Effect of Consequent Application of Pig Manure Compost on Soil Chemical Properties and Dehydrogenase Activity in Volcanic Ash Soil

This study were carried out to evaluate effect of consequent application of pig manure compost (PMC) on soil chemical properties, dehydrogenase activity, and yield of potato in volcanic ash soil. The more application rate of PMC increased, the more increased soil pH, total-nitrogen, available phosphate, exchangeable cations (K, Ca, and Mg), heavymetal (Zn and Cu)contents. When application rate of PMC and crop cultivation times increased gradually, soil dehydrogenase activity was significantly increased. After third cultivation period, dehydrogenase activity showed PMC 2 ton (3.5), PMC 4 ton (6.3), PMC 6 ton (8.0 ug TPF $g^{-1}\;24h^{-1}$), respectively. The activity was twofold higher than first cultivation period. During the third cultivation period, dehydrogenase activity increased linearly comparison to Cu and Zn contents and that was correlated with Cu ($R^2$=0.907) and Zn ($R^2$=0.859) content, respectively. As the application rate of PMC increased, the yield of potato increased, but NPK+PMC 2 ton treatment was more higher than other treatments.

돈분퇴비 연용이 감자재배 화산회토양의 화학성과 탈수소 효소활성에 미치는 영향

화산회토양에서 돈분퇴비 연용이 감자재배 토양의 토양화학성과 탈수소 효소활성 및 감자수량에 미치는 영향을 평가하고자 수행 하였다. 돈분퇴비 시용량이 증가할수록 점차적으로 토양 pH, 토양질소, Avail.-Phosphate, Exch.-K, Exch.-Ca, Exch.-Mg, Zn, Cu 함량이 증가하였다. 돈분퇴비 시용량이 많고 작기가 많아질수록 토양 탈수소효소활성은 증가하였다. 3작기 후 Dehydrogenase활성은 돈분퇴비 2톤구 3.5, 4톤구 6.3, 6톤구 8.0 ug TPF $g^{-1}\;24h^{-1}$를 나타냈으며 1작기 후 보다 2배 이상 증가하였다. 3작기 동안 Cu와 Zn함량이 증가함에 따라 dehydrogenase활성이 직선적으로 증가하였으며 Cu는 $R^2$=0.907, Zn은 $R^2$=0.859의 상관관계를 나타냈다. 돈분퇴비 시용량이 많을수록 감자수량은 증가하였으나 표준시비+돈분퇴비 2톤구에서 가장 많았다.