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《Research of Agricultural Modernization》 2016-03
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Effect of organic materials with different proportions on composting process

LU Yao-xiong;CUI Xin-wei;LONG Shi-ping;FAN Hai-shan;PENG Fu-yuan;Institute of Agricultural and Biological Resources Utilization,Hunan Academy of Agricultural Sciences;  
To promote the re-utilization of the local agricultural organic solid waste resources we used cow dung,pig manure and chicken manure as the main composting materials,and set up different treatments to carry out a compost experiment with the same ratio of carbon to nitrogen and the addition of the EM bacteria liquid agent.We analyzed the temporal dynamics of temperature,p H,EC,total nitrogen,ammonium nitrogen,nitrate nitrogen and germination index during the composting process,and compared the nutrient contents of the treatments before and after composting.The results showed that the cow-chicken-rice husk treatment warmed the fastest with the composting temperature maintained at approximately 70 ℃ in the high-temperature phase,up to 22.8% of nitrogen lost after composting.The pig-mushroom residue-chicken treatment held composting temperature below 65 ℃ in the high-temperature phase,lost 3.47% of nitrogen,and resulted in a germination index of 52% on 20 d during composting.This treatment had its composting maturity faster than other treatments.With the different proportions of organic materials composted after 32 d,all treatments had their p H being in the range of 7.7 to 8.5 and met the basic requirements of organic fertilizer standards,of which p H is in the weak-alkaline category and the germination index is approximately 80%.Our findings showed that the agricultural organic solid wastes can be completely decomposed via composting after 32 d.While we need to coordinate the ratio of carbon to nitrogen in the different organic materials to ensure a reasonable threshold for adjusting ventilation,controlling composting temperature of pile bodies at 45-65 ℃.Such a desirable composting procedure can reduce nitrogen loss and improve composting maturity.
【Fund】: 国家科技支撑计划项目(2012BAD14B17)~~
【CateGory Index】: S141.4
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