• Korean Journal of Medicinal Crop Science
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• v.12 no.6
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• pp.437-441
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• 2004

These studies were conducted to investigate the proper method of nitrogen application for increasing the growth stability and quality in ballon flower (Platycodon grandiflorum A. DC.). In growth characteristics by split ratio of nitrogen application, stem diameter, number of branching roots and number of leaves were higher at the split ratio of 50:50 (nitrogen were splitted a half with basal application and the other half in autumn) than at 70:30. Root length, root diameter and number of branching root were higher at 50:50 than those of 70:30. The root yield was increased by 30% (230 kg/10a) at 50:50 compared with that of the 70:30. The crude saponin contents of root from 50:50 was 4.68%.

• Korean Journal of Soil Science and Fertilizer
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• v.35 no.5
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• pp.272-279
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• 2002

A field experiment was conducted to investigate the effect of N-use efficiency and rice yield by rapeseed cake(organic fertilizer) application at panicle initiation stage in machine transplating cultivation from 1999 to 2000. The rice yield increased by 4% in "50% rapeseed cake application", by 2% in "30% rapeseed cake application" at panicle initiation stage, respectively. Amount of fertilizer N uptake was high according to increasing amount of rapeseed cake application at panicle initiation stage compared with conventional treatment, but percentage recovery of fertilizer N was higher in 30% rapeseed cake application than in 50% rapeseed cake application at panicle initiation stage. Thus, this result was thought that there was more adventageous in 30% rapeseed cake application than 50% rapeseed cake application at panicle initiation stage in the fertilizer reduction or N-use efficiency respects in rice paddy.

• Korean Journal of Soil Science and Fertilizer
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• v.29 no.3
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• pp.270-274
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• 1996

To estimate the suitable method of phosphorus application in puddled-soil drill seeding of rice, available phosphorus, appearance of algal water bloom, and rice yield were investigated in paddy soil of Honam area from 1994 to 1995. Available phosphorus content with different regions was the highest in the east-west inland region of Noryeong mountain range and the inland region of Honam area and it was the lowest in the Charyeong south plains region. Available phosphorus content was the highest in the alluvial plains. and it was the lowest in dilluvial terrace. Frations of phosphorus in Jeonbug series were high in the order of Ca-P, Fe-P, and Al-P, respectively. Algal water bloom occurred highly in 100% and 70% basal applications before seeding, and slightly in no-fertilizer and 100% application of 3-leaf stage in puddled-soil drill seeding of rice. Suitable amount of phosphorus application was 21kg/ha in the single cropping paddy field of Fluvio-marine plain, and rice yield was increased 6% at 50% basal application.

• Korean Journal of Soil Science and Fertilizer
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• v.43 no.4
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• pp.446-452
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• 2010

Five year term study from 2002 to 2006 was carried out to examine the effects of continuous long-term application of swine liquid manure on soil chemical properties including heavy metal contents and yield of tomato (Lycopersicon esculentum) and cucumber (Cucumis sativus L.) in a greenhouse. Treatments were conventional chemical fertilizers and three types of swine slurry; Slurry composting and biofiltration (SCB), Thermophilic aerobic oxidation (TAO), and Bio-mineral water (BMW). Total nitrogen level of the SCB, TAO, and BMW was 0.47%, 0.09%, and less than 0.01%, respectively. The heavy metal contents of the three liquid manures were much lower than the Korean regulation level. The soil phosphorus, potassium, and heavy metal contents after five year continuous application of swine slurry were not significantly higher than those of chemical fertilizer use. Contents of heavy metals in leaves of the crops did not show significant difference among treatments. The levels of copper and zinc, plant essential elements, in leaves were in the range of optimum plant growth. Yields of tomato and cucumber for swine liquid manures were not significantly different from that of chemical fertilizer. The results implied that the three types of swine slurry may not deteriorate soil chemical properties including phosphate and trace elements in greenhouse soils when they are applied as a basal fertilization at a recommended nitrogen rate based on soil testing.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.10a
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• pp.58-58
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• 2018

본 연구는 관상식물인 갯까치수염의 분화용 재배기술을 개발하기 위하여 실시하였다. 종자를 이용하여 육묘된 유묘를 사용하여 분화용 포트의 크기, 상토 혼합조성, 기비처리, 유묘의 소질 등의 이식조건과 추비농도, 차광정도, 왜화제 및 적심처리 등의 재배, 관리조건에 대한 생육효과를 2017년 7월 31일부터 10월 9일까지 약 10주간 조사하였다. 갯까치수염의 분화용 재배를 위해서, 피트모스:펄라이트(3:1) 혼합 용토에 $300-200-200mg{\cdot}L^{-1}$(N-P-K)의 비료분을 첨가한 토양을 이색칼라 10호 화분에 충진하여 코트비료 10알을 기비로 시비하고, 200구 트레이에 셀당 2립씩 파종된 묘를 이식묘로 사용하는 것이 갯까치수염의 생육에 가장 효과적이었다. 재배 및 관리방법으로는 차광처리는 하지 않고 재배하는 것이 생육에 좋으며, $250mg{\cdot}L^{-1}$ hyponex를 추비하고 왜화제로 $500mg{\cdot}L^{-1}$ daminozide를 처리하는 것이 갯까치수염의 분화재배에 적합하였다. 또한, 재배기간이 10주 정도일 때는 적심을 하지 않는 것이 분화용 생산에 효과적일 것으로 판단되었다. 본 연구 결과는 다양한 활용성을 가진 야생 초화류의 이용성 및 부가가치 향상을 위한 대량생산 방법의 기초자료로 활용될 수 있을 것으로 생각된다.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.10a
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• pp.59-59
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• 2018

갯까치수염은 앵초목 앵초과의 두해살이풀로 지상부가 고사하지 않고, 월동 후 봄까지 뚜렷한 윤기가 흐르는 잎을 가지며, 7~8월에 흰색 꽃이 피는 관상성이 뛰어난 우리나라의 자원식물이다. 이에 신 관상소재로서의 품목개발을 위해 관상 및 조경산업용 가치가 큰 갯까치수염의 지피용 작물로서의 재배효과를 확인하기 위하여 2017년 7월 31일부터 10월 9일까지 약10주간 실험하였다. 이식묘의 소질별 생육효과, 기비의 시비와 혼합상토의 조성 및 포트의 크기 등의 이식조건, 차광처리 및 추비시비 등 재배관리에 대한 효과를 조사하였다. 종자로 육묘한 이식묘의 소질로서는 200구 트레이에서 한 cell 당 2립씩 파종된 유묘가 지피용 갯까치수염의 재배에 적합하였다. 이식조건으로 코트비료의 기비는 하지 않고, 마사토:피트모스(3:1) 혼합 용토에 $300-200-200mg{\cdot}L^{-1}$(N-P-K)의 비료분을 첨가한 토양을 충진한 4인치 포트에 이식하는 것이 생육에 가장 효과적이었다. 재배관리에는 차광처리를 하지 않고 배치하는 것이 50 및 70% 차광처리보다 초장, 엽수, 엽면적, 생체중 및 건물중 등 생육에 효과적이었다. 또한, $500mg{\cdot}L^{-1}$ hyponex 추비처리를 한 것의 엽수가 36매로 다른 처리의 15~26매 보다 많았지만, 엽면적 및 생체중을 고려할 때 지피식물로서 10주간의 재배를 위해서는 추비하지 않는 것이 적합할 것으로 생각된다.

• Korean Journal of Soil Science and Fertilizer
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• v.7 no.2
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• pp.107-112
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• 1974

In order to establish a rational application method of potash to paddy rice(Oryza sativa L. Jinheung, a Japonica variety) field and pot experiments on split application of two rates (6kg and 12kg $K_2O$ per 10a) of potash at a certain critical growing stage have conducted in 1973 and the results were as follows: 1. At the treatment where a rate of 6kg $K_2O$ per 10a(lower dose) of potash was supplied in two split doses, a half at transplanting time and the other half at young panicle formation stage, the yield of paddy rice appeatred to be low due to less number of panicles per hill. (Field experiment) 2. The treatment where potash supply ceased at transplanting time or at effective tillering stage but supplied at the other two stages (including panicle initiation stage) have failed to increase K content in the flag leaf and have shown low maturity and low thousand grain weight, which resulted in low paddy rice yield. (pot experiment) 3. From above two facts, it is concluded that the application of potash at transplanting time is an important practice for the high yielding of paddy rice. 4. The application of lime seemed to stimulate later growth of paddy depressing the unnecessary increase of poor miserable tillers in early stages of growth.

• FLOWER RESEARCH JOURNAL
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• v.16 no.3
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• pp.222-227
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• 2008

Objective of this Research was to determine the influence of foliar application of $CaCl_2$ or $K_2SI_2O_5$ and soil application of $CaCO_3$ or $SiO_2$ on growth and cut flower quality of Zantedeschia aethiopica 'Wedding March'. To achieve this, $CaCl_2$ or $K_2SI_2O_5$ were applied at six leaf stage with the concentration of 0.05, 0.1 and 0.2% and $CaCO_3$ or $SiO_2$ were applied as basal fertilization with the amount of 100, 200, 400kg per 10a or 50, 100, 200, 400kg per 10a respectively. Plant material was used Zantedeschia aethiopica 'Wedding March'. Among calcium chloride($CaCl_2$) and calcium carbonate($CaCO_3$), calcium chloride foliar application was more effective than calcium carbonate with basal fertilization to growth of common calla 'Wedding March'. In the 0.1% solution foliar application of calcium chloride, plant height, leaf length and length of cut-flower was more longer than control. Length of leaf petiole was more longer and leaf fresh weight was more heavier than control. The degree of petiole hardness was more effective in the 0.1% solution calcium chloride foliar application than any other treatment. In the silicate fertilization treatment, plant height of 50kg per 10a treatment was most highest as 73.9cm. also its length of leaf petiole and leaf fresh weight was more effective than any other treatment. The hardness of petiole was better in the 50kg per 10a silicate fertilizer treatment. The cell shape of leaf petiole was round and tissue was regular in the treatment of 0.1% calcium chloride and 50kg per 10a silicate fertilizer but the cell of control was irregular round type. Macro element content of calcium was more amount in the treatment of silicate 50kg per 10a basal fertilization. The infected ratio of Erwinia was no relation with lime and silicate fertilizer treatment. Lime fertilizer treatment is effective for growth and flowering of Calla than silicate fertilizer and the suitable concentration was 0.1%.

• Korean Journal of Soil Science and Fertilizer
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• v.8 no.4
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• pp.177-181
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• 1975

The pot experiment was conducted primarily to clarify the relationship between lime application and they amount of potassium for the basal and top dressings on paddy rice. (Orizae sativa L. cultivar; variety Jinheung) The soils mixed with lime and without lime were separately filled in to 0.2827 a. open-bottom concretepots. The soil with lime was treated with slaked lime, at two weeks before transplanting to correct soil pH. around 7.0. The total amount of potassium 12 kilograms per 10a was applied by two or three split doses during transplanting, 19 days after transplanting and primodial stages. The results of experiment obtained are summarized as follows: 1. The application of potash in the rate of 4kg per 10a or less for basal dressing and the remaining amount of potash for top dressing at 19 days after transplanting and primodial stage or one top dressing, at primodial stage have increased the yield of paddy with increased number of panicles per hill, milliequivalent ratio of $K^-/Ca^{++}+Mg^{++}$ in leaves in the later stage of growth, number of ripened grains per panicle, and rate of grain maturity. 2. On the other hand, the greater the amount of potassium given for the basal dressing (over 4kilograms per 10a), the smaller number of tillers and panicles were resulted. And the tendency was considered chiefly due to high salt concentration at the early stage of rice growth.

• Korean Journal of Soil Science and Fertilizer
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• v.4 no.1
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• pp.27-32
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• 1971

In 1969, a pot experiment with four replications of 10 treatments including control(without potash) was carried out in order to study the effect of potash top-dressings in the condition of heavy nitrogen application on rice. The results obtained may be summarized as follows. 1. When potash was applied 70% as basic dressing and 30% as top-dressing at ear-formation stage, a considerable increase of the yield of paddy was obtained as compared to the treatment of the whole amount of potash as basic dressing. 2. The antagonism phenomenon of $K_2O$ contents with N contents in the plants appeared to be severe at the maximum reduction division stage and ear-formation stage is next. 3. $K_2O/N$ ratio gave a positive correlation with the yield components before heading and specially, $K_2O/N$ ratio at heading stage was considerably correlated with ripening percentage.