Effect of inoculation with Penicillium expansum on the microbial community and maturity of compost
2011
Wang, Hong-yuan | Fan, Bing-quan | Hu, Qing-xiu | Yin, Zhong-wei
Compost prepared from wheat straw and cattle/chicken mature was inoculated with the lignocellulolytic fungus, Penicillium expansum. Compared to uninoculated compost, the inoculated compost exhibited a 150% higher germination index, more than 1.2gkg⁻¹-dw of changes in NH₄ ⁺-N concentrations, a ca. 12.0% higher humus content and a lignocellulose degradation that proceeded 57.5% faster. Culture-based determinations of microbial populations demonstrated that aerobic heterotrophic bacteria and fungi were about 1–2 orders of magnitude higher in inoculated than in uninoculated compost. The number of ammonifying, ammonium-oxidizing, nitrite-oxidizing, denitrifying bacteria and cellulose-decomposing bacteria was 6.1–9.0log₁₀CFUg⁻¹-dw, 1.2–4.3log₁₀MPNg⁻¹-dw, 3.5–6.8log₁₀MPNg⁻¹-dw, 3.58–4.34log₁₀MPNg⁻¹-dw, 1.4–3.8log₁₀MPNg⁻¹-dw, and 4.2–8.8log₁₀CFUg⁻¹-dw higher in the compost inoculated with P. expansum.
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