Biomass, Nitrogen, and Phosphorus Productivities of Green Manure by Barley and Hairy Vetch Mixtures
2018
Lee, C.R., National Institute of Agricultural Sciences, Wanju, Republic of Korea | Kim, P.J., Gyeongsang National University, Jinju, Republic of Korea | Oh, Y.R., National Institute of Agricultural Sciences, Wanju, Republic of Korea | Park, C.B., National Institute of Agricultural Sciences, Wanju, Republic of Korea | Park, K.L., National Institute of Agricultural Sciences, Wanju, Republic of Korea | Nam, H.S., National Institute of Agricultural Sciences, Wanju, Republic of Korea | Park, G.C., National Institute of Agricultural Sciences, Wanju, Republic of Korea
Green manure crops can be efficient replacements of high nutrient materials such as livestock compost, organic fertilizers, etc. in organic farming. Grass-legume mixtures or mixed cropping of legumes with non-legumes can aid in abating the shortcomings of each plant type under monoculture (i.e. legumes have low biomass yields while grasses are poor at fixing nitrogen). This study was conducted to investigate the effects of barley (B) and hairy vetch (H) mixtures on green manure yield in nutrient accumulated organic upland soils of Korea. In one cropping season, single crops of barley and hairy vetch (Barley: 160 kg/ha, Hairy vetch: 90 kg/ha) as well as mixtures of both crops at different seeding rates (B66:H33, B33: H66) were grown and the obtained results are as shown below. The biomass yield and nutrient productivities were higher in barley-hairy vetch mixture. The biomass yield and total phosphorus content were higher for the mixed crops by 78~132% and 200% respectively than those of the hairy vetch monoculture. Total nitrogen content of the mixed crops was also higher than those of the barley monoculture by 43~44%. The biomass yield (5.60 Mg/ha) and nutrient contents (87.7 kg N/ha, 23 kg P2O5/ha) were highest in the case of B66:H33 seeding rate. Accordingly, this study concludes that the barley-hairy vetch mixtures cropped at B66:H33 seeding rate is efficient in increasing green manure productivity due to complementary effects observed and the highest biomass yield and nutrient contents.
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