• Title/Summary/Keyword: Nursery bed

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Effect of Seedling Characters on talc Growth of Ginseng Plant in Fie1d I. Relationship between some seedling characters and growth of two-year-old ginseng plant (묘상의 소질이 본포에서의 생육에 미치는 영향 제 1보, 묘삼의 몇가지 특징적 형질과 2년근 인삼의 생육과의 관계)

  • 김종만;천성룡
    • Journal of Ginseng Research
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    • v.4 no.1
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    • pp.65-71
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    • 1980
  • Twin-bud seedlings and four-leaflet seedlings of ginseng were found and transplanted to field and their growth characteristics were investigated. 1. Appearance frequencies of twin-bud and four-leaflet seedlings were 0.3 and 0.4 percent, respectively, in common nursery bed: and were 6.6 and 28.4 percent, respectively, in polystem line. 2. Generally, the growth of twin.bud and four-leaflet seedlings were better than those of common seedlings both in aerial part and in root. Root weights of both type seedlings exceeded the common ones by 66 and 38 percent, respectively. 3. When they became two-year-old plants, leafiet number of common plant was 11.6, and those of twin-bud and four-leaflet-seedling plants were 18.1 and 13.8, respectively. There were no inflorescence in twin-bud-seedling plant, but the ratios of in florescent Plant in four-leaflet.seedling and common plant were 44.0 and 12.5 percent, respectively. 4. In two-year-old plant, root weights of twin-bud and four-leaflet-seedling plants were heavier than those of common ones by 27 and 20 percent, respectively.

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Effects of Organic Manure on Seedling Growth and Nodulation Capabilities of Five Popular Leguminous Agroforestry Tree Components of Bangladesh

  • Uddin, Mohammad Belal;Mukul, Sharif Ahmed;Hossain, Mohammed Kamal
    • Journal of Forest and Environmental Science
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    • v.28 no.4
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    • pp.212-219
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    • 2012
  • An experiment was set to understand the seedlings growth and nodulation capabilities of five potentially important leguminous agroforestry tree species of Bangladesh in response to application of organic fertilizer. Study was carried out in nursery bed on the seedlings of Acacia mangium Willd., Acacia hybrid, Acacia auriculiformis A. Cunn. ex Benth, Albizia lebbeck (L.) Benth. and Leucaena leucocephala (Lam.) de Wit. after sowing their seeds in polybags filled with different medium. Farmyard manure or decomposed cow dung was applied as the source of organic fertilizer with other potting media. The growth and nodulation performance of seedlings of the selected species were measured three moths after the first seed was emerged. The different soil: organic manure ratios' used during the experiment were, 1:1, 2:1 and 3:1. The effects of organic fertilizer on growth and nodulation were compared to that of seedlings grown in control. The results revealed a positive correlation between seedling growth and the different doses of organic fertilization (i.e. seedling growth was enhanced significantly with different treatments containing higher proportion of organic fertilizer). In few cases a negative effect was observed after applying higher levels of organic manure. It was also apparent that the nodulation in terms of nodule number and size was inhibited significantly by the application of organic fertilizer.

Effects of Mixed Plantation on Growth and Biomass Yield of Two Common Plantation Trees of Bangladesh

  • Dutta, Shourav;Hossain, Mohammed Kamal
    • Journal of Forest and Environmental Science
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    • v.33 no.1
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    • pp.22-32
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    • 2017
  • An experiment was set to assess the effect of mixed plantings on initial growth and biomass yield of two common plantation tree species of Bangladesh namely Acacia auriculiformis (A) and Gmelina arborea (G). Study was carried out in the nursery bed of the Seed Research Laboratory and Nursery of Institute of Forestry and Environmental Sciences, Chittagong University (IFESCU), Bangladesh during February to November, 2015. The treatments consisted of two pure planting plots (100% A and 100% G) and five mixed planting plots (50%A: 50%G, 35%A: 65%G, 25%A: 75%G, 65%A: 35%G and 75%A: 25%G) of these two species. In nursery, seedlings were raised in a randomized blocks with four replicates of seven treatment plots. Periodic increments on height (cm), collar diameter (cm) and leaf/phyllode number of the seedlings was taken in every month and continued up to 10 months. The growth and biomass yield of seedlings were measured 10 months after the first seed was emerged. The effects of mixed plantation on growth and biomass were compared to that of seedlings grown in pure plantation. At the age of 10 months it was found that G. arborea seedlings were significantly tallest (240.13 cm) when planted with A. auriculiformis in a proportion of 25%A: 75%G, whereas A. auriculiformis were tallest in the pure 100% A plot, with an average mean height of 135.36 cm. Maximum collar diameter (1.38 cm) was recorded for G. arborea in the mixed plots 75%A: 25%G. Fresh and dry weight of shoots and roots of the seedlings were found significantly (p<0.05) highest in 50%A: 50%G plot for G. arborea. G. arborea also showed highest quality index when mixed with A. auriculiformis in a proportion of 50:50, with an average value of 8.96. The results revealed a positive correlation between seedling growth and various planting patterns.

Effects of Nursery Condition on the Establishment and the Growth of Sesame Seedling (참깨묘 양성조건이 활착 및 생육에 미치는 영향)

  • Jung-Il Lee
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.28 no.3
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    • pp.386-389
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    • 1983
  • An experiment was conducted to establish the appropriate tranaplanting method of sesame seedlings. Covering of polyethylene film on nursery bed resulted in more adventitious roots and better growth after transplanting. Nursery soil showed the best results when it was mixed with the equal amounts of soil, sand and compost. The most healthy seedlings were raised by spot seeding of 5${\times}$5 cm distance and 4 cm bed-depth. Compared to direct seeding on June 15, sesame seeded on June 10 followed by transplanting on June 30 flowered 4 days earlier and produced more capsules per plant and 18% more seed yields.

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Ecological Studies of Bakanae Disease of Rice, Caused by Gibberella fujikuroi (벼 키다리병의 발생생태에 관한 연구)

  • Kim Chang Kyu
    • Korean journal of applied entomology
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    • v.20 no.3
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    • pp.146-150
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    • 1981
  • Two rice cultivars infected by Gibberella fujikuroi, were tested to investigate the sequential change of disease development in the field conditions. In the preliminary test, the seeds of Nongbaek and an unknown cultivar showed 21 and $31.7\%$ infection by C. fuiikuroi. At the late stage of water nursery bed, some seedlings produced typical elongation symptom of bakanae disease and most of the leaves were dried up within a few days after transplanting. Out of the healthy looking seedlings, some plants also developed bakanae symptoms from middle June being two week after transplanting and the number was increased until middle September.

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Growth and Ginsenoside Content of One Year Old Ginseng Seedlings in Hydroponic Culture over a Range of Days after Transplanting (수경재배 시 1년생 묘삼 이식 후 경과일수에 따른 인삼의 생육 및 Ginsenoside 함량)

  • Jeong, Dae Hui;Lee, Dae Young;Jang, In Bae;Yu, Jin;Park, Kee Choon;Lee, Eung Ho;Kim, Young Jun;Park, Hong Woo
    • Korean Journal of Medicinal Crop Science
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    • v.26 no.6
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    • pp.464-470
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    • 2018
  • Background: Ginseng produced by hydroponics can be cultivated without using agricultural chemicals; thus, it can be used as a raw materials for functional foods, medicines, and cosmetics. This study aimed to determine the optimal harvesting time to obtain the highest levels of ginsenoside and ginseng, as this was not previously unknown. Methods and Results: One-year-old organic ginseng seedlings were transplanted and cultivated using hydroponics for 150 days in a venlo-type greenhouse, using ginseng nursery bed soil and a nutrient solution ($NO_3{^-}-N$; 6.165, P; 3.525, K; 5.625, Ca; 4.365, Mg; 5.085, S; $5.31mEq/{\ell}$). Ginsenoside content and fresh and dry weights were higher at 120 days after transplanting than at 30, 60, 90, and 150 days. Total ginsenoside content was 11.86 times higher in the leaf and stem than in the root at 120 days after transplanting. Ginsenosides F1, F2, F3, and F5 were detected in ginseng leaves and stems. These chemical compounds are known to be effective in altering skin properties, including whitening, anti-inflammation, and anti-aging. Conclusions: Optimal harvesting time for ginseng cultivated using hydroponics was 120 days after transplanting when the biomass and ginsenoside content were highest.

Low-Input and Energy Efficiency of Direct Seeding Method in Rice (벼 직파재배 노동력 투입 및 에너지 효율성 비교)

  • 이호진;서준한;이정삼;정영상;박정근
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.41 no.1
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    • pp.115-122
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    • 1996
  • One of the most laborious work in rice farming is transplanting of rice seedling which has been required preparation of nursery bed and care of seedling during one month period. In this research, direct seeding in dry paddy(DS) and direct seeding in wet paddy(WS) were practiced to compare with traditional transplanting(TP) in Suwon. Growth stages in direct seeding were delayed as its planting time was about 21 days later than those of TP. Heading stage of direct seeding at Suwon was delayed about 9 days as compared to transplanting culture. Rice yield was not different between the seeding practises. Working-hour saving was about 17%(DS) and 28%(WS). Production cost of direct seeding was decreased 20%(DS) and 32%(WS), respectively. Amount of rice production per a unit working-hour in direct seeding could increase 14%(DS) and 39%(WS) compared to that of TP, respectively. Therefore, direct seeding could save significantly working hour and production cost without reducing rice yield. WS was more effective than DS in saving labor and production cost. Direct seeding was not efficient method in input of farming energy and agricultural chemicals.

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A Study on the Seed Germination and Seedling Density of Fraxinus mandshruica in Nursery (포지(圃地)에 있어서 들메나무의 종자발아(種字發芽) 및 묘목생육밀도(苗木生育密度)에 관한 연구(研究))

  • Chung, Seung Ho;Kim, Jong Won;Lee, Geun Soo
    • Journal of Korean Society of Forest Science
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    • v.63 no.1
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    • pp.9-11
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    • 1984
  • This study was carried out to compare the seed germination and seedling growth of Fraxinus mandshurica growing in natural forests of the interior of Korea. Three stimulation methods were used for germination and the seedlings were planted with various densities. The results obtained were summarized as follows: 1) It was suggested that the 80 seedlings per square meter were proper densities for their growth at a nursery bed. 2) Among the three stimulation methods, 19.9% of germination was shown by the moisture storage, 2.3% by cold and warm stratification, and 0.4% by cold stratification. 3) The 8.1% of the total seedlings showed secondary height growth.

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A Study on Establishment of Similar Expousre Groups(SEGs) for Chemical and Biological Risk Factors in Farm Work (농작업시 발생하는 화학적 및 생물학적 위험요인에 대한 유사노출작업군 설정 연구)

  • Lee, Minji;Sin, Sojung;Kim, Hyocher;Heo, Jinyoung;Ahn, Minji;Kim, Kyungran;Kim, Kyungsu
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.30 no.3
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    • pp.292-298
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    • 2020
  • Objectives: The aim of this research is to establish Similar Exposure Groups (SEGs) for chemical and biological risk factors that occur in farm work involving 24 tasks among 15 crops. Methods: To categorize SEGs, work type, work environment, and similar tasks for each crop were considered. After confirming the chemical risk factors (pesticides, inorganic dust-total dust and PM10, ammonia, and hydrogen sulfide) and biological factors (organic dust-total dust and PM10, and endotoxins) that occur in the crops and tasks, similar crops and tasks were selected as SEGs. Results: Among chemical risk factors, pesticides was selected for the SEGs, which was categorized by open field, greenhouse, fruit, and specialty crops. For inorganic dust, open field (plowing harrowing, seedling, planting, harvest, and sorting and packing) and specialty crops (plowing harrowing, seedling, planting, and harvest) were selected as SEGs. For ammonia and hydrogen sulfide, livestock (preparation of farm, management of nursery bed, feeding, shipment and manure treatment) were selected as SEGs. For biological risk factors such as organic dust (total dust, PM10) and endotoxins, open field (manure application), greenhouse (plowing harrowing, planting, manure application, and harvest), fruit (manure application), specialty crops (manure application, making furrows, mixing mushroom media, harvest, and sorting and packing), and livestock (preparation of farm, maintaining poultry litter, feeding, shipment and manure treatment) were selected as SEGs. Conclusions: To establish similar exposure groups in agriculture, it is important that the characteristics of each hazard factor are categorized by identifying risk factors occurring by tasks.

Effect of Artificial Soils and Aqueous Solutions for Plantlet Acclimatization of Somatic Embryos of Aralia elata (두릅나무 체세포배 유래 소식물체의 순화에 미치는 배양토 및 공급액의 효과)

  • 문흥규;배찬호;김용욱;이재순;이재선
    • Korean Journal of Plant Tissue Culture
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    • v.28 no.5
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    • pp.273-276
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    • 2001
  • In order to develop effective acclimatization methods for Aralia elata plantlets regenerated from somatic embryos, various acclimatizing conditions were compared regarding both survival rate and growth of the plantlets. The plantlets were transplanted into plastic boxes containing artificial soil in the presence of either several levels of MS liquid media, distilled water, 2% sucrose or 0.1% hyponex solution. They were then cultured by spraying of distilled water twice a week and maintained in the normal tissue culture room. Perlite was proved to be better than vermiculite on survival rate and growth of the plantlets. As the size of perlite (larger than 0.2 cm in diameter) increased, both the survival rate and growth of the plantlets improved. Among the various MS liquid media and different aqueous solutions tested, distilled water appeared to result in the best survival rate and growth. MS media were also effective in increasing survival rate and supporting growth when diluted to 1/4 and/or 1/8. The acclimatized plantlets could be transplanted directly onto the nursery bed and grown normally. The above results suggest that plantlets regenerated from somatic embryos of Aralia elata be effectively acclimatized using a plastic box containing perlite with distilled water treatment.

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