Dr NH An1, SM Lee2, JR Cho3, JA Jung4, MJ Kong5, CR Lee6
1Rural Development Administration, Wanju-gun,, South Korea, 2Rural Development Administration, Wanju-gun,, South Korea, 3Rural Development Administration, Wanju-gun,, South Korea, 4Rural Development Administration, Wanju-gun,, South Korea, 5Rural Development Administration, Wanju-gun,, South Korea, 6Rural Development Administration, Wanju-gun, South Korea
Maintenance of soil organic matter is important for the productivity of agroecosystems. It has beneficial effects on soil biological, chemical and physical properties, which influence the productive capacity of agricultural soils. This study was conducted to investigate the effects of organic farmland soil and nutrient management on soil properties depending on organic resources (animal manure compost and green manure [hairy vetch]), tillage systems (tillage and no tillage), and crop rotations (corn-wheat, corn-hairy vetch). It was found that the application of organic matters such as animal manure compost and hairy vetch, increased the soil organic matter content, the soil microbial density and microbial biomass C content as compared with the chemical fertilizer treatment. It was also confirmed that the functional diversity of soil microbial community was increased. As a result of the comparison with the crop rotations and single cropping, the soil chemistry showed no significant difference between the treatments, but the corn-wheat and corn-hairy vetch rotation treatments tended to have higher microbial biomass C content and shannon’s diversity index than the single cropping. Soil chemical properties of tillage and no-tillage treatment showed no significant difference between treatments. There was no statistically significant difference in substrate utilization of soil microbial community between tillage and no-tillage treatment. Correlation analysis between soil chemical properties and soil microbial activity revealed that soil organic matter content and exchangeable potassium content were positively correlated, with statistical significance, with substrate utilization, and substrate richness. To conclude, organic fertilization had positive effects on the short-term improvement of soil chemical properties and diversity of microbial communities.