전북 진안지역 강우의 화확성분 조성 및 천연공급량 = Originals : Composition of Chemieal Components and Amount of Natural Supplies by Precipitation in Chinan Area of Chonbuk Province

다국어 초록 (Multilingual Abstract)

Changes of chemical components and natural supplies by precipitation at agricultural zone in Chinan area of Chonbuk province from May 1, 1997 to April 30, 1998 were investigated. pH of precipitation ranged 6.44∼7.24 and EC showed 14.23∼30.67μS/㎝. The total∼N, NH4-N and NO3-N were 1.43∼10.14, 0.57∼4.39, and 0.18∼1.69㎎/L respectively. The content of total-P showed 0.015∼0.087㎎/L but ortho-P was not detected. The content of suspended solid, Ca^(++), Mg^(++), Na^+ and K^+ showed 3.6∼15.3, 0.37∼1.66, 0.17∼0.52, 0.22∼0.87, and 0.17∼0.58㎎/L. The content of SO42- and Cl- showed 3.73∼14.47㎎/L and 1.02∼7.24㎎/L respectively. Only Cu and Zn of heavy metals were detected 0∼0.019㎎/L, and 0.009∼0.098㎎/L, but Cd, Cu, Ni and Cr were not detected. Natural supplies of chemical components were 39.48㎏/ha/yr of total-N, 21.82㎏/ha/yr of NH₄-N, 6.90㎏/ha/yr of NO₃-N and 0.68㎏/ha/yr of total-P. Also Ca^(++), Mg^(++), Na^+ , K^+, SO₄^(2-) and Cl^- were supplied 14.46, 5.00, 7.26, 5.46, 98.76 and 31.16㎏/ha/yr respectively. Only of heavy metals were supplied 0.024㎏/ha/yr of Cu and 0.044㎏/㏊/yr of Zn.