• 한국자원식물학회지
• /
• 제19권2호
• /
• pp.248-251
• /
• 2006

삼백초의 지상부 생육은 1년에서 2년차의 생육은 증가 폭이 컸으나, 2년에서 3년차의 생육은 감소하거나 부진하였다. 1년차에서는 소식일수록 생육이 양호하였으나, 3년생은 밀식할수록 차이가 없거나 감소하였다. 단위면적당 엽수와 경수는 재배년수가 경과하고 밀식할수록 많았다. 경엽(莖葉) 수량이 1년생은 밀식에서, 2년생은 $40{\times}10cm$에서, 3년생은 $40{\times}20cm$에서 가장 많았다. 근경중(根莖重)은 1년생에서 2년생은 중량의 증가폭이 켰으나, 2년생에서 3년생은 증가 폭이 둔화되었다. 재식거리간 근경중은 년차 간 고도의 유의성이 있었으며, 경엽중에 비해 매우 높았다.

• 한국작물학회지
• /
• 제67권4호
• /
• pp.326-334
• /
• 2022

This study was carried out to investigate the optimal nitrogen concentration level suitable for forage rice growth by hydroponic cultivation in the salinity concentration of 0.1~0.3% which is similar to that of Muan reclaimed paddy field, and based on this results, to estimate optimal nitrogen fertilization level by field experiment in Muan reclaimed paddy for maximum forage production by cultivation of Yeongwoo rice. As a result of the growth response to the salt and nitrogen concentrations in the hydroponic cultivation experiment, the growth amount increased as the nitrogen concentration increased in the range of 0~24 me/L in the absence of salt stress. However, at a salt concentration of 0.1~0.3%, the growth amount was the highest at a nitrogen concentration of 12 me/L, and at higher nitrogen concentrations of that, the rice growth decreased as the nitrogen concentration increased. Therefore, nitrogen concentration of 12 me/L was judged to be an appropriate concentration for forage rice growth at salt concentration of 0.1~0.3%, and a nitrogen fertilization amount level corresponding to a nitrogen concentration of 12 me/L was actually applied to the Muan reclaimed paddy field for forage rice cultivation during two years. The amount of nitrogen fertilizer was tested with three treatments, which are 18 kg/10a considered appropriate, and 1.5 times and 2 times of the appropriate amount, and the planting density was tested with 2 treatments of 15 hills/m² and 26 hills/m². As a result of the reclaimed paddy field experiment, the yield was the highest when nitrogen fertilizer was applied at 18 kg/10a in the planting density of both treatments. Looking at the yield according to planting density, the high planting density plot yielded higher than the low planting density plot. In other words, when the planting density was 26 hills/m² and the nitrogen fertilization amount was 18 kg/10, the highest dry matter yield of 1,763 kg/10a was obtained. From the results of hydroponics and reclaimed field experiments, we could conclude that the productivity of forage rice decreased more as the nitrogen concentration increased when the nitrogen concentration was higher than the optimal level under salt stress.

• Journal of Plant Biology
• /
• 제30권2호
• /
• pp.135-149
• /
• 1987

An experiment was made in order to analyze the growth characteristics and productivity of Zoysia japonica under control, mowing and TIBA treatment conditions at the experimental farm of Kyung Hee University. The field was planned by the split plot design method and each treatment was given to two plots (40$\times$40 and 100$\times$100 mm) and was replicated three times. Each plot was 9$m^2$ for Zoysia japonica. The sampling of each plot was taken once a week after sowing. In order to know the dry matter of total standing crops, each organ of plants was kept at 9$0^{\circ}C$ and weighed. Total leaf area of a plant was measured by drawing method. The author adopted the growth analysis of English School. Holocellulose analysis by sodium chlorite method was made. The increasing rate of LAI was high in all plots between 10th and 12th week after sowing and high growth rate of assimilatory organ was observed in low density area of TIBA plot. Between 10th and 12th week after sowing all the experimental plots showed high increasing rate of standing crop and in the process of growth each density area of TIBA plot recorded high increasing rate. In all the plots F/C ratio and RGR were high when the growth rate of assimilatory organ was increasing cosiderably, and the higher the planting density was, the higher F/C ratio was recorded. In all the plots NAR recorded maximum rate before the growth period to show a high increase of RGR. In the process of the growth TIBA plot showed high icnreasing rate of NAR. CGR showed high value in high density areas of all the plots and reached its maximum in the 13th week after sowing. Compared to the other experimental areas the low planting density areas of control plot and TIBA plot showed considerable earlier lignification indicating low Holocellulose content in the growth process.

• 한국조경학회지
• /
• 제43권6호
• /
• pp.16-24
• /
• 2015

본 연구는 국내 4대강 유역에 조성된 수변녹지를 대상으로 탄소의 저장 및 연간 흡수를 계량화하고, 수변녹지의 탄소저감 효과를 증진하기 위한 조성방안을 모색하였다. 표본 선정한 40개소 연구 대상지의 녹지구조 및 식재기법은 흉고직경이 평균 $6.9{\pm}0.2cm$이고 식재밀도가 $10.4{\pm}0.8$주/$100m^2$로서, 소형 수목의 저밀 단층식재로 대표된다. 식재수목에 의한 단위면적당 탄소의 저장량과 연간 흡수량은 각각 평균 $8.2{\pm}0.5t/ha$, $1.7{\pm}0.1t/ha$/년이고, 식재밀도가 높을수록 증가하는 경향을 보였다. 토양의 유기물함량과 단위면적당 탄소저장량은 각각 $1.4{\pm}0.1%$, $26.4{\pm}1.5t/ha$이었다. 대상지의 수목과 토양은 1ha당 약 61kL의 휘발유 소비에 상당하는 탄소량을 저장하고, 수목은 해마다 1ha당 3kL의 휘발유 소비에 기인한 탄소배출량을 상쇄하는 효과를 나타냈다. 이 탄소저감은 식재 후 5년 이상~10년 미만 생장한 효과로서 식재수목의 생장과 더불어 훨씬 더 증가할 것으로 예측된다. 연구 대상지와 상이한 식재기법의 조성모델들을 선정하여 향후 30년 동안 수목생장에 따른 연간 탄소흡수량의 변화를 비교 시뮬레이션하였다. 그 결과, 경과년도별 누적 탄소흡수량은 식재규격이 더 크고 식재밀도가 더 높은 다층 군식의 생태식재모델에서 저밀 단층식재인 대상지보다 10년 및 30년 경과시 각각 약 1.9배, 1.5배 더 많았다. 수변녹지의 탄소저감 효과를 증진하기 위해서는 규격이 상대적으로 큰 수목을 혼식하는 다층 군식, 속성수를 포함하여 연간 생장률이 양호한 자생수종의 중 고밀 식재, 식재수종의 정상적 생장에 적합한 토양조건 구비 등이 요구된다. 본 연구결과는 조성 초기단계인 수변녹지 사업에서 수질보전 및 생물서식에 부가하여 탄소흡수원의 역할을 제고하기 위한 실용적 지침이 될 것으로 기대한다.

• 한국환경농학회지
• /
• 제42권3호
• /
• pp.239-252
• /
• 2023

Most apple trees in South Korea are grafted on M.9 and M.26 rootstocks; however, these rootstocks are susceptible to fire blight. Although M.7 rootstocks are moderately resistant to fire blight, they tend to exhibit excessive vigor, which is unsuitable for high-density planting, unless weak cultivars are used. This study investigated the vegetative growth, yield, and fruit quality of apple trees grafted onto M.7, M.9, or M.26 rootstocks to assess the feasibility of establishing high-density apple orchards domestically using the M.7 rootstock a period of seven years (1-7 years after planting). Rootstocks were tested using three cultivars with contrasting induced vigor and harvesting times: vigorous and late-maturing 'Fuji,' moderate vigor and middle-maturing 'Hongro,' and low vigor and early-maturing 'Sansa.' The planting density was maintained constant, with 190 trees per 10 a. Primary thinning (leaving only the king fruit on clusters) was performed, whereas secondary thinning (controlling crop load) was not. Vegetative growth, accumulated yield per 10 a, and yield efficiency varied depending on cultivars and rootstocks; however, the cultivars had a more notable effect on fruit quality than the rootstocks. Biennial bearing often occurred in the M.26 rootstock. 'Fuji'/M.7 was overly vigorous for high-density planting. The fruit quality and accumulated yield per 10 a of M.7 were similar to those of M.9 with the 'Hongro' and 'Sansa' cultivars. In particular, 'Hongro'/M.7 did not show tree vigor reduction due to heavy crop load, and the degree of biennial bearing in 'Sansa'/M.7 was not particularly high. These results indicated that high-density apple planting using the M.7 rootstock was achievable using the 'Hongro' and 'Sansa' cultivars.

• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2022년도 추계학술대회
• /
• pp.91-91
• /
• 2022

Popcorn grains are consumed around 10,000 tons per year, in South Korea. It is consumed in amusement parks, movie theaters and snacks. The size of the popcorn processed market in Korea is estimated to be 3.6 billon won per year. So, the popcorn grain market has good prospects. On the other hand, domestic grain is at the level of 1 %, which is less domestic production than the size of the market. Maize Research Institute has developed domestic varieties in order to increase the use of domestically produced grains. The Oyrunpopcorn variety which was commonly distributed is a preferred cultivar because it has a good popping rate compared to imported grains. In addition, 'G-Popcom', 'Oyrun #2' and 'Kichan Popcorn' were developed, which diversified the choice of the farmers. Yield per unit area is important to improve farmers' income. At present, domestic grain production is traded at 5,000 won/kg, so if the yield improves, a high farmer^ income is expected. Therefore, this study compared the growth characteristics and yield according to the appropriate sowing time and plant density to improve the yield of domestically grown popcorn. We used 'Oryunpopcorn', for this research. Agronomic characteristics were compared by sowing times April 23, May 22 and June 22. The 100 seeds weight were 15.9g, 17.7g and 15.0g, respectively. Kernel weight planted in May 22 is the highest value. Yield per 10a were 414kg, 434kg and 296kg, respectively. It shows the yield planted in May 22 was higher than other trials. Therefore, the sowing time to increase the kernel weight and yield is appropriate for planting in mid-May. The number of plants in planting density trial was 5,700 plants, 4,700 plants and 4,000 plants in 10a area. Plant height at each trial were 221 cm, 214cm and 218cm, respectively. It was the highest height in 5,700 plants trials. The 100 kernel weight were 14.8g, 15.9g and 16.5g, respectively. Low planting density trial indicated high kernel weight. Yield per 10a was 415kg, 357kg and 314kg, respectively. It was higher at high density trial than other experimental plots. Therefore, appropriate sowing time was in mid-May and planting density was 5,700 plants/10a in order to increase the yield of popcorn in South Korea. This study will be useful for farmer's income to use the domestic cultivars.

• 한국약용작물학회지
• /
• 제21권6호
• /
• pp.433-438
• /
• 2013

This study was conducted to obtain the basic data for using the Artemisia anuua as a new economic crop, thus Artemisia anuua was investigated their cultivation characteristics, yield, and variation of artemisinin contents by planting density and harvesting times. Seed characteristics of A. anuua have observed micro-size, and their germination optimum temperature was at 15 to 20 celsius degree. Planting density on the yield of A. anuua was increased high density better than low density. The highest yield was planted in the space of $30{\times}10$cm. Moreover, optimum harvesting time of A. anuua was investigated in early september and a periods of most highly detected artemisinin was time of before and after blooming of A. anuua.

• 한국초지조사료학회지
• /
• 제12권1호
• /
• pp.49-58
• /
• 1992

본 실험은 재식밀도와 재식양식이 Sorghum-Sudangrass hybrid(sordan 79)의 생육특성, 건물수량, 조단백질수량, 기호성 등에 미치는 영향을 알아보고자 실시하였으며 그 결과를 요약하면 다음과 같다.1. 재식밀도가 높아짐에 따라 초장, 엽장, 엽폭(P<0.05), 엽수는 대체적으로 감소하였고, 같은 재식밀도에 있어서는 직사각형구에서 증가하였다.2. 1차 예취시 엽비솔은 밀식구중 직사각형구(30kg/ha, 25cm$\times$4cm)에서 가장 높게 나타났으나 2차 예취시에는 중식구중 정사각형구(15kg/ha, 14cm $\times$14cm)에서 높게 나타났다.3. 고사솔은 재식밀도가 증가될수록 높아졌으며 또한 같은 재식밀도라도 정사각형구가 높았다. 4. 분벽수는 재식밀도가 높아질수록 감소 되었고 같은 재식밀도에서는 직사각형구에서 증가되는 경향이었다. 5. 생초수량과 건물수량은 공히 중식구중 직사각형구(1.5kg/ha, 33cm$\times$6cm)가 가장 높았으며 소식구에서 가장 낮았다. 6. 조단백질 량은 재식밀도가 높아짐에 따라 높은경향을 나타냈으며(P<0.05) 조단백질수량도 재식밀도가 높아질수록 수되었다.7. 경의 굵기는 재식밀도가 높아짐에 따라 가늘어졌고 NDF, ADF함량은 뚜렷한 경향이 없었다. 1차 예취시에 있어서 기호성은 밀식구>중식구>소식구순이었으나 2차 예취시에는 밀식구>소식구>중식구순이었다.식구순이었다.

• 한국초지조사료학회지
• /
• 제12권1호
• /
• pp.19.2-19.2
• /
• 1992

본 실험은 재식밀도와 재식양식이 Sorghum-Sudangrass hybrid(sordan 79)의 생육특성, 건물수량, 조단백질수량, 기호성 등에 미치는 영향을 알아보고자 실시하였으며 그 결과를 요약하면 다음과 같다.1. 재식밀도가 높아짐에 따라 초장, 엽장, 엽폭(P<0.05), 엽수는 대체적으로 감소하였고, 같은 재식밀도에 있어서는 직사각형구에서 증가하였다.2. 1차 예취시 엽비솔은 밀식구중 직사각형구(30kg/ha, 25cm$\times$4cm)에서 가장 높게 나타났으나 2차 예취시에는 중식구중 정사각형구(15kg/ha, 14cm $\times$14cm)에서 높게 나타났다.3. 고사솔은 재식밀도가 증가될수록 높아졌으며 또한 같은 재식밀도라도 정사각형구가 높았다. 4. 분벽수는 재식밀도가 높아질수록 감소 되었고 같은 재식밀도에서는 직사각형구에서 증가되는 경향이었다. 5. 생초수량과 건물수량은 공히 중식구중 직사각형구(1.5kg/ha, 33cm$\times$6cm)가 가장 높았으며 소식구에서 가장 낮았다. 6. 조단백질 량은 재식밀도가 높아짐에 따라 높은경향을 나타냈으며(P<0.05) 조단백질수량도 재식밀도가 높아질수록 수되었다.7. 경의 굵기는 재식밀도가 높아짐에 따라 가늘어졌고 NDF, ADF함량은 뚜렷한 경향이 없었다. 1차 예취시에 있어서 기호성은 밀식구>중식구>소식구순이었으나 2차 예취시에는 밀식구>소식구>중식구순이었다.식구순이었다.

• 한국환경생태학회지
• /
• 제26권5호
• /
• pp.801-811
• /
• 2012

본 연구는 도시공원의 토지피복 및 식재구조에 따른 온도 영향요인을 규명하는데 목적이 있다. 성남시 분당구 중앙공원을 대상으로 전 지역에 대한 토지피복 및 식재현황을 파악하였으며 30개의 조사구를 설정하여 정밀 토지피복 및 식재구조를 파악하고 온도는 10회 반복 측정하였다. 온도 영향요인은 토지피복유형, 식재유형, 층위구조, 녹지량(녹피율, 녹지용적계수)을 선정하여 실측 온도와의 통계분석을 실시하였다. 토지피복유형, 식재유형, 층위구조와 실측 온도와의 분산분석 결과, 토지피복유형에서 목본 식재지는 저온역으로 초지와 포장지는 고온역으로 구분되었다. 식재유형은 침엽수 및 활엽수 식재지는 저온역으로, 초지와 포장지는 고온역으로 구분되었다. 층위구조는 교목층과 교목층+하부식재 유형은 저온역으로, 초지와 포장지는 고온역으로 구분되었다. 녹지량과 실측 온도와의 상관관계 분석 결과 녹피율과 녹지용적계수는 모두 실측 온도값과 고도의 음(-)의 상관관계가 인정되었다. 녹지량과 실측 온도와의 회귀모형에 의하면 녹피율은 1% 증가할 때마다 $-0.002^{\circ}C$, 녹지용적계수는 $1m^3/m^2$ 증가할 때마다 $-0.122^{\circ}C$의 온도저감 효과가 있을 것으로 예측되었다.