• 생물환경조절학회지
• /
• 제15권1호
• /
• pp.21-34
• /
• 2006

This research was conducted to determine the plant growth and nutrient contents of potted chrysanthemum 'Lima Honey' as influenced by application rate of fused superphosphate (FSSP) in three root media, peatmoss+vermiculite (1:1, v/v; PV), peatmoss+composted rice hall (1:1, v/v; PR), and peatmoss+composted pine bark (1:1, v/v; PB). All root media contained polyacrylic acid sodium salt at a rate of $4.5g L^{-1}$. The treatment of $1.4g L^{-1}$ in PV and those of $0.7g L^{-1}$ in PR and PB had the greatest fresh and dry weights in each root medium at both 43 and 80 days after transplanting. Elevated application rates of FSPP increased tissue contents of N, P, and K at both 43 and 80 days after transplanting in PV medium. However, the differences in tissue contents of N, P and K in PR medium were less significant among treatments of FSPP. The pre-planting FSPP also less affected the tissue contents of nutrients at 80 days after transplanting as compared to those at 43 days after transplanting. Elevated application rates of FSPP in PV medium increased EC and the concentrations of $NO_3,\;P_2O_5$, K, Ca, and Mg in soil solution of root media at 43 days after transplanting. The EC in PV medium at 80 days after transplanting was higher than that at 43 days after transplanting. The EC in all root media at 80 days after transplanting was not different among treatments of FSPP.

• 한국자원식물학회지
• /
• 제19권1호
• /
• pp.130-132
• /
• 2006

본 실험은 한국잔디의 실생묘 이식재배 시 개간지에서 적정 재식거리를 구명하기 위한 기초 자료를 얻고자 수행하였다. 잔디 실생묘 이식재배시 적정거리를 구명하기 위해 생육특성인 초장, 근장, 분지수, 마디수 및 포복경 길이와 수량구성 요소인 생체중 및 근물중을 조사하였다. 재식거리($30{\times}30cm$)에서, 초장, 근장, 분지수, 마디수 및 포복경 길이가 각각 14.1cm, 22.0cm, 7.0개, 31개 및 77.5cm로, 그리고 생체중 및 건물중이 각각 16.1 and 11.0g/plant로 다른 재식거리와 비교하여 가장 높게 관측되었다. 그러므로 잔디 생육특성과 수량구성 요소를 고려하여, 잔디의 실생묘 이식재배 시 개간지에서 적정 재식거리는 $30{\times}30cm$인 것으로 판단되었다.

• 한국작물학회지
• /
• 제68권1호
• /
• pp.1-7
• /
• 2023

벼 품종별 재식밀도 변경 시 생육특성 변화를 분석한 결과는 다음과 같다. 1. 재식밀도 변경 시 간장, 수장의 변화는 없으며 각 포기 사이의 재식거리가 10 cm 넓어질수록 포기당 분얼수는 평균 4.4개, 이삭당 립수는 평균 7.5개 증가하였다. 2. 기존 80주 이앙 시 분얼수 및 립수가 많은 품종이 재식밀도가 감소되어도 분얼수 및 립수가 많은 경향이었다. 3. 재식밀도 감소 시 분얼수 및 립수 증가비율은 기존 80주 재배 시 품종의 분얼수 및 립수와 유의한 상관관계를 나타내지 않았다. 4. 재식밀도 감소 시 이삭지경의 개수 및 길이가 증가하였으며 이 때문에 이삭당 립수가 증가한 것으로 판단된다.

• 생명과학회지
• /
• 제8권3호
• /
• pp.294-297
• /
• 1998

본 연구는 이식시기와 물관리 방법이 율무의 수량에 미치는 영향을 아아보기 위함이었는데, 그 결과는 아래와 같이 요약된다. 1. 율무의 이식후 초기생육은 배수처리구에서 양호하였고 침수처리구는 이식 1개월 이후부터 생육이 점차 회복되었다. 2. 이식시기가 늦어질수록 이식-출수하까지의 기간이 크게 단축되었으며 율무의 제특성 발현 및 첫서리 이전에 수확을 하기 위해서는 6월 20일이 율무 이식한계기였다. 3. 율무는 침수 재배조건하에서 간장은 단축되었으나 결실립수 및 1,000립중은 증가하였으며, 엽고도 감소되어 배수처리구에 비해 종실수량이 8% 증수되었다.

• Journal of Biosystems Engineering
• /
• 제23권3호
• /
• pp.271-276
• /
• 1998

A gripper mechanical design using a pneumatic system was developed to successfully grip, hold, and release a seedling plug for transplanting it. The gripper comprised of two air cylinders and shovel-type fingers. The gripper can grasp and hold a seedling by sliding the two fingers attached to the two separate air-cylinders, mounted at an angle of 15$^{\circ}$ When releasing a plug, retraction of the fingers gives a seedling little attachment to the gripper. To prevent seedling from attaching to the fingers, press-plates were attached to the end of the gipper. Transplanting performance of the developed gripper was tested with cucumber seedlings at different soil moisture contents. Overall transplanting performance of developed gipper was higher than the performance of the previously developed gripper. Best transplanting result was achieved at medium level of soil moisture content.

• Plant Resources
• /
• 제5권3호
• /
• pp.187-191
• /
• 2002

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.

• 한국자원식물학회지
• /
• 제17권2호
• /
• pp.135-138
• /
• 2004

남부지방에서 답전작 재배로 적합한 이식기를 구명코자 다수성 품종으로 선발된 광산조생 재래종을 공시하여 시험을 수행하였다. 경장, 분얼수는 5월 10일과 5월 20일 이식구에서 가장 우수하였으며 출수된 경수와 경태(장경, 중경, 단경)은 5월 20일 이식구에서 가장 우수하였다. 또한 건피 수량(장경, 중경, 단경)과 건수수량은 5월 20일 이식구에서 가장 우수하였다.

• 한국자원식물학회:학술대회논문집
• /
• 한국자원식물학회 2002년도 심포지엄
• /
• pp.31-36
• /
• 2002

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. In case 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.

• Journal of Ginseng Research
• /
• 제22권4호
• /
• pp.299-303
• /
• 1998

To know possibility of raw ginseng production for white- and red-ginseng by direct-sowing culture, seeds were directly sowed or seedlings were transplanted at soil condition of sandy loam in ginseng field. After cultivation, the characters of 5-year-old ginseng were investigated. Number of survived plants was increased with increase the seeding quantity in direct-sowing culture, the survived plants in direct-sowing culture was higher than that of transplanting one. Rate of the numbers of survived plants to numbers of seeds sowed in plots of 134 or 90 seeds sowed per tan, 180 x 90cm area, inspire of high number of survived plant was high compared to that of transplanting culture. Occurrence rate of rusty root of ginseng in direct-sowing culture was low significantly compared to that of transplanting culture. Root yield showed in the order of 134, 268, 90 seeds sowed, the values of yield in direct-sowing culture were high obviously compared to that of transplanting one. Individual root weight was increased with decrease the seeding quantity, however, the root weight in plot of 90 seeds sowed showed almost equal the weight in transplanting culture. The number of usable raw ginseng for white- and red-ginseng was increased with decrease of the seeding quantity; the numbers were higher than that of transplanting culture remarkably. We concluded that optimum seedling rate in direct-sowing culture of ginseng was 90 to 134 seeds per tan considering the yield per area and production rate of large root.

• 한국정밀공학회지
• /
• 제22권12호
• /
• pp.108-116
• /
• 2005

Transplanting accuracy of a rice transplanter mainly depends on the trajectory of the hoe for picking, conveying and transplanting of seedlings as well as the return motion. The trajectory can be decided and prescribed to be suitable in treating seedlings fur a prevailing soil condition. For the purpose of the transplanting accuracy, the design of a transplanting mechanism would be carried out using a planetary-gear-train system instead of the four bar linkage system. In this study, a design method of transplanting mechanism is theoretically proposed by synthesizing a noncircular planetary-gear-train system fur the tool (hoe) to trace a prescribed trajectory. The method utilizes an optimization approach to decide the lengths of an arm and a tool, the inverse kinematics to figure out the configuration angles of the two links, the roll contact condition in transmitting motion between the gears, and a linearization approach to obtain the shapes of the gears. Based on the proposed method, the shapes of the gears and the lengths of the tools of the planetary-gear-train system are determined fur three prescribed trajectories. A kinematical simulation with a commercialized package program is also carried out to confirm that the gear-train system synthesized with the proposed method is able to trace the prescribed trajectory.