Effects of One Chemical Composting Promoter and Microorganism Composting Preparations on Fresh Cow Dung Compost

The traditional composting method is obviously limited for commercial production of organic fertilizers,due to its requirement of large space,long duration of fermentation,with low degree of harmfulness-free and nutrient supply.An experiment was carried out to observe the effects of a composting promoter and different microorganism composting preparations on fresh cow dung compost,with objectives to study the function of adding materials for accelerating fermentation,through which harmfulness-free national resources should be achieved.The results showed that the time required for completing the fermentation ranged as follows:without any promoterthe chemical promotercombination of the chemical and microorganism promotermicroorganism promoter.Total N concentrations for different treatments increased after the completion of compost.The concentrations of total P and K increased at all treatments after fermentation to different extent,with the highest in T3 and the lowest in T5.The addition of the chemical promoter decreased the concentration of available Cu and Zn.