The experiment was carried out to investigate the effect of extension of grazing duration in late autumn on grass growth in following spring, in order to improve the rate of self-sufficiency for roughage feed. Plant height, total biomass and litter produc

나리속(屬) 식물의 촉성재배에 있어 계통 및 품종별 차광정도와 기간에 따른 생육반응을 조사하였다. 초장은 초기차광에 의해 차광율이 높아짐에 따라 'Gelria'와 ' Casablanca'는 초장이 길어진 반면 'Jolanda'와 'Land'는 오히려 짧아지는 경향이었다. 또한 연속차광에 의해 'Gelria'를 제외한 3품종은 차광율이 높아짐에 따라 초장이 길어졌으나 'Gelria'의 초장은 대조구에 비해 차광구에서 초장이 짧았다. 개화는 생육초기에 차광함으로써 'Gelria'의 경우 차광율이 높아질수록 blasting의 발생이 많아지고 개화소요일수(開花所要日數)가 단축되었으나 암처리에 의해 다시 개화소요일수(開花所要日數)가 길어졌다. 다른 품종들은 큰 차이를 보이지 않았으나 암처리구에서 'Jolanda'의 경우 blasting이 15.7% 발생하였고 'Dream land'와 'Casablanca'는 착화수(着花數)가 감소되었다. 연속 차광함으로써 'Gelria'의 경우 차광정도에 관계없이 차광에 의해 화아(花芽)가 형성되지 않았고 'Jolanda'는 75%차광구, 'Dream Land'는 50%차광구부터 각각 화수(花數)가 줄어들었으며 꽃크기도 작아졌고 'Dream Land'는 75% 차광하에서 화아(花芽)가 형성되지 않았다. 그러나 'Casablanca'는 차광구에서 단지 개화소요일수(開花所要日數)만 길어졌다. 신구(新球)의 비대(肥大)는 생육초기 차광구에서 단지 'Casablanca' 품종만 차광에 의해 신구(新球)의 비대(肥大)가 저조하였고 다른 품종들은 차이가 없었다. 그러나 연속차광에 의해서는 공시품종 모두 차광에 의해 신구(新球)의 비대(肥大)가 저조했다.

본 시험은 청예용으로 생산성이 우수한 대두를 선발할 목적으로 우리나라 전역에 재배되고 있는 종실용대두(각 도별 추천품종)10품종의 생육특성, 기호성 및 건물수량을 비교 검토한 것으로 시험은 3년간 (1989~1991) 건국대학교 자연과학대학 부속 사료포장에서 실시하였으며 그 결과를 요약하면 다음과 같다. 초장은 재배기간 70, 80일째는 장백이 90일째는 백장에서 실시하였으며 그 결과를 요약하면 다음과 같다. 초장은 재배기간 70, 80일째는 장백이 9

The objective of this study is to obtain the basic data for investigating the potentiality of continuous utili~ation (first cutting in the late fall and regrowth yield in next spring) of forage rape seeded in fall. Fresh yield and the content of nitrogeno

가을에 파종한 사초용유채(Brassica napus Subsp. oleifera cv. Swiss)의 생육기간 동안의 질소대사와 관련하여 건물수량 및 조단백질의 축적정도를 규명하기 위해. 생육기간중 수량 및 조단백질 함량을 측정하고, 엽내 carbon, nitrogen 및 hydrogen 함량을 비교. 분석하였다. 월동기인 '91년 11월 7일부터 '92년 2월 4일 동안의 생초량 및 건물량의 축적은 매우 적었으며, 엽내 C함량은 건물 1g당 382mg

노지재배(露地栽培)한 Lilium elegans 'Connecticut king'의 구근(球根) 굴취시기(掘取時期)를 개화기(開花期)인 6월 5일부터 7월 25일까지 10일(日) 간격(間隔)으로 나누고 잔존엽수(殘存葉數)를 달리해서 일정기간(一定期間) 냉장처리(冷藏處理)(, 0~105일간(日間) 8처리(處理))한 후(後) 촉성재배(促成栽培)한 결과(結果)는 다음과 같다. 1. 맹아율(萌芽率)은 저온처리기간(低溫處理期間)이 길어질수록, 잔존엽수(殘存葉數)가 많을수록 그리고 구근비대기간(球根肥大期間)이 길수록 증가(增加)하는 경향(傾向)이었으며 개화기(開花期)의 미숙구근(未熟球根)도 짧은 저온처리(低溫處理)로 높은 맹아율(萌芽率)을 나타내었다. 개화율(開花率)을 보면 개화기(開花期)의 미숙구근(未熟球根)과 엽(葉) 10매(枚)를 남기고 50일간(日間) 비대(肥大)시킨 구근(球根) 그리고 엽(葉)20매(枚)를 남기고 30일이상(日以上) 비대(肥大)시킨 구근(球根)을 90일간(日間) 저온처리(低溫處理)하였을때, 또 전엽(全葉)을 남기고 30일이상(日以上) 비대(肥大)시킨 구근(球根)을 60일간(日間) 저온처리(低溫處理)했을때 90%이상(以上)의 높은 개화율(開花率)을 나타내었다. 2. 맹아(萌芽) 및 개화(開花)소요일수(日數)는 저온처리일수(低溫處理日數)가 증가(增加)함에 따라 짧아지는 경향(傾向)이었으며 특히 개화(開花)소요일수(日數)에 있에서는 개화기(開花期)의 미숙구근(未熟球根)이 타(他) 처리구(處理區)에 비해 가장 짧았고 정식(定植) 후(後) 100 일 이내에 개화(開花)시킬 수 있었다. 3. 초장(草長), 착화수(着花數), 경경(莖經)등은 공히 개화후(開花後) 구근비대기간(球根肥大期間)이 길수록 증가(增加)하였으며 개화기의 미숙구근(未熟球根)이 가장 저조한 생육(生育)을 나타내었다. 그러나 대구(大球)를 사용(使用)한다면 구근비대기간(球根肥大期間)없이 개화기(開花期)의 미숙구근(未熟球根)을 사용(使用)하여 연내(年內) 절화재배(切花栽培)가 가능할 것으로 판단(判斷)되었다.

사초용유채의 품종선별선급실험과 유채용유채와 사초용유채품종들 간에 있어서 생산성과 영양가치를 비교한 실험에서 사초용유채 도인품종중 우리나라 남부지역의 특성에 적합한 품종으로 Velox가 사초생산성 및 영양가치면에서 가장 유망하다고 생각되었다. 따라서 Velox를 공시하여 고립적배와 실행群落培 사이에 생산성과 영양가치에 있어서 어떤 차이가 있는가를 비교하였으며 또한 생육과정중의 영양가치의 변화를 조사하였는데 그 결과를 요약하면 다음과 같다. 1. 수당 생산

Background : Currently sprout ginsengs are produced in extensive variations of cultivation times, methods and specifications that are different in each farm in Korea. Also, regardless the effective ingredient content of ginseng, overgrown sprout ginseng are distributed so that the quality standardization of sprout ginseng is urgently required. The sprout ginseng market is only a segment of the Korean ginseng market still. However, If development of processed products utilizing the functionalities is connected, the market may exponentially grow. Also, if the use of sprout ginseng is extended to productions of drinks, cosmetics, facial masks and others in the cosmetics and health functional food industries, the export competitiveness to the global market is expected to increase. Therefore, this study aims the quality standardization of sprout ginseng to secure the market competitiveness in Korea and overseas by examining the property change following the cultivation period. Methods and Results : Growth of sprout ginseng were investigated on 20 th, 30 th, 40 th and 50 th days after planting on May 30 th. Growth of above-ground parts and underground parts of 2-years-old sprout ginseng increased with longer growing period. As the growing period became longer, the sprout ginseng weight increased, that is the result of the increase of the above-ground part. Also, according to the examination on the leaves, stems and roots properties of 2-year grown sprout ginseng in each growing period, a trend that, as the growing period is longer from 20 days to 50 days, the hardness, gumminess, chewingness and fracture of leaf, stem and root are higher. Conclusion : In case of cultivating sprout ginseng in a green house, as the growth period of 2-years-old sprout ginseng was prolonged, the growth of above-ground parts and underground parts was improved. And, as the growing period of sprout ginseng was prolonged, the properties of leaves, stems and roots tended to increase.

sources of flavonoid, including quercetin, rutin and catechin. The flavonoid content of Tartary buckwheat is 9 - 300 times higher than the common buckwheat. The objective of this study was to compare phenolic compound content and antioxidant activity of tatary buckwheat and common buckwheat in different plant parts. Methods and Results : Total polyphenol, flavonoid contents and DPPH free radical scavenging activity was measured in seed, stem and leaf of tatary buckwheat followed by cultivation period. Total polyphenol content was higher in tatary buckwheat compared to common buckwheat. Total polyphenol contents was 347.33 ㎍/㎖ in tatary buckwheat seed extract and 57.24 ㎍/㎖ in common buckwheat stem (2 month). Total flavonoid content was also higher in tatary buckwheat than common buckwheat. Total flavonoid contents of tatary buckwheat seed extract was 45.68 ㎍/㎖, where as common buckwheat seed content 21.29 ㎍/㎖. DPPH free radical scavenging activity was higher in tatary buckwheat than common buckwheat. DPPH free radical scavenging activity was 85.76% in tatary buckwheat leaf (2 month) and 54.44% was in common buckwheat stem (2 month). Conclusion : This study indicates that polyphenol contents of tatary buckwheat extract depend on their part and the chronology is the seed> leaf > stem. Total polyphenol and flavonoid contents of leaf and stem is in inverse proportion to cultivation period. But, DPPH free radical scavenging activity make no difference according to plant cultivation age.

Amaranth (Amaranth caudatus) is attracting attention as a preference crop in Gyeongsangbuk-do province. To determine its growth potential and cultivation requirements, we investigated its growth characteristics, dry matter productivity, and grain yield according to the growing period. Growth and dry matter productivity were significantly higher for plants that were sown on May 10th when the temperature was the highest, whereas the yield was significantly higher for plants that were sown on April 10th. Amaranth grain yield ranged from 96 to 243 kg according to the sowing date and cultivation year. The optimum harvest time for plants that were sown on April 10th, May 10th, and June 10th were 120, 110, and 110 days after seeding, respectively. The mean temperature and growing period had a significant quadratic function with yield. Based on these equations, the optimum growing temperature was estimated as 20.6℃ and the optimum growing period as 104-119 days after seeding.

Background : The roots of Codonopsis lanceolata have been used as a tonic crude drug and an edible plant in Korea. The plant mainly contains triterpenoid saponins, including codonolaside, codonolasideⅠ-Ⅴ, lancemaside A-G. Their saponins have shown anti-inflammatory effects such as bronchitis and cough, insomnia and hypomnesia. C. lanceolata is well known to affect various pharmacological effects for human health, and its consumption is increasing. Recently, plant and plant-derived products were treated a part of the healthcare system by applying the bioactive phytochemicals. Antioxidant and immune activity substances in food play an important role as a health-protecting factor. This study was designed to investigate the in vitro immune cell growth and xanthine oxidase Inhibitory activity of different storage period and storage temperature of C. lanceolata. Methods and Results : The plant materials were used the roots of C. lanceolata cultivated in Jeju area, Korea. Immune enhancing effect was conducted using T cell and B cell of human immune cells. Each cell incubated for 8 days with the sample extracts compared to the control group, and the immune activation was measured according to the growth of immune cells. The xanthine oxidase Inhibitory activity was measured by modifying the method of Noro(1983). In different storage period and storage temperature conditions, the immune cell growth of C. lanceolata extract promoted a concentration-dependent manner in both human T cell and B cell, and did not show a significant difference. The xanthine oxidase Inhibitory activity of C. lanceolata extract tended to decrease more, depending on the longer the storage period or the higher the storage temperature. Conclusion : These results of this study suggested that the root of C. lanceolata may assist in the potential biological activities, and can be used as a source of human health products.

This study was conducted to investigate effects of waterlogging on the growth, physiological responses, and yield of Kimchi cabbage. The growth of Kimchi cabbage with applied optimized air temperature (set to 20℃) was greater than those with high air temperature (set to 30℃) and the growth significantly decreased by severe waterlogging treatment. The net photosynthetic rate of outer leaves on one hour after waterlogging treatment was higher at 72 hours waterlogging treatment in 20℃ and lower at 24 hours of waterlogging treatment in 30℃. The root activity was decreased by the elevation of waterlogging periods in 20℃ treatment and lower by the short of waterlogging periods in 30℃ treatment. The ratio of formality with non-waterlogging treatment was approximately 64% under 20℃ air temperature and that of range was from 16 to 30% under 30℃. The yield under 20℃ showed higher than that under high air temperature. The non-waterlogging treatment in 20℃ had 4,463 kg/10a, which was the greatest among all treatments, while yields of non-waterlogging treatment at 30℃ were significantly low as 1,082 kg/10a. Results suggested that additional drainage work should be needed to overcome waterlogged conditions of open field during heavy rainfall and should be drainage as soon as possible if there are waterlogging.

Soyasaponin I, II, III and V contents were investigated in seed, cotyledons and sprouts of soybean (Glycine max (L.) Merill) subjected to germination over five days. High-performance liquid chromatography coupled with tandem mass spectrometric (HPLC-MS/MS) method was used to evaluate the content of soyasaponins. Soyasaponins contents were different according to the varieties. Germination of soybeans dramatically increased soyasaponin contents in soybean sprouts in a time-dependent manner. Cotyledons had a higher contents of soyasaponins compared to dried seed (p<0.05). After five days of germination, Soyasaponin I and II increased 10 times higher after germination. Soyasaponin I and II are major metabolites in cotyledons and hypocotyls. Soyasaponin III and V were also detected in seed and increased depended on the germination stage. Soyasaponin V was at its highest levels in the hypocotyl, almost 7 times higher than the initial content in soybean seeds. Therefore, the germination of soybean sprouts significantly increased soyasaponin content.

고구마 괴근의 표피에 선모양으로 돌출되어 나타나는 피맥의 발생동향을 조사하고, 경감하기 위한 시험의 결과는 아래와 같다. 1. 고구마 피맥은 표피가 줄무늬로 돌출되어 상품성을 저하시키는 증상으로서 피맥발생은 표피층에 전분이 집적되어 발생하는 것으로 관찰되었고, 조기재배보다 보통기재배에서 발생이 많았다. 2. 고구마 품종에 따른 피맥발생은 건풍미, 연황미, 건미 등 7품종이 3%이하로 적었고, 헬씨미, 보라미는 30%이상 발생하였다. 만중은 피맥발생과 정의 상관관계가 있었다. 3. 고구마 피맥은 생육기간이 진전됨에 따라 증가하다가 삽식 후 120일경에 가장 높았다. 4. 고구마 삽식 후 90일의 적심비율에 따른 피맥발생율은 일정한 경향을 보이지는 않았다. 엽면적지수 4에서 피맥발생율이 가장 적었으나, 일정한 경향을 보이지는 않았고, 경엽절제비율이 높을수록 수량감소가 크게 나타났다.

본 연구에서는 새만금 지역에 조성된 신간척지 포장에서 담수와 하작물 재배처리가 제염 및 후작으로 재배한 청보리의 생육 및 수량에 미치는 영향을 조사 분석하여, 신간척지포장의 조기제염 기술을 개발하고자 하였다.1. 담수기간별 하작물 재배후 청보리 입모를 보면 무담수에서 m2당 216개로 입모율 25%, 1개월 담수 43%, 2개월과 3개월 담수 58%, 벼 재배구는 60% 이었다.2. 토양염농도는 청보리 파종 시에 무담수 처리에서 0.50%로 높았고, 그 외 담수처리에서는 0.2% 이내로 낮았으며, 생육 중기까지는 높아지다가 생육후기에는 파종시의 수준과 비슷하였다.3. 초장과 간장은 담수기간이 길수록 많았으며, 경수도에서 504%, 벼 재배에서는 536% 증수하였다.5. 사료가치는 담수 1개월은 단백질함량과 섬유소함량이낮게 나타났고, 담수 3개월은 벼 재배구와 사료가치면에서 비슷한 결과를 보였다.이상의 결과를 종합하여 볼 때, 새로 조성된 간척지(사양토)에서 제염을 목적으로 담수할 경우 3개월 이상 담수하거나 벼를 재배하여 제염을 하고 밭작물(청보리)을 재배하여야 어느 정도 수량을 얻을 수 있을 것으로 판단된다.많아지는 경향이었다.4. 수량은 무담수에서는 극히 적었으며, 담수기간이 길수록 수량은 급격히 증가하여, 무담수 대비 3개월 담수에서 504%, 벼 재배에서는 536% 증수하였다. 5. 사료가치는 담수 1개월은 단백질함량과 섬유소함량이낮게 나타났고, 담수 3개월은 벼 재배구와 사료가치면에서 비슷한 결과를 보였다.이상의 결과를 종합하여 볼 때, 새로 조성된 간척지(사양토)에서 제염을 목적으로 담수할 경우 3개월 이상 담수하거나 벼를 재배하여 제염을 하고 밭작물(청보리)을 재배하여야 어느 정도 수량을 얻을 수 있을 것으로 판단된다.

This study was conducted to improve the managing and storing methods of the seeds of Aralia cordata var. continentalis (Kitagawa) Y.C.Chu, to examine the viability and the germination ability of seeds with different storing conditions and methods, and to develop new ways to propagate and have better healthy seedling. Therefore, the germination rate, days required for germinating seeds, and early growth responses of Aralia cordata var. continentalis (Kitagawa) Y.C.Chu were investigated with different storing temperatures, durations and methods. The germination rate was higher in stratified storage than that in dry storage condition. The highest germination rate was with outdoor temperature at 30 days after stratified storage. The days required for germinating seeds were less than 10 days with the treatment of 25℃ and outdoor temperature in stratified storage. In dry condition, they were shorter with 4℃ and 25℃ than those with -20℃ and outdoor temperature. Leaf number of seedling was higher in stratified storage compared to that in dry condition, while it was not clearly different according to storage temperatures and durations. Leaf length and leaf width of seedling was not difference among the treatment of storage methods, temperatures, and durations. Stem length of seedling was higher in stratified storage than those in dry condition, while root length was not clearly different among the treatments. It would be assumed that temperatures, methods and durations of storage could affect much to the germination rate and the early seedling growth response.