• 한국연초학회지
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• 제11권2호
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• pp.115-126
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• 1989

This study was conducted to determine the time and methods of predicting tobacco yield, by studying the relationship of yield components to yield. 1. The relationship between each position in leaf dry weight and approached gradually each other and also correlation coefficient of top leaf was higher than that of lower leaf. The leaf dry weight per plant was highly correlated with leaf area from 16th leaf position on stalk. Leaf dry weight of each leaf position on stalk was highly correlated with leaf dry weight per plant at 14 to 16th leaf position. 2. The correlation coefficient between leaf dry weight and leaf area per plant was higher at the late growth stage than at the early growth stage, and higher between the near stages. Correlation coefficient between leaf dry weights was higher than that of leaf areas. 3. Flue-cured tobacco yield be estimated from leaf dry weight per plant at 50 to 55 days after transplanting. 4. Air-cured tobacco yield could be predicted from leaf dry weight per plant at 60 days after transplanting.

• Plant Breeding and Biotechnology
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• 제5권3호
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• pp.237-242
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• 2017

AT-hook proteins of plant have shown to be involved in growth and development through the modification of chromatin architecture to co-regulate transcription of genes. Recently, many genes encoding AT-hook protein have been identified and their involvement in senescence delay is investigated. In this study, soybean transgenic plants overexpressing chromatin architecture-controlling ATPG7 gene was produced by Agrobacterium-mediated transformation and investigated for the positive effect on the important agronomic traits mainly focusing on yield-related components. A total of 27 transgenic soybean plants were produced from about 400 explants. $T_1$ seeds were harvested from all transgenic plants. In the analysis of genomic DNAs from soybean transformants, ATPG7 and Bar fragments were amplified as expected, 975 bp and 408 bp in size, respectively. And also exact gene expression was confirmed by reverse transcriptase-PCR (RT-PCR) from transgenic line #6, #7 and #8. In a field evaluation of yield components of ATPG7 transgenic plants ($T_3$), higher plant height, more of pod number and greater average total seed weight were observed with statistical significance. The results of this study indicate that the introduction of ATPG7 gene in soybean may have the positive effect on yield components.

• 한국작물학회지
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• 제45권4호
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• pp.237-240
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• 2000

This experiment was conducted to evaluate the effect of split application of nitrogen(N) on development of vascular bundle(VB) and yield components of rice. Two cultivars were used in this study; IR58, an indica type and Shinunbongbyeim a japonica type. The number and total cross sectional area of the VB in the peduncle and leaf blade were more and bigger in N split application than 100 percent basal fertilizer. Nitrogen split application at necknode differentiation stage increased the number and size of the VB. Nitrogen split application resulted in increased panicle number with application of N before transplanting and at tillering stage; increased spikelets number with N application at necknode differentiation stage; and increased spikelet fertility and 1000 grain weight with N application at necknode differentiation and heading stages. Grain yield increased 7-10% in N split as compared to all basal application. The total cross sectional area of VB in peduncle closely correlated with the number of spikelets per panicle. Nitrogen management can have an impact on spikelet differentiation through more and bigger VB and increase grain yield potential.

• 한국작물학회지
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• 제40권2호
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• pp.142-149
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• 1995

1978년부터 1992년까지 작물시험장목포지장의 시험포장에서 재배하여 관측한 목화의 4품종(Kinggus, 용당재래, 113-4,380)의 주요특성과 재배기문중 관측된 기상자과를 이용하여 목화 단작의 생육 및 수량과 기상요인과의 및 수량 추정식을 한 유도는 다음과 같다. 1. 기상요인중 변이가 큰 것은 7월의 강수량과 폭풍일수로서 변이계수가 84.89%, 97.05%로 높았고 5~9월중의 평균기온과 최고기온 및 최저기온은 비교적 변이가 적었다. 2. 생육및 수량형질의 변이는 9,10월의 적채면수량에서 68.77%, 78.52%로 높아서 연차간변이가 아주 컸고 조면비율과 결과지수는 11.77%, 19.13%로 변이가 약간 컸으며 개화기와 개서기는 6.05%, 7.83%로 변이가 아주 적어서 연차간 변이가 아주 적었음을 알 수 있었다. 3. 5월의 강수량과 결과지수간, 7월의 일조시수와 삭수간, 7월의 최고기온과 적채면 수량간, 8월의 증발량과 적채면 수량간에는 고도의 정의 상관이 인정되었다. 4. 7월의 기상요인($X_1$~$X_8$)을 이용하여 9. 10. 11월의 총적채면 수량(Y)을 추정한 결과 Y =-1080.8515 + 144.7133$X_1$+15.8722$X_2$ + 164.9367$X_3$ + 0.0802$X_4$ + 0.5932$X_5$ + 11.3373$X_6$ + 3.4683$X_7$ - 9.0846$X_8$(r＝0.8448＊＊)의 회귀식을 유도할 수 있었으며 8월의 기상요인(X$_4$를 제외한 X$_1$~X$_{9}$)을 이용하여 총적채면 수량(Y)을 추정한 결과 Y =2835.2497 + 57.9134$X_1$ - 46.9055$X_2$ - 41.5886$X_3$ + 1.2559$X_5$ - 21.9687$X_6$- 3.3763$X_7$- 4.1080$X_8$- 17.5586$X_9$의 회귀식을 유도할 수 있었으며, 이 식을 이용하여 실제수량과 이론수량과의 관계를 분석한 결과 일직선상에 아주 가깝게 추정하여 오차가 적었다.

• 한국식품영양과학회지
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• 제28권2호
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• pp.409-416
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• 1999

Microwave extraction system equipped with closed vessels was applied to confirm its capability of extracting ginseng solubles including saponin, which was monitored to optimize extraction con ditions by response surface methodology. Total yield increased with the decrease in particles size and more extraction steps. Soluble components were completely extracted by operating the system within 6 min per one step, which should be repeated by 3 or 4 times. Optimized conditions for maxi mum extraction of response variables(total yield, crude saponin) were 40~50% of ethanol concentration, about 140oC of extraction temperature, and within 6 min of the extraction time. The extraction effi ciency of total yield was dependent on the decrease of ethanol concentration, while crude saponin content was favored on the higher degree of ethanol concentration. According to the temperature guideline, below 90oC of extraction temperature, the optimal ranges of extraction conditions were predicted as 30~50% of ethanol concentration and 2.5~6.5 min of extraction time. Estimated values of total yield and crude saponin were in good agreement with experimental values.

• 한국환경농학회지
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• 제7권2호
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• pp.130-135
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• 1988

울출공업단지주변지역중(蔚出工業團地周邊地域中) 대기오염(大氣汚染)의 영향(影響)을 많이 받고있는 특정지역(特定地域)에 방풍막(放風幕)을 설치(設置)하여 배출원(排出源)에서 방출(放出)되는 대기오염물(大氣汚染物)의 영향(影響)을 줄이고, 피해원인(被害原因)을 구명(究明)하기위해 방풍막(放風幕) 앞뒤의 오염도(汚染度)와 수도(水稻)의 생육상태(生育狀態)를 조사(調査), 검토(檢討)한 결과(結果)는 다음과 같다. 1. 방풍막(放風幕) 후면(後面) 3m지점(地點)의 대기중(大氣中) $SO_2$ 및 HF농도(濃度)와 엽내유황(葉內硫黃) 및 불소함량(弗素含量)은 다른 조사지점(調査地點)보다 낮았으며, 대기중(大氣中) $SO_3$농도(濃度)와 엽내유황함량(葉內硫黃含量), 대기중(大氣中) HF농도(濃度)와 엽내불소함량간(葉內弗素含量間)에 정(正)의 상관(相關)을 보여주었다. 그리고 막후면(幕後面) 3m지점(地點)의 수량(收量)과 수량구성요소(收量構成要素)는 다른 조사지점(調査地點)보다 현저히 높은 수치(數値)를 보였다. 2. 대기중(大氣中) $SO_2$ 및 HF농도(濃度)보다는 엽내유황(葉內硫黃) 및 불소함량(弗素含量)이 수도(水稻)의 수량(收量) 및 수량구성요소(收量構成要素)와의 높은 상관(相關)이 인정(認定)되었다.

• 한국작물학회지
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• 제58권1호
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• pp.78-83
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• 2013

The excessive and indiscriminate use of chemical fertilizers in the past has brought serious soil and other environmental problems so alternatives over this agrochemical are being searched. Our study focuses on the effects of expanded rice hull inoculated with selected beneficial microorganisms on growth (through agronomic characters), yield and yield components, and grain quality indices of rice. Results showed that favorable effects of different expanded rice hull preparations were not readily apparent at vegetative stage and only treatments with supplemental chemical fertilizer application were comparable with the conventional practice. Expanded rice hull combined with 50% rate of chemical fertilizer exhibited a significantly higher yield (6,471 kg $ha^{-1}$) over conventional practice (5,719 kg $ha^{-1}$). Good milling quality indices were observed in treatments having 50% chemical fertilizers plus alternatives from expanded rice hull. Finally, we demonstrated that chemical fertilizer rate can potentially be reduced into 50% if combined with expanded rice hull, and show even better output than chemical fertilizer alone.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.317-317
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• 2017

We performed this experiment to select high quality rice adapted to wheat-rice double cropping system. We sowed barley and wheat seed in November 2, 2015. After harvesting barley and wheat, we transplanted high quality rice cultivars: 'Unkwang', 'Hopun', 'Haepum', 'Hyunoum' in June 17 and 24. We used 'sindongjin' rice as a control. As a result, 'Hyunpum' had a highest head rice yield regardless of transplanting date. Head rice yield of 'Hyunpum' was 488.1kg/10a when transplanted in June 17, and 453.6kg/10a when transplanted in June 24. The reason for this highest head rice yield was not percentage of head rice but milled rice yield. Milled rice yield of 'Hyunpum' was 526.5kg/10a when transplanted in June 17, and 490.0kg/10a when transplanted in June 24. Percentage of head rice had little differences between rice cultivars. Among yield components, only number of panicle per $m^2$ had an effect on the differences of yield between rice cultivars. The other yield components didn't have an effect on the differences of yield between rice cultivars. Compared to June 17, only 'Unkwang' had higher head rice percentage and head rice yield in June 24. Head rice percentage of 'Unkwang' changed from 67.3% to 85.0% and head rice yield changed from 324kg/10a to 393.8kg/10a when transplanting date delayed from June 17 to June 24. When transplanting date was delayed, heading date of 'Unkwang' was more delayed than other rice cultivars. By delay of heading date, mean temperature for 40days changed from $25.0^{\circ}C$ to $22.9^{\circ}C$ which improved temperature condition during grain filling stage. This improved head rice percentage and head rice yield of 'Unkwang' transplanted in June 24. If transplanting date is more delayed than June 24, 'Unkwang' could have higher head rice percentage and head rice yield. Therefore, if you transplant rice before June 24 in rice-wheat double cropping system, 'Hyunpum' is recommended as adequate rice cultivar. But if you transplant rice after June 24, further research is needed to find out adequate rice cultivar.

• 한국작물학회지
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• 제51권6호
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• pp.519-522
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• 2006

Randomized field experiments were conducted to study the interactive effect of sulphur (S) and nitrogen (N) on seed, oil and protein yield of two cultivars of groundnut {Arachis hypogea: cv Amber $(V_{1})$: cv Kaushal, $(V_{2})$.} Two dosage levels of sulphur ($0\;and\;20kg\;ha^{-1}$) and two dosage levels of N ($23.5\;and\;43.5kg\;ha^{-1}$) in various combinations were tested as micronutrient treatments, $T_{1},\;T_{2},\;and\;T_{3}$. Results indicated significant enhancement of the yield components namely seed and oil yield as well as seed protein. Maximum response was observed with treatment $T_{3}$(having 20kg S and 43.5kg N $ha^{-1})$. Increase in seed and oil yields of 90% and 103% in $V_{1}$, and 79 and 90% in $V_{2}$, respectively were recorded as compared to the control treatment $T_{1}$(having 0kg S and 23.5kg N $ha^{-1}$). Effect of S and N interaction was observed on protein, N and S content in seeds. The results obtained by these experiments clearly suggest that judicious balanced application of N and S could improve the yield.

• 한국작물학회지
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• 제31권3호
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• pp.318-325
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• 1986

논보리 수량에 미치는 기상의 영향을 구명하고자 답리작 9개 시험지에서 12개년간 수행한 올보리의 보리쌀 수양성적을 발표하고 이 시기에 조사된 수량구성요소와 기상관측치와의 관계를 검토하였던 바 몇가지 결과를 얻었기에 여기에 보고하는 바이다. 1. 보리쌀 수량은 전작에 비하여 답리작에서 감수되었고 지역간에도 차이가 현저하였으며 경남은 보리 재배에 안전성이 있었다. 2. 보리쌀 수량의 연차간 변리계수는 12.2~42.6%로서 풍ㆍ흉연간의 차이가 현저하였고, 출수기는 풍년이 흉년보다 남부가 중부보다 빨랐으며, 출수기와 수양간에는 부의 유의상관이 존재하여 출수기가 빠른 것이 증수되었다. 3. 풍년은 흉년보다 간장이 긴반면 수장은 짧은 경향이었고 수당입수는 비슷하였으나 천립중은 가벼웠으며 수수와 수량과는 고도의 정의 유의상관이 인정되어 풍ㆍ흉에 관계없이 수수가 $m^2$당 500개 이상이었던 것은 보리쌀이 10a당 250kg 이상 생산되었다. 4. 보리의 수량에 미친 온도는 풍년이 흉년에 비하여 감온성에 영향하는 영양생장기는 고온으로 교대기는 저온으로 경과되었고 감광에 지배되는 생식생장기는 비슷하였으며 월동기간의 온도와 보리 수양간에는 일정한 경향이 없었다. 5. 강우량은 풍년이 흉년보다 파종기는 적었고 유묘기에는 많았으나 월동기간에는 적었다. 4월 상순의 강우량과 논보리 수량과는 부의 유의상관이 있었는데 이 시기에 강우량이 40mm 이상이었던 것은 보리쌀이 10a당 250kg 이하로 생산되어 보리의 수량 결정적인 영향을 하있으며 4월 중순 이후에는 풍년이 흉년보다 다소 많은 경향이었다. 6. 일조시간은 풍년이 흉년보다 파종기에는 길었고 월동기간은 짧았으며 해동후 수확기까지는 긴 상태로 경과하였는데 일조시간이 보리 수량에 미친 영향은 온도 및 강우량보다 명백하지 않았다.