Growth Condition of Allium hookeri root By Heat Conservation Materials during Overwintering

Allium hookeri is used for food and medical materials in Asia. It is a wild herb distributed in India and Myanmar but it is cultivated as a vegetable crop in Korea. It contains dietary sulfur compounds about six times higher than Garlic and protein, sugar, fiber, ascorbic acid, phytosterol and total phenol much higher than Onion. This study was conducted to identify appropriate heat conservation materials on A. hookeri during overwintering period. It was prepared approximately 5~6cm length of root which contains four latent bud. In this study, Five mulching materials used during overwintering period were horticultural bed soil(30mm thickness), straw(40mm thickness), vinyl(0.1mm, transparent), white nonwoven fabric(60g/㎡) and the control. During the investigation, the surface on minimum temperature by treatments was -15.8℃ ~ -2.4℃, and maximum temperature by treatments was 9.8℃ ~ 28.7℃. In the point of 15cm under the ground, average humidity value on horticultural bed soil was 72.1%, on white nonwoven fabric was 53.3%, on vinyl was 59.6%, on straw 46.2%, and on the control was 55.7%. The latent bud in horticultural bed soil shoot out on February. 27, in white nonwoven fabric and vinyl shoot out on February. 28 and in straw and control shoot out on March. 2. On March. 9, horticultural bed soil treatment all shoot out, 95% can be seen on white nonwoven fabric, 76% can be seen on vinyl, 52% can be seen on straw and 46% can be seen on the control. The growth characteristics observed after overwintering period. The results suggested that horticultural bed soil(30mm thickness) greatly increases the fresh weight. The most adequate type of Mulching materials on the plant growth of A. hookeri after overwintering was horticultural bed soil(262% higher than the control) and mulching materials were ranked in weight order. [white nonwoven fabric(45.1% higher than the control), vinyl(7.4g/plant) and straw(2.3% higher than the control)]. Also, we measured root length, root thickness, dry weight, etc. With these results, this study suggested that adequate mulching materials on the growth of A. hookeri during overwintering was Horticultural bed soil(30mm thickness).