Use of Hairy Vetch Green Manure as Nitrogen Fertilizer for Corn Production
2000
Seo Jong-Ho | Hur Il-Bong National Crop Experiment Station, RDA, Suwon (Korea Republic)
Hairy vetch (Vicia villosa Roth) winter annual is very effective on reducing chemical nitrogen fertilizer for subsequent corn by fixed organic green manure nitrogen fixed during hairy vetch growth. In this experiment, hairy vetch produced above-ground dry matter of 5 ton/ha, nitrogen yield 200 kgN/ha, at corn planting on the average during 1997 and 1998. Changes in corn yield and nitrogen uptake for two years were investigated after application of nitrogen fertilizer 0, 60, 120, 180, 240 kgN/ha on plot of winter fallow and hairy vetch green manure, respectively. Nitrogen status such as ear-leaf N%, SPAD value at silk and dough stage, and corn yield decreased in proportion to reduction of nitrogen fertilizer at winter fallow, but nitrogen status and yield of corn were not different among nitrogen fertilizer rate at hairy vetch green manure.
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