With medical use of hemp, many medicinal cultivars were bred worldwide. Propagating cultivar using seed has a high cost. On the other hand, vegetatively propagating cultivar has various merits including short breeding period and uniformity. This study aimed to determine optimal conditions for propagating hemp after cutting, including sterilizing of rooting media, rooting hormone, and mixing ratio of growing media and sand of rooting media. Korean landrace strain of hemp plant was grown in Wagner pot (size: 1/2,000 a) for 60 days. Its branches were cut to 70∼80 mm in length and used for cutting slips. The rooting medium, a horticultural nursery medium, was autoclaved for 3 hours at 120 ℃. The mixing ratio of sand and nursery media was 9:1, 7:3, 5:5, or 3:7 in weight. Cutting slips were coated with rooting hormone (1-naphthylacetamide 0.4%) just before planting. Cutting materials were planted in a tray pot of 72 cells and grown in a walk-in-chamber for 28 days with a temperature of 25 ℃ and an intensity of radiation of 800 μmol/㎡/sec. Seedling rates were 61.1%, 77.8%, and 63.0% for mixing ratios of 1:9, 3:7, and 5:5 of sand mixed with horticultural nursery medium. These seedling rates were significantly higher than a seedling rate of 31.5 % for a mixing ratio of 7:3. Root lengths were 97 mm, 91 mm, and 81 mm for mixing ratios of 1:9, 3:7, and 5:5 of sand mixed with horticultural nursery medium. These root lengths were significantly longer than a root length of 37 mm for a mixing ratio of 7:3. Rooting rates were 81.1 % and 91.2 % for slips coated with rooting hormone and sterilized rooting media, respectively. They were 40.0 % and 18.3 % for slips not coated with rooting hormone or sterilized rooting media, respectively. Thus, for vegetative propagating (cutting) of medicinal hemp, sterilizing of rooting media and coating slips with rooting hormone will be essential to conducting the propagation process.

This study was aimed to determine the effects of grow media on the mineral contents of the leaves and growth characteristics of strawberry grown under aquaponics system in a plant factory. For aquaculture, 12 fish (Cyprinus carpio) (total weight, 2.0 kg) were raised in an aquaponics tank (W 0.7 m × L 1.5 m × H 0.45 m, 472.5 L) filled with 367.5 L of water at a density of 5.44 kg·m-3 and total 34 of strawberry seedlings were transplanted in the pots filed with 200 g of orchid stone, hydroball or polyurethane sponge in the growing bed (W 0.7 m × L 1.5 m × H 0.22 m) laid out with holly acrylic sheet (140×60 mm, Ø80) on the top of the system. The pH and EC of the aquaponic solution was ranged from 7.6 to 4.9 and 0.24－0.91 dS·m-1, respectively. The concentration of NO3-N was about 28% lower than that of the hydroponic standard solution, and K, Fe and B were 10, 27 and 3.8 times lower, respectively; however, the mineral contents of strawberry leaves were in the appropriate ranges with lower contents in the leaves grown with sponge media. The organic content (OM), nitrogen (N), phosphorus (P), and potassium (K) of the sludge were 61.5, 5.72, 8.92, and 0.24%, respectively. The leaf area, leaf number, and dry and fresh weights of shoot at 81 DAT were significantly higher in the hydroball, and the average number of fruits per plant was significantly higher in both the orchid stone and hydroball. There was no significant difference in the fresh and dry weights of fruits. Integrated all the results suggest that the orchid stone and hydroball media are more effective to utilize nutrients in solid particles of aquaponic solution, compared to the polyurethane sponge.

The road slopes have various problems such as the risk of landslides and soil erosion, and research on stabilizing road slopes using plant greening has attracted the most attention. The overall objective of this research was to evaluate the effects of woody biomass based growing media on plant germination in a slope area. Moreover, we tried to find out what physicochemical properties of growing media affect plant germination on a slope. For experiment, we tested soil, soil mixed with growing media (1:1, w/w), and growing media by itself. Physical and chemical properties were evaluated after a month from the date of treatment application to the experimental slope site. Plant germination of Lespedeza cyrtobotrya was measured for plant growth evaluation. Physicochemical properties were altered by mixing the soil with growing media. Particularly, moisture content, organic matter and C/N ratio were significantly changed in soils mixed with growing media compared to soil alone. We confirmed that plant germination was high when growing media was mixed with the soil. There was a significant linear relationship between particle density and pH of all media tested and plant germination. In addition, in the same trend, the principal component analysis confirmed that the particle density and pH was positive component for plant germination rate, and the C/N ratio was found to be the negative component for plant germination. In conclusion, the particle density, pH and C/N ratio of the soil mixed with growing media was considered effective for plant germination in the experimental slope site, and this wood-based growing media provides a means to improve the harmony between the slope and the surrounding environment.

The efficacy of the natural amendments in improving physical condition as well as waterretention characteristics of the growing media in pot culture was studied on seven different mixratio of growing media applied to soil. Growing media was prepared from peat, perlite, pruningwaste, pulp(3:1:3:3(w/w/w/w)). Growth substrates were prepared by mixing growing media at therates of 0%, 10%, 20%, 30%, 40%, 50% and 100% with soil at 100%, 90%, 80%, 70%, 60%,50% and 0%, respectively. The bulk density tended to decreased with increasing growing mediaproportions. The particle density was lowest(0.6 g/cm3) in sole growing media treatment and theporosity of all the soil mixed growing media(63.2~83.3%) was significantly higher than that ofthe soil as sole medium(60.7%). The water content was lowest in sole soil treatment(5.1%) andgrowing media as sole medium(57.8%) was the closely ideal range for pot culture(>60%). Although substrates were varying water to the atmosphere at similar rates which retained waterfor longer, growing media as sole still remain constant on high water content. It was confirmedthat strongly correlated between bulk density and water retentivity(correlation-0.85).

This experiment was designed to assess the physical and chemical properties of growing media substituted with a range of increasing concentrations of pretreated wood and to relate these properties to plant growth responses. For preparing the growing media, each material was combined with rural soil, peat, perlite and pretreated wood. Physicochemical properties studied were similar to ideal substrate ranges for plant growth on growing media, including pretreated wood. Physical properties were also well maintained over time. In comparison to plants growing in 100% rural soil, tall fescue(Festuca arundinacea) in the prepared growing media achieved better growth, especially when using the 50% rural soil + 50% PPW(peat + perlite + pretreated wood, 3:1:6(w/w/w)) and 30% rural soil + 70% PPW (peat + perlite + pretreated wood, 3:1:6(w/w/w)), and showed improved germination percentage. We confirmed the potential use of growing media, including pretreated wood. Furthermore, our results show a correlation among the physicochemical properties of tall fescue(Festuca arundinacea); physical properties were significantly influenced by germination and aerial parts. The root length of physicochemical properties was correlated with bulk density and organic compound (p<0.01).

최근 농가에서 모떼기 작업의 용이성 때문에 널리 이용되는 개량상자를 위한 적정 물관리 방법을 본 연구에서 제시하였다. 개량상자 +중량상토 조합으로 마른 못자리와 물 못자리에서 고랑관개와 상면관개를 하여 시험하였는데 그 결과 못자리 종류에 관계없이 상면관개가 안정적인 물관리 방법으로 선정되 었으며 고랑관개는 안정성이 낮아 배제되었다. 선정된 물관리방법이 경량 상토 및 매트상토에서도 유효한지 확인하기 위해 상면관개를 하여 못자리 별로 중량상토, 경량상토, 매트상토에서의 물관리 시험을 시행하였다. 그 결과 상면관개는 동일 못자리내에서 상토 종류에 관개없이 정상적으로 이앙 가능한 수 준의 모를 얻을 수 있었다. 따라서 개량상자를 이용할 경우 못자리 종류와 상토에 관계없이 상면관개를 해야만 하며 모를 안정적으로 얻기 위해서는 물 수위가 낮아지지 않게 주의해야 한다.

활성탄 혼합비율을 달리하여 육모상토의 이화학성 변화 및 참외묘의 생육에 미치는 효과를 검토하였다. 활성탄의 혼합비율이 많을수록 상토내의 pH는 높아졌으며 육묘기일이 경과될수록 초기에 비해 높아지는 경향으로 활성탄을 20% 혼합한 상토에서의 pH는 5.2~5.8로 참외생육에 적합한 pH가 유지되었다. 무기성분 또한 활성탄의 혼합비율에 의하여 성분에 차이가 있었으며 육모기간이 경과함에 따라 낮아지는 경향으로 Ca는 5.4~6.5cmol+ · kg-1 Mg는 7.6~12.3cmol+ · kg-1, K는 37.8~55.3cmol+ · kg-1이었다. 참외묘의 생육 또한 활성탄의 혼합비율에 의하여 차이를 보였는데, 활성탄을 20% 혼합한 상토의 참외묘는 엽장, 엽폭, 초장, 엽면적에서 생육이 좋았다. 상토에 활성탄을 혼합하는 비율에 따라 용적밀도, 수분보유력, pH, 무기성분 등의 함량에 변화가 있었으며, 생육에도 차이가 있었다.

본 실험은 유기물 대체재료로서 peatmoss(원예용 배양토)의 물리, 화학적 특성을 조사하고, 배양상 종류와 관수방법이 고추묘의 생육에 미치는 영향을 보고자 실시하였으며 그 결과는 다음과 같다. 1. Peatmoss에 밭흙을 1:1, 1:2로 배합한 경우에도 고추묘의 생육에 적합한 화학적 성질을 보였다. 2. 고추묘의 발아율은 저면관수보다 철수관수 처리시 월등히 높았으며, peatmoss, TKS 단독 처리구를 제외하고는 배양토 종류간의 차이는 없었다. 3. 전반적으로 철수관수보다 저면관수 처리시 생육이 양호하였으며, 특히 peatmoss와 밭흙을 1:1, 1:2로 배합한 처리구의 생육이 가장 양호하였다.

This study was aimed to determine effects of soil organic amendment as plant growing media component on restoration of planting ground. The changes of soil physical and chemical properties and germination and growth of kentucky bluegrass (Poa pratensis L.) were investigated. For treatments, soil was excavated at depth of 0-50 cm (referred as S1) and at depth of 50-100 cm (referred as S2). Then the half amount of S1 soil was mixed with the soil organic amendment (coir dust 40% (v/v), bottom ash 25%, leaf mold 25%, vermiculite 5%, carbonized rice hull 5%) at a rate of 6% (v/v) (referred as S1CC) and also the half amount of S2 soil was mixed with the soil organic amendment at a rate of 6% (v/v) (referred as S2CC) on pot in a 16 cm diameter and 14 cm height. The experiment was replicated 3 times with 3 pots per replication in randomized block design, and 100 seeds were planted per pot. In results, there was no significant difference in soil pH among the treatments with a slight decrease in soil hydraulic conductivity. However, in the S1CC treatment, positive increases in soil chemical properties, including electrical conductivity, organic matter, phosphoric acid, total nitrogen, exchangeable cation, and cation exchange capacity. Also, the germination rate, plant height, and number of leaves were higher in the S1CC treatment than those in other treatments. These results suggest that the addition of organic amendment to the soil at depth of 0-50 cm might be proper for restoring planting ground.

본 연구는 옥상녹화에서 무기질계 인공토와 유기질계 인공토가 초본인 돌나물과 목본인 순비기나무의 생육에 미치는 영향을 살펴 봄으로써 유기질계 인공토의 효용성을 제시하고자 한다. 연구기간 은 2013년 5월에서 10월로 약 5개월이며, 식물종은 초본류에 돌나 물을, 목본류에 순비기나무를 대상으로 무기질계 인공토(Inorganic substrate=perlite, IOS), 자연토(natural soil, NS), 유기질계 인공 토Ⅰ(organic substrate=artificial compost Ⅰ, OS1), 유기질계 인공토 Ⅱ(organic substrate=artificial compost Ⅱ, OS2)로 구 성하였다. 돌나물의 초장, 줄기수, 엽수, 상대엽록소함량비는 유기 질계 인공토 Ⅰ처리구(OS1)> 자연토 처리구(NS)> 무기질계 인 공토(IOS) 순으로 높았으며, 통계적인 차이가 뚜렷하였다. 생체중 과 건물중 또한 OS1, NS, IOS 처리구 순으로 생육결과와 비교적 유사한 경향을 보였다. 순비기나무는 수고, 경경, 엽장, 엽폭은 유기 질계 인공토 Ⅱ(OS2)> 자연토 처리구(NS)> 무기질계 인공토 (IOS) 순으로 유의적으로 높았으며, 특히 유기질계 인공토 Ⅱ 처리 구에서 단기간의 실험임에도 불구하고 그 차이가 뚜렷했다. 이에 옥상녹화의 식재지반에서 무기질계 인공토의 단용처리는 식물생 육에 부정적인 영향을 미칠 수 있으므로 식물생육을 위한 적정비율 의 유기질계 인공토의 활용이 요구된다.

본 실험은 인공 배지를 사용하여 채소류의 생육반응을 알아보고 EPP소재 화분에 적합한 가볍고, 보수성이 우수한 배지를 선발하기 위하여 실시하였다. 고형율은 배지A가 27.4%였으며 배지B~E는 10% 정도였다. 공극율은 B~E의 경우 90% 정도로 A의 72.6%보다 유의하게 높았다. A의 함수량은 63.6g 이었으나 B~E는 70g 이상으로 유의하게 높았다. B의 pH는 5.6으로 가장 높았으며 그 다음으로 C, D, E 순이었다. EC의 경우 A가 2.16ds/m 으로 가장 높았으며 B~E의 경우 0.43ds/m 이하로 매우 낮았다. 사용한 배지의 물리성은 변하지 않았다. 엔다이브의 엽수는 D, E에서 19.2장으로 가장 많았다. 상추의 엽장과 엽폭은 B~E에서 각각 19cm, 11cm 정도로 배지 간에 차이는 없었으나 배지 A의 14.7cm, 9.1cm보다 유의하게 증가하였다. 엽수와 근장의 경우 유의차는 없었지만 잎의 크기와 마찬가지로 B~E가 A 보다 많은 것으로 나타났다. 머스타드의 엽장은 B~E가 A에 비해 통계적으로 유의하게 큰 것으로 나타났다. 토마토의 초장은 C~E에서 50cm 정도로 A에 비해 유의하게 생장이 증가하였다. 개화일은 D가 7월 28일로 가장 빨랐으며 그 다음이 E로 7월 30일이었다. 과실수는 유의한 차이는 없었으나 E가 8개로 가장 많았다. 이상의 결과로 보아 본 실험에서 조제한 배지는 기존의 원예상토에 비해 가볍고 보수성이 우수하였다. 또한 식물의 생육과 배지의 물리화학적인 특성을 고려할 때 엔다이브, 상추, 머스타드, 토마토의 재배에 적합한 배지는 E(코코피트:피트모스:수태=2:5:3)로 판단되었다.