Effect of Ferric and Ferrous Iron Irrigation on Brown-Colored Symptom of Leaf in Panax ginseng C. A. Meyer

Abstract

: To study the cause of physiological disorder in leaf of ginseng cultivated at paddy soil, the degree of browncolored symptom (BCS) and the contents of inorganic matter in leaf were investigated by irrigating the solution of ferric and ferrous iron of 0.1~2.0%, and citric acid of 1.0~4.0% on bed soil, respectively. Ratio of BCS by variety was as high as 85.0% in Yoenpoong, while it was as low as 5.4%, 7.5% in Chunpoong and Hwangsook, respectively. The contents of inorganic matter of leaf in Yoenpoong were lower in P 2 O 5 , Ca, and Mg, while it were higher in K, Fe, and Mn than other variety. Iron solution caused BCS more distinctly when each ferric and ferrous iron were dissolved with 1.0% citric acid than when each iron was dissolved without citric acid. Ferric iron caused BCS more effectively than ferrous iron. BCS occurred in 4.0% citric acid was as same as 2.0% ferric iron mixed with 1.0% citric acid. Low P 2 O 5 and high Fe content in leaf appeared in both of artificial and natural symptoms. We concluded that excessive Fe uptake caused BCS to leaf because the solubility of iron was increased in condition of low soil pH.

Effect of Ridge Height on Peanut Growth and Soil Physicochemical Properties of in Paddy Field

“…논을 밭으로 이용하면 입단형성, 지력 증진, 통기성 증가, 병충해 억제, 수량증대 효과 (Lim et al, 2014;Oh et al, 2016)가 있지만 밭 작물을 논에 재배할 때 논 토양 특성에 따른 배수불량에 의한 습해발생 (Lee et al, 2009(Lee et al, , 2012, 담 수와 배수의 반복으로 인한 산화, 환원철의 과잉흡수 장해 발생 (Sohn et al, 2009;Lee et al, 2013Lee et al, , 2014 (Plamenac, 1988;Evans et al, 1991;Jung et al, 2011). 토양수분 과다로 인해 발생하는 작물의 스트레스에 대한 반응은 작물의 종류와 생육시 기에 따라 큰 차이가 있으며 (Jung et al, 2011), 콩의 경우 다른 생육시기에 비해 개화기에서 협 형성기에 수분과다에 스트레스를 가장 많이 받고 수량 감소가 크다고 알려져 있다 (Griffin and Saxton, 1988;Scott et al, 1989;Evans et al, 1991).…”