• 한국작물학회지
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• 제43권1호
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• pp.28-31
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• 1998

Nodule development was regulated partially by host plant factors originating in the shoots and roots. This study was performed to identify the origin of the factors regulating nodulation in supernodulating soybean (Glycine max [L.] Merr.) mutant 'SS2-2' which was isolated recently from ethyl methanesulfonate (EMS) mutagenesis of 'Sinpaldalkong 2'. Self- and reciprocal-grafts were made among three soybean genotypes which consisted of two supernodulating mutants, SS2-2 and 'nts 382', and a normal nodulating Sinpaldalkong 2. Self-grafted supernodulating mutants were characterized by greater nodule number, nodule dry weight, and $C_2$H$_2$ reduction activity than self-grafted wild types. They were also characterized by relatively higher nodule to root dry weight. Significant shoot genotypic effects were observed on nodule number, nodule dry weight, and $C_2\;H_2$ reduction activity per plant, whereas varying root genotypes had no effects. From this result, it is surmised that supernodulating characters are controlled by a graft-transmissible shoot factor, and mutant SS2-2 may have similar nodulation mechanism to the former supernodulating nts 382. In all grafts, both supernodulating mutants and Sinpaldalkong 2 maintained the similar balance between above ground and below ground parts regardless of significant differences in partitioning of dry matter into root and nodule between supernodulating mutants and Sinpaldalkong 2.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2004년도 춘계 학술대회지
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• pp.102-103
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• 2004

[ $\bigcirc$ ] In the growth simulation without changing of module with ORYZA2000, dry matter, LAI and leaf nitrogen content(FNLV) were estimated well under high nitrogen applicated condition, but overestimated under low nitrogen applicated condition. $\bigcirc$ Nitrogen stress factor on the SLA was introduced into ORYZA2000 because especially overestimated LAI under low nitrogen applicated condition was originated from SLA decrease with leaf nitrogen(FNLV) decrease. $\bigcirc$ In the growth simulation with modified SLA modified module, LAI was estimated well under even low nitrogen applicated condition, but dry matter was hardly changed compared with default. $\bigcirc$ Simulated plant nitrogen content and dry matter have no clear difference between modules, but compared with observed values, panicle weight(WSO) and rough rice yield(WRR14) were overestimated under high nitrogen applicated because of lodging, pest, disease and low nitrogen use efficiency.

• 한국연초학회지
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• 제16권1호
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• pp.34-42
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• 1994

Experiments on the variability of plant type and factors representing the productivity and quality of the cultivars were subsequently carried out in relation to different plant density. Results are summarized as below. The higher was the plant density, the greater was the plant height and mean leaf inclination(MLI). As the plant density increased, the horizontal leaf area distribution became greater in proximal to the stem in NTN 77 and Br.49 but evenly in distal part in Br.21. Meanwhile, in terms of vertical leaf area distribution, it was decreased much more in middle and lower leaves than in upper in NTN 77 and Br.49 although it steadily decreased in any part of the plant in Br.21. Br.49 was the largest but Br.21 and NTN 77 were similar with respect to both CGR and NAR. The yield was greater in larger MLI cultivars(NTN 77>Br.49>Br.21). These three characteristics became greater when the tobacco were planted more densely in the field. Dry leaf weight and dry matter weight per plant were heavier in the larger MLI and increased with lower plant density. Total nitrogen content was greater in lower plant density and larger MLI cultivar. The plant density increases filling power seems to be enhanced regardless to the plant type. There was no discernible tendency on combustibility according to the plant density or plant type.

• 한국자원식물학회지
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• 제12권2호
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• pp.120-124
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• 1999

삼백초의 생육 특성을 구명하여 체계적인 재배기술을 확립하기 위한 기초 자료를 얻고자 실험을 수행한 결과를 요약하면 다음과 같다. 1. 지상부 생육은 정식 후 165일에 최고에 이르렀고, 건물율 및 엽면적지수 (LAI)도 29%와 4.04로 가장 높게 나타났다. 2. 근경의 생육은 정식 후 165일까지 꾸준히 증가 하였고, 이후는 둔화되는 경향 이었다. 3.근경의 건물중은 정식 후 180일에 961g/m$^2$로 가장 높았고, 건물율은 정식 후 150일에 26%에 이르렀으며, 이후는 증가되지 않았다. 4. CGR, RGR및 NAR는 정식 후 150일에 높았고, 정식 165일 이후는 CGR 및 RGR의 증가량이 둔화되었으며, NAR는 감소되었다.

• 한국초지조사료학회지
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• 제12권1호
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• pp.67-70
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• 1992

The experiment was conducted to evaluate the effect of the different seeding date on the dry matter yield and chemical composition of oat for forage. The crops wrc sccdcd on August 3l(lirst). Scptember IO(second). and September 20(third seeding date) and were taken on November 24, 1991. The results are summarized as follows : 1. The plant heights were 68, 54 and 40 cm at first, second, and third seeding date, respetively. 2. Dry matter (DM) content decreased with delaying seeding date from first to third seeding date. DM varied from 18.6 to 14.9 %. 3. Leaf weight ratio increased with delaying seeding date from first to third seeding date, varied from 51 to 67 %, but stems decreased from 49 to 33 %. 4. The dry matter yields per ha decreased with delaying seeding date: it was 5.670. 3.960 and 2.310kg at first, second and third seeding date. Significant differences has been obtained among date(P<. 05). 5. The content of crude protein increased with delaying seeding date from first to third seeding date. varied from 16.3 to 22.6%. but NDF and ADF content decreased.

• 한국작물학회지
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• 제35권2호
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• pp.117-121
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• 1990

단옥수수의 수량을 상품성 있는 이삭수, 이삭무게, 이삭크기별 시장가격을 적용한 조수입으로 평가하였을 때 이들 수량평가방법의 결과를 비교하기 위하여 단옥수수 품종 Golden Cross Bantam 70을 재식밀도(5,000, 6,000, 7,000, 8,000, 9,000주/10a)를 달리하여 0.3mm 투명 P.E. film 피복하에서 재배하였다. 출아후 30일과 44일에 초장과 분벽수를 조사하였고, 이삭조사는 출사후 25일에 수확하여 포엽을 제거한 후 이삭의 수, 크기, 무게를 조사하고 무게별 이삭수, 10a당 상품성 있는 이삭수, 이삭무게 조수입을 계산한다. 1. 초장, 간장, 착수고, 분벽수, 출사기는 재식밀도간에 차이가 없었으며, 수확기의 주간 엽면적지수는 1.1-1.9로서 재식밀도가 높을수록 증가하였다. 2. 상품성있는 이삭의 평균길이, 굵기, 무게와 포엽을 제거한 이삭무게가 150g 이상인 상품의 비율은 재식밀도가 높을수록 감소하였다. 3. 10a당 상품성있는 이삭수, 이삭무게 및 크기별 가격과 이삭수를 고려한 조수입은 재식밀도가 높을수록 증가하였으며, 이들간에는 고도로 유의한 정의 상관이있었다. 재식밀도가 높을때는 이삭수는 조수입보다 과대평가되었고, 이삭무게는 과소평가되었다. 4. 이삭을 수확한 후 경엽의 건물수량은 755-964kg/10a으로 7,000주/10a까지는 재식밀도가 높을수록 증가하였으며 건물함량은 20.7-24.5%이었다. 5. 흑조위축병 리병율은 10.6-15.0%이었으나 재식밀도간에는 차이가 없었다.

• Journal of Animal Science and Technology
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• 제47권3호
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• pp.355-362
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• 2005

This study was carried out to obtain basic information on variety selection for the utilization of whole crop rices(WCR) at National Institute of Crop Science, RDA, in 2004. Fifteen varieties and elite line were evaluated on feed value such as dry matter yield(DMY), crude protein( CP), acid detergent fiber(ADF), neutral detergent fiber(NDF) and total digestible nutrients(TDN). The dry matter yields were ranged from 13.23 to 17.83 ton per ha, the highest yielding varieties were Sobibyeo(l6.98ton / ha) in Japonica type, SR22060 (17.83 ton / ha) in New plant type, Hangangchalbyeo(I7.66 ton / ha) in Tongil type. Suweon 468 showed the highest value in the RFV and TDN content among the varieties, and Suweon 468, Suweon 498, Suweon 490 and SR22058 were chosen to have the high feed values through cluster analysis. The dry weight(grain) was found to be positively related with percent of the ripened grain, 1,000 grain weight and CPo TDN content was found to be positively related with CP, but negatively related with NDF and ADF. RFV was found to be negatively related with plant height, NDF and ADF. The promising rice varieties for WCR were Suweon 468, Suweon 498, Suweon 490 and SR22058 on the basis of CP, TDN and DMY.

• 한국초지조사료학회지
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• 제4권1호
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• pp.13-17
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• 1983

영양생장기(營養生長期)의 형태적(形態的)과 건물수량(乾物收量)과의 관계(關係)를 조사(調査)하여 수량(收量)에 관여(關與)되는 형태적(形態的) 형질(形質)과 품종(品種)의 특성(特性)을 비교(比較), 검토(檢討)하였다. 1. 개체중(건물중(乾物重))은 초장(草長), 엽면적(葉面積) 및 경면적(莖面積)과 유의(有意)한 정상관(正相關)을 나타내어, 개체중의 증가(增加)는 초장(草長), 엽면적(葉面積), 경면적(莖面積)의 상호작용(相互作用)이라고 할 수 있다. 2. 경면적(莖面積)은 건물중(乾物重)을 증가(增加)시키는 중요(重要)한 형태적(形態的) 형질(形質)의 하나라고 생각되었다. 3. 초형지수(草型指數)에 의하여 품종(品種)을 분류(分類)한 결과(結果), 경중형(莖重型)에는 M이 중간형(中間型)에는 Leto, First, Trader, 경수형(莖數型)에는 Bundy, Tammisto가 속(屬)하였다. 4. 경중형(莖重型) 품종(品種)은 초장(草長)이 낮고, 경수(莖數)가 적으나 경건(莖巾)이 두껍고 1 경중(莖重)이 무거웠으며, 경수형(莖數型) 품종(品種)은 초장(草長)이 크고 경수(莖數)는 많으나 1 경중(莖重)이 가벼운 특징(特徵)을 나타 내었다. 5. 경중형(莖重型) 품종(品種)(M)이 다수(多收)를 얻기 위해서는 경수(莖數)를 증가(增加)시키고 초장(草長)을 높게 하는 조건(條件)이 필요(必要)하다고 생각되었다.

• 한국작물학회지
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• 제28권3호
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• pp.379-385
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• 1983

옥수수 흑조위축병의 이병이 심한 남부평야지에서 사일리지 옥수수의 대체 작물을 개발하기 위하여 율무 2품종, 염주 2품종, 수수-수단그래스 교잡종 1품종(Pioneer-988), 옥수수 1품종(광옥)을 공시하여 사료생산성을 검토하고 또 조사료생산에 알맞는 율무와 염주품종의 생육특성을 비교 시험한 결과는 다음과 같다. 1. 한발로 인하여 발아가 지연되어 파종에서 출현까지 일수는 율무와 염주는 30-34일, 수수-수단그래스 교잡종은 18일, 옥수수는 19일이 소요되었다. 2. 생체수량은 율무와 염주를 개화후 40일에 1회 예취한 것과 개화기마다 2회 예취한 것 간에 차이가 없었으나 건물수량 및 가소화건물생산량은 개화후 40일에 1회 예취한 것이 2회 예취한 것보다 많았다. 3. 개화후 40일에 1회 예취한 율무 및 염주의 건물수량은 3회 예취한 수수-수단그래스 교잡종과 차이가 없었으나 옥수수보다는 건물수량이 높았으며 2회 예취한 율무 및 염주의 건물수량은 옥수수 보다 낮았다. 가소화건물생산량은 수수-수단그래스 교잡종이 가장 높고, 옥수수, 염주품종 1의 1회 예취가 그 다음이며 2회 예취한 율무와 염주의 가소화건물생산량이 가장 낮았다. 4. 율무와 염주의 초기생육 및 예취후 재생력은 수수-수단그래스 교잡종보다 현저히 낮았다. 5. 옥수수는 대부분이 흑조위축병에 이병되었고 간장, 수장, 수중, 건물수량 등은 현저히 감소되었다. 6. 율무와 염주 품종 중 사료생산에 알맞는 것은 포가 두껍고 종자가 구형인 염주품종이었으며 초장이 크며, 간경이 굵고, 엽신폭이 넓고, 생초 및 건물수량이 높고 엽신이 총건물중에 차지하는 비율이 커서 조사료생산에는 타 율무 및 염주품종보다 우수하였다. 7. 조곡수량은 율무 및 염주의 품종간에는 차이가 없었으나 염주 품종은 포가 두꺼워 정곡/조곡 비율이 현지히 낮아 정곡수량은 율무품종이 염주품종보다 현저히 높았다.

• 한국초지조사료학회지
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• 제8권1호
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• pp.47-54
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• 1988

The growth characteristics and yield per unit area of two cultivation systems of forage, corn (Zea mays L.) monoculture and corn-cowpea (Vigna sinesis King) inter-cropping were compared and obtained follow results. 1. The two cultivation systems were not significantly different in leaf length, leaf width and length of internode with harvesting time. 2. The weight of stalk and leaves of a plant were decreased with maturity, while weight of ear was markedly increased. The patterns of relative ratio of each components was essentially same in each cultivation system. In corn monocrop., the percentages of stalk, leaf and ear at final harvesting stage were 22.9, 13.7 and 63.4, respectively. 3. Dry matter yield per unit area (33kgIlOa) of intercropped corn at yellow stage was similar to that of monocropped corn ( l,482.8kg/ 10a vs 1 ,SO8.9kg/ 10a). At ripe stage, however, the DM yield of intercrop. was higher than that of monocrop. (1,810.4kg/lOa vs 1,660.4 kg/ 1 Oa). 4. The same pattern was observed in organic matter yield.