关键词: 混合堆肥, 花卉秸秆, 纤维素分解菌, 正交试验

Abstract: A co-composting system was set up to study the characteristics of the mixed composting of vegetable wastes and flower stalks. The result showed that an ideal fermentation state could be achieved when vegetable wastes and flower stalks were mixed at the weight ratio of 2∶3 and at a ventilation rate of 0.3m³/h in a 100L composting reactor. Some effective cellulose-degrading microorganisms were screened and isolated at the different stages of co-composting on cellulose Congo red agar using cellulose as sole carbon source, among which, 7 were fungi and other 25 were bacterial. All isolates grew quite well on cellulose Congo red agar and clear zone appeared around the colonies. Four highly effective combinations were obtained by means of orthogonal test, which showed the ability of initiating filter paper degradation in three days' incubation in broth medium. The study provided the evidence for the feasibility of developing the active microorganism with high capability of degrading cellulose components in order to enhance the degradation of flower stalks during the co-composting of vegetable wastes and flower stalks and solved the problem of the unsynchronous fermentation of different substrates in the system.

Key words: co-composting, flowere stalk, lignocelluloses-degrading microorganism, orthogonal test