초 록 1. 인삼묘포에 Captan, Difolatan, Zineb, Maneb와 PCNB를 일주일 간격으로 토양관주 하였다. 처리하기전과 2회 및 4회처리후에 각각 Rhizoctonia solani, Pythium debaryanum, Fusarium 그리고 Trichoderma 균총의 숫적 (수적)변화를 Boosalis의 특별잔사법에 의해서 조사하였다. 우리나라에서 인삼(Panax ginseng)의 모잘록병균으로서 Pythium debaryanum을 처음으로 기술하였다. 2. Rhizoctonia solani, Pythium debaryanum의 수는 토양관주에 관계없이 시일이 경과함에 따라서 점차로 감소하였고 Fusarium 및 Trichoderma는 오히려 증가하였다. Rhizoctonia solani의 수는 PCNB에 의해서 현저하게 감소하였고 다른 약제에 의해서도 대조구 보다 감소하였다. 3, Pythium debaryenum은 Zineb, Maneb, Captan, Difolatan의 순으로 고 수가 증가하는 반면 Fusarium은 일정한 경향을 볼 수 없었다. Tichroderma를 제외한 모든 균의 숫적 변화는 시일의 경과에 대하여 수준에서 유의성이 있었다. 4. 토양관주에 의한 약해는 Maneb, Zineb, Captan 구에서 나타났고 묘삼 뿌리의 생체 무게는 Difolatan, PCNB, Maneb구에서 대조구 보다 증가하였다.

Background : Multi-stage system were used for development of stable ginseng seedling production. Bed-soil for the production of ginseng seedling in the multi-stage was similar to the conventional bed-soil but the weight of the bed-soil was high and the efficiency of operation in the multi-stage was lowered. In this study, the yield and quality of ginseng seedling was investigated by commercial lightweight bed-soil in the multi-stage facilities, and the possibility of application of lightweight bed-soil. Methods and Results : This study was carried out by a 3-stage cultivation bed using a 50 ㎜ sandwich panel in a house shaded with 85% light-shielding net. The width of the cultivating bed was 90 ㎝, the height was 30 ㎝, and the height of each stage was 50 ㎝. In the first and second stages, the amount of light was insufficient, so two rows of fluorescent lamps were installed and the third stage was used natural light. Ginseng seeds were sown on the cultivating bed in November 2016, and ginseng seeds (native species) were sown with a density of 3 × 3 ㎝. The chemical properties of lightweight bed-soil were pH 5.11, and EC 0.76 dS/m. It was suitable for ginseng seedling cultivation. The bulk density was 0.21 Mg/㎥. Among the growth characteristics of the ginseng seedlings, the root length was the longest as 17.0 ㎝ in the conventional cultivation, and the second stage was the longest at 14.8 ㎝ in the multi-stage facility. The root diameter in the multi-stage system was 0.2 - 0.4 ㎜ thicker than the conventional one. Root weights of lightweight bed-soil were similar to those of conventional cultivation. The yield of ginseng seedlings in the 1 st, 2 nd and 3 rd stage was 721.3 g, 692.0 g, and 394.7 g/1.62 ㎡ respectively. Conclusion : In the production of ginseng seedling using multi-stage facilities, the commercial bed-soil was better than the conventional bed-soil (light, workability). The differences in yields in the multi-stage facilities can be overcome if the growth management such as moisture management is more systematic. If we develop the technology to reuse the bed-soil after harvesting the ginseng seedling, it will be economical and able to supply to farmers.

This study was performed to identify the effect of mixed bed soil on growth of aerial parts and root zone of daughter plants for nursery field strawberry seedling raising with expanded chaff. The plant height and leaf area of daughter plants were highest or largest in the mixed soil of ERH +RH (100:0, v/v), followed by ERH+RH (75:25). The higher the mixing ratio of RH, the shorter the plant height or the smaller the leaf area. A similar tendency was observed in fresh weight. Within a root diameter of 0-0.4 mm and a root height range of 0.4-0.8 mm, root surface area and volume were statistically significantly better with treatment of ERH+RH (100:0, v/v) compared to those of roots treated with ERH+RH (75:25), ERH+RH (50:50) and ERH+RH (25:75). The growth rate of aerial parts and root zone of daughter plants were noticeably lower in two mixing ratios of 50:50 and 25:75. According to the mixing ratios of ERH+CD surface treatment, the number of roots was greatest in plants treated with ERH+CD (80:20, v/v) and ERH+CD (85:15) on August 1. However, the number of roots was highest in plants treated with ERH+CD (85:15, v/v) on August 15. Root length was longest in the plant with no treatment, and drastically shortened from ERH+CD (90:10, v/v) in both surface and mixed treatment. Although root weight showed a significant difference in ERH+CD (90:10, v/v) treatment, its increase was gradual. The rate of root growth was highest in ERH+CD (85:15). These study findings suggest that the content ratios of mixed soil ERH+RH (75:25, v/v) or below and ERH+CD (85:15) are thought to be desirable for the production of high quality seedlings.

묘삼 재배시 원야토와 약토의 적정 혼합비율을 설정하고 해가림 시설 설치시 기존관행 방법의 문제점을 개선하고 작업효율을 높이기 위하여 시험을 수행 한 결과는 다음과 같다. (1) 상토조제시 약토의 적정 구성비율 설정시험에서 약토함량이 증가할수록 고상은 감소하고, 공극율과 기상, 토양중 OM과 P2O5 함량이 증가하는 경향이었다. (2) 약토함량별 지상부 생육은 약토함량 증가에 따라 엽면적, 엽록소는 증가하였으며, 지하부 생육중 근경과 근중이 증가하였다. (3) 약토조성별 규격묘 생산량은 백마사 약토비율이 10:1처리에서 사용가능 묘삼은 750개/칸 수준으로 양호하였다. 2. 해가림 (일복) 전주목 적정높이를 설정하기 위한 시험에서 (4) 전주높이별 광량은 전주높이가 높을수록 광량이 많았으며 평균지온은 전주높이가 150 cm에서 낮아 광량과 지온은 비례하였다. (5) 해가림 시설 전주목 높이가 낮을수록 엽록소 함량과 근중이 증가하는 경향이었고, 사용가능 묘삼수는 처리간 유의성은 없었으며, 또한 관행보다는 그 수가 적었지만 전주높이 150 cm에서 740개/칸로 높았다.

The study of this experiment is focused on labor saving of healthy rice seedling production using PSF (polypropylene spunbonded fabrics) as thermal protection material. Several factors such as different compositions of nursery soil and PSF materials were tested to produce healthy rice seedlings. The inner thermal protection material in PE film (polyethylene film) showed 0.9-1.7~circC higher than that of PSF 40-100 ~textrmgm-2 . The light transmittance-ratio also showed similar trends. It is considered that the appropriate PSF material density was 40 gm~textrmgm-2 in accordance with economic values and healthy rice seedlings. Plant height and dry weight according to various nursery soil showed the rang-es of 8.5-14.2cm and 5.5-10.0mg, respectively. In composition of nursery soil, artificial soil combined with paddy soil was effective in producing healthy seedling for rice seedling production. The total sugar content also showed the difference between PSF 40, 60 ~textrmgm-2 PE film (0.43-0.52mg FW ~textrmg-1 ) and PSF 80, 100 ~textrmgm-2 (0.28-0.35mg FW ~textrmg-1 ) and it showed the same tendency among varieties as well as various nursery soil. These results demonstrate that PSF 40 ~textrmgm-2 economically affordable, and can be recommended as thermal protection material for producing good healthy rice seedling.

This experiment was conducted to investigate the effects of turf grass growth to seedling rates and bed soil types. The results of this experiment were summarized as follows; the more increasing the seedling rates, the plant height and leaf length were longer, but the number of leaf and number of branch were fewer. Incase of transplanting of turf grass seedling by rice transplanting machine, it might be considered that the proper alternative bed soil was sandy loam soil with regarding to the economic aspects. The maximum seedling rate of turf grass in the seedling tray for rice was 1,000 of seedling amount due to the nutrient competition with intensive seedling. As the results indicated, it might be recommended that the proper alternative bed soil was sandy loam soil with 1,000 of seedling rates in case of transplanting of turf grass seedling by rice transplanting machine.

Experiments were conducted to find out the optimum level of slow release N fertilizers when total amounts of nitrogen required throughout the growing season in paddy were applied in the soil of seedling box. To evaluate the emergence rate and growth of rice seedlings, five levels of Meister (MS) 10, MS S10, and latex coated urea (LCU) which are equivalent to 0, 40, 60, 80, and 100kg N h a-l were mixed in soil of the seedling box. Emergence rate differed depending on the fertilizers and N levels; in MS 10 plots the emergence rate was 40.8% at 40kg N h a-l and no seedlings were emerged at the higher levels, in MS S10 plots higher than 80% at all the N levels, and decreased with the N levels from 70.0% at 40 kg N h a-l to 59.5% at 100kg N h a-l of LCU. Seedling started to wilt at 40 kg N h a-l of MS 10 and 80 and 100 kg N h a-l N of LCU on the 8th day after sowing, while seedling growth was normal at all the levels of MS S10. Field performance of rice was evaluated at the 0, 30, 60, 90, 120kg N h a-l of MS S10 applied in the soil of seedling box and N was not applied in paddy. Grain yield at 90 and 120kg N h a-l of MS S10 was similar to conventional urea split application (120 kg N h a-l ), but significantly higher compared to 30 and 60kg N h a-l of MS S10. Fertilizer N recovery decreased with N levels and the N recovery at 90 kg N h a-l of MS S10 and conventional urea split application were 62.2 % and 44.2%, respectively, with similar grain yield. The optimum level of MS S10 to be applied in seedling box seems to be about 90 kg N h a-l considering grain yield, price of fertilizer, labor applying fertilizer, and fertilizer N recovery.d fertilizer N recovery

조생통일을 공시하여 파종후 3~4시간 태양열을 조사시켜 간역출아시키는 방법에 관한 시험 및 육묘상내의 온도를 달리하여 묘소질에 미치는 영향을 1977년 작물시험장 인공기상실 및 답작포장에서 검토한 결과 1. 간역출아방법은 간역출아기간중의 상토온도가 30℃부터 20℃까지의 범위로 유지된 창고 및 옥외 비닐+거적피복한 처리에서 출아가 균일하였다. 2. 간역출아기간중에 주간 47℃, 야간 12℃로 온도교차가 큰 옥외 비닐만 피복처리한 구에서는 출아상태가 불량하였다. 3. 인공기상실내에시 실시한 육묘상내온도는 육묘기에서 32℃로 출아시킨후 연화기에 주간 25℃, 야간 20℃, 경화기는 주간 20℃, 야간 15℃ 온도처리에서 묘가 강건하였고 묘소질이 양호하였다. 4. 연화기부터 경화기까지 주간 30℃, 야간 15℃의 고온처리구에서는 묘령은 현저히 증가하였으나 과번무상태가 되여 묘소질이 불량하였다. 5. 포장시험에서 실시한 육묘상보온방식에 따른 상내온도는 이중비닐턴넬시와 이중비닐턴넬후 야간거적피복처리구가 관행 비닐턴넬시에 비하여 최저온도가 3~5℃높았으며 묘소질도 양호하였다.

수도기계이앙 육묘에 알맞는 상토의 종류와 상토 pH를 1977년 작물시험장 답작포장과 온실에서 조생통일과 통일을 공시하여 본시험을 실시한 결과 1. 기계이앙 육묘에 알맞는 상토는 식양토인 답토양에다 완숙된 퇴비분말을 2 : 1로 혼합작성한 상토가 투수력과 보수력이 좋아 묘생육및 묘소질이 양호하였다. 2. 상토의 pH에 따른 묘의 생리장해와 묘소질을 보면4∼5에서는 초장이 길고 건물중이 무거웠으며 뜸묘및 입고병 발생이 없어 묘소질이 양호하였다. 3. 상토 pH 6이하에서는 초장이 신장되지 않았고 뜸묘및 묘립고병발생이 심하여 묘소질이 양호하였다. 4. 기계이앙 육묘시 생리장해인 뜸묘와 입고병은 상토 pH가 높은데 기인됨으로 pHwhwjf이 중요함을 인식하였다. 5. 묘립고병및 뜸묘방제는 다찌가렌 분제를 상자당 5g 또는 다찌가렌악제를 1000배액으로 540cc 살포한 구가 무시용구에 비하여 묘립고병 및 뜸묘발생이 현저히 적어 다찌가렌시용 효과가 인정되였다.