, 3.75 and 0 mg / L, respectively, and 222.34 mg / L, 20.44 mg / L available phosphorus and 711.11 mg / L available potassium; Afterwards, the contents of available nitrogen, available phosphorus and available potassium in the soil, as well as the content of copper, zinc and arsenic in the soil were not significantly different from those in the application of chemical fertilizers. The results showed that the soil fertility could be maintained by using pig manure in Songjiang District of Shanghai in combination with family farms, which did not lead to significant enrichment of Cu, Zn and As in soil.