• 한국초지조사료학회지
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• 제15권1호
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• pp.30-36
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• 1995

Pasture composed of about 30% botanical composition of white clover (Trijolium repem L.) is desirable in its productivity and quality. To get information on maintaining its productivity in the pasture, the experiment was canied out to determine the effect of infrequent, frequent defoliation or their alternation on change of its harvest yield and growth. Individual plants of Regal, Louisiana S-1, Grasslands Huia and Aberystwyth S184 were grown in 22cm plastic pot containing a 2 : 1 : 1 soil : sand : Peat moss mixture for 27 days after transplanting 50day seedlings raised on 3cm pots, and then all their fully expanded leaves are removed. Defoliation treatments were forced every 1 (CC, frequent), 4 week (RR, infrequent) or their alternations (CR, RC) after 8 weeks from the removal. To analyze the treatment effects, plants were sampled on 0 (the removal day), 4, 8, 12 and 16 weeks after the removal and seperated to leaves, petioles, stolons and roots. Each harvest yield of infrequent defoliation (RR) was higher than that of frequent defoliation (CC). Their alternations (RC, CR), however, forced fluctuation of the yield according to defoliation interval. Fraction weights from their altemations showed intermediate ones of infrequent and Frequent defoliation whose weights did the similar result to their harvest yields. Fraction and total dry weights per plant, shoot/root ratio were changed by relative span of defoliation interval, which resulted from the weights of leaves and petioles, removed parts. Root and total dry weight per plant of Regal were greater than the other cultivm in infrequent defoliation interval regardless of continuous or alternations. Productivity of white clover in pasture, therefore, can be controlled by alternation of infrequent and frequent defoliation or reverse.

• 생물환경조절학회지
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• 제6권2호
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• pp.92-96
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• 1997

단고추의 장기자루식 양액배지에 있어서 분지수가 생육과 수량에 미치는 영향을 구명하고자 1폿트당 4지, 6지, 8지를 유인하여 재배한 결과를 요약하면 다음과 같다. 1 초장, 경경, 엽중, 근중, 경중은 유의성은 없었으나 엽수와 엽면적은 8지유인에 많았다. 2. 과경, 과중은 4지 유인구에서 많았고 유의성은 없었으나 수량도 124.5ton/ha로 8지 유인의 113.4ton/ha보다 9% 많았다. 3. 유인방법별 월별 수량은 초기 5개월은 8지 유인이 4지 유인보다 많았으나 중기이후인 4월부터 수확 종료까지 4지 유인이 수량이 많았으며 유인에 따른 노동력 절감 및 상품율면에서 자루식 장기재배의 경우 4지 유인이 알맞을 것으로 사료되었다.

• Plant Resources
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• 제8권2호
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• pp.130-134
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• 2005

This study was conducted to evaluate the control effect of fungicides on control of Gray mold, growth characteristics, and root yield in the cultivation of Scutellaria baicalensis after barley cropping. All fungicides treated had no effect on the growth and flowering rate of Scutellaria baicalensis. All seed disinfectants had no effect on the growth and flowering date of Scutellaria baicalensis Georg. The major seed disinfectants were Benomyl Wp, $20\%$, Captan Wp, $50\%$, Hymexazol Ec, $30\%$, Carboxin D, $37.5\%$. Dry root yield were increased largely with Benomyl Wp, $20\%$, seed disinfectant than the other seed disinfectants had no injury with standard dosage. On the other hand, all seed disinfectants had slight injury in the double dosage level for the Scutellaria baicalensis Georg.

• 한국작물학회지
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• 제45권6호
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• pp.387-391
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• 2000

맥류후작 콩 재배시 보릿짚의 시용효과를 구명하기 위하여 보릿짚 시용, 제거 및 소각에 따른 토양 이화학성 및 콩의 생육과 수량에 미치는 영향에 대하여 검토하였던 바를 요약하면 다음과 같다. 1.보릿짚을 시용한 토양의 유기물함량은 보릿짚 제거 및 소각보다 높았으며 수분을 등 물리성의 개선 효과 있었다. 2. 잡초발생은 보릿짚 제거에 비해 보릿짚 시용에서 44%, 소각에서 31% 억제되었다. 3. 근류수 및 근류 건물중은 보릿짚 시용에서 많았다. 4. 식물체 건물중은 보릿짚 시용에서 지상부는 파종 후 30일경까지는 보릿짚 제거에 비해 적었으나, 그 이후단계는 차이가 없었으며, 지하부는 전 생육기간 동안 보릿집 처리 방법에 따른 차이는 없었다. 5.수량은 보릿짚 처리방법에 따른 유의적인 차이는 없었다.

• 생물환경조절학회지
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• 제4권2호
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• pp.152-158
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• 1995

고추의 양액재배에서 근권온도와 양액중 질소형태의 관계를 알아보기 위하여 3수준 (18$^{\circ}C$, 22$^{\circ}C$, 26$^{\circ}C$의 근권온도에서 양액중 질소형태의 비율을 달리하여 (NO$_3$-N/NH$_4$-N = 10:0, 8:2), 고추의 생육, 수량, 광합성속도, 엽록소 함유율 및 근의 활성에 미치는 영향에 대하여 검토하였다. 초장, 엽수, 경경과 엽, 근의 생체중 및 건물중은 근권온도에 의한 영향은 없었으나, NH$_4$-N의 첨가에 의하여 18$^{\circ}C$, 22$^{\circ}C$, $25^{\circ}C$의 모든 근권온도에서 초장, 엽수, 경경과 엽, 근의 생체중 및 건물중은 증가하였다. 고추의 과장은 18$^{\circ}C$와 26$^{\circ}C$의 근권온도에서 NH$_4$-N의 첨가에 의하여 약간 길어지는 경향이었고, 주당 과수 및 수량은 NH$_4$-N의 첨가에 의하여 모든 근권 온도에서 증가하였다. 광합성속도는 근권온도가 높아질수록 저하되었으나, NH$_4$-N의 첨가에 의하여 18$^{\circ}C$, 22$^{\circ}C$, 26$^{\circ}C$의 모든 근권온도에서 유의적으로 높아졌다. 엽록소 상대적함유량은 22$^{\circ}C$의 근권온도에서 높아졌으며, NH$_4$-N의 첨가에 의하여 18$^{\circ}C$, 22$^{\circ}C$, 26$^{\circ}C$의 모든 근권온도에서 높아졌다. 근의 활성은 26$^{\circ}C$의 근권온도에서 높아졌고, NH$_4$-N의 첨가에 의하여 18$^{\circ}C$, 22$^{\circ}C$, 26$^{\circ}C$의 모든 근권온도에서 높아졌다.

• 한국약용작물학회지
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• 제19권2호
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• pp.90-96
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• 2011

This study was conducted to examine major growth responses, the production and partitioning of dry matter on different growth stages, and yields and to select the optimal shading material in both quality and productivity of ginseng. Two cultivars of ginseng, Cheonpoong and Geumpoong, were cultivated in the paddy soil with three different shading materials; three-layered blue and one-layered black polyethylene (TBP), blue polyethylene sheet (BPS), and aluminium-coated polyethylene sheet (APS). Plant heights were linearly increased until June 24 and then maintained with showing higher height in Cheonpoong than that in Geumpoong cultivar. Root lengths were gradually increased until October 16. They were longer in Cheonpoong than that in Geumpoong cultivar, showing slightly longer with APS compared to TBP and BPS. The ability of producing dry matter of leaves was much higher from April to June compared to those of other growth periods, whereas its ability of root was concentrated from the end of June to the end of August. Among the shading materials, the ability of producing dry matter of shoot was higher with TBP than those with BPS and APS, while its ability of root was not appeared certain tendency unlike the shoot. The yield of ginseng roots was the highest with TBP among three shading materials and it was higher in Cheonpoong than that of Geumpoong cultivar. The shading materials which affect the light intensity and the temperature would be considered as an important factor to get better quality and productivity of Korean ginseng.

• 유기물자원화
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• 제2권1호
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• pp.65-73
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• 1994

본 연구는 지렁이 분립의 혼합비율이 고추 플러그묘의 생육에 미치는 효과를 조사하기 위하여 수행되었다. 본 연구에서는 지렁이의 분립은 20,30,40,50%로 투입하고 나머지는 peatmoss와 vermiculite로 보충하여 배합하였다. 얻어진 결과는 다음과 같다. 1. 엽수, 엽면적, 건물수량등에서 차이가 있었으며 (0.1%의 통계적 유리성), 지렁이 분립의 혼합비율에 있어서는 엽수, 엽면적 및 경중에서 1%와 엽중, 근중 및 생물학적 건물수량에서는 5%의 유의성이 인정되었다. 2. 지렁이 분립을 혼합한 상토가 국내 시판중인 상토 보다 조사후기에 접어들수록 많은 엽수와 엽면적의 증거를 나타내었다. 3. 지렁이 분립을 처리한 상토에서 대조구보다 전 육묘기간을 통해 엽중, 경중 및 근중 등이 전반적으로 높았는데, 이러한 경향은 지렁이 분립의 비율이 40% 이상에서 현저하였다. 4. 조사시작 후 3주째까지는 엽중이 경중보다 높았지만 4주째 부터는 경중이 더 높았으며, 또한 육묘후기에는 지렁이 분립을 혼합한 처리에서 대조구 보다 경중이 더 높았다. 5. 생물학적 건물수량은 조사초기에는 처리간 차이가 없었으나 후기에는 지렁이 분립을 혼합한 처리구가 대조구 보다 높았다.

• 한국초지조사료학회지
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• 제17권2호
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• pp.167-176
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• 1997

A field experiment was conducted in Chungiu and Jungwon to evaluate growth characteristics, root development, dry matter yield, crude protein yield and palatability according to nitrogen fertilizer level at intercropping cultivation of sorghum $\times$ sudangrass hybrid(hereinafier referred as SSH) and soybean. Nitrogen level was six treatment of Okg, 30kg 60kg, 90kg 120kg, and 150kg per hectare, and cutting date (sorghum $\times$ sudangrass and soybean) was july 28. 1. In the SSH, plant length was increased with increasing nitrogen fertilizer from 0kg/ha to 120kg/ha, but 150kgha treatment was decreased cornpared to 120kg/ha treatment. In the soybean, plant length did not show difference among 0kg, 30kg 60kg, and 90kg per hectare, but 120kg and 150kgfha treatment was on the contrary short. In the SSH, leaf length, leaf width and leaf number were the highest in 120kg/ha treatment, but soybean showed multifarious. 2. Stem diameter of SSH was increased with increasing nitrogen fertilizer. But soybean was thick from 0kg/ha treatment to 60kg/ha treatment, while above 90kg/ha treatment was on the contrary thin. Stem of SSH was hard with increasing nitrogen fertilizer, but soybean was soft with increasing nitrogen fertilizer. Root weight (Dry matter) of SSH was increased with increasing nitrogen fertilizer. On the contrary, soybean was decreased with increasing nitrogen fertilizer. 3. In the dairy cattle and Korean native cattle, palatability according to nitrogen fertilizer was the highest at 90kgha treatment, while 120kgha treatment and 150kgha treatment was the lowest. But in the deer, 30kg/ha treatment of low nitrogen fertilizer was the highest in palatability. 4. Nitrogen content of root of SSH was increased with increasing nitrogen fertilizer(P<0.01). But in soybean, 30kg and 60kg/ha treatment were higher than 0kg, 90kg, 120kg and 150kg/ha treatment(P<0.01). Total niwogen content of soil were high at 90kg 120kg 150kgha trea~ment(P<0.01). 5. Dry matter yield was high at the 90kg 120kg and 150kgha treatment as range from 15, 262kg/ha to 15, 614kg/ha without significant difference among those, but Okgha treatment was the lowest as 11, 183kg/ha (PC 0.05). Protein content of SSH was the highest at 90kg/ha treatment as 8.3 percentage. Soybean was highest at 60kgha treatment as 22.9 percentage. Protein yield was the highest at 90kg/ha treatment as 1, 547.6kg/ha, but Okgha treatment was the lowest as 1, 022.8kg/ha (P<0.01).

• 한국작물학회지
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• 제66권2호
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• pp.146-154
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• 2021

최근 기상이변으로 인한 일조부족이 문제되어 작물의 수량 감소 피해가 발생하고 있다. 본 연구는 생육시기에 따라 차광량을 달리하여 고구마의 생육양상 및 수량 감소 정도를 구명하고자 수행하였다. 1. 생육시기별 차광률은 55% 차광 처리시 약 51%, 그리고 75% 차광 처리시에는 약 65% 수준의 차광률을 보였다. 차광처리에 의한 광계 II 암적응 최대양자수율(Fv/Fm) 조사 결과는 호감미와 진율미 두 품종 모두 대조구와 55% 차광 시험구는 유의적인 차이를 보이지 않았고 75% 차광 시험구의 경우 대조구 보다 약간 높은 수치를 보였다. 2. 차광 처리 50일 경과 후 처리별 광합성에 이용되는 색소의 함량을 조사하였다. 호감미와 진율미 두 품종 모두 차광처리구의 엽록소 a와 b의 함량이 대조구에 비하여 유의적으로 증가하는 경향을 나타내었다. 특히 엽록소 b의 함량은 더 많은 비율로 증가 하였다. 호감미의 경우 대조구에 비하여 55%와 75% 차광처리구에서 각각 47%, 41% 증가하였고 진율미의 경우는 각각 39%, 34% 엽록소함량이 증가하였다. 3. 괴근형성기(정식 후 50일간)와 생육 중기(정식 후 50~90일 사이)에 차광처리 시 생육특성을 조사하였다. 지상부 및 지하부 건물중 역시 두 품종 모두 대조구에 비하여 차광 처리 시 감소하였다. 특히 괴근 형성기에 두 품종 모두 수량이 감소하였다. T/R율은 차광처리에 의하여 두 품종 모두 증가하는 경향을 나타내었다. 괴근형성기 및 비대기에 일조량이 부족할 경우 두 품종 모두 전반적으로 괴근 형성 및 비대가 억제되는 경향을 보였다. 4. 수확 후 수량 조사 결과 두 품종 모두 생육시기별 차광 처리에 따라 괴근 비대가 저조한 양상을 띠었으며, 특히 호감미가 수량감소폭이 진율미에 비해 상대적으로 크게 나타났다. 또한 차광처리가 높을수록 수확량도 크게 감소되었다. 괴근 형성기와 괴근 비대성기에 비하여 괴근 비대기에 두 품종 모두 수량 감소의 큰 영향을 받았다.

• Journal of Forest and Environmental Science
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• 제36권3호
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• pp.207-218
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• 2020

Ashwagandha is an important ancient medicinal crops, being affected with many diseases, among which leaf blight caused by Alternaria alternata has become the constraint resulting in huge yield losses. Continuous usage of chemical methods leads to environment, soil and water pollution. Whereas biological control of diseases is long lasting, inexpensive, eco-friendly and harmless to target organisms. In this context, it is aimed to evaluate five Trichoderma strains viz. Trichoderma virens IMI-392430, T. pseudokoningii IMI-392431, T. harzianum IMI-392432, T. harzianum IMI-392433 and T. harzianum IMI-392434 as bio-control efficacy against A. alternata and growth promoting effect in Ashwagandha. All the Trichoderma strains had varied antagonistic effects against the pathogen. In dual culture technique, the strain T. harzianum IMI-392433 showed maximum percentage inhibition of mycelial growth (54.89%) followed by T. harzianum IMI-392432 (53.83%), T. harzianum IMI-392434 (48.94%) and T. virens IMI-392430, (43.62%) against the pathogen, while the least inhibition percentage was observed with the T. pseudokoningii IMI-392431 (36.60%). The culture filtrate of the Trichoderma strain, T. harzianum IMI-392433 recorded highest inhibition on the mycelial growth (39.05%) and spore germination (80.77%) of pathogen and the lowest was recorded in T. pseudokoningii IMI-392431 (20.45 and 50%). Moreover, seeds treated with spore suspension of the strain T. harzianum IMI-392433 reduced the percentages of disease severity index significantly. The strain T. harzianum IMI-392433 also significantly increased seed germination %, seedling vigor and growth of Ashwagandha. The correlation matrix showed that root yield per plant of Ashwagandha had significant and positive correlation with plant height (r=0.726^⁎⁎), number of leaf (r=0.514^⁎⁎), number of primary branch (r=0.820^⁎⁎), number of secondary branch (r=0.829^⁎⁎), fresh plant weight (r=0.887^⁎⁎), plant dry weight (r=0.613^⁎⁎), root length (r=0.824^⁎⁎), root diameter (r=0.786^⁎⁎), root dry weight (r=0.739^⁎⁎) and fresh root weight (r=0.731^⁎⁎). The significant and negative correlation (r=-0.336^⁎⁎) was observed with the root yield and percentages of disease severity index. The study recognized that the T. harzianum IMI-392433 strain performed well in inhibiting the mycelial growth and reduced the percentages of disease severity index of pathogen as well as increased the plant growth in Ashwagandha.