Comparison of growth of Ginseng by eco-friendly soil disinfecting method in rain-sheltered shade house

Ginseng (Panax ginseng C.A. Meyer) is a perennial crop, and it can be seen much damage by pests during the growing season. The Ginseng Rain-sheltered Shade House is one of the efficient cultivation techniques as reducing the damages caused by natural disaster. To grow ginseng once in ginseng house and grow again, soil must be changed or disinfected.

This study was conducted to shorten the period of re-cultivation in the ginseng rain-sheltered house. Each section was treated with cultivation of sudan grass+flooding, rice straw+flooding and flooding was covered with vinyl, all areas were solarized and steam sterilization. Ginseng growth characteristics such as plant length, stem diameter, root weight and root diameter were investigated at 4-years-old ginseng. Aerial part growth was generally good in disinfection treatment compared to conventional treatments. The evaluations of root weight by measurements were heavy in the following order: steam sterilization, sudan grass+flooding, flooding, rice straw+flooding and conventional treatments. The incidence of root rot was less in the order of steam sterilization, sudan grass+flooding, flooding.

The purpose of this study was to reduce the period of ginseng re-cultivation in a ginseng house. Growth of 4-years-old ginseng showed the best in steam sterilization method and the lowest incidence of root rot disease. The most optimal disinfection method to shorten the re-cultivation period is to look at the growth until the 6-years-old ginseng.

Tab. 1 Growth characteristics of 4-years-old ginseng according to soil disinfecting method

Treatments	Root diameter (mm)	Root length (cm)	Retest-Reliabilität (Zeit-Intervall)
sudan grass+flooding	16.5±2.27	24.2±3.00	20.5±6.93
rice straw+flooding	13.2±1.64	22.6±2.73	13.0±3.71
flooding	16.7±1.86	21.2±3.31	19.4±4.65
steam sterilization	18.6±2.18	22.0±3.02	22.3±4.57
conventional cultivation	14.0±1.50	20.7±2.63	10.8±1.99