YANG Xue1, LIAN Bin2*,ZHU Xiao-ling 1 , ANYan-ling1 , CHEN Jun1 , ZHU Li-jun1
（1.Guizhou Provincial Key Laboratory of Karst Environment and Geological Hazard Prevention,College of Resources and Environmental Engineering, Guizhou University, Ministry of Education, Guiyang, 550003, China；
2. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China）
Abstract：This study analyzed the impact of low-grade potassium-bearing mineral powder(PBMP) and other additives on the contents of potassium and phosphorus, nitrogen preserving and deodorizing in the compost of chicken manure . Adding respectively 0%, 10%, 20%, 30%, and 40%PBMP into the compost with a fixed ratio of chicken manure to sawdust contents, then the material mixture was inoculated by 0.2%effective microorganism agents to ferment for 35 days. On the basis of the records that the temperature,pH value, NH3 release and effective potassium contents of treatments were continuously monitored, thus the optimum dosage of PBMP was obtained to be 20% ~ 30%. Then, respectively adding 20% or 30% PBMP, mountain soil, fly ash and quartz additives into the material mixture with a fixed ratio of chicken manure, sawdust and superphosphate contents, which were inoculated by 0.2%effective microorganism agents to ferment for 35 days, the nutrient of every compost was measured.The resultsshowed that the manure compost with PBMP ,calcium superphosphate and sawdust additives between 20% and 30% can remarkably regulate the pile temperature, shorten composting time, reduce the compost of NH3 emission, improve total nitrogen, available potassium and available phosphorus of the compost. After 35 days, the mean reduction rate of NH3 emission reached 71.26%, total nitrogen and available potassium are increased by 15.78% and 75.96% compared to the control, and available phosphorus contents are improved by 16.78% compared to the compost at the beginning of fermentation.The results of the present study provide a theoretical basis for the use of PBMP as a way to reduce nitrogen loss and improve available potassium in the chicken manure fermentation.
Key words: aerobic composting; chicken manure; PBMP; NH3; P; K
EARTH AND ENVIRONMENT Vol. 40, No.2, Tot No.288, 2012, Page 286-292
