차나무 2중 해가림 터널식 삽목의 적정 상토깊이 및 월동방법

Optimum Depth of Rooting Media and Wintering Method for Double Shading & Tunnel Type Cutting Nursery of Tea Plant(Cammellia sinensis L.)

차나무 삽목상의 적정 상토 두께, 삽목상의 온도를 낮추는 방법, 월동방법을 구명하여 우리나라 남부지방에 적합한 2중 해가림 터널식 삽목기술을 개발한 결과는 다음과 같다. 1. 7월 하순부터 8월 중순까지 1중 해가림 삽목상은 최고온도가 40℃ 이상이 많아 삽수의 발근에 부적합 하였으나 2중 해가림 삽목상의 온도는 23～32℃를 유지하여 차나무 발근에 적합한 온도인 25～30℃에 근접함으로서 발근에 유리한 조건이었다. 2. 육지모래와 황토의 혼합토 및 마사토 모두 상토를 5㎝ 깊이로 설치한 곳에서 발근율이 각각 73.6%, 65.9% 이었다. 10㎝ 에서는 각각 95.0%, 91.7% 이었고 15㎝ 에서는 각각 94.2%, 86.7% 이었으나 10㎝와 15㎝ 간의 유의성이 없었다. 3. 제주도에서는 모든 처리에서 묘목의 동해가 없었고, 무안에서는 1중 비닐터널을 설치한 것에서는 중간정도(3)의 동해가 관찰되었고 2중 비닐터널 설치 및 2중 비닐터널+전열선을 설치한 곳에서는 동해가 없었다.

This experiment was conducted to develop "double shading & tunnel type cutting method of tea plant(Cammellia sinensis L.)" suitable for Korean environment by determining of temperature control method during the rooting period, depth of rooting media and wintering method in cutting nursery. The temperature of double shaded cutting nursery during the rooting period were maintained from 23℃ to 32℃ which are optimum for rooting of cutting whereas the temperature of single shaded cutting nursery were reached to 40℃ which was disadvantage condition. The rooting ratio of cutting in 5㎝ nursery in depth amassed by sand+clay or sand loam were 73.6%, 65.9% while 10㎝ were 95.0%, 91.7%, and 15㎝ were 94.2%, 86.7% respectively. Significant difference of rooting ratio were not shown between 10㎝ and 15㎝ nursery in depth. In the experiment of Jeju Island, the frost damage of nursery plants were not observed in all wintering treatments. In the experiment of Muan region, middle degree of frost damage were observed in nursery plant of single plastic tunnel but not observed in nursery plant of double plastic tunnel and doble plastic tunnel + heating element.