Study on parameters of the maturity and spectrum characteristic of chicken manure composting

Aiming at full use of solid offal from agriculture,we designed a high temperature compost system choosing chicken manure and corn straw as raw materials and packing materials.The maturity parameters and index were studied using physical analytical method,chemical analytical method and spectrum analytical method.The results showed that temperature was the most immediate parameter characterizing the maturity degree of high temperature compost;Along with the process of compost,C/N and NH~+_4N content of pile body showed a downward tendency,while HA/FA showed a upward tendency.Both of these parameters could reflect the maturity degree of high temperature compost well,thus both of them could be used as the index to reflect the extent of compost decomposition.The visible spectrum,infrared spectrum and nuclear magnetic resonance spectrum of humic acid in compost were an important reference to the structure change of organic matter and determination of maturity degree of compost.In the process of compost,the maturity index of compost correlated to the change regularity of germination rate of seed to some extent.