• 한국육종학회지
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• 제43권2호
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• pp.139-144
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• 2011

Fifty-five sweet pepper (Capsicum annuum L.) germplasm from the Rural Development Administration (RDA) were analyzed for their fruit yield and fruit quality characters, including fruit weight, fruit size, pericarp thickness, total soluble content, fruit lobe, fruit shape, fruit surface and fruit color. Fruit yield per plot ranged from 200 g to 8150 g (average, 1884 g). Fruit fresh-weight per fruit ranged from 27.3 g to 200.0 g with an average of 97.2 g. Fruit length varied from 4.0 cm to 16.2 cm (average, 9.6 cm). Fruit length-to-width ratio ranged from 0.6 to 3.0 with an average 1.7. The fruit pericarp thickness ranged from 1.8 mm to 10.7 mm (average, 4.8 mm). Total soluble content was the highest ($8.5^{\circ}Brix$) in K156286 and the lowest ($5.3^{\circ}Brix$) in K156208 with the average value $6.7^{\circ}Brix$. Fruit lobes numbers varied from 2 to 4. Blocky, triangular, elongated, rectangular and round fruit shape identified among the sweet pepper accessions. Fruit surface varied from smooth to wrinkle and fruit color also varied. The presence of variability in fruit yield and quality traits within the sweet pepper genotypes can be utilized to develop high yielding sweet pepper variety with better fruit quality characters.

• 한국식품저장유통학회지
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• 제17권4호
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• pp.466-470
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• 2010

본 연구는 유기질 멀칭에 의해 배 '신고' 과실 품질에 미치는 영향을 알아보기 위해서 수행되었다. 볏짚 멀칭은 엽중 칼륨, 마그네슘, 칼슘 함량을 높였지만 모두 적정농도 이하의 수준을 나타냈다. 과실의 경도는 참나무껍질에 의해 증가하였고 당도는 참나무껍질과 볏짚에 의해 증가하였다. 참나무 껍질은 가장 높은 당산비를 보였고 진한 붉은 계열의 과피색을 착색시켰다. 과실의 칼륨은 볏짚에서 칼슘은 참나무껍질에서 가장 높았으나, 두 무기성분간의 과실 내 흡수에 있어서 길항작용이 있었던 것으로 판단된다. 일반적으로, 과실 품질을 향상시켰던 유기질 멀칭 자재인 참나무껍질과 볏짚은 석세포 함량을 감소시켰고 유기질이 투입되지 않는 폴리에틸렌은 대조구와 비슷한 석세포 함량을 보였다. 따라서 과원 내 유기질이 투입된 멀칭 시용은 과실 품질을 부분적으로 향상시켰고 과실의 씹힘성을 저해하는 석세포를 감소시켜서 과실의 품질 개선에 기여한 것으로 판단된다.

• 현장농수산연구지
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• 제15권1호
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• pp.75-84
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• 2013

2011년 4월부터 10월까지 국내 사과주산지 상업사과원에서 왜성대목을 이용한 '후지'와 '홍로' 사과원에 대하여 사과원 경영형태와 이에 따른 과실특성과 수익성을 조사하였다. '후지' 품종의 사과는 300g 이상의 과실을 '홍로' 품종의 사과는 330g 이상의 과실을 대과로 구분하는 것이 일반적이었으며 착과밀도와 유효수량을 비교한 결과 '후지' 품종의 사과나무는 주간 단면적당 3.28개, 0.96kg의 과실을 '홍로' 품종의 사과나무는 4.04개, 1.01kg의 과실을 생산하였다. 이를 이용하여 과원경영형태를 대과생산, 중소과생산, 병행으로 구분하여 단위면적당 전체 수량과 과실 등급별 수량을 비교한 결과 착과밀도가 증가함에 따라 단위면적 당 수량은 증가하였다. 반면 착과밀도의 증가는 대과생산량을 저하시키고 중소과생산을 증가시켰다. 생산된 과실을 과중에 따라 구분한 후 과실특성을 비교한 결과 과중은 과실특성에 유의한 차이를 발생시키지 않았다. 대과 생산과 비교하여 중소과 생산은 과원 경영을 위한 투입비용을 감소시켰고 그 결과 과원경영에 의한 소득구조를 개선시켰다.

• 원예과학기술지
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• 제31권6호
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• pp.687-699
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• 2013

This study was conducted to examine the effect of grafted peppers (Capsicum annuum) on different rootstocks on fruit quality. Three pepper cultivars, 'Nokkwang', 'Saengsaeng Matkkwari', and 'Shinhong' were grafted onto five commercial rootstocks that are known to be resistant to Phytophtora blight. Non-grafted or auto-grafted peppers were used as controls. Grafted plants were grown during two consecutive harvest periods by semi-forcing culture (April to August) and retarding culture (September to March the subsequent year). Full size green fruits were harvested and weighed weekly from June to August (Semi-forcing culture) and from December to March of the subsequent year (Retarding culture). The fruit size, weight, flesh thickness, and firmness were measured every month. Total marketable yield was not significantly influenced by either auto-graft of 'Nokkwang', 'Saengsaeng Matkkwari', and 'Shinhong' of pepper or grafted with the five commercial rootsctocks. By contrast, grafting influenced the apparent fruit quality of peppers. Fruit characteristics differed depending on the rootstock cultivars. However, the fruit characteristics of rootstock did not affect the fruit characteristics of scion grafted onto that rootstock. Fruit characteristics in each treatment differed among harvest time (first, second, and third harvest). Fruit quality parameters were also different as affected by the harvest period. In conclusion, apparent quality and textural property of pepper fruits were influenced by not only grafting with different rootstocks but also by the harvest period and harvest time. Accordingly, rootstock/scion combination, the scion variety and the harvest period must be carefully chosen to get the desired optimal fruit quality.

• 생물환경조절학회지
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• 제8권4호
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• pp.265-274
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• 1999

본 연구는 perlite를 이용한 오이의 양액재배시 적정 배지량과 근권용적을 구명하고자 용기의 크기가 2, 4, 6, 8 및 $10{\ell}$인 플라스틱 포트에 펄라이트를 채워 오이를 양액 재배하였다. 근권용적이 증가할수록 초장, 경경, 엽수 및 엽면적이 증가하였고, 과실수와 과실중량에서는 근권용적이 큰 $8{\ell}$ 와 $10{\ell}$ 의 처리구에서 가장 양호하였으며 기형과 발생률도 낮은 경향이었다. 근권용적을 $6{\ell}$ 이상으로 하였을 때 경으로의 건물분배가 줄어들고 엽으로의 건물분배가 많았다. NAR과 CGR은 근권용적이 증가함에 따라 증가하는 경향을 보였다. 관권용적에 관계없이 본 실험 범위내에서는 LAI가 증가할수록 NAR과 CGR도 증가하는 경향을 나타내었다.

• 센서학회지
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• 제11권2호
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• pp.93-101
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• 2002

농산물의 품질은 여러 가지 인자에 의해 결정되는데, 이 인자들은 파괴 또는 비파괴 측정방법을 이용하여 측정되고 검사된다. NIR분광분석법은 당도, 산도와 같은 내부품질을 측정하는데 이용되고 있다. 과일의 색, 크기와 같은-외부 품질 측정에는 CCD 카메라가 사용되고 있다. 오늘날 이러한 비파괴 검사법이 널리 연구되고 있다. 컵 위에 자동으로 탑재되어 카메라와 NIR장비로 실시간으로 측정된 과일의 품질과 등급은 내부 외부인자에 의해 결정된다. 본 논문은 과일 선별기를 제작함에 있어서 과일의 칼라영상의 경계를 검출하는 수정된 윤곽선 추적법과 일반적인 방법보다 빠른 속도로 연결점 데이타를 구성하는 방법을 제안한다. 연결점 데이타는 과일 영상의 크기 계산과 하나의 컵에 중복탑재 과일과 컵 사이에 불량 탑재된 과일을 검사하는데 사용된다. 설계된 과일 선별기는 귤의 경우 과인의 당도 산도 및 크기를 검사하면서 초당 8개의 과일을 선별할 수 있다.

• 방사선산업학회지
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• 제6권3호
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• pp.257-265
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• 2012

This study was carried out to evaluate growth, morphological characteristics, and sugar content among fifty six blackberry (Rubus fructicosus) genotypes derived from gamma-ray treatment (fifty two lines), MNU treatments (three lines), and cross breed R. fructicosus${\times}$R. parvifolius(one line). While 56 genotypes had similar stem diameter with origin variety, the most of mutants showed reduced leaf size. Also, they showed a wide range of variation in fruit size and one hundred fruit weight compared with origin variety. In fruit size and sugar content, two mutant lines showed large fruit sizes and ten mutant lines showed 20% higher sugar content than the original variety. In the correlation analysis, positive relationships were determined between sugar content and stem diameter, fruit length, leaf wide and fruit length/fruit wide ratio. However, leaf length/leaf wide ratio showed a negative correlation with sugar content. The results will be used as fundamental data for Rubus fructicosus breeding program.

• 농업과학연구
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• 제49권3호
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• pp.561-570
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• 2022

This study investigated the changes in planting environment and growing conditions of 'Arisoo' apple trees under shading net treatments. Apple tree canopies were fully covered with Blue (blue color net, mesh size: 4 mm × 5 mm), Black-A (black color net, mesh size: 4 mm × 5 mm), Black-B (black color net, mesh size: 5 mm × 6 mm), and uncovered trees were used as the control. Inside the tree canopies, the illuminance was observed as 100% (85.0 Klux) in the control, but it decreased to 75% (64.3 Klux) in the Blue, 73% (63.0 Klux) in the Black-A, and 77% (65.9 Klux) in the Black-B nets, respectively. The solar irradiance was observed as 755 w·m^-3 in the control, but it was decreased to 715 w·m^-3 in the Blue, 624 w·m^-3 in the Black-A, and 647 w·m^-3 in the Black-B nets, respectively. The average daily temperature was observed to be the highest in the Black-A net (31.8℃) while it was observed to be around 30.0℃ in the control, Blue, and Black-B nets. In addition, the average fruit surface temperature was observed to be the highest (39.4℃) in the control, but it was decreased to 38.1℃ in the Blue, 37.3℃ in the Black-A, and 39.0℃ in the Black-B nets. However, the average soil temperature, the shoot growth rate, and leaf SPAD values were not different in all the treatments. Fruit sunburn disorders were the highest in the control while it was observed to be lower in the fruits from trees covered with the shading nets. However, at harvest, the fruit quality parameters were not different in all the treatments. Overall, this study suggests that the apple trees covered with the shading nets reduced the illuminance, solar irradiance, fruit surface temperature, and fruit sunburn disorders. However, the shading nets did not affect tree growth and apple fruit quality.

• The Plant Pathology Journal
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• 제24권1호
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• pp.87-89
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• 2008

A blue mold on tomato fruit caused by Penicillium oxalicum occurred sporadically in a greenhouse at Gyeongsangnam-do Agricultural Research and Extension Services. Infection usually occurred through wounds or cracks on the fruits. Symptoms began with water soaking lesions, then became watery and softened eventually. Colony of the causal fungus was white at the early growing stage, turned green on Czapek yeast extract agar and malt extract agar. Conidia were ellipsoidal in shape and $2-6{\times}2-4{\mu}m$ in size. Stipes were septate, smooth, thin walled, and $90-280{\times}3-4{\mu}m$ in size. Penicilli were mostly biverticillate. Ramuli were 1-3 groups, smooth, and $10-16{\times}2-3{\mu}m$ in size. Rami were 1-2 groups and $6-30{\times}2-4{\mu}m$ in size. Metulae were 2-3(5) verticils, smooth, and $12-20{\times}3-4{\mu}m$ in size. Phialides were 5-7 verticilate, ampulliform to cylindroidal, smooth, and $8-12{\times}2-3{\mu}m$ in size. Optimum temperature for growth was about $25^{\circ}C$. Pathogenicity of the fungus was proved on tomato fruit according to Koch's postulation. On the basis of mycological and pathological characteristics, the fungus was identified as P. oxalicum Currie & Thom. This is the first report of the blue mold on tomato fruit caused by P. oxalicum in Korea.

• 농업과학연구
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• 제49권3호
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• pp.421-430
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• 2022

Crop load management in apple trees is important for achieving optimum productivity and crop value. Hence, we investigated the influence of different crop loads on the fruit quality, mineral content, and yield of the 'RubyS' apple variety. After 4 weeks of full bloom, the crop load was adjusted by hand thinning to different (5, 10, and 15 fruits·cm^-2) trunk cross-sectional areas (TCSA), representing low, medium, and high crop loads. The low crop load increased the fruit size and weight, the development of the red-blushed area, and the peel color a^* at harvest; however, it reduced the total number of fruits·tree^-1 and yield compared with that of the other crop loads. The medium crop load improved the fruit weight, flesh firmness, and soluble solids content and reduced the fruits·tree^-1 but did not affect the fruit size and yield. However, there were no significant differences in the titratable acidity and starch index among the crop loads. The fruit mineral content (phosphorus and potassium) was higher in the low and medium crop loads compared to the high crop load. However, the nitrogen, calcium, and magnesium contents in the fruits were not affected by the crop loads. Overall, this study suggests that a low crop load improves the fruit size and weight, but its effect on the quality and fruit mineral content is similar to that of a medium crop load. Therefore, the optimum crop load level for the 'RubyS' apple trees was approximately 10 fruits·cm^-2 TCSA.