• 한국식품저장유통학회지
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• 제4권2호
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• pp.131-137
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• 1997

Effect of storage on the tree and quality of early cultivar of Citrus unshiu Marc. produced in Cheju according to harvest time were investigated. Soluble solids, acid content, flesh ratio, firmness and specific cavity of the fruits harvested at 27th of November were 12.0, 1.03%, 79.98%, 0.774kg-force, 0.912, respectively. Soluble solids, total sugar and reducing sugar were increased gradually, but acid content was decreased slightly as delayed in harvest time. Otherwise specific gravity and firmness were not shown in great during harvest time, color index(a/b) was increased sharply till late November and then remained in stationary phase. On these result, we recommend that the harvest time of early cultivar of Citrus unshiu Marc. would be during December because of wilting partly. Fully ripened-fruits harvested late, compared to ordinary harvest time, with cold storage would be kept more quality and freshness of fruits for fresh consumption than the fruits harvested early and stored at room temperature.

• 한국초지조사료학회지
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• 제16권1호
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• pp.75-80
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• 1996

The corn is one of the most important forage crop in Korea. The harvest time for silage affects dry matter (DM) yield and silage quality. This study was carried out to determine the effect of harvest time on the DM yield and nutritive value of corn forage at the Experimental Livestock Farm, College of Agriculture and Life Sciences, Seoul National University, Suweon in 1991. Forage DM yield and DM content of corn forage significantly increased mainly due to increase of ear. And also the ear to total DM ratio increased from 30% to 55% as the harvest was delayed. Chemical composition of the corn forage was improved by reduction in crude fihr, neutral detergent fiber and acid detergent fiber as the harvest was delayed. This results indicated that the harvest time of corn forage plays an important role to determine DM yield and DM contents for silage materials.

• 한국작물학회지
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• 제25권4호
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• pp.1-9
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• 1980

To determine the optimum harvest time of recent rice varieties from Indica/Japonica remote crosses, leading varieties Suweon 264 and Milyang 23 were tested for the changes in dry matter weight and moisture content of grain, shattering, shelling ratio, milling ratio, and apparant physical quality during grain development at 5 day-intervals from 20 days to 55 days after heading. The results are summarized as follows: 1. Grain weight (dry matter) reached its maximum (physiological maturity) at 30 days after flowering (DAF) in Suweon 264, and at 35 days in Milyang 23, and thereafter it did not change significantly until 55 DAF. 2. Time course of decrease in grain moisture content (Y, %) during maturation (X, DAF) consisted of two linear phases, i.e. a fast and a slow period: Y=68.245-1.33X until 34DAF, and Y=23.025-0.470X until 55DAF after 34DAF in Suweon 264; Y=73.62-1.634X until 24.5DAF, and Y=33.59-0.570X until 55DAF after 24.5DAF in Milyang 23. Two varieties showed the same grain moisture content of 28% (wet basis) at physiological maturity in spite of the distinct differences in the heading date, time of physiological maturity and thereby ripening climate. 3. Force to shatter a grain ranged about 90 to 100g in Milyang 23, and about 200 to 250g in Suweon 264 and in a Japonica variety, Jinheung. The force, however, did not change significantly with harvest time from 35DAF to 50DAF. 4. The changes in the ratios of shelling, milling, broken rice and tinted rice with harvest time were insignificant during a period from 35DAF to 55DAF. However, ratios of green rice and white belly rice decreased significantly with delay in harvest time during 10 days after physiological maturity. 5. The best time of harvest for maximum yield and good quality is thought to be 10 days after physiological maturity, and grain moisture content at this time was about 20% on wet basis.

• 한국식품저장유통학회지
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• 제5권1호
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• pp.1-6
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• 1998

Physicochemical properties of early cultivar of Satsuma mandarin(Citrus unshiu Marc. var. miyagawa) according to harvesting year during 1990 to 1995 were investigated. Climatic conditions of every year affected the quality of citrus fruits. Compared to other harvesting years, flesh ratio and soluble solids were higher, but acid content was lower on citrus fruits produced in 1994, as for good climatic conditions during growth of fruits. Especially, acid content of fruits produced in 1993 was higher, compared to those of years, as for low mean temperature and high rainfalls. Fruit weight, peel thickness and soluble solids had a good linear correlation to fruits size, but acid content and flesh ratio had not correlation derived from difference of individual fruits. From the climatic data, the prediction of fruit quality would be possible in some degree before harvest. It seemed recommend to ably the flexibe method by harvesting year for the quality stanardization of citrus fruit.

• International Journal of Industrial Entomology and Biomaterials
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• 제4권2호
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• pp.143-147
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• 2002

Studies on the interrelationship between biological yield and harvest index, and their association with shoot rearing were carried out in 9 promising mulberry genotypes, which indicated significant variations among genotypes. Biological yield had close association with leaf yield components indicating that they are inter-related for higher productivity in mulberry, Biological yield revealed highly significant positive correlation with important leaf yield components. However height of the longest branch showed negative correlation with biological yield. Genotypes with higher biological yield associated with low ratio of stem weight to leaf weight and high Harvest index on dry weight basis are to be selected for shoot rearing. Biological yield recorded on fresh weight basis had less impact on the present study in comparison to dry weight basis.

• 한국식품저장유통학회지
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• 제7권1호
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• pp.51-56
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• 2000

Quality characteristics of Satsuma mandarin (Citrus unshiu Marc.var.miyagawa) harvest on early December according to production areas and sea level altitude of Cheju were investigated. Soluble solids and flesh ratio were distributed 9.32∼12.50, 75.95%-81.3 in citrus fruits harvested in orchards located below 10m sea level altitude (lower area), and was 10.23-12.17 , 77.35%-80.29% on those over 150m sea level altitude )higher area), respectively. Acid content of citrus juice was 0.95%-1.26% in fruits harvested inlower area, and was 1.02%-1.39% in higher area. In proportion to late harvesting , Brix/acid ratio and fruits quality was improved. Soluble solids of fruits harvested in higher area were higher than those of fruits from higher area, but acid contents were on the contrary . In sensory evaluation on fruit appearance, the differences between two altitudes were not clear.

• 한국작물학회지
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• 제47권6호
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• pp.475-478
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• 2002

보리의 산물처리 확대를 위한 기초자료를 제공하고자 미곡종합처리장을 이용한 보리 산물처리시 품질변화와 생력효과를 조사 분석한 결과는 다음과 같았다. 1. 정립율은 2.5-2.2mm의 비율이 가장 많았으며, 건조방식에 따른 차이는 없었다. 2. 경도는 건조방식에 따른 차이는 없었고, 색도는 산물건조와 관행인 천일건조와 차이는 없었다. 3. 흡수율은, 고형용출물, 퍼짐성 등의 취반특성은 건조방식에 따른 차이는 없었다. 4. 산물처리에 의하여 관행의 ha당 46시간에 비하여 21시간으로 54.3%의 생력효과가 있었고, 수확 후 관리는 54.3% 생력화되었다. 5. 산물처리로 수확 후 관리노력이 관행에 비하여 ha당 25시간이 절감되어 101,83원의 경영비 절감효과가 있었다.

• 한국버섯학회지
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• 제13권4호
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• pp.310-313
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• 2015

산느타리버섯 '호산', '화산' 품종을 대상으로 강원도농업기술원에서 개발한 배지와 농가에서 사용하는 배지를 가지고 수확후배지 첨가율에 따른 생육 및 수량특성 조사결과, 강원도에서 개발한 배지에서는 호산품종에서는 대조구에 비해 수량 차이가 거의 없었고, 화산에서는 20%까지 수량이 증가하였다. 농가에서 사용하는 배지에서는 호산품종은 20%까지 수량 차이가 없었고 30%에서 다소 적어진 것으로 나타났다. 화산품종에서는 첨가율이 높을수록 수량이 점차 떨어지는 경향이 나타났다. 이 시험연구를 통해 산느타리버섯 수확후배지를 20%까지 재사용한다면 생산비 절감 뿐만 아니라 폐배지 폐기처리 비용 절감 등 농가소득에 기여할 것으로 여겨진다.

• 한국초지조사료학회지
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• 제10권1호
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• pp.15-20
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• 1990

본 실험은 혼파초지에서 봄철 1차 이용시기와 1차 이용후 재생기간에 따른 목초의 일당 건물생산량, 경엽분포비율, 일반성분함량 및 세포벽 구성물질 등에 미치는 영향을 구명하고자 1차 이용시기(주구)를 영양생장기(초장 25-30cm), 절간신장기(초장 40~50cm) 및 출수기(초장 60~70cm)로 하고 1차 이용후 재생기간(세구)을 20, 30 및 40일로 하여 1987년도와 1988년도 2개년에 걸쳐 실시하였다. 1차 이용시 일당생산량은 늦게 이용할수록 증가하나 2차 이용후부터는 감소하여 1차 이용을 빨리 하는 것이 좋았으며, 재생기간은 건물생산량 측면에서 20일은 너무 짧고 40일은 너무 길어 30일이 가장 유리하였다. 목초 경엽분포비율은 1차 이용을 일찍 할수록, 1차 이용후 재생기간을 짧게 할수록 잎의 비율은 증가하고 줄기의 비율은 감소하여 사료가치는 증진되었다. 목장의 사료가치(일반성분함량과 제포벽구성물질)도 1차 이용을 영양생장기로 일찍 할수록, 1차 이용후 재생기간을 짧게 할수록 증가하였다. 조사자질생산량은 1차이용을 늦게 할수록 증가되었으나 2차 이용시부터는 상살되었으며, 재생기간 30일에서 조사자질생산량은 가장 많았다. 이상의 결과로서 초지에서 목초의 양호한 재생, 건물생산성, 수절생산성 및 사료가치 등을 고려해볼 때 봄철 1차 이용은 가급적 일찍하는 것이, 그리고 1차 이용후 재생기간은 1차 이용시기에 관계 없이 30일 정도로 하는 것이 가장 바람직하다고 생각된다.

• Asian-Australasian Journal of Animal Sciences
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• 제19권4호
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• pp.507-513
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• 2006

Changes of in vitro true digestibility (IVTD) of Napiergrass (Pennisetum purpureum) were determined by a filter bag system, and their relationships to chemical composition, leaf to stem ratio, plant height, geographic location, climatic factors and harvest interval were studied and used to develop prediction models for the crude protein (CP), acid-detergent fiber (ADF), and neutral-detergent fiber (NDF) contents and IVTD. Partitioning the total variance of IVTD of Napiergrass showed that 80% was attributable to the effect of harvest interval. Days of growth, plant height, leaf/stem ratio, CP, ADF and NDF of Napiergrass had highly significant relationships (p<0.01) with IVTD. The highest coefficient of correlation between the ADF, NDF, and IVTD of Napiergrass and growth degree days was obtained when the base temperature was set at $0^{\circ}C$. Growth degree days could predict ADF, NDF, and IVTD of Napiergrass more accurately than plant height, and plant height is not suitable to predict IVTD.