沼渣用作林业育苗基质的特性

Characteristics of Biogas Residues Used in Forestry Nursery Matrix

为探讨渣应用于林业育苗的可行性,对沼渣的物理性能分析并与林业常用的椰糠、木屑和黄心土育苗基质进行对比,对不同沼气工程粪污经过厌氧发酵后污染物去除效果、沼渣养分及重金属含量变化情况,进行采样分析氮、磷、钾、有机质、腐殖酸以及重金属含量等指标。结果表明,沼渣EC值在植物生长范围内,沼渣作为育苗基质有较好物理特性,沼渣中各营养成分含量有利于苗木生长,不同沼气工程的沼渣中氮、磷、钾和重金属含量表现出较大差异。

In order to investigate the feasibility of biogas residues used in the forestry nursery, the physical properties of biogas residues were analyzed and compared with nursery substrates based on coconut husk, sawdust, and the yellow soil, which usually used for forestry nursery matrix. Nitrogen, phosphor- us, potassium, organic matter, humic acid and heavy metal content were also analyzed after anaerobic di- gestion of manure through different biogas projects. The results showed that the EC value of biogas residues was within the range for plant growth. Biogas residues as a nursery substrate had good physical prop- erties, and nutrient contents of biogas residues were conducive to the growth of seedlings. phosphorus, potassium and heavy metal content of different biogas projects were shown to have Nitrogen, a significant difference.