• Title, Summary, Keyword: grain quality

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Changes in the Grain Quality of Rice with Respect to the Duration of Lodging Time

  • Hwang, Tai-Jeong;Lee, Won-Jong;Shin, Jin-Chul;Lee, Chul-Won;Kim, Suk-Shin
    • Food Science and Biotechnology
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    • v.18 no.6
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    • pp.1459-1463
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    • 2009
  • The specific objective of this study was to determine the changes in grain quality of lodged rice with respect to the duration of lodging time and compare the changes with those of unlodged one. The rice 'Janganbyeo' was cultivated and half of paddy field was totally lodged at 30 days after heading. Both lodged paddy and unlodged paddy were harvested at intervals and used for the grain quality determination. The lodged rice did not show any remarkable changes in grain quality until the $4^{th}$ day of lodging for rough rice and until the $2^{nd}$ or the $4^{th}$ day of lodging for brown rice and white rice. The overall grain quality of lodged rice could be kept for 2 to 4 days of lodging.

Relationship between rice grain quality traits and starch pasting properties using early maturing rice cultivars in Chungnam plain area

  • Yun, Yeo-Tae;Chung, Chong-Tae;Lee, Jae-Chul;Lee, Young-Ju;Na, Han-Jung;Lee, Kwang-Won;Yoon, Young-Hwan
    • Korean Journal of Agricultural Science
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    • v.42 no.3
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    • pp.151-158
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    • 2015
  • This study was conducted to know the variation and relationship of rice grain quality and starch pasting properties by transplanting times. Two early maturing rice cultivars which accounted for the most area of early maturing rice cultivar in Chungnam province were used. The experiment was laid out in a split-plot design with 3 replications. The main plot consisted of three transplanting times viz. early (April 25), ordinary (May 25) and late (June 25) with sub-plots containing two cultivars. According to the transplanting times, most of rice grain quality and starch pasting properties showed significant difference and Joami showed higher grain quality than Unkwang in all transplanting times. Especially, rice grain quality was improved when transplanted late, showing high head rice and glossiness of cooked rice due to the lower mean temperature during grain filling stage. Glossiness of cooked rice was positively correlated with head rice ratio, amylose content and setback value, and negatively correlated with chalky rice ratio and protein content. The highest positive and negative correlation were observed between breakdown value and peak viscosity ($r=0.98^{**}$), and breakdown and setback ($r=-0.94^{**}$), respectively. These results provide some information for rice researchers and producers producing cultivars with an improved quality, suggesting that rice quality is highly influenced by temperature at grain filling stage, and transplanting times is crucial in improving rice quality. In addition, starch pasting properties are useful for determining rice quality because rice grain quality and starch pasting properties are dependent on each other.

Determination and Effects of N and Si Fertilization Levels on Grain, Quality and Pests of Rice after Winter Green-house Water-melon Cropping

  • Cho Young-Son;Jeon Weon-Tae;Bae Soon-Do;Park Chang-Young;Park Ki-Do;Kang Ui-Gum;Muthukumarasamy Ramachandran
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.51 no.4
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    • pp.274-281
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    • 2006
  • In Korea, rice cultivars have been changing to 'quality' rice rather than high yielding cultivars. However, more than 10% of paddy field has been changed to greenhouse in winter season for cropping of water-melon, oriental-melon, straw berry and et cetra. This experiment has been made to identify the usefulness of critical N and Si fertilization(SF) level to obtain high grain quality rice with reduced insect pest damage by N and SF combination. Before the experiment, watermelon-rice cropping system was maintained for three seasons by farmer from 1998 to 2001. The experiment of N and Si (silicate) fertilization levels was evaluated with Hwayoung-byeo (Oryza sativa L., medium-maturing variety) in 2002 and 2003 in Uiryeong, Korea. Nitrogen fertilization (NF) levels were three and five in 2002 and 2003, respectively, and three SF levels were compared for getting the valuable N/SF level in both years. TOYO-value was positively affected by Si application in N100% plot but it was negatively related with NF level. Normal grain percentage was positively related with TOYO-value and it was highest in 0N plot and Si plots in N100%. Other appearance qualities like powdered, damaged, and cracked grain, were decreased with increasing N fertilization level. SF improved appearance quality in N100% plots but no effects in other treatments. Leaf sheath related diseases were significantly decreased by SF but it was negatively related with NF. In conclusion, SF could be improve grain quality at the same yield levels of conventional fertilization and it also could be reduce the diseases damages of rice plant in all N treatments. NF treatment reduced grain quality and improved grain yield at N50% level, however NF above N50% could not get any kind of benefits. So, compared with conventional fertilizer, reduced NF level is recommended for high grain quality with reduced insect pest damage.

Genetic Ana1ysis for Rice Grain Properties Using a Doubled Haploid Population

  • Qin, Yang;Kim, Suk-Man;Sohn, Jae-Keun
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.52 no.2
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    • pp.123-128
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    • 2007
  • Demand for high quality rice has always been a major factor in the international rice marketing. In the present study, doubled haploid (DH) population derived from anther culture of a Tongil/japonica hybrid was used for genetic analysis of rice grain quality. The average values of DH lines for grain weight, grain length and the ratio of grain length to width were near the mid-parent value. More than 40% DH lines showed transgressive segregation for grain weight, length, amylose and lipid content, but less than 10% DH lines observed on ratio of length to width and grain thickness were transgressive segregation. Correlation analysis between appearance qualities and physicochemical characters indicated that grain width and grain thickness both significantly and negatively correlated to protein and lipid content. A highly significant negative correlation between protein content and amylose content was observed.

Inkjet Printing on the Grain Leather: Evaluation of Line Image Quality on the Grain Leather

  • Park, Heung-Sup;Park, Soo-Min
    • Textile Coloration and Finishing
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    • v.19 no.2
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    • pp.24-31
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    • 2007
  • This paper addresses factors of line image quality on grain leather printed via inkjet printer. Lines were printed onto coated leather media, and line width, edge blurriness, and edge raggedness were evaluated for line image quality. Various factors influenced to wetting and capillary wicking were studied and found out that wicking through capillary between fibers causes significant feathering on leather surface similar with pulp capillary in copy Paper. Polyurethane and acrylic resin coating resulted good image qualify by reducing capillary wicking. The mixture of polyurethane and acrylic resin applied on grain leather satisfied with both image quality and surface hand. $AllWrite^{TM}$ ink brought best results of image quality, comparing with $VeraPrint^{TM}$ ink and $JetWrite^{TM}$ ink.

Correlations of Irrigation Water Quality to Yield and Quality of Rice Grain (관개용수 수질과 벼 수확량, 미질과의 상관관계 규명)

  • Choi, Sun Hwa;Choi, Ho Jin;Jang, Jeon Ryeol;Lee, Seung Heon;Oh, Jong Min
    • Journal of Korean Society on Water Environment
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    • v.21 no.2
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    • pp.169-175
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    • 2005
  • This study was carried out to investigate the effects of irrigation water pollution on the yield and grain quality of rice. It acquires fundamental data to set up water quality standards for irrigation and produce agricultural safety products. The correlations of BOD, T-N, T-P, pH, ECw of the irrigation water with yield, grain appearance quality, and the protein content were evaluated. The field and pot experiments were conducted by using Japonica of Oryza sativa L. during 2 years. BOD concentration in irrigation water effects strongly on grain appearance quality and yield of rice. T-N in irrigation water has strong effect on the yield, appearance, and quality of rice. T-P concentration in irrigation water have not any correlation with yield and quality of rice. pH showed strongly negative correlation with maturity ratio(MTR), 1000 grain weight(TGW), and yield of rice(YLD) as r=-0.803~-0.828(p<0.001) and have no effect on the appearance quality of rice. $EC_w$ indicating salt content showed strongly negative correlation with MTR, TGW, number of grains per panicles(NGP), and number of panicles per unit area(NPM) as r=-0.759~-0.798, and with YLD as -0.753.

Quality Breeding Outcome and Outlook in Coarse Grain Crops (잡곡의 품질개량 육종 성과와 전망)

  • Choi Byung Han
    • Proceedings of the Korean Society of Crop Science Conference
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    • pp.22-34
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    • 1998
  • Coarse grain crops including maize, sorghum, buckwheat, fox-tail millet, pearl millet, proso millet and barnyard millet have been used as health food, feed and industrial materials in Korea for a long time. Korean ancestors thought and treated them as the very important good crops for human health and the crops have served as a dish made with all the grains, particularly in January 15 of the lunar month in korea because the grains make the five viscera of heart, liver, spleen, lungs and kidneys and the six entrails of gall bladder, stomach, small and large intestines, the paunch, the bladder, and the bowels strong and build healthy body. Thus, the objectives of the paper were to review and summarize the results obtained from the quality breeding and functional researches worldwide on nutrition, utilization and medical action of the coarse grain crops. Maize grain, fresh ear and green fodder yields have increased since 1960s in Korea. Agronomic traits improvements also occurred for cold tolerance, disease and insect resistance, resistance to barrenness, resistance to loding, pollen production, grain and seed yields, and eating quality. For buckwheat, improved summer buckwheat varieties produced more rutin for vegetable and grain than autumn varieties in Korea

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A study of the relations between the Silver halide Grain structure in Emulsion and the Granularity (유제중의 AgX grain의 형태와 입상도에 관한 연구)

  • JeWungOh
    • Journal of the Korean Printing Society
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    • v.8 no.1
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    • pp.21-53
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    • 1990
  • In analysing the Image quality, one of the most important things to be considered is the granularity at a given emulsion speed. To enhance the image quality, the granularity should be lowered by the suitable methods, such as controlling the design of emulsion, grain size and structure, the distribution state of grains in the emulsion, etc. In this paper, the relations between the AgX grain structure and granularity are studied as a way of lowering granularity. According to the results, it is found that the grain structure is a very important factor for determining the granularity characteristics.istics.

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Influence of Ripening Stages on the Quality of Whole Crop Silage and Grain Silage of Fodder Rice

  • Maruyama, S.;Yokoyama, I.;Asai, H.;Sakaguchi, S.;Ohtani, T.;Yokota, H.;Kita, K.
    • Asian-Australasian Journal of Animal Sciences
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    • v.18 no.3
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    • pp.340-344
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    • 2005
  • In high-income Asian countries like Korea and Japan, per capita rice consumption has declined because of the change in consumer' favorite foods from rice to high-cost quality foods. This has forced farmers to reduce rice production. Although fodder rice could be another option to be cultured by farmers, available information concerning rice grain silage has been limited. In the present study, therefore, the difference in the quality of fodder rice silage prepared from either whole crop or grain at different ripening stages was compared. Various supplements were also added into whole crop and grain silages of fodder rice before ensiling, and thereafter, the palatability of prepared silages was determined by beef cattle. At ear emergence stage, the pH values for both grain and whole crop silages were approximately 4.5. In both grain and whole crop silages, the pH values were significantly increased by progressing ripening stages from milk-ripe stage to yellow-ripe stages, and the increase in pH value for grain silage was faster than that for whole crop silage. In the grain silage, the higher lactic acid (LA) content in grain silage seemed to be, the lower pH value was. Both in grain and whole crop silages, pH was significantly decreased by supplementation with LA bacteria. There were no significant differences in feed intake among any treatment groups.

An Evaluation Study on Total Nitrogen(T-N) Item of Agricultural Water Standards (농업용수 수질기준 T-N 항목에 대한 검증 실험( I ))

  • Choi, Seon-Hwa;Kim, Ho-Il;Kim, Min-Ho;Lee, Byeon-U;Lee, Bong-Hun
    • Journal of The Korean Society of Agricultural Engineers
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    • v.46 no.1
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    • pp.99-105
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    • 2004
  • The present agricultural water quality standards are set by a policy goal. This is intended for water quality management of public water resources, but not for the use of water resources. These standards were not determined by considering the influence of water quality on the safety of agricultural produce and the growth, yield and quality of agricultural crops. Thus, this study was carried out to investigate the influence of irrigation water quality on the growth, yield, and grain quality of rice and acquire fundamental knowledges to set up irrigation water quality standards. The pot experiment was conducted with 4 treatments using irrigation waters with various total nitrogen concentrations (control, 1, 5, 10, 20mg/L) and replicated four times with randomized block design. The results of this study showed that plant height, number of tiller, plant dry weight, the uptake of N, P, and K, and rice protein contents tended to increase as the T-N concentration in irrigation water was increased. In addition, grain yield at T-N 20 mg/L was significantly higher than in the control, but the percentage of head rice was slightly lower due to the increase of green kernel and white belly/core kernel.