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Outline
To comparatively investigate the influences of direct current (DC) and alternating current (AC) on the composting maturity of pig manure, fresh pig manure and corn stalks were utilized as raw materials. Based on aerobic composting, 3V DC and 3V AC were respectively applied, with no electric field application serving as the control (CK). A 42-day composting experiment was carried out. The results demonstrated that the high-temperature periods (>50℃) of the CK, DC, and AC treatments lasted for 9, 9, and 8days respectively, and the maximum temperatures were 68.3, 69.3, and 76.5℃ respectively. At the conclusion of composting, the pH values of the CK, DC, and AC treatments were 7.71, 7.92, and 7.61 respectively, the EC values were 3.75, 3.11, and 3.82mS/cm respectively, and the C/N ratios were 11.40, 10.51, and 11.96 respectively. The physicochemical properties of the compost in each treatment conformed to the basic requirements for harmlessness. At the end of composting, the moisture contents of the CK, DC, and AC treatments were 55.35%, 54.70%, and 45.45% respectively, the seed germination indices (GI) were 76%, 99%, and 87% respectively, and the ratios of humic acid to fulvic acid (HA/FA) were 1.53, 2.03, and 1.62 respectively. In summary, DC reduced the composting maturity time by 18%, and the effect of DC in promoting the composting maturity of pig manure was superior to that of AC. AC increased the maximum temperature of the compost by approximately 8℃, but it significantly decreased the moisture content of the compost.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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