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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Crop Science
Journal Basic Information
Journal DOI :
The Korean Society of Crop Science
Editor in Chief :
Volume & Issues
Volume 50, Issue 6 - Dec 2005
Volume 50, Issue 5 - Dec 2005
Volume 50, Issue spc1 - Nov 2005
Volume 50, Issue 4 - Sep 2005
Volume 50, Issue 3 - Jun 2005
Volume 50, Issue 2 - Jun 2005
Volume 50, Issue 1 - Mar 2005
Selecting the target year
Applicability of Vegetation Index and SPAD Reading to Nondestructive Diagnosis of Rice Growth and Nitrogen Nutrition Status
Kim Min-Ho ; Shin Jin-Chul ; Lee Byun-Woo ;
Korean Journal of Crop Science, volume 50, issue 6, 2005, Pages 369~377
Precise application of topdressing nitrogen (N) fertilizer is indispensible for securing high yield and good quality of rice and minimizing N losses to the environment as well. For precise N management, growth and nitrogen nutrition status (NNS) should be diagnosed rapidly and accurately. The objective of the study was to evaluate the applicability of vegetation index (VI) calculated from hyperspectral canopy reflectance measurement and SPAD reading to nondestructive in situ diagnosis of growth and NNS of rice. Canopy reflectance, SPAD reading, growth parameters, and NNS characteristics were measured from various N treatments to evaluate the relationships among them for two cropping seasons from 2001 to 2002. The correlation coefficient of VIs with variables of growth and NNS increased positively as rice canopy became more closed. Regardless of growth stages, VIs had significantly high correlations with LAI, shoot dry weight (DW), shoot N content and nitrogen nutrition index (NNI). Those correlation coefficients increased steadily before heading stage as rice grew up. However, tiller number and leaf N concentration showed significantly high correlations with VIs only at and after panicle initiation stage (PIS). Among the VIs, RVIgreen had significantly higher correlation with the measured parameters than the other VIs: it showed correlation coefficients greater than 0.8 with leaf and shoot N concentration and DW, and much higher coefficients greater than 0.9 with LAI, shoot N content, and NNI. At LAI of below 2.5, VIs had non-significant or low correlations with the growth and NNS indicators due to the background effects. SPAD reading had significantly high correlation with leaf N concentration and NNI at each growth stage. In addition, it had significant correlations with variables of growth and NNS at PIS and booting stage, particularly, at booting stage. Though SPAD reading had a significantly high correlation value at a given growth stage in each year, it showed very weak relationship with variables of growth and NNS when pooled across growth stages and years. In conclusion, RVIgreen was found to be the most reliable VI to estimate the growth and NNS of rice around at PIS, but SPAD reading had much limitations.
Varietal Difference in Enzyme Activities during Preharvest Germination of Rice
Ko Jong-Cheol ; Kim Bo-kyeong ; Lee Kyu-Seong ; Choi Weon-Young ; Choi Heh-Ran ; Cho Eun-Ae ; Yu Song-Joong ;
Korean Journal of Crop Science, volume 50, issue 6, 2005, Pages 378~383
This study was conducted in order to examine relationships between the viviparous germination ability and the antioxidative system in rice seeds and seedlings. Enzyme activities was compared among the four varieties with different viviparous germination ability from the early or mid-late maturity group.
-Amylase activities correlated with the viviparous germination rate (VGRs) and
-amylase activity in seeds of 40 days after heading (DAH) was highest in Dongjinbyeo among midlate maturing varieties (MLMVs) and in Daeseongbyeo among EMVs.
-Amylase activity in dry mature seeds was also higher in varieties with higher VGR. Glucose contents in viviparously germinating seeds and mature dry, seeds were higher in varieties with higher VGRs. Cat-alase activities did not correlate with the VGRs in both maturity groups. However, peroxidase activities in viviparously germinating seeds were higher in varieties with higher VGRs.
Difference of Sugar and Starch Content during Germination of the Rice Cultivar Suitable for Direct-Seeding
Park, Kwang-Ho ;
Korean Journal of Crop Science, volume 50, issue 6, 2005, Pages 384~386
This research was conducted to determine the contents of sugar and starch between rice cultivar, ASD1 being with high seedling establishment under direct seeding cultivation and IR72 being with poor seedling establishment. The ASD1 rice cultivar was higher in sugar and starch contents than those of IR72 during germination. This result was proven to the previous research output with high seedling establishment in direct seeding condition as well.
Changes of Soil Nitrogen Supply and Production of Upland Forage Crops by Cattle Manure during Conversion from Paddy to Upland Condition in Paddy Field
Seo Jong-Ho ; Kim Sok-Oong ;
Korean Journal of Crop Science, volume 50, issue 6, 2005, Pages 387~393
The effect of cattle manure with the rates of 2 and 4 ton
for winter rye and summer corn cultivation, respectively, on the dry matter (DM) yield and nitrogen (N) uptake were investigated during successive threeyear conversion period from paddy to upland condition in paddy field. The changes in soil properties and soil N supplying capacity during repetitive manure application were a1so examined. Growth and DM yield of upland forage crops, especially. winter rye were hindered highly by poor soil condition in the first year after conversion from paddy to upland condition, so apparent recovery of cattle manure N by crops was very low in the first conversion year. But, DM yield and N uptake of upland forage crops were increased linearly by accumulative input of cattle manure along with mineral N enrichment in soil, which also increased apparent recovery of cattle manure-No It seemed that those increases were mainly due to the improvement of soil properties such as soil mineral N, soil organic matter (soil carbon), potentially mineralizable N and bulk density by accumulative input of cattle manure rather than the increase of soil N supply according to accumulative conversion period from paddy to upland condition. It was derived that conversion period from paddy to upland condition over 2 years is needed to obtain proper DM yield in paddy field and accumulative inputs of cattle manure during the conversion period is more influential to the continuous increment of DM yield and N uptake of upland crop as well as of potential N supplying capacity of soil.
Determination of Calibration Curve for Total Nitrogen Contents Analysis in Fresh Rice Leaves Using Visible and Near Infrared Spectroscopy
Kwon Young-Rip ; Baek Mi-Hwa ; Choi Dong-Chil ; Choi Joung-Sik ; Choi Yeong-Geun ;
Korean Journal of Crop Science, volume 50, issue 6, 2005, Pages 394~399
Near Infrared Spectroscopy (NIRS) has been used as a tool for the rapid, accurate and nondestructive assay of the fresh rice leaf in nitrogen content. NIRS used in this study was visible and near infrared spectroscopy type instrument, Foss model 6500. To obtain a useful calibration equation, standard regression between the data was analyzed by chemical analysis and by NIRS method. Accuracy of calibration equation for nitrogen content on fresh leaf of rice were 0.879, 0.858 and 0.819, respectively. Accuracy of calibration equation after outlier treatment increased as 0.017, 0.02 and 0.061 improved each with 0.896, 0.878 and 0.880, respectively. Calibration equation combined using merge function after accuracy of calibration equation more increased by 0.911. Difference analysis value between calibration equation and lab value by kjeldahl showed
. With this as same result is the possibility of closing the deterioration of the sample in order to omit a construction and pulverization process it is judged with the fact that the nitrogen content measurement of the fresh rice leaf which the possibility of reducing an hour and an expense is by a near infrared spectroscopy technique will be possible.
Effects of Hypoxia on Root Growth and Anaerobic Fermentative Enzymes in Winter Cereal Seedlings
Park Myoung Ryoul ; Lim Jeong Hyun ; Yoo Nam Hee ; Kwon In Sook ; Kim Jung Gon ; Choi Kyung Gu ; Yun Song Joong ;
Korean Journal of Crop Science, volume 50, issue 6, 2005, Pages 400~405
Wet-injury often occurs in upland cereals growing in the paddy field due to oxygen deficiency in the rhizosphere caused by excessive water in the soil. Under hypoxia, energy metabolism is diminished causing nonreversible damage to root cells. This study was conducted to investigate effects of hypoxia on root growth and enzymes involved in the fermentative energy metabolism in upland cereals including barley, wheat, rye and triticale. Young seedlings were subject to hypoxia for up to 7 days. Root fresh weight and dry weight were decreased significantly by hypoxia for 5 to 7 days in all cereal seedlings. Root growth retardation under hypoxia was lowest in barley. Hypoxia-induced increases in activity and isozyme expression of alcohol dehydrogenase (ADH) and lactate dehydrogenase (LDH) were commonly observed in roots of all cereal seedlings. The inherent ADH activity levels were higher in barley but the hypoxia-induced increases in ADH activities were lowest in barley than other cereals. The inherent LDH activity levels were lower in barley and the hypoxia-induced increases in LDH activities were lower in barley than other cereals. The results suggest the importance of the rapid enhancement of fermentative enzyme systems for increased tolerance to hypoxia.
Optimal Desiccation Condition and Moisture Content of Dehisced Seeds of Ginseng (Panax ginseng C.A. Meyer) for Cryopreservation
Yoon Ju-Won ; Kim Haeng-Hoon ; Lee Jang-Hoo ; Choi Jin-Kook ; Lee Sung-Sik ; Choi Yu-Mi ; Kim Tae-San ;
Korean Journal of Crop Science, volume 50, issue 6, 2005, Pages 406~410
This study was conducted to establish the efficient protocols of the germination and cryopreservation of dehisced Korean ginseng seeds for long-term germplasm conservation.
and BA treated on seed for 24 hr facilitated germination at 5 and
. Germination percentage of desiccated seeds was decreased under moisture content (MC) of below
. Dehisced ginseng seeds were dried under airflow of laminar floor cabinet and seed drying room. The high levels (more than
) of germination after cryogenic exposure were obtained after drying under vertical airflow of laminar floor for 12-30 hours (MC
). Decrease in germination percentage of ginseng seeds due to desiccation damage and freezing injury was observed at MC of below
and of above
, respectively. Therefore, MC of ginseng seeds need to be controlled with a range of
to avoid damages from both desiccation and freezing.
Effects of Alternative Planting of Cultivars on Photosynthetic Ability and Yield in Soybean
Kim Ik Je ; Son Seok Yong ; Ryu In Mo ; Lee Ki Yeol ; Yun Tae ; Lee Cheol Hee ; Park Seong Kyu ;
Korean Journal of Crop Science, volume 50, issue 6, 2005, Pages 411~414
The purpose of this study was to determine proper method for alternative row culture of two varieties to increase seed yield in soybean. The test varieties 'Hwangkeumkong' and 'Taekwangkong' which were planted monoculture of each variety, seeding after mixing same number of seeds of two varieties, 1-row alternation, 2row alternation, 2-row 'Hwangkeumkong' and 1-row 'Taekwangkong' and 1-row 'Hwangkeumkong' and 2row 'Taekwangkong'. Alternative planting of 1-row 'Hwangkeumkong' and 1-row 'Taekwangkong' resulted the highest canopy height and reduced lodging most effectively. The terminal and the 9th leaves of 'Taekwangkong' in alternative variety planting showed the higher photosynthetic ability than pure stand of that. Alternative planting of two varieties in every other row increased yield by
in 'Hwangkeumkong' and by
Light Quality on Nutritional Composition and Isoflavones Content in Soybean Sprouts
Chi Hee Youn ; Roh Jae-Seung ; Kim Jung Tae ; Lee Sun Joo ; Kim Mi Jung ; Hahn Sang Joon ; Chung Ill Min ;
Korean Journal of Crop Science, volume 50, issue 6, 2005, Pages 415~418
This objective of this study was to determine the characteristics of nutrition and isoflavone under light with soybean sprouts. Crude protein and crude fat content in green soybean sprouts were higher than common soybean sprouts. Aspartic acid and vitamin
, C and E content in green soybean sprouts were much higher than general. Green soybean sprouts had crude fiber content slightly larger than normal. Mineral and vitamin C content in isomeal were three to five times larger than aspameal. Daidzein content in green soybean sprouts was 82.3 times larger than soybean seed. Also genistein content was increased 17.5 times.
Comparison of Physico-Chemical Properties between Waxy and Non-waxy Wheat Grains
Lee Choon-Ki ; Nam Jung-Hyun ; Kang Moon-Seok ; Ku Bon-Chol ; Park Kwang-Keun ; Kim Jae-Cheol ; Son Young-Koo ; Park Jeong-Hwa ; Lee Yeong-Ho ; Son Jong-Rok ; Min Young-Kyoo ;
Korean Journal of Crop Science, volume 50, issue 6, 2005, Pages 419~427
For the purpose to verify the physicochemical properties of Korean waxy wheat, comparative analyses between waxy wheat lines and their respective maternal parents were performed on mixing and pasting properties, and flour particle sizes. The particle sizes of waxy wheat flour were significantly larger than those of their parents when milled in a same condition. Although the protein contents of flour in waxy wheat lines tested were high as much as those of bread wheat, the quality parameters showed lower baking uses based on sedimentation volumes and mixing characteristics. Waxy flour required more water than non-waxy flour to obtain the proper mixogram. Waxy wheat flour showed more or less higher onset pasting temperatures and much higher breakdown viscosities than their respective parent flour in the Rapid Viscograph test. Moreover, peak viscosity temperatures and final viscosities were dramatically reduced in waxy wheat lines by showing
and 101 116.9 RVU, respectively, compared to their parents in that the temperatures above
and the viscosity ranges of 148 -171.8 RVU.
Comparison of Grain and Milling Properties between Waxy and Non-waxy Wheat
Lee Choon-Ki ; Nam Jung-Hyun ; Kang Moon-Seok ; Ku Bon-Chol ; Park Kwang-Keun ; Kim Jae-Cheol ; Son Young-Koo ; Park Jeong-Hwa ; Lee Yeong-Ho ; Son Jong-Rok ; Min Young-Kyoo ;
Korean Journal of Crop Science, volume 50, issue 6, 2005, Pages 428~434
For the purpose to verify the grain and evaluate milling properties of Korean waxy wheat, comparison analysis between waxy wheat lines and their respective maternal parents were performed. The waxy lines showed various grain yields of 4.76
5.79 t/ha depending on parentages, which were corresponding to
levels of their respective maternal parents. One thousand grain weights of waxy lines were also lighter than its respective part in its parentage by exhibiting 32.8
34.6 g compared to 32.9
45.2 g of their parents. Test weights of waxy lines and their parents were 720
798 g/l and 786
797 g/l, respectively. The proportions of the grains above 2.5 mm in width were higher in order of Keumgang, Olgeuru, Geuru, SW97134, Suwon 292, Woori, SW97105, and SW97110. Waxy lines exhibited low milling properties by showing the straight flour yields ranging from
compared with the yields of their parents ranging from
; the waxy lines were significantly lower in first break flour (Bl) and first reduction flour (Rl) yields in the Buller test mill, while significantly higher in the yields of second and third reduction flour (R2 and R3) than the respective ones of their parent wheat.
Optimum Transplanting Date for Production Quality Rice in Honam Plain Area
Choi Weon-Young ; Nam Jeong-Kwon ; Kim Sang-Su ; Lee Jun-Hee ; Kim Jae-Hyun ; Park Hong-Kyu ; Back Nam-Hyun ; Choi Min-Gyu ; Kim Chung-Kon ; Jung Kwang-Yong ;
Korean Journal of Crop Science, volume 50, issue 6, 2005, Pages 435~441
This experiment was conducted to identify the proper time of transplanting at Iksan plain area in Honam area from 2002 to 2004. The rice cultivars tested were Samcheonbyeo, Nampyeongbyeo and Hwaseongbyeo. The results are summarized as follows: The number of spikelets were most when transplanted on May 30 in all maturing types at southern plain. The ripened grain rates vary depending on location and transplanting dates. The proper time of transplanting for both of Samcheonbyeo and Nampyeongbyeo was between May 30 to June 9 and May 30 or later for Hwaseongbyeo. The highest head rice yield was obtained when transplanted on June 9 regardBess of the maturing types. The optimum transplanting dates according to maturing types with respect to the yield of head rice, ripened grain rates and the quality for both early and medium type was between May 30 to June 19, for mid-late type between May 30 to June 9.
Difference in Volatile Flavor Components among Milling Fractions of Wheat
Han Ouk-Kyu ; Kim Yang-Kil ;
Korean Journal of Crop Science, volume 50, issue 6, 2005, Pages 442~446
This study was conducted to obtain basic information on the utilization of wheat flour for good organoleptic evaluation score. Wheat seed was milled by Buhler test mill. Volatile flavor compounds of five milling fractions such as Break
, Reduction I (
), Reduction II (
), Bran and Short were determined and their differences were discussed. There was significant difference in quantity of flavor compounds but no difference in qualitative composition among milling fractions. The outer layer of wheat endosperm (
layer) showed higher amount of m-xylene and n-butanol in volatile flavor compounds compared with inner endosperm layer (
layer showed quantitatively higher composition of major flavor compounds than inner endosperm layer (
). This result points out that the
layer exhibited stronger flavor than
, and Rl layers.
Classification of Japonica Varieties by Volatile Component Patterns of Milled and Cooked Rice Using Electronic Nose
Song Jin ; Son Jong-Rok ; Park Nam-Kyu ; Cho Hae-Young ; Chang Kyu-Seob ;
Korean Journal of Crop Science, volume 50, issue 6, 2005, Pages 447~452
This study was performed to investigate the differences among the 44 varieties of Japonica rice by using the electronic nose. The volatile patterns of milled rice and its cooked rice were generated by twelve metal oxide sensors (MOS). The MSO responses were evaluated by principal component analysis and cluster analysis. Milled rice was classified into three groups; Group I included most of varieties, Group II was Daejinbyeo, Chucheongbyeo, and Group III was Mangumbyeo, Nampyeongbyeo, Shindongjinbyeo. But the discrimination of cooked rice was not identified. Also the result of correlation analysis appeared that the volatile of milled rice was not significantly related to that of cooked rice. Electronic nose system was considered as not depend on our study results sufficient to predict the volatile pattern of cooked rice.
Development of RAPD Marker Related to Brown Planthopper Resistance Gene Derived from Rice Cultivar, Cheongcheongbyeo
Seo Ji-Hun ; Kim Kyung-Min ; Kim Suk-Man ; Sohn Jea-Keun ;
Korean Journal of Crop Science, volume 50, issue 6, 2005, Pages 453~456
This study was carried out to select DNA markers closely linked to brown planthopper (BPH) resistance gene originated from a rice cultivar 'Cheongcheongbyeo'. For the mapping of resistant gene to BPH, a doubled-haploid (DH) population was developed by anther culture of
plants from a cross 'Cheongcheongbyeo/Nagdongbyeo'. In BPH bioassay and marker screening for the DH population, the segregation of resistant and susceptible plants to BPH fitted to a 1:1 ratio. A total of 310 RAPDs of 520 markers showed polymorphism in parental survey using 'Cheongcheongbyeo' and 'Nagdongbyeo'. In the analysis of relationship between BPH resistance and marker pattern for 40 DH lines, the OPE16 produced a specific dominant fragment, 700 bp, which was closely linked with BPH resistance gene of 'Cheongcheongbyeo'. Based on the linkage analysis using 7 markers, BPH resistance of 'Cheongcheongbyeo' was mapped on chromosome 12, which was closely linked with
at a distance of 4.6 cM.
Functions and Metabolic Pathway of Ascorbic Acid in Plant
Park Yang-Ho ; Lee Ju-Young ; Jang Byoung-Choon ; Lee Ki-Sang ;
Korean Journal of Crop Science, volume 50, issue 6, 2005, Pages 457~461
During the last few years, considerable progresses have been made in understanding of roles and biosynthesis of ascorbic acid (AsA) in plants. The concentrations of ascorbic acid is 2-4 mM in leaf cells, but much higher at the chloroplast. There are three forms of ascorbic acid in the plant mainly ascorbic acid (AsA), monodehydroascorbic acid (MDHA) and dehydroascorbic acid (DHA). AsA in plant cell performs antioxidants by changing those three forms. And AsA promotes cell division and elongation There was new pathway of ascorbic acid metabolism. It is called pathway of Smirnoff-Wheeler. This report will provide understanding of AsA in plants, and also provide