나리의 상자재배시 재식밀도, 배지 및 양액농도가 생육에 미치는 영향

Effect of Planting Density, Growing Medium and Nutrient Solution Strength on Growth and Development of Lily in Box Culture

나리의 상자재배시 재식밀도, 배지 및 양액농도가 생육에 미치는 영향에 대하여 조사 분석한 결과는 다음과 같다. 재식밀도가 나리의 맹아에 미치는 영향은 14, 18 및 22구 처리가 1일 정도 맹아가 빨랐고, 개화는 22구 처리에서 가장 빨랐고 6구 식재처리가 가장 늦어 재식밀도가 높을수록 개화가 빠른 경향을 보였다. 재식밀도가 높을수록 초장생장이 증가되어 절화장이 길었으나 절화중, 화수 등 절화품질은 재식밀도가 낮을수록 증가하였다. 블라스팅이나 생리장해도 22, 18 및 14구순으로 재식밀도가 높을수록 발생율이 증가되었다. 구고, 구폭, 구중, 인편수, 인편중 모두 22구 처리를 제외한 모든 처리에서 정식전보다 우수한 결과를 나타냈으며 재식밀도가 높아질수록 구근비대가 좋지 않았고 부패율도 증가하였다. 배지성분 변화는 구근 정식전에 비해 pH는 모든 처리에서 낮아졌으며, 재식밀도가 높을수록 더욱 낮아지는 경향을 나타내었다. P, K, Ca, Mg 성분은 정식 전에 비해 높아졌으나, K와 Ca 성분은 재식밀도가 높을수록 오히려 낮아지는 경향을 나타내었다. 절화품질은 왕겨+코이어(1:1, v/v)배지가 우수하였으나 다른 배지와 큰 차이는 없었다. 또한 절화 후 구근 비대에서는 나리전용배지, 펄라이트+피트모스(1:1, v/v)배지에서 우수한 결과를 보였으며, 부패율은 왕겨+코이어(1:1, v/v)배지가 가장 높게 나타났다. 화뢰 출현기부터 절화기까지 양액농도별 처리에서 원시 1배액 처리가 절화장, 절화중, 화수 등 절화품질이 가장 좋았으며, 개화는 무처리, 원시 1/3배액 처리 순으로 농도가 낮을수록 개화가 빨랐다. 절화 시 양액 농도별 엽분석 결과 처리농도가 높을수록 N와 K의 흡수율이 높게 나타났으며, Ca와 Mg도 농도가 높을수록 증가추세를 보였으나 P는 모든 처리에서 흡수율이 가장 낮았다.

This purpose of this study was to examine the effect of planting density, growing medium and strength of a nutrient solution (National Horticultural Research Institute's nutrient solution: HRI's) on the growth and development of Oriental hybrid lily 'Le Reve' in a box cultivation. The planting density with 14, 18 and 22 bulbs had sprouting one day earlier than other treatments. Planting density of 22 bulbs flowered first, while six bulbs flowered the last, indicating that higher planting densities led earlier flowering. The increasing planting density increased stem length of cut flowers. On the other hand, cut flower quality was improved when the planting density was lower. The incidence of physiological disorders such as blasting was more frequent in planting density of 22, 18, and 14, indicating that higher planting densities caused higher incidences of physiological disorders. All planting densities except 22 bulbs displayed superior results in width, weight, number, and scale weight of the bulbs. Greater planting densities led to inferior bulb enlargement and an increased decomposition rate. pH decreased in all treatments after the bulb enlargement and decreased more as the planting density increased. Contents of P, K, Ca, and Mg increased, while contents of K and Ca decreased, as the planting density increased. The rice hull+coir (1:1, v/v) treatment was better than others, but did not show that much of a difference. Moreover, in bulbs enlargement after cut flower harvest, lily medium and perlite+peat moss treatments showed superior results, and decomposition rate was the greatest in the rice hull+coir (1:1, v/v) treatment. In the HRI's solution strength treatment from the period of flower bud emergence to flower harvest, higher solution strengths gave better cut flower quality in terns of length, weight, and number of flowers. The non-treated control and one third strength of a HRI's solution hastened flowering, indicating that lower strengths led to earlier flowering. According to the results of leaf analysis as affected by solution strength during the flower harvest, absorption rates of N and K were greater when the strength was higher, and Ca and Mg showed the same tendency. On the other hand, the absorption rate of P was the lowest in all treatments.