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인삼예정지 관리 작물에 따른 인산농도 경감 효과
Effect of Mitigation of Phosphate Concentration in Ginseng Preparation Field by Crop Management
- 언어ENG
- URLhttps://db.koreascholar.com/Article/Detail/326462
Background : Ginseng farmers prefer first planted field because of replant failure. But the accumulation of nutrients is higher in the first planted field due to using large amounts of chemical fertilizers and manure. The higher phosphate concentration in preparation field decreased emergence ratio and occurred leaf chlorosis in ginseng. The purpose of this study was to develop a technology for reducing phosphate concentration in preparation field of ginseng. Methods and Results : This study was performed in farm's fild located Yeongju in 2015. Treatment of plots consisted of sudangrass, maize, deep plowing + sudangrass and microbes(Rhodobacter sphaeroides, Bacillus subtilis, streptomyces griseus) + sudangrass. sudangrass and maize were sown in early May to 5kg / 10a. Microbes diluted 500 times were treated to drench the soil before sowing crops(400L/10a). The main survey was yield of crop, soil chemical properties, reduction ratio of phosphate and changes in available phosphate. Reduction ratio of phosphate in the plot of maize and Rhodobacter sphaeroides were 27.9% and 24.3%, respectively, which were higher 2∼5% than the control plot. Fresh weight yield was the highest with 11.1ton / 10a in the plot of maize and ratio of dry matter was the highest with 27% in the plot of maize. Conclusion : The phosphate removal ability of maize was better than sudangrass in phosphate accumulation soil. Subsoil reversed using excavators used by some farmers could not mitigate of phosphate and salts concentration in preparation field. The soil that phosphate concentration is more than 1,000mg/kg is required a long-term management.
