The Effect of Application Levels of Slurry Composting and Bio-filtration Liquid Fertilizer on Soil Chemical Properties and Growth of Radish and Corn
2011
Kang, S.S., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Kim, M.K., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Kwon, S.I., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Kim, M.S., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Yoon, S.W., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Ha, S.G., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Kim, Y.H., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea
A liquid fertilizer treated with slurry composting and biofiltration (SCB) process has been applied increasingly on agricultural field but the effects on the soil properties and crop production has not been throughly evaluated. This study was conducted to investigate the effect of the SCB application on soil chemical properties and the growth of radish and corn. SCB liquid fertilizer as a basal fertilization was treated with five levels based on 6 kg 10a-¹ for radish and 10 kg 10a-¹ for corn. The experimental design was the completely randomized block design with five levels and three replicates. Electrical conductivity (EC), NO₃-N, Exch. K and Exch. Na increased depending on the treatment levels of SCB. There were no changes in soil organic matter, Avail. P₂O∧5, Exch. Ca and Exch. Mg. EC, NO₃-N and Exch. Na content decreased as precipitation increased. Especially, they decreased up to the initial condition before the treatment after the heavy rainy season in 2008. Although Exch. K decreased at the rainy season, they remained relatively higher content after the experiment on August, 2008. Fresh weight and the amount of N uptake of radish increased due to the levels of SCB, but corn did not present any significant increase. It is recommended that we need to decide the proper amount of SCB as well as the application method on the field to increase the productivity and decrease environmental stress. Additional experiments also need to clarify the effect of the trace element and heavy metal accumulations due to long term application of SCB.
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