• Korean Journal of Agricultural Science
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• v.14 no.2
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• pp.232-247
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• 1987

Three rice varietis, Dongjinbyeo, Daecheongbyeo and Chucheongbyeo, which are leading cultivars in the Chungnam area, were planted to determine their effects of mixture on the plant characteristics and the blast occurrence. The summary obtained is as follows; 1. The heading dates of each cultivars were not affected by the mixing culture. Only a day was delayed in heading date of Chucheongbyeo under commonly standard fertilizer level. 2. The effects of cultivar mixture on the plant height was high when low level of fertilizer were applied. Of the cultivar mixture, the mixing of Dongjinbyeo and Daecheongbyeo shoed 5.1% of plant height increase. The effects of mixture on the tillering number were apparent only under the standard fertilizer level. The mixture of Dongjinbyeo and Chucheongbyeo was effective in increasing the tillering number up to 5.7% over mean tillering number of each cultivars. 3. The stem height tended to increase as the fertilizer level increased and the effects of cultivar mixture on the stem height was high. The stem height of mixture of Dongjinbyeo and Daecheongbyeo was highest compared with other mixture cropping. On the contrary, the panicle length was shortened as the fertilizer level decreased and cultivars were mixed. Among the cultivar mixtures, the mixture of Dongjinbyeo and Daecheongbyeo showed the most effectives of increasing the panicle length. 4. The total dry weight of mixed and pure cultivars were compared. The mixture of two cultivars was effective in increasing the dry weight of rice upto 3.5% over the average of dry weight of each cultivars. When three cultivars were mixed, there were 8.5% of dry weight increase over not mixed cultivars. The effects of mixture on the dry weight were more apparent under standard fertilizer level. 5. The rates of Neck and Node and Branch Blast occurrence were reduced when cultivars were mixed, and their reduction rates were 11.7% and 14.0%, respectively. The occurrence of Blasts was also decreased under the lowest fertilizer level than the standard fertilizer level. The least Blast occurrence was obtained when Dongjinbyeo and Daecheongbyeo were mixed cropped. 6. Significantly high number of spikelets of per square meter was observed when Chucheongbyeo and Dongjinbyeo were mixed. However, the spikelets of panicle were the lowest when Chucheongbyeo and Dongjinbyeo were mixed. The number of panicles per square meter was increased as the fertilizer levels increased, while the number of spikelets per panicle increased as the fertilizer level decreased. 7. The effects of mixture on the maturing were apparent regardless of the fertilizer level. The 1000 grain weight was higher when lower level of fertilizer was applied. The effects of cultivar mixture on the 1000 grain weight were more apparent in the plots of Chucheongbyeo and Dongjinbyeo mixture and three cultivar mixture. 8. The grain yield increased when cultivars mixed. The increment under mixing cropping was 4.6% over mono cropping. The effects of cultivar mixture on the yield increase were more apparent under lower levels of fertilizer application. The highest yield increase was obtained when Chucheongbyeo and Daecheongbyeo were mixed, and the rate of yield increase was 6.8% over mono-cropping. 9. The grain yield was highly correlated with number of panicles per square meter and dry weight. There was not any significant relationships found among grain yield, spikelets of panicle and ripening percentage.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.32 no.1
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• pp.24-33
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• 1987

Competitive ability and response of grain yield in a mixed cropping of two cultivars having different agronomic traits were evaluated at the Yeongnam Crop Experiment Station in 1984 and 1985. Competitive ability was higher in Indica x Japonica cultivar, Milyang 23, and tall statured cultivar, Samgang-byeo, than in Japonica type cultivar, Nacdongbyeo, short statured type cultivar, Taebaegbyeo, respectively. Compared to pure stand, more grain yield was recorded when mixture rates were over 50% in a seed volume for the mixing rate of high yielding cultivar in two cultivars, but low compared to pure cultivation of the cul-tivar having the higher yielding ability in two cultivars.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.10a
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• pp.81-81
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• 2018

곤달비는 국화과에 속하는 대표 산채로 쌈용으로 많이 소비되고 있다 곤달비를 경관농업의 소재로 6차산업화하기 위한 친환경 생산기술을 개발코자 하였다 곤달비의 재배 중 흰가루병 발생은 가장 큰 문제로 자생식물과의 혼식을 통해 병의 진행 억제효과를 구명코자 하였다 천궁과 당귀를 곤달비와 함께 인공상토로 채운 화분에 1주씩 혼식하였고 곤달비만 심은 대조구를 두었다 흰가루병 접종은 포자를 곤달비에 발생시킨 후 접종하였다 약 7일의 흰가루병 발생기를 거친 후 6월 4일~6월 21일까지 2~3일 간격으로 진행률을 조사하였다 조사결과는 병의 진행률을 계량하기 위해 효율적인 AUDPC(Area Under the Disease Pogress Curve) 방법을 적용하여 분석하였다 천궁 당귀와 혼식한 결과는 곤달비의 흰가루병은 동시에 발생하였다 곤달비만 심은 대조구는 병 발생 후 5일 간 가파르게 증가하였으나 천궁과 당귀와 혼식 처리구는 완만한 증가세를 보였다 6월 21일의 AUDPC 수치와 비율은 대조구가 602.3(1.00), 천궁 혼식구가 265.8(0.53), 당귀 혼식구는 226.1(0.45)로 혼식구가 대조구에 비해 50% 이하의 진행률을 나타냈다 통계처리 결과 대조구와 혼식구 간 1%의 유의성을 나타냈다 당귀가 가장 높은 억제율을 보였으며 이러한 원인에 대한 추가 분석이 요구된다.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.6 no.5
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• pp.21-27
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• 2003

Five warm-season turfgrass [Zoysia japonica Steud., Stenotaphrum secundatum (Walt.) Kuntze, Buchloe dactyloides (Nutt.) Engelm., Eremochloa ophiuroides (Munro.) Hack. and Cynodon dactylon (L.) Pers.] were overseeded with 2 cool-season turfgrasses [Poa pratensis L. and Festuca arundinacea Schreb.] to examine suitability of these species for planting in mixture for producing a year-round turf. Percent of warm-season and cool-season turfgrasses in the mixture were estimated for 5 years. Also, to evaluate the fertilization times of the warm-season and cool-season turrfgras mixtures. Eremochloa ophiuroides and Buchloe dactyloides were not suitable for warm-season and cool-season turfgrass mixtures. However, Zoysia japonica, Stenotaphrum secundatum and Cynodon dactylon were suitable for warm-season and cool-season turfgrass mixtures. Zoysia japonica, Stenotaphrum secundatum and Cynodon dactylon were showed approximately 50% botanical composition five years after cool-season turfgrass overseeding. And, those three warm-season turfgrass mixtures showed approximately 20% visual ratings in winter period. Fertilization in early spring and late autumn had made cool-season turfgrass dominated in mixtures. Therefore, fertilization times in warm-season and cool-season turfgrass mixtures was desirable in summer period.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.4 no.1
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• pp.73-79
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• 1968

In order to investigate varietal competition effects on yield of rice, two experiments were conducted under paddy field condition. In experiment I, two leading varieties were grown in pure and mixed stands and examined the influence of spacings and nitrogen levels on the varietal competition effects and competitive ability of two varieties. In experiment II, three leading varieties were grown in pure and mixed stands with different combinations and examined the competition effects on yield in different combinations. The results are summarized as follows: 1. No significant differences were found in grain yield between varietal mixture and pure stands, though the level of nitrogen and spacings affected plot yield. 2. In the mixture of Suwon ＃82 and Shin ＃2, Suwon ＃82 appeared to be a better competitor to the Shin #2 in terms of grain yield. 3. The performance of mixtures were determined by the balance of the increment of better competitor and the decrement of poorer competitor. Here, the increment of Suwon ＃82 due to competition did not much exceeded the decrement of Shin ＃2. 4. Spacings and Nitrogen levels, tested here, did not affect significantly to the varietal competition effects. 5. Jaekun, Paltal and Norin ＃6 showed no varietal difference in competing ability.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.04a
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• pp.58-58
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• 2018

'다목이'는 일반 곰취를 모본으로 한대리곰취를 부본으로 교배하여 병에 강하고 수량성이 뛰어난 특성을 가진 곰취 신품종으로 고령지농업연구소에서 육성하였다. 경관농업은 청정 농산물의 생산, 가공과 서비스가 연계된 농업의 6차산업화를 대표하는 농업형태이다. 곰취를 이용한 산채류 경관농업을 구현하기 위해 '다목이'와 자생식물의 혼식을 통한 친환경 생산기술을 개발코자 하였다. 인공상토로 채운 화분에 곤달비와 삼백초, 백리향, 라벤더 등 국내 외 자생식물을 혼식하여 각 식물의 지상부와 지하부 생육을 조사하였다. 삼백초, 라벤더, 이질풀, 웜우드, 어성초는 '다목이'와 혼식하여 지상부 생체중 214.1~362.4g, 지하부 생체중 171.0~258.5g으로 생육이 대등하거나 양호한 결과를 보였다. 반면에 생강과 박하는 '다목이'의 생육량을 지상부 생체중 90.9~123.6g, 지하부 생체중 54.0~110.3g으로 현저히 감소시켰다. 백리향과 좀씀바귀, 제충국, 옥잠화는 '다목이'에 의해 생육이 극도로 저하되거나 고사하였다. 배초향은 '다목이'와 서로의 생육이 감소된 것으로 나타났다. 따라서 '다목이'와의 혼식은 경관농업의 목적에 따라 삼백초, 라벤더, 이질풀, 웜우드, 어성초가 적합한 것으로 생각되었다.

• Korean Journal of Environmental Biology
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• v.38 no.1
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• pp.197-205
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• 2020

With the purpose of designing companion planting of groundcover plants for ornamental uses, this study identified the yearly growth characteristics of nine species of different life forms, analyzed the coverage characteristics of individual plants, and suggested combinations of plants suitable for each life form. Polygonatum odoratum var. pluriflorum, Liriope platyphylla and Hosta capitata, as short-grained plants that can grow to more than 20 cm, tended to grow for 60 days after planting in April and maintain their shape thereafter. Their aerial parts started to wither and enter dormancy after September. Saxifraga stolonifera, Dianthus chinensis and Sedum middendorffianum tended to continuously grow until September after planting in April and their growth declined after September. Lysimachia nummularia, as a creeping plant that grows creeping on the ground, started to show a rapid growth three months after planting. Sedum sarmentosum grew slowly until August and the aerial parts started to wither from September when the temperature decreases. The coverage characteristics of these nine species that grow differently after companion planting were surveyed and the growth of Sedum sarmentosum showed the highest number of companions. It was found that Hosta capitata can be companion planted with Sedum middendorffianum, Saxifraga stolonifera, and Lysimachia nummularia. These results indicate that among different shoot growth types species propagated with their stems creeping on the ground or those that can grow vegetatively with non-rhizome parts are more suitable for companion planting with others than those of which rhizomes branch.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.6 no.5
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• pp.40-47
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• 2003

This study examined the improved effect of wear tolerance of warm-season turfgrass overseeded with cool-season turfgrasses. Also, it investigated the improved effect of crumb rubber on wear tolerance and the difference anmong cultivars regarding the wear of Zoysia spp. In wear experiment during summer, the warm-season turfgrass overseed with cool-season turfgrasses had a higher visual rating on the ground than the monostand of Cynodon dactylon. Moreover, in wear experiment in winter, barrenness showed significant progress in the monostand of C. dactylon, while the barrenness did not appear at all in overseeded turf with cool-season turfgrasses. As a result of investigating the bulk density was increased in the monostand of C. dactylon, but not in the overseed turf with cool-season turfgrasses. From the above result, the wear tolerance effcect of turfgrasses appeared year round through warm-season and cool-season turfgrass mixtures. Also, it was found that the method of topdressing crumb rubber on the ground was effective as a physical assistant device alleviating damage of turfgrasses. The possibility of improving wear tolerance was accepted by adding soil amendments such as perlite, pamis, etc., in order to promote the growth of turfgrass.

• Journal of Nutrition and Health
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• v.2 no.2
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• pp.69-70
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• 1969

• The Korea Swine Journal
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• v.6 no.3 s.55
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• pp.125-125
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• 1984