• Title, Summary, Keyword: Chinese cabbage

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Expression Characteristics of Chinese Cabbage

  • Kim, Y.J.;Oh, Y.T.;Lee, D.H.;Lee, Y.B.
    • Proceedings of the Korean Society for Agricultural Machinery Conference
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    • pp.1318-1328
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    • 1993
  • Expression of chinese cabbage was conducted in order to investigate its dewatering behavior. Chipped cabbage was packed into cylinder and pressed by piston up to the predetermined pressure on Instron-1000. The rates of dewatering were affected domintantly by the applied pressure, but not significantly by the packed amount of cabbage in the cylinder. The pressure effect was increased very abruptly at first, but the increase rate was very low at high pressure greater than 20 MPa, showing great deviation from linear dependence of flow rate on pressure in Darcy's Law. Therefore, water expression from cabbage was not Newtonian flow of water through cell wall. In fact, the squeezed water contained a lot of solid particles, showing destruction of cell wall. The content of solid particles in expressed water was only slightly lower than the dry matter content of fresh chinese cabbage, determined by drying oven method.

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Characteristics of Growth and Salting of Chinese Cabbage after Spring Culture Analyzed by Cultivar and Cultivation Method (봄배추 재배방법 및 품종에 따른 생육 및 절임 특성)

  • Lee, Jung-Soo;Park, Su-Hyung;Lee, Youn-Suk;Lim, Byung-Sun;Yim, Sang-Chul;Chun, Chang-Hoo
    • Korean Journal of Food Preservation
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    • v.15 no.1
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    • pp.43-48
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    • 2008
  • This experiment investigated the characteristics of salted and fresh Chinese cabbages of different cultivars and using various cultivation methods. We measured the numbers of leaves, sizes, thicknesses, moisture contents, and firmness qualities of fresh Chinese cabbage grown in a plastic house, and outdoors. 'The bulb sizes, leaf thicknesses, and moisture contents of leaves were higher after plastic house cultivation than after growth in the field. Plastic house culture increased the growth rate of Chinese cabbage. Firmness and osmolarity showed better values after outdoor cultivation, however. The growth rates and the levels of chemical components were affected by interactions between cultivation methods and cultivars of Chinese cabbage. The salt levels of salted Chinese cabbage were 1.21.7% (w/w) after cabbages cultivated outdoors were preserved, and 0.91.2 % (w/w) after vegetables grown in a plastic house were treated. The quality properties of postharvest Chinese cabbages after salting varied with cultivation method even when the same cultivars of Chinese cabbage were used. The salt contents of salted Chinese cabbage thus varied with different cultivation methods. The results indicate that the properties of Chinese cabbage vary with the culture systems adapted.

Occurrence of Virus Disease of Chinese Cabbage and Its Influence on Cabbage Production in Alpine Area (고랭지배추 바이러스병의 발생 및 피해요인 분석)

  • 최준근;이재홍;이세원;함영일;안재훈;최장경
    • Korean Journal Plant Pathology
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    • v.14 no.5
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    • pp.433-439
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    • 1998
  • The studies on the ecology of virus disease on Chinese cabbage (Brassica campestris subsp. pekinensis) cultivated in alpine area of Kangwon province during summer season to analyse its influence on damage and develope a prediction model were performed from 1993 to 1997. Virus disease on Chinese cabbage occurring in the alpine area showed various symptom types and among there, necrotic spots and dwarf were mainly detected. The disease was increased from early August and continued mid September in every year. The occurrence of virus disease was the highest in 1994 with 20.5%, and the number of aphid vectors were also the highest during the same period. The number of aphids in the alpine areas showed twice peaks every year. For the analysis of damage by virus infection, the infection and injured ratio of all treatments were more than 90% and 80%, respectively. The most important factor for the occurrence of virus disease on Chinese cabbage was temperature. Factors influencing the development of the viral disease in the alpine area were maximum temperature and number of aphid vectors.

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Activation of Defense Responses in Chinese Cabbage by a Nonhost Pathogen, Pseudomonas syringae pv. tomato

  • Park, Yong-Soon;Jeon, Myeong-Hoon;Lee, Sung-Hee;Moon, Jee-Sook;Cha, Jae-Soon;Kim, Hak-Yong;Cho, Tae-Ju
    • BMB Reports
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    • v.38 no.6
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    • pp.748-754
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    • 2005
  • Pseudomonas syringae pv. tomato (Pst) causes a bacterial speck disease in tomato and Arabidopsis. In Chinese cabbage, in which host-pathogen interactions are not well understood, Pst does not cause disease but rather elicits a hypersensitive response. Pst induces localized cell death and $H_2O_2$ accumulation, a typical hypersensitive response, in infiltrated cabbage leaves. Pre-inoculation with Pst was found to induce resistance to Erwinia carotovora subsp. carotovora, a pathogen that causes soft rot disease in Chinese cabbage. An examination of the expression profiles of 12 previously identified Pst-inducible genes revealed that the majority of these genes were activated by salicylic acid or BTH; however, expressions of the genes encoding PR4 and a class IV chitinase were induced by ethephon, an ethylene-releasing compound, but not by salicylic acid, BTH, or methyl jasmonate. This implies that Pst activates both salicylate-dependent and salicylate-independent defense responses in Chinese cabbage.

Effect of Inter-and mixed cropping with Attractant and Repellent Plants on Occurrence of Major Insect Pests in Organic Cultivation of Chinese Cabbage (간.혼작을 이용한 유기농 배추 주요해충 발생경감 효과)

  • Kim, Min-Jeong;Shim, Chang-Ki;Kim, Yong-Ki;Jee, Hyeomng-Jin;Yun, Jong-Chul;Park, Jong-Ho;Han, Eung-Jung;Hong, Sung-Jun
    • Korean Journal of Organic Agriculture
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    • v.21 no.4
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    • pp.685-699
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    • 2013
  • This study was evaluated the effect of attractant or repellent plants for establishing push-pull strategy for insect pest management of organic Chinese cabbage cultivation. The attractant or repellent effect of Ten plants, marigold, rye, Chinese chive, lettuce, chicory, Nongwoo-chicory, crown daisy, Treviso, green leaf mustard, and red leaf mustard were evaluated against diamondback moth, striped flea beetle, aphids, brown-winged stink bug and cabbage stink bug in organic Chinese cabbage field in Seosan in 2012. Of the ten repellent or attractant plants, rye and chicory attracted significantly brown-winged stink bug and cabbage stink bug, respectively. Aphids ate attracted significantly to the rye rather than the other plants. Leaf mustard was attracted cabbage stink bug and brown-winged stink bug in order. Cabbage stink bug was attracted by only a combination of lettuce and Chinese chive. Diamondback moth, striped flea beetle, aphid, brown-winged stink bug and cabbage stink bug were significantly repelled by single or combined cultivation of crown daisies, Treviso, and leaf mustard in organic Chinese cabbage cultivation. The results above-mentioned indicate that selected insect-attractant and -repellent plants can be used as tools for integrated pest managements of Chinese cabbage.

Changes in Free Amino Acid, Carotenoid, and Proline Content in Chinese Cabbage (Brassica rapa subsp. Pekinensis) in Response to Drought Stress

  • Shawon, Rayhan Ahmed;Kang, Baek Song;Kim, Ho Cheol;Lee, Sang Gyu;Kim, Sung Kyeom;Lee, Hee Ju;Bae, Jong Hyang;Ku, Yang Gyu
    • Korean Journal of Plant Resources
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    • v.31 no.6
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    • pp.622-633
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    • 2018
  • Chinese cabbage grown during autumn season is confronted with drought conditions for a certain period, especially during the early growth stage. In this study, we investigated the effects of drought stress on plant growth characteristics, as well as free amino acid, carotenoid, and proline in Chinese cabbage. Chinese cabbage seeds (Bulam Plus) were germinated, and all the seedlings were transplanted into plastic containers (28 cm diameter ${\times}$ 22 cm high) containing a commercial growth medium. The soil water content was measured and maintained at 10% for the drought-stressed plants and at 30% for the control plants, for three weeks. The results revealed that plant growth parameters were lower in the drought-stressed plants than in the control plants. The total free amino acid content tended to decrease in both drought-stressed and control plants with time. The total free amino acid content was found to be lower in the drought-stressed plants than in the control plants and the proline content was unaffected. Moreover, at three weeks after treatment, carotenoid content in drought stressed plants was significantly higher than that in the untreated plants. We believe that our study makes a significant contribution to the literature because the effects of drought stress on plant growth parameters, free amino acid, carotenoids, and proline accumulation in autumn growing cultivar of Chinese cabbage have not been widely studied in Korea, and our study provides valuable information in this regard, as Chinese cabbage is consumed throughout the year in Korea.

Effect of Natural Materials on Growth and Quality of Chinese Cabbage (天然物質 處理가 배추의 生長과 品質에 미치는 영향)

  • Kim, Kyung-Je;Lee, Byung-Moo
    • Korean Journal of Organic Agriculture
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    • v.10 no.4
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    • pp.37-45
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    • 2002
  • This study was conduction to investigate the effects of natural materials such as $GB_{10}$ chitofarm, chaff charcoal, and chaff charcoal sap, on quality and yield of chinese cabbage, Natural materials were treated on seeds soil, and leaves. The total plant weight, head weight, head length, head width, leaf length, leaf width, and sugar content of chinese cabbage in treatment with natural materials showed significant difference compared with control. The yield of chinese cabbage in $GB_{10}$ soil treatment and 1% $GB_{10}$ leaf treatment was increased 53% compared with control. The total nitrogen $P_2O_5$, $K_2O$, CaO, MgO, $Na_2O$, and Mn in total plant were analyzed. The chemical components were increased in total plant of chinese cabbage treated with natural materials compared with control natural materials increased the quality of chinese cabbage.

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Effect of biochar application on growth of Chinese cabbage (Brassica chinensis)

  • Oh, Taek-Keun;Lee, Jae-Han;Kim, Su-Hun;Lee, Ho Cheol
    • Korean Journal of Agricultural Science
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    • v.44 no.3
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    • pp.359-365
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    • 2017
  • Biochar has the ability to mitigate climate change, improve crop productivity, and adsorb various contaminants. The aim of this work was to confirm the effect of biochar as a soil amendment on growth of Chinese cabbage (Brassica chinensis) using a pot experiment. Biochar was produced from residual-wood burnt at a pyrolytic temperature of $400^{\circ}C$ and consisted of 51.6 % carbon (C) by mass. The biochar was added to the soil at 0, 1, 3, and 5% by weight, which represent about 0, 18, 54, and $90t\;ha^{-1}$, respectively. The treatments were arranged in a randomized complete block design with 3 replications. The Chinese cabbage was grown for 49 days in a glasshouse in pots filled with sandy loam soil. Experimental results showed that the residual-wood biochar used for the experiment was slightly alkaline (pH 7.5). The fresh weights of Chinese cabbage were 86.22 g, 84.1 g, 63.23 g and 70.87 g, respectively, for biochar applications at 0, 18, 54, and $90t\;ha^{-1}$. Compared with the control (i.e., no biochar), biochar application increased soil pH and electrical conductivity (EC). Addition of biochar (54 and $90t\;ha^{-1}$) to sandy loam soil had no effect on growth of Chinese cabbage. This might be due to excessive increase of soil pH from the biochar application, leading to reduced availability of plant nutrients. Based on these results, the authors conclude that an excessive addition of biochar may have negative effects on the healthy growth of Chinese cabbage.

Quality Characteristics of Salted Chinese Cabbage Treated with Electrolyzed-Acid Water during Storage (전해산화수로 세척한 절임 배추의 저장중 품질 특성)

  • Park, Woo-Po
    • Korean Journal of Food Science and Technology
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    • v.36 no.2
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    • pp.365-367
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    • 2004
  • Electrolyzed-acid water was used to prolong shelf life of salted Chinese cabbage during storage, Chinese cabbage was salted, washed twice with electrolyzed-acid water, packaged in high-density polyethylene film, and stored at $10^{\circ}C$. Titratable acidity, pH, color, and microbial loads of salted Chinese cabbage were measured. Treated sample showed lower pH, total microbial count, and lactic acid bacteria than those of control, whereas almost equal titratable acidity and color, Acidity of treated sample maintained lower pH value until 6 days, and remained constant thereafter, Sharp decrease in L value occured after 2 days for control, and was delayed 4-6 days for treated sample. Salted Chinese cabbage treated with electrolyzed-acid water showed lower total microbial load ($10^3\;CFU/mL$) and lactic acid bacteria ($10^1\;CFU/mL$) after washing, whereas similar loads, compared to control after 6 days. Treatment with electrolyzed-acid water maintained higher quality for salted Chinese cabbage, with limited shelf life extension.

Leaf Rot and Leaf Ring Spot Caused by Rhizoctonia solani in Chinese Cabbage

  • Shim, Chang-Ki;Kim, Min-Jeong;Kim, Yong-Ki;Jee, Hyeong-Jin;Hong, Sung-Jun;Park, Jong-Ho;Han, Eun-Jung;Yun, Jong-Chul
    • Research in Plant Disease
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    • v.19 no.4
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    • pp.300-307
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    • 2013
  • This study was conducted to determine the occurrence of leaf rot and leaf ring spot, caused by Rhizoctonia solani in Chinese cabbage under seedling nursery and cultivation greenhouses. Symptoms of leaf rot and leaf ring spot were found in three Chinese cabbage cultivars, Brassica campestris subsp. pekinensis, 'Ryeokgwang', 'Daetong', and 'CR mat'. In Hwacheon, the disease incidence was 73.8% in the seedling stage of the Chinese cabbage. In Icheon, the symptoms were observed on the upper leaves of the Chinese cabbage cultivar, 'Norangmini' with 20.5% of disease incidence. The symptoms appeared as primary lesions consisting of small, circular necrotic ring spots with gray color, 1.4-3.0 mm in diameter, accompanied by secondary rot lesions with large irregular borders of leaves. The color of mycelial mat of 20 isolates was dark brown and light brown. The average hyphal diameter of all the isolates was within 5.01-11.12 ${\mu}m$. Among the 20 strains isolated from Chinese cabbage, 16 isolates and four isolates anastomosed with the AG-1 (IB) and AG-1 (IC), respectively. Twenty isolates tested were only virulent on foliage parts of Chinese cabbage leaves but were avirulent on stem parts of the plants. Based on the mycological characteristics and pathogenicity test on host plants, the fungus was identified as Rhizoctonia solani.