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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Journal of Crop Science
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Journal DOI :
The Korean Society of Crop Science
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Volume & Issues
Volume 61, Issue 1 - Mar 2016
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Studies on the Degree of Polymerization of Amylopectin and Texture Analysis Test of Brown Rice After Germination
Lee, Kyung-Ha ; Yoon, Soon-Duck ; Lee, Jeong-Heui ; Won, Yong-Jae ; Choi, Induck ; Park, Hye-Young ; Woo, Koan-Sik ; Oh, Sea-Kwan ;
Korean Journal of Crop Science, volume 61, issue 1, 2016, Pages 1~8
DOI : 10.7740/kjcs.2016.61.1.001
The objective of this study was to evaluate quality properties, including amylopectin content, and texture analysis of brown rice and germinated brown rice cultivars in Korea for rice processing products. The amylopectin short chain content of germinated brown rice was significantly higher than that of brown rice. Texture analysis test showed that germinated brown rice Jinbo had the lowest hardness and toughness as well as and highest stickiness and adhesiveness. The correlation between degree of polymerization of amylopectin and texture analysis was also evaluated. In particular, germinated brown rice, short-chain amylopectin showed a negative correlation with hardness and toughness, whereas long-chain amylopectin showed a positive correlation with hardness, toughness, and adhesiveness. These results indicate that there is a relationship between degree of polymerization and texture analysis.
Bakanae Disease Reduction Effect by Use of Silicate Coated Seed in Wet Direct-Seeded Rice
Kang, Yang-Soon ; Kim, Wan Joong ; Kim, Yeon Ju ; Jung, Ki-Hong ; Choi, Ul-Su ;
Korean Journal of Crop Science, volume 61, issue 1, 2016, Pages 9~16
DOI : 10.7740/kjcs.2016.61.1.009
To investigate the effect of soluble silicate zeolite dressing of the rice against bakanae disease, field trial in reclaimed land and in vitro were carried out. The coated rice seeds (SCS) which were dressed with the mixture of 25% silicic acids (binder), and the zeolite (coating powder). In wet direct seeding, uniform scattering of rice seeds on the soil surface and the better seedling establishment were shown in SCS treatment plots. The incidence of bakanae disease began from the mid tillering stage toward the heading stage. Around heading stage, the ratio of infected tillers reached its highest point by 9.9% in non-SCS treatment plots. While, in SCS treatment plots, the ratio of infected tillers was no more than 0.01%. The vitality of the pathogenic fungi of bakanae disease in the SCS and non-SCS samples were assessed. Samples were incubated for one week keeping proper humidity at
after inoculated with panicles of infected rice plants from experimental field plots. In non-SCS treatment, pinkish colonies were formed on the grain surface of panicle of infected plants, and mycelium, macro-conidia and micro-conidia were developed actively inside part of infected grain inoculated. While in SCS treatment, micro-conidia and mycelium were not survived and the growth of macro-conidia, mycelia were greatly inhibited and withered. Based on the results, it is concluded that the environmental friendly control of bakanae disease by use of SCS is possible and soluble silicate can be applied as agents for replacement of seed disinfection.
Analysis of Growth Characteristics and Yield Components According to Rice Varieties Between on Irrigated and Partially Irrigated Rice Paddy Field
Kim, Tae-Heon ; Hur, Yeon-Jae ; Oh, Seong-Hwan ; Lee, Ji-Yoon ; Cho, Jun-Hyun ; Han, Sang-Ik ; Lee, Jong-Hee ; Baek, Dongwon ; Song, You-Chun ; Choi, Weon-Young ; Nam, Min-Hee ; Park, Dong-Soo ; Kwon, Yeong-Up ; Shin, Dongjin ;
Korean Journal of Crop Science, volume 61, issue 1, 2016, Pages 17~24
DOI : 10.7740/kjcs.2016.61.1.017
Drought caused by global climate change is one of serious problems for rice cultivation. However, it was little reported the impact of drought on rice cultivation in Korea. In here, to assess impact of drought on rice varieties in Korean climate condition, growth characteristics and yield components of rice were compared on irrigated and partially irrigated rice paddy field. First, we have chosen 11 rice varieties including 'Saeilmi' and 'Shindongjin' which are widely cultivated in Korea. For partially irrigated rice paddy treatment, we have withheld irrigation from 25 days after transplanting and water supply was totally dependent on rainfall for rice cultivation. When we examined early plant height and tiller number of these varieties on partially irrigated rice paddy were reduced 1.6% to 18.4% and 10.4% to 33.1%, respectively, and these reduction rate were highly correlated with yield loss in our experimental conditions. Among rice yield components, panicle number was decreased 10.5% to 30.1% according to rice varieties and reduced panicle number was highly correlated with yield loss. Grain number per panicle, grain filling rate and 1,000 seeds weight did not have correlation with yield loss of rice varieties. These result means that growth stage, especially the tillering stage, is seriously affected by drought on rice cultivation in Korea. And we suggest that 'Saeilmi', 'Ilmi' and 'Ilpum' are good for rice cultivation on drought prone rice field in Korea.
Effects of Long-Term Fertilization on Rice Yield and Soil Chemical Properties in the Mid-Plain of Korea
Shon, Jiyoung ; Kim, Junhwan ; Kang, Shingu ; Shin, Seonghyu ; Shim, Kangbo ; Yang, Woonho ; Heu, Sunggi ;
Korean Journal of Crop Science, volume 61, issue 1, 2016, Pages 25~32
DOI : 10.7740/kjcs.2016.61.1.025
A long-term field experiment under different fertilization treatments had been conducted to explore the effects of rice yield and soil chemical properties from 1978 to 2008 in Suwon, Korea. The paddy was applied eight fertilization treatments which were F0 (no fertilizer), PK (phosphorous and potassium), NK (nitrogen and potassium), NP (nitrogen and phosphorous), NPK (nitrogen, phosphorus and potassium), NPKC (NPK with compost), NPKS (NPK with straw) and NPKL (NPK with lime). Results of 31 years experiment showed that yield index (the ratio of yield in each treatment to NPK) was the lowest in F0 (0.52) and the highest in NPKC (1.18). Yield index was gradually increased in NPKC but decreased in F0 and NK. The yield index of PK, NP, NPKS and NPKL were not changed long-term treatment. Soil acidity of NPKL showed the highest with pH 7.9, and that of other treatments ranged from pH 6.3 to 6.8. Available phosphorous content of soil was increased in all plots by long-term fertilization, was the highest in PK and NPKC. Soil organic matter was higher in NPKC (1.8%) and NPKS (1.8%) than other treatments (1.3~1.4%) in the early experiment, but that was remarkably increased in only NPKC (2.5%) according to annual long-term application. Thus we suggest that annual compost application with optimum NPK could make stable and sustainable rice production.
Effects of Elicitors on Seedling Growth, Total Polyphenol and Chlorophyll Content and Antioxidant Activity of Barley (Hordeum vulgare L.)
Salitxay, Timnoy ; Phouthaxay, Phonesavanh ; Pang, Yeoun-Gyu ; Yeong, Yu-Chi ; Adhikari, Prakash Babu ; Park, Cheol-Ho ;
Korean Journal of Crop Science, volume 61, issue 1, 2016, Pages 33~40
DOI : 10.7740/kjcs.2016.61.1.033
This study is focused on the evaluation of growth parameters, total polyphenol content (TPC), chlorophyll content as well as the DPPH (1,1-diphenyl-2-picryhydrazyl) free radical scavenging activity of young barley seedling (YBS) affected by elicitation. Salicylic acid (SA), methyl jasmonate (MJ), amino acid liquid fertilizer (ALF) and microbial metabolism activator (MMA) were used. Elicitation was conducted for two times and various concentrations were used in this study. The result revealed that, MJ 1 ml/L treated-YBS gave the longest seedling length of 1.33 cm, followed by the ones treated with SA 1.38 mg/L and ALF 2 ml/L, respectively. ALF 3 ml/L treatment gave the highest fresh weight of 10 seedlings, followed by MJ 5 ml/L and SA 13.8 mg/L treatment with 1.56 g, 1.55 g and 1.53 g respectively. SA 138.12 mg/L elicitor treated-YBS gave the highest Chl a, Chl b content of
, respectively while the highest carotenoid content was found in MJ ml/L treatment with
. Among elicitor treated-YBS, SA showed better TPC. The highest TPC was found in SA 1.38 mg/L treatment with 18.82 mg/g TAE. Likewise, SA 1.38 mg/L showed the highest DPPH free radical scavenging activity among all the treatments. However, the lowest TPC was found in ALF 1ml/L treated-YBS with 9.46 mg/g TAE, which was even lower than the control (14.31 mg/g TAE).
Evaluation of Maize Downy Mildew using Spreader Row Technique
Kim, Kyung-Hee ; Moon, Jun-Cheol ; Kim, Jae Yoon ; Kim, Hyo Chul ; Shin, Seungho ; Song, Kitae ; Baek, Seong-Bum ; Lee, Byung-Moo ;
Korean Journal of Crop Science, volume 61, issue 1, 2016, Pages 41~49
DOI : 10.7740/kjcs.2016.61.1.041
This study was conducted to evaluate maize downy mildew resistance using spreader row technique in Cambodia. A total of forty maize lines were used in this experiment. Seven Korean varieties and seven breeding lines showed high infection rates (80~100%) and highly susceptible (HS) to downy mildew disease in both spring and fall. Also most of nested association mapping (NAM) parent lines were highly susceptible (HS). Meanwhile three inbred lines, Ki3, Ki11, and CML228, showed highly resistant (HR) or resistant (R) in spring and moderately resistant (MR) in fall. These three lines were already known as resistant inbred lines against downy mildew disease. It appears that spreader row technique was suitable for selection of maize downy mildew resistance in Cambodia. The incidence of downy mildew was influenced by weather conditions, especially relative humidity and temperature. Among several inoculation methods to screen for downy mildew resistance, this spreader row technique is effectively and easily used in the field of Southeast Asia.
Effect of Seedling Age on Growth and Yield at Transplanting of Sorghum (Sorghum bicolor L. Moench)
Jo, Su-Min ; Jung, Ki-Youl ; Kang, Hang-Won ; Choi, Young-Dae ; Lee, Jae-Saeng ; Jeon, Seung-Ho ;
Korean Journal of Crop Science, volume 61, issue 1, 2016, Pages 50~56
DOI : 10.7740/kjcs.2016.61.1.050
Direct seeding of sorghum (Sorghum bicolor L. Moench) has a problem of low yield including poor establishment. This poor establishment results from poor quality seed, poor seedbed preparation, seedling pests, poor sowing technique and high soil temperature. This study sought to establish the age at which sorghum seedlings can be transplanted with minimal effects on grain yield. Transplants were raised in 128 nursery tray pot. Five seedling ages were established by transplanting at 10 (T10), 15 (T15), 20 (T20), 25 (T25) and 30 (T30) days after planting (DAP). The treatment combinations were arranged in a randomized complete block design and replicated three times with an individual plot size of
. Each plot had five ridges with a planting space of
at one plants per stand. Results showed that seedling age on transplanting significantly affected growths and yields to sorghum after transplanting. Plant heights and diameters of transplants at T15 were longer than the other transplants. Conclusively, The advantages of this practice were better control of crop density and greater yields; either to fill gaps after emerging and thinning of crops or to compensate for a growth period that was too short for a complete crop cycle.
Changes of Soyasaponin Contents in Soybean Sprouts
Chang, Seo-Young ; Han, Sangjun ;
Korean Journal of Crop Science, volume 61, issue 1, 2016, Pages 57~63
DOI : 10.7740/kjcs.2016.61.1.057
Soyasaponin I, II, III and V contents were investigated in seed, cotyledons and sprouts of soybean (Glycine max (L.) Merill) subjected to germination over five days. High-performance liquid chromatography coupled with tandem mass spectrometric (HPLC-MS/MS) method was used to evaluate the content of soyasaponins. Soyasaponins contents were different according to the varieties. Germination of soybeans dramatically increased soyasaponin contents in soybean sprouts in a time-dependent manner. Cotyledons had a higher contents of soyasaponins compared to dried seed (p<0.05). After five days of germination, Soyasaponin I and II increased 10 times higher after germination. Soyasaponin I and II are major metabolites in cotyledons and hypocotyls. Soyasaponin III and V were also detected in seed and increased depended on the germination stage. Soyasaponin V was at its highest levels in the hypocotyl, almost 7 times higher than the initial content in soybean seeds. Therefore, the germination of soybean sprouts significantly increased soyasaponin content.
Determination of Fatty Acid Composition in Peanut Seed by Near Infrared Reflectance Spectroscopy
Lee, Jeong Min ; Pae, Suk-Bok ; Choung, Myoung-Gun ; Lee, Myoung-Hee ; Kim, Sung-Up ; Oh, Eun-young ; Oh, Ki-Won ; Jung, Chan-Sik ; Oh, In Seok ;
Korean Journal of Crop Science, volume 61, issue 1, 2016, Pages 64~69
DOI : 10.7740/kjcs.2016.61.1.064
This study was conducted to develop a fast and efficient screening method to determine the quantity of fatty acid in peanut oil for high oleate breeding program. A total of 329 peanut samples were used in this study, 227 of which were considered in the calibration equation development and 102 were utilized for validation, using near infrared reflectance spectroscopy (NIRS). The NIRS equations for all the seven fatty acids had low standard error of calibration (SEC) values, while high R2 values of 0.983 and 0.991 were obtained for oleic and linoleic acids, respectively in the calibration equation. Furthermore, the predicted means of the two main fatty acids in the calibration equation were very similar to the means based on gas chromatography (GC) analysis, ranging from 36.7 to 77.1% for oleic acid and 7.1 to 42.7% for linoleic acid. Based on the standard error of prediction (SEP), bias values, and
statistics, the NIRS fatty acid equations were accurately predicted the concentrations of oleic and linoleic acids of the validation sample set. These results suggest that NIRS equations of oleic and linoleic acid can be used as a rapid mass screening method for fatty acid content analysis in peanut breeding program.
Estimating the Yield of Marketable Potato of Mulch Culture using Climatic Elements
Lee, An-Soo ; Choi, Seong-Jin ; Jeon, Shin-Jae ; Maeng, Jin-Hee ; Kim, Jong-Hwan ; Kim, In-Jong ;
Korean Journal of Crop Science, volume 61, issue 1, 2016, Pages 70~77
DOI : 10.7740/kjcs.2016.61.1.070
The object of this study was to evaluate the effects of climatic elements on potato yield and create a model for estimating the potato yield. We used 35 yield data of Sumi variety produced in mulching cultivation from 17 regions over 11 years. According to the results, some climatic elements showed significant level of correlation coefficient with marketable yield of potato. Totally 22 items of climatic elements appeared to be significant. Especially precipitation for 20 days after planting (Prec_1 & 2), relative humidity during 11~20 days after planting (RH_2), precipitation for 20 days before harvest (Prec_9 & 10), sunshine hours during 50~41 days before harvest (SH_6) and 20 days before harvest (SH_9 & 10), and days of rain during 10 days before harvest (DR_10) were highly significant in quadratic regression analysis. 22 items of predicted yield (
) were induced from the 22 items of climatic elements (step 1). The correlations between the predicted yields and marketable yield were stepwised using SPSS, statistical program, and we selected a model (step 2), in which 4 items of independent variables (
) were used. Subsequently the
were replaced with the equation in step 1,
. Finally we derived the model to predict the marketable yield of potato as below.