Abstract:

The paper studied the organic mineral complex component and distribution character of organic carbon of black soil under various cultivation pattern by means of ultrasonic dispersion and particle assortment method, in order to discuss the different fertilizer and farming methods of soil organic inorganic compound composition and distribution of organic carbon impact. The high yield soil of Songliao Plain was used as the object of study. The results showed that, organic mineral complex in black soil the finesand size complex was protagonist, about 40%-70% of the total quality. The clay size complex and the silty size complex were marginalia. The result after comparing with the control group soil showed that, the storage of clay size complex is lower than control group soil, the mean difference was 5.05% and 7.60%. The comparing with particle size distribution showed that the silty size complex decreased about 0.1%-3.7%, the finesand size complex and the clay size complex creased about 0.1%-5%. The organic carbon primarily consisted in the small granule diameter of organic mineral complex. There was a accumulation tendency for organic carbon to the small granule diameter of organic mineral complex (A1>A2>A3). The result after comparing with the control group soil showed that, the content of organic carbon in organic mineral complexes was higher than control group soil (No.1>No.6, No.10>No.14), and the reserves of organic carbon of clay size complex was lower than control group soil (No.1No.6, No.10>No.14).