Effect of Hairy Vetch Green Manure on Nitrogen Enrichment in Soil and Corn Plant
2005
Seo, J.H. (National Institute of Crop Science, RDA, Suwon, Republic of Korea), E-mail: [email protected] | Lee, H.J. (Seoul National University, Seoul, Republic of Korea)
Fresh hairy vetch (HV) as a green manure equivalent to 240 kg N ha-¹ were incorporated into soil at corn planting in 1997 and 1998 to clarify the effects on changes of nitrogen (N) content in soil and corn plant. The influences of HV for the N of soil and plant were compared with those of ammonium nitrate (AN) in terms of mineralization and microbial biomass. During early decomposition of HV residue, the content of NO₃-N in HV plot was as much as 60-70% of that in AN plot in surface soil of 0-15 cm depth. In addition, soil microbial biomass N (SMBN) by HV residue was increased up to 10-20 mg kg-¹ more than that by AN.
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