| Effect of new process of aerobic fermentation of cow manure and straw waste on composting |
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| DOI：10.7606/j.issn.1000-7601.2020.06.11 |
| Key Words: cow manure straw waste aerobic fermentation compost effect |
| Author Name | Affiliation | | ZHOU Xirong | Agriculture College of Ningxia University, Yinchuan, Ningxia 750021, China | | ZHANG Liping | Agriculture College of Ningxia University, Yinchuan, Ningxia 750021, China | | JIANG Peng | Agriculture College of Ningxia University, Yinchuan, Ningxia 750021, China | | SUN Quan | Agriculture College of Ningxia University, Yinchuan, Ningxia 750021, China | | WANG Rui | Agriculture College of Ningxia University, Yinchuan, Ningxia 750021, China | | LIU Shaoquan | Agriculture College of Ningxia University, Yinchuan, Ningxia 750021, China | | LIU Zhi | Agriculture College of Ningxia University, Yinchuan, Ningxia 750021, China |
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| Abstract: |
| Using cow dung as the main material, corn stalks, wolfberry branches, and grape branches as auxiliary materials for carbon and nitrogen ratios, adding microbial inoculants, aerobic fermentation of organic materials through a self\|made fully enclosed rotary ventilation oxygenation device, we compared different organic auxiliary materials with the effect of the new technology of cow manure mixture rot fermentation on compost rot effect. A total of three treatments were setup in the experiment: T1 (cow dung + corn stalk), T2 (cow dung + medlar branch), T3 (cow dung + grape branch), and physical, chemical, and biological indicators were measured as the assessment criteria for each index evaluation. The results showed that after using plant straw instead of weathered coal and furfural residue for aerobic rot fermentation, the organic content of T1, T2, and T3 treatment was 45.47%~47.80%, and the temperature was maintained above 60℃ for more than 14 days. Water content was 28.21%~30.75%, pH value was between 8.29 to 8.49, fecal coliforms were less than 3.60 MPN·g-1, roundworm mortality 97.04%~98.34%, heavy metal Cd, Cr, As, and Pb contents were 0.809~0.842, 5.34~17.37, 4.26~4.72 mg·kg-1, and 1.64~2.15 mg·kg-1, respectively, within the standards; The N+P2O5+K2O was close to NY525-2012 of Organic Fertilizer Standard at 3.94%~4.70%; cellulose, hemicellulose, and lignin degraded significantly. After the rot was completed, the advantages among T1, T2, and T3 treatment indicators were obvious. T1 treatment required the shortest fermentation time, which was 21 days while T2 and T3 treatments were both completed after 25 days. Corn straw had the best ratio, followed by grape branches, and wolfberry branches had the slowest fermentation ratio. Considering comprehensively the aerobic rot fermentation process, physical and chemical index properties and biological index changes and fermentation cost, it is recommended to use the ratio of corn stalk and cow dung fermentation in actual production, which can effectively promote the decomposing process, improve product quality, and save costs. |
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