• Journal of The Korean Society of Grassland and Forage Science
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• v.14 no.3
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• pp.247-256
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• 1994

This experiment was carried out to determine harvesting date and cultivar effects on growth characteristics, forage yield and quality of spring sown oats(Avena surivu L.) at the forage experimental field, College of Agricultural and Life Sciences, Swul National University, Suwwn from March 22 to June 20, 1993. The experiment was arranged in a split plot design with three replications. The main plots consisted of the harvesting dates such as early(24 May), mid(8 June) and late(20 June). The subplots consisted of different maturities of oat cultivm such as Speed oat, Cayuse, Foothill, Sv841034 and Magnum.

• Proceedings of the Korean Society of Postharvest Science and Technology of Agricultural Products Conference
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• 2003.04a
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• pp.142.1-142
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• 2003

저장 중 단감은 과피 및 과육의 변색 발생으로 인한 품질저하가 심각하게 발생하고 있는데, 아직까지 이를 방지하기 위한 원인 규명은 매우 미흡한 실정이다. 이에 본 연구에서는 단감의 재배지, 수확시기, 크기, 예조기간, 저장온도, 저장기간, 포장재의 두께 등을 달리하여 저장하면서 처리조건에 따른 단감 과육의 갈변 발생 관련성을 조사하였다. 단감의 변색발생 증상은 저장 1개월 이후부터 일부 나타나기 시작하여 저장기간이 경과할수록 심하였다. 단감의 갈변 발생률 및 갈변 정도를 실험 처리구별로 살펴보면 과수원, 수확시기, 예조기간, 저장온도, 포장재의 두께, 포장 내 가스조성에 따라 차이를 보였는데 단감의 수확시기가 늦을수록, 수확후 예조기간이 짧을수록, 저장을 위해 사용한 포장필름의 두께가 얇을수록 갈변발생정도가 심하였다. 또한 단감의 과수원에 따라서도 갈변의 발생률이 차이를 보여 동일지역이더라도 재배조건에 의하여서도 영향을 받는 것으로 나타났다. 이와 같은 결과를 종합하여 보면 단감 과육의 갈변발생은 수확 전 및 수확 후 인자들의 단독적인 영향이기보다는 복합적인 영향에 의한 것으로 추정되었다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.60 no.2
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• pp.174-179
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• 2015

This experiment was conducted to determine the optimal harvesting time for barley and wheat grain for the production of fermented grain feeds, and to investigate their fermentation quality according to harvesting time. As a result, grain moisture content was decreased with late harvest, whereas spike weight ratio and 1000 grain weight were increased with prolonged period after heading. Grain yielding was increased with late harvesting time significantly at p<0.05. Crude protein content was increased with late harvesting time, but crude fiber content was decreased. Crude fat and ash content were slightly decreased, but not statistically significant. Comparing the effects of fermentation on feed value of winter cereal grain, the approximate compositions were slightly increased after fermentation, but the difference was not significant. Fermentations resulted in increasing the pH value of winter cereal grain silage with late harvesting time, but decreasing the lactic acid content (p<0.05). No significant difference was found in acetic acid, and butyric acid was not detected. Considering the quantity and quality of fermentation, barley and wheat can be used for winter cereal grain silage when they were harvested at 35 days and 40-45 days after heading, respectively.

• Food Science and Preservation
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• v.15 no.2
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• pp.269-273
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• 2008

In this study, we investigated changes of general components and biological activity of the fruit of Prunus mume. The average moisture content of the fruit ranged from 88.34-90.04%. Crude protein and crude fat contents were not significantly different among samples. During ripening, crude protein decreased and crude fat increased. The level of polyphenols in the fruit gradually increased during ripening. An antimicrobial activity test indicated that methanol extracts had the highest activity and that the antimicrobial activity increased gradually with harvest time. Antimicrobial substances in methanol extracts of the fruit maintained their activity after heating at $100^{\circ}C$ for 30 minutes and were unaffected by changes in pH. The antioxidant activities of extracts isolated with different solvents were: methanol> ethylacetate > water> ether> hexane. Antioxidant activity was not significantly different for different harvest times. The antioxidant index of the methanol extract was also the highest in electron donating activity.

• Food Science and Preservation
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• v.19 no.5
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• pp.652-658
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• 2012

This study, the changes in physicochemical properties and hesperidin content of Jeju-processed citrus fruits according to the harvest date were evaluate. The soluble-solid content, pH, and soluble solid-acid ratios gradually increased, but titratable acidity slightly decreased with a delay in the harvest date. The color index, lightness, yellowness, and turbidity slightly decreased whereas the redness slightly increased with a delay in the harvest date. The hesperidin content slightly decreased with a delay in the harvest date. Hesperidin, which is the major cause of juice cloudiness, decreased with a delay in the harvest date. These results suggest that later-harvested fruit juice is bound to be less cloudy.

• 농업기술회보
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• v.48 no.4
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• pp.39-40
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• 2011

맥주보리는 수확시기와 수확 후 관리방법에 따라 품질의 차이가 매우 크다. 특히 맥주보리는 제맥(보리를 발아시켜 건조)이라는 과정을 거쳐 맥주를 만들기 때문에 발아율이 무엇보다 중요하다. 하지만 맥주보리의 수매제도가 색택 위주의 외관을 보고 품질등급을 정한다. 따라서 농가에서는 완숙 이전에 수확하여 고온에 건조시켜 출하하기 때문에 발아율이 저하되는 등 맥주보리 원맥의 품질을 크게 떨어뜨리는 원인이 되고 있다. 이에 맥주보리의 알맞은 수확시기와 수확 후 관리방법을 소개하여 양질의 원액생산에 도움을 드리고자 한다.

• 농업기술회보
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• v.49 no.5
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• pp.34-35
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• 2012

벼 이삭이 팰 때는 각종 환경에 민감한 시기로 물 관리 등 벼농사 후기관리를 잘해야 최고품질의 쌀을 생산할 수 있다. 유숙기 이후 물 관리와 적기수확 시기, 벼를 수확한 이후 올바른 건조과정을 통해 최고 품질의 쌀을 생산하는 기술을 알아본다.

• Journal of The Korean Society of Grassland and Forage Science
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• v.29 no.3
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• pp.217-226
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• 2009

This study was carried out to investigate the effects of collection time on the physical characteristics, Nutritive value, digestibility and palatability in rice straw. Collection time of rice straw after the rice harvest was allocated into nine treatments: T1 (10 days), T2 (25 days), T3 (40 days), T4 (55 days), T5 (70 days), T6 (85 days), T7 (100 days), T8 (115 days) and T9 (130 days). The results are summarized as follow: Plant length, leaf length and green degree were decreased with prolonging collection time. Mold distribution and dry matter loss were increased with prolonging collection time. Crude protein and crude fat were decreased with prolonging collection time, crude fiber were increased with prolonging collection time. But crude ash showed multifarious. In situ dry matter digestibility was decreased with prolonging collection time. Palatability of Hanwoo, Holstein and deer was decreased with prolonging collection time. The results of this study indicate that good rice straw collection time would be recommendable during the from 10 days to 40 days after rice straw harvest.

• The Korean Journal of Food And Nutrition
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• v.27 no.6
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• pp.1051-1058
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• 2014

Yuza (Citrus junos) had 3 varieties and they had variable physiochemical properties. This study analyzed free sugar, hesperidine, naringin, flavonoid contents and antihypertensive activities according to variety and harvest time of Yuza. Three Yuza varieties, native (C. junos I), improved I (C. junos I + Poncirus trifoliata), improved II (C. junos I + C. junos II) were used. Harvest time could influence biochemical properties of Yuza such as acidity and $^{\circ}brix$. When the Yuza harvested at behind of season, the sugar/acid ratio went up because the acidity was decreased but sugar content was increased. Fructose content was dramatically high at November, Yuza of the season. Total flavonoids was high in pulp parts of improved II and in juice of native one harvested at October. The content of hesperidin and naringin in peels and juices were high in immature fruits fresh-picked at July since then they were decreased steadily and there were no difference according to varieties. The angiotensin converting enzyme (ACE) inhibition was powerful at pulp of Yuza in particular native one picked at November.

• Korean Journal of Plant Resources
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• v.27 no.2
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• pp.119-124
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• 2014

This study was accomplished to investigate the effect of harvest time on the contents of polyphenolic compounds such as epicatechin, catechin, resveratrol and quercetin in grapes (Vitis spp.). The souble solids contents were increased with harvest time delay, while the titratable acidity continuously decreased in all cultivars. Brightness (L) was higher in 'Campbell Early' and 'Shigyoku', Hunter a value was high in 'Shigyoku' which was harvested later. Hunter b value seemed to be different in 'Shigyoku' depending on harvesting time. The contents of EC which was extracted 'Campbell Early, 'Shigyoku' and 'M.B.A' were higher late harvest time than early harvest time, reapectively, In 'Shigyoku which requires the direct light, the contents of EGC and EC showed distinct differences depending on harvesting time. The compositions of epicatechin were different depending on cultivars. The contents of catechin and resveratrol were higher in 'Campbell Early' and 'M.B.A' which were harvested later, but 'Shigyoku' which was harvested earlier. The contents of quercetin was higher in 'Campbell Early' which was harvested earlier, but 'Shigyoku' and 'M.B.A' which were harvested later. In comparison with 'Shigyoku' and 'M.B.A', catechin and resveratrol contents were seen to be higher in 'Campbell Early' irrespective of harvesting time.