Abstract:

Obtaining organic fertilizer by composting can not only solve the problem of organic waste pollution and shortage of organic fertilizer in Tibet, but also can improve the ecological environment. The plateau is characterized by the large temperature variation between day and night, perennial low temperature and low air humidity. At present, there are few reports focused on composting in the plateau environment. In this paper, the initial parameters of composting fermentation with highland barley straw and cow dung as the main raw materials were studied under plateau environmental conditions. The results showed that the composition of feedstock was the most important factor affecting the thermophilic phase and the degradation rate, followed by the ventilation rate. When the ratio of cow dung to highland barley straw was set to 2:1, the moisture content was set to 60%, and the ventilation rate and time was set to 2 m³/min and 0.5 min/d, respectively, better composting performance could be obtained. The results of this study could provide reference for composting fermentation under plateau conditions.

Key words: plateau, aerobic composting, fermentation parameters, straw