| Abstract |
In this study, the effects of application methods of green manure on soil properties were evaluated by investigating the soil physicochemical properties. The maize field located in Gangwon province was selected and two plant species, rye (Secale cereale L.) and hairy vetch (Vicia villosa Roth), were grown in the field and used as green manure. After harvesting, the crop residues were mixed with the 0-25 cm top soil with conventional tillage (GCT) and were top dressed on the soil surface with no-tillage (GNT) on June 21, 2011. To ensure the changes in soil physicochemical properties, soil samples were collected at 10 cm depth and the bulk density was also determined on August 26, 2011. Soil layers were divided into two parts of 0-30 cm and 30-60 cm for determining soil biological properties such as soil microbial biomass. At 0-25 cm, the differences of soil physical properties such as bulk density (GNT, 1.29 Mg/m3; GCT, 1.52 Mg/m3) and porosity (GNT, 51.4%; GCT, 42.5%) were observed. It was mainly affected by seasonal rainfall rather than the application methods. Lower pH (GNT, 4.61; GCT, 5.29), higher EC (GNT, 0.34 dS/m; GCT, 0.07 dS/m) and higher nitrate content (GNT, 34.30 mg/kg; GCT, 3.18 mg/kg) were found under GNT than those under GCT. Soil microbial biomass under GCT was higher than that under GNT. It may be resulted from increasing soil C and N from the addition of green manure crops.
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1-옥용식(3교정)-LeeSS_1.pdf
