• Fisheries and Aquatic Sciences
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• 제15권2호
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• pp.163-168
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• 2012

The non-utilized biomass of the aquacultured seaweed Undaria pinnatifida, particularly the rhizoid, is an alternative source of arachidonic acid (AA). Of the five aquacultured kelps that were tested, U. pinnatifida yielded the highest amount of AA, which was isolated from the rhizoids. Its identity (C20:4 n-6) was confirmed from gas chromatography-mass spectrometry spectral data. The optimal conditions for post-harvest storage or pretreatment of the rhizoids in Provasoli's enriched seawater for AA extraction were determined to be pH 7.8, 2% $CO_2$-enriched air, 20 ${\mu}mol\;m^{-2}\;s^{-1}$ light, and $10^{\circ}C$. Under these conditions, the AA content after 1 day of storage was enhanced by up to 127%. In the absence of light under ambient aeration, the AA content after 1 day of storage diminished to 90%. Rhizoids collected late in the season (April and May) contained the highest amounts of AA (approximately 2.5 mg/g tissue).

• 한국초지조사료학회지
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• 제22권4호
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• pp.241-246
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• 2002

호밀-헤어리베치 혼파는 높은 생산성과 토양보전 측면에서 추천되어진다. 본 시험은 이런 혼파조합을 이용함에 있어 적정 파종 및 수확시기를 구명하기 위하여 수행되었다. 수확이 지연됨에 따라 호밀과 헤어리베치의 초장은 커졌으며 파종시기간에는 차이가 없었다. 건물 함량은 파종시기간에는 큰 차이를 보이지 않았지만 수확시기간에는 수확이 지연될수록 유의적으로 높아져 5월 중순경에 약 30% 전후를 나타내었다. 조단백질 함량은 출수기에 17~18%에서 급격히 떨어져 5월에는 9~10%대로 낮아졌다. ADF 및 NDF 함량은 수확이 늦어짐에 따라 증가하였으며 IVDMD 및 TDM 함량은 낮아졌다. 건물수량은 수확시기에 큰 영향 을 받았으나 파종시기는 영향을 주지 못했다. 이상의 결과를 종합하여 볼 때 호밀-헤어리베치 혼파 구의 수확은 후 작물로 옥수수를 고려 시는 4월 하순경에 수확을 하며 후 작물로 조생 옥수수나 수수 $\times$ 수단그라스계 잡종을 고려 시는 5월 중순경에 수확하는 것이 추천되었다.

• 한국초지조사료학회지
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• 제17권1호
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• pp.89-92
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• 1997

The aim of the research was to investigate the herbage yield and some characteristics of three triticale cultivars (Beaguelita, Eronga and Juanillo) harvested at the boot and milky-waxy ripeness stages in 1993-94 and 1994-95. A randomized complete block design with three replications was used. Although there were no significant differences between the years and the cultivars, significant differences were found between the harvest stages and for most of the parameters studied superiority was observed for the late cutting (at milky-waxy ripeness). The highest crude protein (11.9%) and crude ash (9.4%) contents were obtained h m the boot stage, whereas the highest yields for green matter, dry matter, crude protein and crude ash were obtained h m the milky-waxy ripeness stage (34.94; 11.65; O.% and 0.92t/ha, respectively). Also, the dry matter content was higher at the late cutting (33.4%).

• Journal of Ginseng Research
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• 제14권1호
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• pp.63-66
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• 1990

The development of cracking in ginseng roots was studied to elucidate the factors affecting it in the field. The cracking of 6-year-old ginseng roots harvested in late October callld be induced in 2 days after soaking in water or in watersatllrated soil. However, it callld be slowed down by approximately 10 days when the roots were kept at a low temperature(5$^{\circ}C$). Roots excavated in late May did not develop cracking tinder the conditions tested. There was no significant difference between rice-straw shade and P.E. net shade in the rate of cracked ginseng roots. Which varied with ginseng varieties in relation to shade material. The rate of cracked roots was about 40% in 6-year plants, but it was extremely high (55.6%) in rusty roots. Healing of the wound formed by cracking was generally low but varied between harvest years.

• 한국약용작물학회지
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• 제23권5호
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• pp.395-399
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• 2015

Background : This study examined the effect of harvesting time on the growth, yield characteristics, and major beneficial components in Salvia miltiorrhiza. Methods and Results : Although plant height, stem diameter and branch length were not affected by harvesting time, the number of stems was highest when harvested in mid October. There were no differences in root length and thickness, however, the rhizome was thicker when it was harvested at the end of October or early November than when it was harvested in early and mid October. The dried root weight also showed a similar pattern. However, there was a statistically significant increase to 408 kg (16%) in the rhizome weight when in late October and a rise to 455 kg (29%) when harvested in early November. Harvest time had little effect on the content of the major component of S. miltiorrhiza. For example, salvianolic acid content rose from 9.42 to 9.64% with later harvest times, and tanshinone ${\prod}A$ content was tended to be slightly more increased in mid October which S. miltiorrhiza has 0.22% tanshinon ${\prod}A$ than in early October. Conclusions : According to these results, the optimum harvest time for S. miltiorrhiza is early November when plant or major component yields are hightest. There were no significant harvest time effects on the major beneficial components.

• 한국약용작물학회지
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• 제28권2호
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• pp.136-141
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• 2020

Background: The leaves of the goji berry (Lycium chinense Mill.) are used as raw materials in processing and by replace fruits to some extent. The reason is that the leaves are cheaper, however, betaine content is higher than in the fruits. These experiments were conducted to determine the planting density and cutting height for producing a large number of leaves. Methods and Results: The cultivar 'Myeongan' with many branches was used. When the shoot height reached 50 cm - 70 cm, harvesting was possible four times a year. The time to next harvest was approximately 38 days after regeneration of new shoots. Leaf quantity was in the order of 1st > 2nd > 4th > 3rd harvest. Insect damage occurred during the third harvest in late July and early August, therefore, eco-friendly control was necessary. The total yield was higher at the planting density 60 cm × 30 cm than that of 60 cm × 20 cm or 60 cm × 40 cm. The yield at cutting for shoot height of 60 cm was increased by 6.3 percent compared to that of 50 cm, At the cutting height of 70 cm, harvest was difficult owing to hardening of stems and thorns. Betaine content, an indicator component of goji berry, was not significantly different according to planting densities and cutting height. Conclusions: The ideal cutting period to produce leaves of goji berry for processing is when the shoots grow to approximately 60 cm, and the leaves can be harvested 4 times a year. The dried-leaf yield was highest at the planting density of 60 cm × 30 cm.

• 한국국제농업개발학회지
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• 제30권4호
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• pp.370-375
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• 2018

본 연구는 근래에 건강 기능성효과가 널리 알려지면서 수요가 증가함에 따라 재배면적과 생산량이 증가하고 있는 종실용 들깨의 기계화재배를 촉진하기 위하여 수확 때 종자탈립에 의한 손실률은 최소화하고 수량성을 높일 수 있는 최적 파종시기를 설정하고자 수행하였다. 1. 파종기가 늦어질수록 파종후 개화기까지 생육일수는 짧아져 6월 15일 파종대비 6월 30일, 7월 15일 및 8월 1일 파종에서 각각 14일, 26일 및 31~32일 짧아졌으며, 또한 경장과 경태는 짧아지거나 가늘어졌으며 마디수가 적어지는 경향을 나타냈다. 2. 유효분지수는 6월 15일 파종대비 6월 30일, 7월 15일 및 8월 1일 파종에서 각각 82%, 61% 및 56%로 7월 15일 파종부터 급격히 낮아져 수량성 확보에 불리한 것으로 판단되었다. 그리고 최저화방군의 높이는 파종기가 늦어질수록 대체로 짧아지는데, 소담의 7월 15일과 8월 1일 점파구의 경우 15 cm 이하로 예취기를 이용한 기계수확에 불리하게 작용할 것으로 판단되었다. 3. 파종기와 수량성 간에는 고도의 유의성이 인정되었는데, 총수량은 6월 15일, 6월 30일 및 7월 15일 파종에서 통계적 유의차는 없었지만, 종실탈립률의 경우 7월 15일, 8월 1일(30.3%) > 6월 15일(15.3%) > 6월 30일(13.5%) 파종의 순이었는데, 탈립된 종실을 제외한 순수량은 6월 30일$${\geq_-}$$6월 15일 > 7월 15일 > 8월 1일 파종 순으로 높게 나타났으며 이러한 경향은 품종 및 파종방법에 관계없이 나타나는 일반적인 특징이었다. 4. 들깨 종실의 단백질 함유율은 파종기가 늦어질수록 대체로 증가하여 8월 1일 파종에서 가장 높았으며, 조지방 함유율의 경우 소담은 6월 15일과 7월 15일 파종에서, 들샘은 6월 30일과 7월 15일 파종에서 비교적 높았으며, 리놀렌산의 함량율은 8월 1일 파종에서 특이적으로 높은 수준을 나타냈다. 5. 위의 결과, 종실용 들깨의 예취기를 이용한 기계수확을 위한 최적 파종시기는 6월 30일 경으로 이때 파종하면 수확 때 종실탈립에 의한 손실률은 최소화하면서 수량증대에 유리하여 기계수확에 가장 적합한 파종시기로 판단되었다.

• 한국초지조사료학회지
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• 제13권2호
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• pp.132-138
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• 1993

Yield and plant constituent responses of forage sorghum cultivars have usually been compared in uniform defoliation management test. However the influence of harvest time on differential response of cultivars needs more precise definition. Therefore this study with sorghum-sorgo-sudan hybrid cv. NC+Sweet Leaf, and Super Su 22 and Sorghum-Sorghum hybrid cv. Pioneer 931 was carried out under two defoliation regimes, namely defoliation at heading stage of each variety and defoliation on the same calendar date in response to heading stage of early variety. The results are summarized as follows; 1. Three harvests were taken by early variety with 80 days and two harvests by late variety with 94 days from sowing to heading. 2. Dry matter and TDN yield tend to be higher when the plants are cut at ear emergence stage of late variety. 3. Crude protein content was similar for the same growth growth stage of 1st growth and 1st regrowth, and rather big different between varieties. 4. Considering only dry matter and TDN yield, it is recommendable to cut two times at ear emergence stage of late variety and also three times at ear emergence stage of early variety in view point of utilization period extension and distribution of forage products.

• 한국초지조사료학회지
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• 제16권2호
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• pp.169-176
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• 1996

An experiment was carried out to determine the effect of cultivar and tedding frequency on changes of moisture content of oat(Avena sativa L.) hay during field drying and on quality of baled oat hay after storage. The experimental design was a split-plot with the four oat cultivm such as 'Magnum', 'Cayuse', 'West' and 'Murray' as main plots and the two tedding frequencies such as 1 or 3 times a day as subplots in three replications. Moisture content of fresh cut oat cultivar was higher in the order of 'Magnum', 'Cayuse', 'West', and 'Murray' and the moisture content difference among the cultivm was maintained to the final curing day(P< 0.05). Moisture loss from the oat hay during the last 3 curing days was greater with 3 tedding a day than I tedding a day. Temperature of baled oat hay began to rise critically from the 6th day of storage and wa5 highest in 'Magnum' oat cultivar($45.3^{\circ}C$). Total nitrogen and ADIN contents of late maturing oat hay 'Magnum' and 'Cayuse' were higher than those of early maturing 'Murray' and 'West'. Tedding frequency did not influence total nitrogen and ADIN contents. ADF and NDF contents of early maturing oat hay were higher than those of late maturing oat hay. Relative feed value (RFV) of 'Magnum' oat hay was the highest(l06) and classified as Grade 2 in forage quality standard. Quality grade difference between early and late maturing oat cultivan was only 1 or 2.

• 한국식품과학회지
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• 제16권1호
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• pp.59-65
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• 1984

토마토 과실의 숙성방법과 수확시기가 비타민 조성에 미치는 영향을 조사하기 위하여, 선정된 5개의 토마토 품종을 대상으로 1978년과 1979년에 걸쳐 연구한 결과를 요약하면 다음과 같다. 토마토 중의 아스콜빈산 함량은 breaker ripened tomatoes가 vine ripened tomatoes보다 유의성 있게 높았으며, 이 결과는 2 년동안 일관성 있게 나타났다. 수확시기에 따른 토마토 중의 아스콜빈산 함량은 계절 초기에 수확된 토마토에서 현저히 낮았고, 그 이후에 수확된 것들 간에는 유의성 있는 차이가 없었다. 토마토 중의 캐로틴 함량은 vine ripened tomatoes와 breaker ripened tomatoes 간에 유의성 있는 차이가 없었으며, 이 결과는 2 년간 일관성있게 나타났다. 늦은 계절에 수확한 토마토는 그보다 일찍 수확한 것보다 훨씬 많은 캐로틴을 함유하였다. 토마토중의 지아민과 리보후라빈 함량은, 1978년에는 vine ripened tomatoes가 breaker ripened tomatoes 보다 유의성 있게 높았으나 1979년에서 유의성있는 차이가 없는 것으로 나타나, 앞으로 더욱 연구가 필요하다고 여겨진다. vine ripened tomatoes 중의 지아민과 리보후라빈 함량은 계절이 진전됨에 따라 감소하는 경향이 있었으며, 계절초기에 수확한 토마토가 그 이후에 수확된 것들보다 유의성있게 높은 지아민 및 리보후라빈 함량을 나타내었다.