• Title/Summary/Keyword: conventional rice

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Cooking Properties of Waxy Varieties of Rice (통일(統一) 찹쌀의 가공(加工) 및 조리특성(調理特性)에 관한 연구(硏究))

  • Kim, Hyong-Soo;Moon, Soo-Jae;Sohn, Kyong-Hee;Heu, Mun-Hue
    • Korean Journal of Food Science and Technology
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    • v.9 no.2
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    • pp.144-152
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    • 1977
  • The physiochemical properties of eight different cultivars or newly bred lines of glutionous rice were investigated and obtained following results; (1) The gelatinizing temperature, blue value and alkali number of starch separated from the sample cultivars or lines were similar to those of starch from conventional cultivar Olchal. The expansive power of three newly bred lines were somewhat weaker than that of starch from conventional cultivar, but the expansive power of other four lines were similar to that of conventional cultivar. (2) pH of cooked rice of the ten sample cultivars or breeding lines showed no discernible differences rangeing from 6.54 to 6.60. (3) The degree of gelatinization of cooked rice of newly bred lines were rather lower than that of conventional ones, but the degree of their retrogradation were somewhat higher than that of conventional cultivars. (4) In order to improve the palatability of cooked rice of Tongil (common rice), glutinous rice were mixed in different rate. The results showed that a mix ratio of six per cent glutinous rice was most favourable. The acceptability of common Tongil rice was improved when it was cooked with four to six per cent of glutinous rice mixed, and it showed no significant difference from that of Akibare alone cooked rice. Also no difference was noticed among newly bred glutinous lines in the acceptability when they cooked with common Tongil rice mixed. (5) Injolmi, Yaksik, Misitgaru, Twipap and Yugwa were prepared from glutinous rice of sample cultivars and or breeding lines to study their characteristics in processing and their acceptability. The results indicated that the acceptability score of newly bred lines were lower than that of conventional cultivar in cases of Twipap and Yugwa, but in cases of Injolmi, Yaksik and Misitgaru, identical score was obtained from both of newly bred lines and conventional cultivars.

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Influence of Controlled-release Fertilizer Levels on Rice Growth, Weed Control and Nitrogen Efficiency in Paper Mulching Transplanting (벼 종이멀칭이앙 시 완효성비료 수준이 벼 생육, 잡초방제 및 질소효율에 미치는 영향)

  • Jeon, Weon-Tai;Yang, Won-Ha;Roh, Sug-Won;Kim, Min-Tae
    • Korean Journal of Soil Science and Fertilizer
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    • v.39 no.6
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    • pp.345-350
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    • 2006
  • Recently we have interest on rice products developed by environment-friendly management. The technology of paper mulching was practised without herbicide in machine transplanting cultivation of paddy. A field experiment was conducted on Gangseo series (coarse loamy, mixed, nonacid, mesic family of Aquic Fluventic Eutrochrepts) at the National Institute of Crop Science (NICS), RDA, Suwon, Gyeonggi province, Republic of Korea in 2004. This experiment was carried out to evaluate rice growth, weed control and nitrogen efficiency by the different controlled-release fertilizer levels in paper mulching transplanting. Treatments consisted of conventional fertilization, controlled-release fertilizer (100%, 80%, 60%) compared with nitrogen amount ($110kg\;ha^{-1}$) of conventional fertilization and no nitrogen plot. Mulching paper consisted of recycled paper which was coated with biodegradable plastics. There were no differences between conventional rice transplanting and paper mulching on missing hills. Weed occurrence and control were diverse and low as fertilizer amount increased. Plant height and tiller number per hill increased as fertilizer amount decreased. There were no difference between controlled-release fertilizer 80% and conventional fertilization plot on rice growth traits. Leaf color and $NH_4{^+}-N$ in soil had similar trends. There was no difference in yield between controlled-release fertilizer 80% and conventional fertilization plot. Agronomic nitrogen-use efficiency was high as fertilizer amount decreased. Therefore, these results suggested controlled-release fertilizer 80% should be optimum amount under paper mulching transplanting of rice considering weed control, rice growth and nitrogen efficiency.

Bottle Cultivation of Pleurotus ostreatus, Agrocybe aegerita and Ganoderma lucidum by using Rice hull media (왕겨배지를 이용한 느타리, 버들송이, 영지 병재배 효과)

  • 이희덕;김홍규;김용균;이가순
    • Korean Journal of Plant Resources
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    • v.14 no.3
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    • pp.213-219
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    • 2001
  • Rice hull was used as an additive in order to determine the its effect on increse of mushroom growth and yield in Chungnam Provincial techinical institution. In the treatment of 80% rice hull in small Neutaribeosut, mycelial growth duration was shown to be shorter about 11 days and yield increased about 7oie than those of conventional culture. In the case of Chongpung Neutaribeosut bottle culture, mycelial growth duration was shorter about 2 to 3 days in additive of 30 to 80% rice hull compared to conventional, but yield was similar to that of conventional. In the treatment of 30% rice hull in Agrocybe aegerita bottle culture, mycelial growth and yield increased 6 days and 6% than those of convrntional, respectively. In the treatment of 30% to 40% rice hull in Ganoderma lucidum bottle culture, mycelial grow durations were similar 45 days and 38 g/bottle.

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Organic Rice (Oryza sativa L.) Production in Eco-friendly Complex using Gelatin·Chitin Microorganisms (친환경 광역단지 내 젤라틴·키틴분해미생물을 이용한 유기 벼 생산)

  • Choi, Seung-Hee;Cha, Kwang-Hong;Seo, Dong-Jun;Park, Hung-Gyu;Kwon, Oh-Do;An, Kyu-Nam;Lee, Jai-Hak;Kim, Kil-Yong;Jung, Woo-Jin
    • Korean Journal of Organic Agriculture
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    • v.26 no.4
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    • pp.629-647
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    • 2018
  • This study was carried out to investigate the economic value of organic rice production using gelatin chitin microorganisms in eco-friendly complex, Gongsan, Naju city. The soil condition of experiment paddy field was Jeonbuk series and silt loam with a slightly poor drainage. Except for the high effective silicate, the chemical characteristics of soils used were included in the optimum range of paddy soils in Korea. In growth, plant length, tiller number, ear number, and ear length were observed to be higher in conventional paddy fields than organic paddy fields. However, number of grain per panicle and grain filling ratio (%) were higher in organic paddy fields than conventional paddy fields. Incidences of diseases and insect pests were slightly higher in the organic paddy fields. Water weevil, sheath blight, rice leaf roller and rice blast were more occurred in organic paddy field. On the other hand, false smut was higher occurred in conventional paddy field. There was a significant negative correlation between rice sheath blight and rice leaf roller, and rice yield. In the milled rice quality, the quality of organically cultivated milled rices was lower by the increase of broken rice than that of conventionally cultivated milled rices. The quality and palatability of rice were higher in organic cultivation with decreasing of protein content. Net income of conventionally and organically cultivated rice was 360,000 won/10a and 610,000 won/10a, respectively. Premium net income of the organically cultivated rice was 68%.

ANALYSIS OF POTENTIAL MARKET OF ORGANIC PRODUCTS (유기농산물의 잠재시장 분석)

  • 서종혁;김종숙
    • Korean Journal of Organic Agriculture
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    • v.2 no.1
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    • pp.24-28
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    • 1993
  • Even though the price level of organic rice is 20% higher than conventional product, 25% of the total surveyed consumers are willing to purchse organic rice of different income level, the monthly average income was 1, 100, 000Won. 35% of the total consumers in this income class is willing to purchase organic rice.

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Effect of Reclaimed Sewage Irrigation on Paddy Rice Culture and Soil Characteristics (오수처리수의 관개가 벼 생육 및 토양 특성에 미치는 효과)

  • 윤춘경
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.42 no.3
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    • pp.66-75
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    • 2000
  • Effect of reclaimed sewage on the paddy rice culture was examined by field experiment for two consecutive years. The domestic sewage was treated by the constructed wetland and the effluent of the treatment wetland was used for irrigation water. The reclaimed sewage was diluted before irrigation in the first year and it was used without dilution in the second year experiment. Growth components and yields were compared against the control plot where conventional method was applied. And also soil characteristics of the plots before and after reclaimed sewage irrigation were analyzed Generally addition of the reclaimed sewage irrigation didn't affect paddy rice culture adversely and even enhancement was observed. Fertilization was thought to be important factor for rice culture rather than irrigation water quality. Conventional fertilization and reclaimed sewage irrigation which contained high nutrient concentration resulted in better growth and more yield. Unlike widespread concern lodging did not happen even in the case of irrigation with average 90mg/L of T-N and conventional fertilization. Soil characteristics changed after irrigation and significant EC increasing was observed for the reclaimed sewage irrigation plots. From soil analyses salt accumulation could be a more potential problem than nutrients like nitrogen and phosphorus in the use of reclaimed sewage irrigation. Overall reclaimed sewage irrigation was thought to be one of practical alternatives for the ultimate disposal of sewage in rural area.

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Elimination of BHC Residues in the Polishing and Cooking Processes of Brown Rice (현미(玄米)의 도정(搗精) 및 취반(炊飯) 과정중 BHC 잔류분(殘留分)의 제거(除去))

  • Kim, Yong-Hwa;Kim, Hye-Nam;Kim, Sang-Soon;Lee, Su-Rae
    • Korean Journal of Food Science and Technology
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    • v.11 no.1
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    • pp.18-25
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    • 1979
  • In order to investigate the effect of polishing washing and cooking processes on the residue level of BHC in rice grain, brown rice samples having a 0.3 ppm total BHC content were subjected to various treatments and residue analysis. The results are summarized as follows: 1) The conventional polishing process of brown rice decreased the residue level down to 8 and 20% for 100 and 70% polished rice, respectively. 2) The washing procedure decreased the level to 34 and 31% for 100 and 70% polished rice, respectively. 3) The cooking processes with a conventional kettle and an automatic electric cooker decreased the residue level to 86 and 77% in 100% polished rice, and 69 and 41% in 70% polished rice, respectively. 4) By summation of the above results in sequence. it was concluded that the residue levels of BHC in cooked rice were 2.3 and 4.3% of original residue in the brown rice for 100 and 70% polished rice, respectively.

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Comparison of Nitrogen Application Methods at the 4th Leaf Stage in Direct-Seeded Rice Field

  • Chun, Nam-Jin;Kang, Yang-Soon;Park, Jeong-Hwa;Yoon, Yong-Hwan;Kim, Chung-Kon
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.46 no.2
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    • pp.84-88
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    • 2001
  • Two methods of nitrogen application at the 4th leaf stage were evaluated in direct-seeding rice cultivation on dry paddy soil: one was the top dressing of nitrogen on dry paddy condition before irrigation (TNDP) for labor saving, and the other was the top dressing of nitrogen on dry paddy with mechanical rotavation of the inter-row space (TNDPIR) for increasing the efficiency of nitrogen. To evaluate these two application methods, leaf chlorophyll contents, growth characteristics and yields were compared with two conventional methods, basal application (BA) and top dressing on flooded paddy condition at the 4th leaf stage (TNFP). The SPAD value of rice in TNDP was similar with that in TNFP throughout the whole growth stage of rice. Also, there were no differences in rice growth and yield between the two methods. However, in TNDPIR, the SPAD value was the highest during tillering stage among the four application methods, and the tiller number, LAI at heading stage and the panicle number were higher than the two conventional methods.

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Effects of No-tillage Dry-seeding on Rice Growth and Soil Hardness

  • Choi, Jong-Seo;Kim, Sook-Jin;Park, Jeong Hwa;Kang, Shingu;Park, Ki-Do;Yang, Woonho
    • Korean Journal of Soil Science and Fertilizer
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    • v.49 no.6
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    • pp.662-668
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    • 2016
  • No-tillage dry-seeding of rice can offer potential benefits by reducing time and labor cost compared with conventional tillage practices. This study was conducted to investigate the effects of no-tillage dry-seeding on rice growth and soil hardness in comparison with other rice cultivation methods, machine transplanting and wet-hill-seeding on puddled paddy. The seedling stand fell within optimum range for both no-till dry-seeding and wet-hill-seeding on puddled paddy. Plant height, number of tillers and SPAD values in no-tillage dry-seeding cultivation were higher than those observed in other methods. There were no significant differences in grain yield of rice among three cultivation methods. The quality characteristics of milled rice grown in no-tillage dry-seeding were similar to those grown in other cultivation methods. Soil hardness in top 10 cm depth was significantly higher in no-tillage dry-seeding than other cultivation methods, while soil hardness below 10 cm depth was highest in machine transplanting cultivation. Results indicate that no-tillage dry-seeding practice is comparable to conventional tillage system in terms of seedling establishment, growth, yield and grain quality.

Effects of the Application of Alternative Agricultural Materials on the Growth of Rice and Water Quality in Paddy Field (벼 생육 및 수질에 대한 대체농자재의 영향)

  • Moon, Young-Hun;Choi, Joung-Sik;Uhm, Mi-Jeong;Han, Seong-Soo
    • Korean Journal of Environmental Agriculture
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    • v.22 no.4
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    • pp.273-277
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    • 2003
  • The aim of this study was to apply the new agricultural technique developed for three years($'96{\sim}'98$) by demonstration at an model farm of environmental agriculture located in Bangsan-ri, Dagang-myun, Namwon-city. Rice growth of environmental farming plot, which supplied with oil cake and compost fermented with chicken manure was reduced compared to that of conventional farming plot, which supplied with chemical fertilizers. Weed control by using of Ampullarius insularus in the rice paddy field was effective compared to that of control, which treated with chemical herbicide twice. The yield of rice was decreased of 35% in both environmental and eclectic farming polt compared to that of conventional farming plot. The water quality of environmental not and eclectic farming plot were good compared to conventional farming plot. Density of water flea was high in environmental and eclectic farming plot compared to that of the conventional farming plot.