Field Decomposition of Corn Cob in Seasonally Frozen Soil and Its Intrinsic Influencing Factors: The Case of Northeast China

Returning corn cobs to the field during kernel harvesting is an effective way improve soil properties and increase crop yield. However, seasonally frozen seriously hinders decomposition process of cobs. To explore characteristics promote decomposition, in this study, nylon mesh bag method was used perform tests for 150 days. Fiber composition analysis microstructure observation were carried out. The results showed that cob influenced by temperature, precipitation, environment. 150-day cumulative rates pith, woody ring, glume 40.0%, 24.2%, 36.3%, respectively. Caused difference fiber compositions, speeds pith much higher than ring. complex microstructures led differences accessibility cellulose, which indirectly characteristics. homogeneous sponge-like structure increased cellulose ultimately accelerated while compact lignocellulosic ring hindered process. Compared with stalk, had similar or even better excellent application prospects.