Effect of Application Level of Calcium Hydroxide on Brown-Leaf Symptom and Root Yield of Panax ginseng Cultivated in Paddy Soil
2015
Lee, S.W., NIHHS, RDA, Eumseong, Republic of Korea | Park, K.H., NIHHS, RDA, Eumseong, Republic of Korea | Lee, S.H., NIHHS, RDA, Eumseong, Republic of Korea | Jang, I.B., NIHHS, RDA, Eumseong, Republic of Korea | Lan, J.M., NIHHS, RDA, Eumseong, Republic of Korea | Kim, K.H., NIHHS, RDA, Eumseong, Republic of Korea
Physiological disorders such as symptoms in leaf colored with brown spots are so many occurred in ginseng garden cultivated with paddy soil. This study was carried out to inhibit the symptoms of brown-colored leaf in 3-year-old ginseng by fertilizing calcium hydroxide [Ca(OH)2] of 100 ~ 400 kg per 10a on paddy soil before transplant of seedling. Soil pH was rapidly increased, while Fe was decreased in soil by the increase of application level of calcium hydroxide. Soil pH was increased from 4.53 to 6.18 when calcium hydroxide was fertilized at level of 100kg per 10a. The content of Fe in ginseng leaf was decreased more than the control by fertilizing calcium hydroxide in soil. Ratio of brown-colored leaf and plant height and leaf area were decreased by the increase of calcium hydroxide. Ratio of survived root and yield of root showed the peak at the application level of 100 kg per 10a, and both of them were gradually decreased by the increase of calcium hydroxide. The decrease of missing plant rate above the application level of 200 kg per 10a had a negative effect on the decrease of yield of root.
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