Evaluation of Barley-Hairy Vetch Mixed Cropping as Green Manure for Biomass and Nitrogen Production

The mixtures of legumes and non-legume cropping after rice cultivation are widely used for green manure production in Korea.However, there is little information on how the species proportion may affect land use efficient and green manure quality.In this study, green manure N accumulation and Land Equivalent Ratio (LER) was tested with differential seeding ratios using barley and hairy vetch as a green manure.The species proportion influences the biomass production (ranging from 10.74 to 13.34 Mg ha -1 ) and N accumulation (ranging from 256.3 to 249.7 kg ha -1 ).The N accumulation in hairy vetch mixed, even at 25% of its full sowing proportion, was three times higher than that of pure stand of barley.The N accumulation of barley increased linearly with hairy vetch proportion on the total biomass.The mixtures were more efficient than the pure crops in terms of biomass production (LER>1) and N accumulation (LER>1).Therefore, this results suggest that adopting mixture barley with hairy vetch produce a high amount of biomass with higher quality compared with pure stand of barley.