| The two kind of amendments of 5% orchard soil and 5% cinder are added separately into composting to investigate their effect on the characteristics of nitrogen and carbon changing and compost quality.The experiment was carried out in the ratio of 6.5 to 1 between fresh pig manure and corn straw(PM+CS) in the aerated static pile automatic composting device.The results indicated that there was little effects in composting temperature when the two amendments were added.During the high temperature stage,they could decrease the contents of ammoniumN and reduce the contents of ammonia,the ammonia concentration was 1 494.81 mg/m3、 1 172.36 mg/m3 and 1 433.15 mg/m3(25℃ value)respectively in the treatment PM+CS、 PM+CS+OS and PM+CS+C in the high temperature stage.During the composting process.the contents of organic-N increased 47.4%、 56.8% and 74.6%;the total nitrogen increased 46.4%、 46.0%和45.3% respectively in the three treatments.The nitrite in company with water soluble organic nitrogen had leached in the temperature decreasing and stable stage.The content of the organic carbon decreased 30.7%、 29.5%和28.2% in the three treatment respectively during the composting.The feces coliform value was all bigger than 0.111,the pH among 69 and the C/N among 1013 in the end of composting in three treatments,and the three composts were stabled. |