• 한국잡초학회지
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• 제32권3호
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• pp.230-239
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• 2012

Coconut (Cocos nucifera L) is one of the predominant plantation crops in Sri Lankan economy which is known to have existed for over thousands of years. During the past decades coconut production had been reduced by a significant quantity. The usage of poor quality planting materials is a major reason for the low coconut production. Thus much attention needs to be paid in coconut nurseries. Weed management is a critical management practice in the nursery. Though glyphosate application is becoming popular in nurseries it can affect weeds as well as coconut seedlings growth. Therefore the effects of glyphosate were evaluated by determining the growth of shoot and root of coconut seedlings. Poly bag nursery was prepared and three treatments were used. Treatments were no glyphosate and manual weeding ($T_1$), application of glyphosate 1.08 ai kg $ha^{-1}$ at 2 monthly interval ($T_2$) and application of glyphosate 1.44 ai kg $ha^{-1}$ at 2 monthly interval ($T_3$). Application of glyphosate at early stage of seedling growth had a no significant effect on growth parameters tested. However, the concentrations of glyphosate negatively affected numbers, volumes and dry weights of secondary, tertiary and quaternary roots at the latter stage of seedling growth. The leaf area and the height of seedling were significantly reduced by the highest concentration of glyphosate. Among the growth parameters tested, seedling girth and shoot dry weight were not affected by the application of glyphosate. These results revealed that the usage of glyphosate at both concentrations negatively affected root growth of coconut seedlings. Based on these results, the both concentration levels of glyphosate should be applied to coconut nurseries before sprouting the seed nuts.

• 한국식물병리학회지
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• 제11권1호
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• pp.94-97
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• 1995

In 1994, an abnormal rice growth was observed in a 0.5-ha scale farmer's field located at Chogye-Myeon, Hapcheon-Gun, Gyeongnam Province where rice cv. Hwayeongbyeo was seeded directly in dry paddy field conditions. The major symptoms were less stands per acreage, short leaf length, and hypertrophy of root tip portion. The disorder was identified as rice seeding bight caused by Rhizopus sp. The average plant stand per m2 in the infested field was 108, while it was 375 in the normal field, and leaf growth was retarded to less than one-third of healthy plant. The average leaf lengths of infected and healthy seedlings were 12.8cm and 38.9cm, respectively. When the infected seedlings were transplanted to pots, flooded-soil conditions developed no new root growth but upland conditions allowed 11.2 new roots emerging. The length of newly emerged root in infested soil was 5.3cm in upland and 7.1cm in intermediate flooding conditions. However, it was 10.9cm in non-infested soil with intermediate flooding conditions. When the plants were matured, the stem length of infected plants was reduced slightly as compared to normal plants, whereas the length of panicle was not significantly different between infected and healthy plants. The number of panicle per plant, however, greatly different with variation of infection degree. Grain quality such as the number of complete and incomplete grains per panicle, the complete grain weight per panicle, and the weight of 1000 grains was not significantly different.

• 한국약용작물학회지
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• 제19권4호
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• pp.227-232
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• 2011

The roots of Platycodon grandiflorum has been widely used as a crude drug or a food stuff. Unfortunately, the output and the quality is not regular and highly dependent on the cultivation area and cultivation method. Therefore, seedling cultivation study of this plant under structure with various fertilizer supply was performed. As a result, significant big difference between ammonia nitrogen and nitrate nitrogen content was shown in the root at seedling stage while the difference was not significant in the aerial parts. Fresh weight of the root (7.73 g plant$^{-1}$) was higher in the group treated with three major nutrients (N, P and K) than in those treated with three major nutrients and calcium or magnesium or both calcium and magnesium, and non-treated group (2.69 g plant$^{-1}$). Total nitrogen content was recognized to be significantly correlated with root weight, plant height, number of leaves and weight of aerial parts. Ammonium nitrogen content was more correlated the growth of P. grandiflorum than nitrate nitrogen. For phosphoric acid, significant correlation was also shown with the four growth factors.

• 한국약용작물학회지
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• 제25권4호
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• pp.238-243
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• 2017

Background: The production method of ginseng seedlings for ginseng cultivation is very important to ensure healthy rooting system as well as high quality, and yield of the resultant plants. This study was carried out to compare the growth characteristics of 2-year-old ginseng plants that were produced from seedlings grown in self soil nursery (SSN), nursery soil (NS) or hydroponic culture (HC). Methods and Results: The shading prop used was composed of four-layered 4 polyethylene (blue 3 + black 1) shade screen. The management of main field was done by inserting oil cake (1,200 kg/10 a) and then allowing Sudan grass to grow for a year. Seedling transplantation was carried out on April 6. Root growth was measured on October 25. Root weight was observed to be excellent at 6.0 g, following SSN transplantation. Root length was 21.2 cm for HC seedlings, but these plants had a physiological disorder (i.e., rusty root), in 83.5% plants of this treatment. The ratio of PD/PT (protopanaxadiol saponins / protopanaxatriol saponins) was higher in NS seedlings. Plant analysis revealed that Fe content was lower in HC seedlings with high rustiness. The growth of 2-years-old ginseng was different following these varying seedling cultivation methods, but seedlings from NS were not different from those grown in SSN. Conclusions: For the propagation of 2-year-old ginseng plants, NS seedlings may be a good substitute for SSN seedlings.

• 한국포장학회지
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• 제27권3호
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• pp.181-186
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• 2021

결구상추의 수확후 물올림을 위한 처리를 위해서 육묘 시에 부직포 포트를 이용하여, 저장 시 선도 유지 효과를 검토하였다. 결구상추 육묘 시 프러그 트레이와 부직포 포트를 사용한 결과 수확 시 생육에 차이가 보이지 않았다. 따라서 부직포 포트를 이용한 육묘 방법이 포장 및 저장 방법 개선을 위한 물올림 처리에 이용할 수 있는 것으로 판단되었다. 수확후 결구상추의 경정(줄기)을 부직포로 감아 물올림을 실시한 후 포장하여 저장하면, 무포장은 생체중이 감소하는데 비해 물올림 처리는 저장 28일에 1.7%까지 증가하였다. 그 외 엽록소(SPAD), 색도(hue angle)에서 물올림 처리의 측정치가 무처리 보다 높은 결과를 보였다. 따라서 결구상추의 선도유지를 위한 효과적인 저장방법으로 물올림 처리가 효과적인 것으로 보이며, 물올림을 위한 포장의 편이를 위하여 육묘 방법의 개량 가능성을 확인하였다. 앞으로 다른 원예작물에서도 저장 후 선도를 개선하기 위해서는 재배에서부터 수확후 품질에 중점을 둔 추후의 연구가 더 필요할 것으로 사료된다.

• 현장농수산연구지
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• 제19권1호
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• pp.109-117
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• 2017

아직까지 많이 알려지지 않은 마이크로버블을 사용하여 우리나라 대표 작물인 인삼재배에 적용하였다. 고년근에 적용하여 결과를 확인하기 위해서는 비용과 시간 소요가 많아 종묘삼을 활용하여 생리적 변화를 측정하고 분석하였다. 최근 뿌리 작물에 기능성이 있다는 산소수 일반 재배농가에서 사용해보았지만 그 결과가 미미하고 오히려 해를 입는 경우도 생기게 되었다. 다른 작물의 선행결과와 본 연구결과를 볼 때 마이크로 버블을 사용한 인삼재배는 파급효과 있을 것으로 사료된다. 중화제 및 약제를 활용하여 만든 산소수와는 다른 개념으로 마이크로 버블은 공급 장치를 통해 우리가 이용하는 공기를 아주 작은 버블로 압축하여 인삼에 제공함으로써 저해 없이 특이성 성장을 이끌어 내었다. 연구결과로부터 설정된 종묘삼의 생장 특성 및 세분화별 적정범위 및 적정치를 결과와 비교하면, 그동안 이루어졌던 관행농법에서 사용되는 일반수와 마이크로 버블(Micro bubble)수를 사용하여 재배한 결과는 10%에서 15%의 인삼생장을 나타내었다. 이후로 마이크로 버블수를 생산할 때 시간별 용존 산소량을 측정하여 마이크로 발생장치의 최적 시간을 설정하고 최적화 설정을 위해서는 관계시간과 에너지 효율 및 토양의 영양환경에 대한 변화에 대해서도 더욱 많은 연구가 필요하고 사료되며, 더불어 생체 및 중량이 증가된 만큼 인삼의 주요 성분인 진세노사이드의 증감에 대한 분석 등 추가 연구가 활발하게 이루어져야 할 것이다.

• 농업과학연구
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• 제46권4호
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• pp.781-790
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• 2019

Changes in the physical and chemical properties of soil materials during the nursing process have a great influence on the quality of containerized seedlings and on growth and survival after planting. In this study, the effect of biomaterials and their mixed ratios on the growth of Zelkova serrata seedlings in a containerized seedling production system was investigated. Mushroom sawdust, pine bark, and carbonized rice husk were used as biomaterials. The mixed ratios were 10% and 20% volume ratio of the growing medium volume, including the untreated controls. There was no significant difference in the height growth of the Zelkova serrata seedlings according to the biomaterials. The root collar diameter was the highest with the 20% carbonized rice husk and the lowest with the mushroom sawdust. The difference between the highest quality index and the lowest quality index was 30% in the order of the carbonized rice husk, pine bark, control, and mushroom sawdust, but there was no statistical significance. In this study, if the growing medium mixed with biomaterials does not reduce the seedling growth compared with the control, it is considered that the biomaterial can replace a part of the growing media. Therefore, the results show that some of the growing media can be replaced with carbonized rice husk or pine bark when producing Zelkova serrata seedlings.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.322-322
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• 2022

Hay and haylage as forage are increasing in preference for cattle feed. Triticale (X Triticosecale Wittmack) is growing up as a forage crop due to its high production and feed value in South Korea. It is difficult to determine the harvesting stage of triticale for producing hay or haylage with the highest forage value and quality because feed and nutritional value by growth stages of triticale were not known in South Korea yet. In this study, we analyzed forage values, pH, and contents of organic acid, to confirm feed value and quality by growth stages of triticale. The triticale 'Joseong' was sown in the spring of 2022. The sample was prepared in 5 stages: seedling stage, booting stage, heading stage, 10 days after heading, and 20 days after heading. The triticale was dried under 10% and to about 50% moisture for hay and haylage respectively, and then both triticales were fermented anaerobically at room temperature for 40 days. The pH value in all hay and haylage became lower as the triticale was grown up, although the pH value of all triticale hays and haylages ranged between 7.05-5.68. The content of lactic acid in all triticale hays was almost meaningless. The contents in the haylage of the seedling stage were the highest (2.39%) among the haylages, even though those of 20 days after the heading stage (1.67%) were the lowest, which showed a similar tendency with pH value. Conclusionally, the results implied that the feed value and quality of triticale haylage were affected by harvesting time but not hay.

• 생물환경조절학회지
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• 제27권4호
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• pp.381-390
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• 2018

본 실험은 기존의 플러그 육묘 시스템과 원통형 종이 포트 시스템을 상호비교하여 주요 과채류 육묘의 생육 특성을 검토 하기 위해 수행되었다. 초장, 엽면적, 경경, 생체중 등의 지상부 생육은 토마토, 오이, 수박 모두 원통형 종이포트와 플러그 트레이 간의 차이가 없었다. 총 근장은 토마토와 오이는 육묘초기, 수박은 전 기간동안 플러그 트레이가 원통형 종이포트에 비해 길었다. 뿌리의 직경별로 각 뿌리의 길이를 구분한 결과, 토마토는 시험구간 차이가 없었지만 오이와 수박은 모든 굵기의 뿌리에서 플러그가 종이포트에 비해 20~251% 길었다. 토마토 뿌리의 생체중은 육묘기는 플러그 트레이가 원통형 종이포트에 약 30% 무거웠지만 생육이 진전될수록 차이가 감소하였고, 정식 이후는 시험구간 차이가 없어졌다. 오이 뿌리의 생체중은 육묘기부터 정식 이후까지 플러그묘가 약 20~30% 무거웠고, 정식 이후 까지도 생육이 진전될수록 차이가 커지는 경향을 보였다. 수박은 육묘기부터 정식 7일후까지는 원통형 종이포트 묘의 지상부 생체중 및 건물중이 무거웠지만, 정식 7일 이후부터 역전되었다. 결론적으로 원통형 종이포트 묘와 플러그 트레이 묘의 지상부 생육은 전반적으로 차이가 없었고, 지하부 생육은 플러그묘의 생육량이 많았다.

• 현장농수산연구지
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• 제7권1호
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• pp.35-46
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• 2005

규산질비료이용 복토직파재배 개선을 위한 폿트시험 연구에서 얻어진 결과를 요약하면 다음과 같다. 본 연구에서 복토재료에 따른 초기 입모율차이는 무복토 55.0%에 비하여 복토처리로 90~100%의 높은 입모율을 보였다. 특히 파종직후 강우조건에서는 무복토 0%의 출아를 보인반면 복토처리에서는 65~100%의 입모율을 보였으며 강우 시에는 무복토 조건에서도 85%의 비교적 높은 입모율을 보였다. 특히 토양을 이용한 복토처리구에서는 강우로 인하여 20%의 매우 낮은 입모율을 보였는데 이는 수분에 의한 토양층 형성으로 산소공급 및 유모출아 조건이 불량하여 입모율이 극히 저조한 것으로 나타났다. 출수기 벼 생육은 무복토(비강우)처리구를 제외한 모든 처리구에서 비교적 양호한 벼 생육을 보였다. 벼 수량은 초기 입모 및 중간생육이 불량한 무복토(비강우) 및 토양 복토구(강우)에서 낮은 수량성을 각각 보였다.