• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1997.05a
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• pp.46-52
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• 1997

소과종 수박의 고밀도 지주재배시 질소시비량을 260kg/㏊, 200, 140, 0, 무비구로 하여 생육, 수양, 품질 및 무기양분 흡수에 미치는 영향을 조사한 결과는 다음과 같다. 가. 생육특성은 질소시용구가 0kg시용구와 무비구보다 초장, 엽면적, 생체중 및 건물중이 좋았고, 질소시용구간에는 차이가 없었으며 엽수는 모든 처리구에서 차이가 없었다. 나. 수량특성은 140kg/ha시용구가 32,010kg/ha로 가장 높았고, 착과율도 79%로 가장 높았다. 다. 품질특성은 140kg 시용구가 식미지수 3.9, 당도 12.5 $^{\circ}$Bx로 다른 처리구보다 좋았고, 무비구가 12.0 $^{\circ}$Bx로 처리구 중에서 가장 낮았다. 과피두께는 질소 시비량이 증가할수록 두꺼웠다. 라. 식물체(잎)내 T-N의 함량은 질소시비량이 많았던 처리구일수록 증가폭이 컸으며, 모든 처리구에서 생육중기에 가장 많이 흡수되었다. 인산함량은 질소시비량에 따라서 큰 차이가 없었으며 칼슘함량은 질소시비량이 많을수록 증가하는 경향을 보였고, 마그네슘 함량은 칼슘과는 달리 질소시비량이 많을수록 생육후기에 낮았다. 마. 이상의 결과를 종합해 보면 소과종 수박을 밀식하여 지주재배를 실시할 때 토양 염류집적을 줄여주고, 품질 및 수량을 향상시키기 위해서는 질소시비량을 대과종 수박재배시의 70% 수준으로 줄여서 시비하는 것이 바람직하다고 사료된다.

• Korean Journal of Agricultural Science
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• v.35 no.2
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• pp.119-126
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• 2008

This study was carried out to find the botanical characters and effect of weed control for herbicides treatment after barley sowing. Barley variety used in study was "Yuyeon", hood-type awn for whole crop forage use, which developed at RDA in 2004. Sowing date was on 10th October, 2007, and was drilled as $60{\times}20cm$. Herbicides were treated on 2th day after barley sowing. Measured items were number and kinds of weeds at each treatment and growth characteristics and grain yield in barley. Cerastium holosteoides var. hallaisanense among weeds surveyed at tillering stages in Butachlor treatment were highly appeared, but Alopecurus aequalis var. amurensis did not appeared while Alopecurus aequalis var. amurensis was 39 plants and Capeslla bursa-pastoris was 37 plants in check. Occurrence of the Capeslla bursa-pastoris at primary survey and Cerastium holosteoides var. hallaisanense in ripening stage were high, while Alopecurus aequalis var. amurensis did not emerged. Botanical characteristics of barley each as plant height, number of tillers and spiklets per plant. surveyed at ripening stage were higher than check. Grain yield per 10a was the highest at Alachlor among treatments, while dry matter of leaf and culm were similar among treatments. Therefore, effect of yield increasing of barley by herbicide after sowing was reconfirmed through this study. Especially, effect of Alachlor was lightly high compared with others.

• Journal of The Korean Society of Grassland and Forage Science
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• v.41 no.2
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• pp.71-76
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• 2021

In order to establish optimal double cropping system for getting the maximum annual productivity, we investigated annual fresh and dry yields of winter forage crops (WFC), Italian ryegrass (IRG) 'Kowinearly', triticale 'Joseong' and summer forage crop (SFC), 'Jonong' and 'Jowoo' as whole crop silage rice in the paddy field of Yeongseo of Gangwon Province. The double cropping of each crops was applied with 2 standard cultivation method of WFC and SFC from 2018 to 2020. For the WFC, the average percentage of dry matter (29.6%) of IRG 'Kowinearly' was lower than that (35.5%) of triticale 'Joseong'. The average fresh matter yield of IR G 'Kowinearly' was 2,662kg/10a that there was no significant difference from the 2,836kg/10a of triticale 'Joseong'. The average dry matter yield (996kg/10a) of triticale 'Joseong' was more than that (696kg/10a) of IRG 'Kowinearly'. For the summer forage crops, the average percentage of dry matter of whole crop silage rice, 'Jonong' was 34.5% that there was no significant difference from the 35.0% of 'Jowoo'. The average fresh matter yield (5,367kg/10a) of 'Jowoo' was more than that (3,966kg/10a) of 'Jonong'. And the average dry matter yield (1,936kg/10a) of 'Jowoo' was more than that (1,433kg/10a) of 'Jonong'. The total maximum dry matter yield was 2,982kg/10a with the combination of the WFC triticale, 'Joseong' and the SFC whole crop silage rice, 'Jowoo'. In conclusion, the combination of crops that can obtain the maximum yield of high quality forage for double cropping is sowing the WFC triticale, 'Joseong' in mid-October, harvesting 'Joseong' around the end of May and then SFC whole crop silage rice, 'Jowoo', to be transplanted in early June.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.33 no.4
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• pp.336-342
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• 1988

An experiment was carried out to know the effects of paclobutrazol application time on the lodging related traits and yield of a rice variety. Seomjinbyeo, at two nitrogen leveles. Paclobutrazol (3kg 10a of 0.6% G) was applied 43, 33, 23, and 13 days before heading (DBH) and lodging related traits were observed 10, 20, 30, and 40 days after heading (DAH). Earlier applications of paclobutrazol reduced the length of lower internodes and later applications reduced the upper internodes. Culm length tended to decrease as time of paclobutrazol application delayed. Although lodging was not occurred in all plots. lodging index of paclobutrazol treated plots was lower than that of control and increased with maturity, Fresh weight of shoot increased up to 30 DAH and then decreased. Both fresh weight and breaking strength did not show consistent tendency with time of paclobutrazol application and observation. Direct effect of shoot fresh weight contributing to lodging index decreased with maturity. but that of breaking strength and culm length was similar during the ripening stages. Direct effect contributing to lodging index was greater in the order of breaking strength culm length. and fresh weight 40 DAH. Starch content of culm base decreased up to 20 DAH and then increased up to 40 DAH. Cellulose content increased up to 20 DAH, but hemicellulose and lignin did not change significantly during the ripening stages. Starch, cellulose, hemicellulose, and lignin contents of culm base did not correlated with breaking strength and time of paclobutrazol application did not show consistent results. Paclobutrazol applied 13 DBH did not reduce yield of rice. but the earlier applications reduced yield due to a reduced number of spikelets per panicle.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.38 no.2
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• pp.121-127
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• 1993

The barley plant for whole crop forage is advantageous to have traits with higher photosynthetic rate, biomass, lodging resistance, and awnless spikes. The objective of this study is to investigate performance of near-isogenic line pairs for the awned and awnless in the field, and to observe the variations in photosynthetic rate, yield and their related traits under removal of flag leaf and awns. Grain yield was 6% higher, but biomass and photosynthetic rate were 6～16% and 6% lower in the awned line than those in the awnless grown in the field ,respectively. Defoliation of flag leaf resulted in approximately 3～4%, and 5～6% decreases in 1,000 kernels and grain weights, respectively. Deawning at the heading stage of the long awned line decreased 1,000 kernels and grain weights by 7% and 15%, respectively, The removal of both assimilative tissues caused 14 and 21% decrements in 1,000 kernels and grain weights. Apparent photosynthetic rate of leaf blade in awnless line was 6.1 -9. 7 $CO_2$$_2$ ${\mu}$mole $m^{-2}$ $s{-1}$, much higher than that in awned line. The relative rates in the second and third leaves were about 93% and 55～63%, respectively as compared with that in the flag leaf. The results of the experiments suggest that the awnless line selected for whole crop forage is a potential plant type with higher photosynthetic rate, leaf area and greater biomass.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1998.10a
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• pp.82-87
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• 1998

단고추의 자루재배에 의한 양액재배시 $NO_3$$^{-}$ 와 $NH_4$$^{+}$의 비율을 8:2와 10:0으로 하였을 때, 배지 종류에 따른 생육, 수량 및 무기성분 흡수에 미치는 영향을 구명하기 위하여 실험한 결과는 다음과 같다. 1. 배지의 무기성분 중 P 및 Mg는 버미큘라이트+왕겨에서, K는 펄라이트+버미큘라이트에서 높았다. 배지내 Ca의 농도가 가장 높았으며, 8:2보다 10:0에서 배지내 무기성분의 농도가 높았다. 2. $NO_3$$^{-}$ : $NH_4$$^{+}$ 비율에 따른 양액의 pH 및 EC는 모든 배지에서 작물재배에 적합한 범위를 유지하였으며, pH는 10:0에서 더 안정적이었고, EC는 8:2에서 높게 유지되었다. 3. 초장과 경경은 배지에 따른 생육차가 없었으며, 옆면적은 버미큘라이트+왕겨에서, 생체중, 건물중 등은 피트모스+훈탄에서 무거웠다. 생육은 $NH_4$$^{+}$를 첨가한 8:2의 모든 배지에서 10:0에 비하여 증가하였다. 4. 8:2에서의 과수 및 수량은 버미큘라이트+왕겨에서 17.53개와 1,5889으로 많았으며, 10:0에서의 과수는 버미큘라이트+왕겨에서 16.44개로, 수량은 필라이트+피트모스에서 1,394g으로 많았다. 8:2의 모든 배지에서 10:0에 비하여 과수, 수량, 평균과종, 과경, 과장 및 상품과율 등이 증가하였다. 5. 무기성분은 8:2와 10:0의 경우 $K^{+}$는 잎과 줄기에서, $Ca^{2＋}$ 는 뿌리에서, $Mg^{2＋}$ 는 잎에서 많았으며, $PO_4$$^{-}$ 는 과실과 줄기에서 많았다. 배지간에 따른 차이는 나타나지 않았으며, $K^{+}$, $Ca^{2＋}$ 및 $Mg^{2＋}$ 는10:0에서, $PO_4$$^{-}$ 는 8:2에서 각각 많았다.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2023.04a
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• pp.26-26
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• 2023

포스트 코로나 이후 먹거리에 대한 소비자의 인식전환으로 건강먹거리인 야콘에 대한 관심이 증가하고 있다. 야콘은 남미 안데스에서 도입된지 40여년 되었으며 달콤한 맛과 아삭아삭한 식감을 가져 생식용과 야콘즙으로 인기있으나 현재 국내 육종된 품종이 없다. 따라서, 다양한 유전자원을 확보하고 자원에 대한 평가를 통해 신품종 육성을 위한 기초 자료로 활용하고자 실시하였다. 연구에 사용된 재료는 국립식량과학원에서 보유하고 있는 5개 자원을 대상으로 초장, 엽수, 줄기수, 생체중, 관아수량, 괴근수량 등을 조사하였으며, 조사방법은 농촌진흥청 농업과학기술 연구조사 분석기준(RDA, 2012) 준하였다. 야콘 유전자원의 지상부 특성 결과, 초장이 92-127cm 범위를 보였으며, 줄기수는 8-12개, 경엽중은 1,433-2,855kg, 엽수는 152-195개의 범위를 보였다. 또한, 유전자원별 지하부 특성을 살펴보면, 유전자 원별 HY1이 관아수가 가장 많고, 관아수량도 352/10a으로 가장 무거웠다. 괴근수량을 살펴보면, HYL2가 총수량이 5,197 kg/10a, 상품수량이 4,213 kg/10a으로로 가장 많았으며, HYL3, HYL4, HYL5, HYL1 순이었다. 유전자원의 생리장해 결과를 조사한 결과, 열근 및 부패발생은 HYL1이 가장 심하였으며, HLY5가 상대적으로 약했다. 유전자원의 품질특성을 조사한 결과, 당도는 HYL5가 12.5로 가장 높았으며, HYL1이 8.7로 가장 낮았다. 이상의 결과를 바탕으로, 향후 야콘의 인공교배 단계에서부터 육종프로그램에 활용할 계획이다.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 2002.11a
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• pp.216-221
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• 2002

물리적 스트레스는 식물의 성장과 형태형성 반응에 커다란 영향을 미치는데 14일 동안의 Brushing은 무의 기근율을 감소시켰고, 그 결과 타원형의 품질의 우수한 Radish root을 생산할 수 있었다(Latimer 1991). 그 외에도 상치, Cauliflower celery 묘의 내서성을 향상시킬 뿐아니라, 감자의 생체중과 건물중을 감소시킨다는 보고도 있다(Akers and Mithchell, 1985). (중략)

• KOREAN JOURNAL OF CROP SCIENCE
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• v.29 no.2
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• pp.157-174
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• 1984

Four different levels of nitrogen were applied to 3 naked barley cultivars (Hordeum vulgare L.) Yonezawa, Baekdong and Yeongsanbori. Changes in chlorophyll content, green leaf area and light penetration were monitored after heading. Yield and its components were examined upon these changes. Increased level of N-application delayed the days to heading and ripening by 2-3 and 6-7 days, respectively, in Yonezawa. Yonezawa with a short culm was more resistant to lodging than two tall ones (Baekdong, Yeongsanbori) under heavy nitrogen applications. Yield was affected mostly by the number of spikes per unit area and 1, 000 grain weight at all levels of N-applications. The increase in dry weight of Baekdong was more than in that of Yonezawa. A sharp increase in dry weight was observed after 3 weeks of heading. Maximum yield was obtained at $N_2$ in Yonezawa (234kg/10a) and Baekdong (302kg/10a) and at $N_1$ in Yeongsanbori (332kg/10a). It appears essential to attain the sufficient leaf area and the increase in chlorophyll content for maximum yield. However, too much leaf area at the highest N level up to the ripening stage was not beneficial for dry matter production.

• Korean Journal of Environmental Agriculture
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• v.29 no.2
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• pp.109-114
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• 2010

Rape residue as green manure is an emerging alternative of chemical fertilizer to improve soil quality and crop productivity. Objective of this research was to evaluate the effectiveness of rape residue as green manure on reduction of chemical fertilizer and suppression of weed occurrence in rice-rape double cropping system. Greenhouse experiment was conducted with four treatments: the combination of rape residue and three different N application rates (0, 30 and 70% of recommended application rate (7.8 kg N $10a^{-1}$)) and 100% chemical fertilizer as a control. No difference in rice clum length was observed for all treatments, while panicle length was highest in a treatment of rape residue+70% chemical fertilizer (Rape+70%CF). In addition, rice grain weight at a Rape+70%CF treatment increased by 19% compared to the control. This treatment also reduced weed density and biomass by 58 and 53%, respectively, compared to the control. Our results suggest that use of rape residues as green manure is an environment friendly and effective way to reduce chemical fertilizer and to enhance crop productivity in rice-rape double cropping system in Korea.