• Title, Summary, Keyword: 생태형

Search Result 1,639, Processing Time 0.05 seconds

Effect of Different Planting Dates on Growth and Yield Component in Two Ecotypes of Soybean (생태형이 다른 콩의 파종기가 생육 및 수량구성요소에 미치는 영향)

  • 주용하;정길웅;주문갑
    • KOREAN JOURNAL OF CROP SCIENCE
    • /
    • v.41 no.1
    • /
    • pp.86-94
    • /
    • 1996
  • This experiment was carried out to investigate the differences of the growth and yield characteristics at different planting dates in two soybean ecotypes from 1993 to 1994. Two summer types of soybean varieties, Suwon 163 and CNS 342, and two autumn types, Hwangkumkong and Keomcheongkong #1 were planted 7 times from 22 April to 21 June with 10 days interval in 1993 and 4 times from 22 April to 21 June with 20 days interval in 1994 at experimental field, Dankook University, Cheonan. Emergence rate was shown to difference between the summer types and the autumn types, as planting date delayed and between 1993 and 1994. The average emergence period was more shortened in 1994 than 1993. This was reduced as planting date delayed. Days to flowering, pod formation and maturity were shortened as planting date delayed, and observed that shortening of days to flowering and maturity were smaller in the summer types than the autumn types. Stem height, stem diameter, number of mainstem nodes, number of branches and number of branch nodes were different between the summer types and the autumn types and between 1993 and 1994. These were reduced as planting date delayed. The number of pods per plant was also different between 1993 and 1994, and reduced as planting date delayed. The number of seeds per pod was not different between 1993 and 1994, and shown to similar tendency as planting date delayed. It was observed that one hundred seed weight of the summer types were reduced, but the autumn types were not as planted date delayed in 1993. In 1994, one hundred seed weight was not measured because almost all pods were unfilled or shriveled probably due to high temperature during pod formation period. The rate of unfilled pods per plant was higher the autumn types than in the summer type of soybeans in 1994.

  • PDF

A Report on Mixed Occurrence of Tobacco Whitefly (Bemisia tabaci) Biotypes B and Q in Oriental Melon Farms in Kyungpook Province, Korea (담배가루이 생태형 B와 Q가 같이 발생하는 경북 참외재배 지역 보고)

  • Kim, Eunsung;Kim, Yonggyun
    • Korean journal of applied entomology
    • /
    • v.53 no.4
    • /
    • pp.465-472
    • /
    • 2014
  • The tobacco whitefly, Bemisia tabaci, infest the Oriental melon and give significant economic damage along with its virus-vectoring activity. Various biotypes of B. tabaci have been well known and are classified depending on the severity of crop damage and insecticide susceptibility. In this study, B. tabaci adults were collected in the melon fields located in Poongchun-myeon, Andong, Korea and diagnosed on their biotypes using PCR molecular markers. From the all the 11 greenhouses, B. tabaci biotype Q was identified. In addition, biotype B adults were also found from the 4 greenhouses. These results report the first occurrence of B. tabaci at the Oriental melon farms in Gyeongbuk province with mixed infection by the two biotypes in the area.

Classification of Ecotypical and Maturing Groups of Perilla varieties (들깨 품종의 생태형과 성숙군의 분류)

  • Ik-Sang Yu;Eun-Woong Lee
    • KOREAN JOURNAL OF CROP SCIENCE
    • /
    • v.14
    • /
    • pp.133-137
    • /
    • 1973
  • In order to classify the ecotypical and maturing groups 136 Korean local and 4 Japanese Perilla varieties were sown at Suwon on May 20, 1972, and investigations were made on days to flowering, days to maturing and growth duration. Results obtained were summarized as follows: 1. Ecotype was classified from 6 groups with combination of the long and short duration from sowing to flowering and maturing period. The classified symbols of groups were Ia, Ib, IIa, IIIa, and IIIb. I: long duration. to flowering II: medium duration to flowering III: short duration to flowering a: long duration to maturing b: short duration to maturing Korean local varieties were distributed 3 ecotypes of IIa, IIb and IIIa, however, Japanese varieties did 2 ecotypes of IIa and IIb, respectively. 2. Maturing group was classified from 3 groups with long (I), medium (II), and short (III) growth durations. Korean local varieties belong to II and III groups but Japanese varieties belong to I and II groups, respectively. 3. Three were highly significant positive correlation (0.685) between ecotypical and maturing group. Ecotype was more related with days to flowering and growth duration, however, maturing group was related with days to flowering, days for maturing, and growth duration. Korean local varieties, more distributed into ecotype than maturing group, were attributed to differences of environmental conditions and cultural practices at different provinces.

  • PDF

What Is to Be Done with Creative Ecosystem Based on Creative Economic Innovation Center: An Implication through Comparing Silicon Valley and Kyoto Eco-system (창조경제혁신센터형 창조생태계 어떻게 할 것인가?: 실리콘 밸리 및 교토생태계와의 비교를 통한 시사점)

  • Lee, Hong
    • Journal of Technology Innovation
    • /
    • v.25 no.4
    • /
    • pp.145-164
    • /
    • 2017
  • This research targeted discussions on re-utilization of Korean creative economic innovation center. It is meaningless to simply discuss its re-organization. The focus of this study was to find a way that transforms it into totally new one. The study followed several steps. First, it delineated criteria from existing literature for comparing creative eco-system of Silicon valley, Kyoto eco-system and eco-system based on Korean creative economic innovation center. Second, it compared the three eco-systems in details. Third, it discussed a direction for transforming eco-system based on Korean creative economic innovation center. It was suggested that the Kyoto eco-system can be a role model. It was also suggested that governmental role should be changed from controller to facilitatior which stimulates regulation relaxations and helps to establish market formation.

Preference, Development and Fecundity of the Brown Planthopper(Nilaparvata lugens St${\aa}$l) Biotypes Fed on Different Cultivars of Rice with Various Resistance Gence (벼의 품종저항성이 벼멸구 각 생태형의 선호성, 발육 및 증식능력에 미치는 영향)

  • 박영도;송유한
    • Korean journal of applied entomology
    • /
    • v.27 no.2
    • /
    • pp.87-93
    • /
    • 1988
  • Some attempts were made to investigate the biological characteristics of the brown planthopper(BPH), Nilaparvata lugens St${\aa}$l, biotypes in terms of perference in feeding oviposition on rice field, egg and nymphal periods, egg hatchability, emergemce ratio, growth index, adult lingevity and gecundity fed on 60-day-old rece cultivaes with different resistance genes. Feeding and oviposition perference of the three BPH biotypes on Dongjinbyeo with no resistance gene were shown very higher than on rice cultivars with resistance genes. Those of biotype-2 on Cheongcheongbyeo with bph 1 gene and bitype-3 on Milyang 63 with bph 2 gene were relatively high, however, they were still remarkably lower than those of Dongjibyeo. The egg and nymphal periods of the three BPH biotyes on Milyang 23 were shorter than on the other rice cultivars. The periods of biotype-2 on Cheongcheongbyeo and biotype-3 on Milyang 63 were as short as those of the three BPH biotypes on Milyang 23. The egg hachability, emergence ratio, and growth index of the three BPH bioyoes on Milyang 23 were higher than on the other rice cultivars and those of biotype-2 on Cheongcheongbyeo and biotyoe-3 on Milyang 63 were as high as on Milyang 23. The female adult longevity of the BPH biotype-1 on Milyang 23 was longer than on the other cultivaes, and that of biotype-2 on Cheongcheongbyeo and bioty-3 an Milyang 63 were as ling as on Milyang 23. The number of egg laid by a female of the three BPH biotypes were greatly increased on Milyang 23. Those of biotype-2 on Cheongcheongbyeo and biotype-3 an Milyang 63 were also greatly increased.

  • PDF

Categorization of Citiesin Gyeonggi-do Using Ecosystem Service Bundles (생태계서비스 번들을 이용한 경기도 도시의 유형화)

  • Kim, Ilkwon;Kim, Sunghoon;Lee, Jooeun;Kwon, Hyuksoo
    • Journal of Environmental Impact Assessment
    • /
    • v.28 no.3
    • /
    • pp.201-214
    • /
    • 2019
  • The concept of ecosystem services is important for the effective management of regional ecological resources. Multiple ecosystem services provided by regional ecosystems are represented as ecosystem service bundles, which define the co-occurrent ecosystem services in a specific region. Bundles provide useful information to identify regional characteristics of ecosystem services and categorize sub-regions with similar patterns of ecosystem service provision. We assessed eleven ecosystem services using modeling approaches and statistical data and produced bundles of cities in Gyeonggi-do.We also conducted principal component analysis and cluster analysis to categorize these cities according to the characteristics of ecosystem services. The results indicated that the cities in Gyeonggi-do were categorized into three groups depending on the types of provision,regulation, and cultural services, and were designated as urbanized, urban-forest, agriculture, or forest cities. These groups were influenced by land use patterns reflecting regional social-environmental features. The results provide useful information for identifying regional ecosystem services and facilitate decision-making in regional ecosystem service management.

Differences of the Honeydew Excretion in Growing Characteristics of the Brown Planthopper, Nilaparvata lugens Stal, Biotypes on Different Cultivars of Rice with Various Resistance Genes (벼멸구 생태형의 성장 특성별 감로 배설량의 차이)

  • 최주수;박영도
    • Journal of Life Science
    • /
    • v.9 no.2
    • /
    • pp.121-126
    • /
    • 1999
  • Some attempts were made to investigate the honeydew excretion of the brown planthopper(BPH), Nilaparvata lugens Stal, biotypes in terms of instal nymph, days after emergence, macropterous and brachypterous mated and unmated female, and macropterous female with different sources fed on 60-day-old rice cultivars with different resistance genes. The feeding amount of the BPH biotypes was measured by using the honeydew excretion test. The feeding amount of fifth instar on Miryang 23 with no resistance gene was higher than that of Cheon-gcheongbyeo with Bph-1 gene by two times. Macropterous and brachypterous females showed low feeding amount at first day after emergence, but they showed high feeding amount from second days after emergence. Also the feeding amount of brachypterous female was higher than that of macropterous female. In addition, the feeding amount of BPH was in the order of nymph

  • PDF

Varietal Resistance of Rice to the BPH Biotypes 1, 2, 3 and their Hybrid Progenies, Nilaparvata lugens $St{\aa}l$ (I) (벼멸구 생태형(生態型)의 교잡종(交雜種)에 대(對)한 수도품종(水稻品種)의 저항성(抵抗性)에 관(關)하여(I))

  • Kim, Jeong-Wha;Youn, Sang-Won
    • Korean journal of applied entomology
    • /
    • v.26 no.2
    • /
    • pp.63-69
    • /
    • 1987
  • This study was performed to evaluate the resistance of three different rice cultivars to the BPH biotypes 1, 2, 3 and their hybrid progenies, Nilaparvata lugens STAL. The rice cultivars tested were Chucheongbyeo, Cheongcheongbyeo and Milyang 63. The following characteristics of hybrid progenies were compared with these of their parents: Seedling response, Host preference, feeding amount, Esterase polymorphism of the brown rice. According to the responses of rice seedlings to the three BPH biotypes and their crosses progenies nymph, Chucheongbyeo was shown highly susceptible to their nymphs. The Cheongcheongbyeo was susceptible to the biotypes 2 and the Milyang 63 was susceptible to the biotype 3. The Cheongchengbyeo and the Milyang 63 were moderate to the biotypes 2(female)${\times}$3(male) and 3(female)${\times}$2(male). The preference in feeding and oviposition of three BPH biotypes and their hybrid progenies to Chucheongbyeo were shown higher than to another cultivars. The two preference were not only shown highly in Cheongcheongbyeo by the biotypes 2,2(female)${\times}$3(male) and 3(female)${\times}$2(male) but also in Milyang 63 by the biotypes 3,2(female)${\times}$3(male) and 3(femlae)${\times}$2(male). The feeding amount of female adult was much on three BPH biotypes and their hybrid progenies in Chucheongbyeo and on the biotypes 2 and 3(female)${\times}$2(male) in Cheongcheongbyeo, On the biotypes 3 and 3(female)${\times}$2(male) in Milyang 63 were as same as the above. The esterase bands of Est ${\alpha}-1,\;{\beta}-4,\;{\beta}-5\;and\;{\beta}-I$ were detected on brown rice of all the tested cultivars. The bands of Est ${\beta}-2\;and\;{\alpha}-I$ were detected on Cheongcheongbyeo (Bph 1 gene for resistance) and Milyang 63 (bph 2 gene for resistance). The Est ${\beta}-3\;and\;{\beta}-1$ of esterase bands were detected on Chucheongbyeo.

  • PDF