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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of The Korean Society of Grassland and Forage Science
Journal Basic Information
Journal DOI :
The Korean Society of Grassland and Forage Science
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Volume & Issues
Volume 15, Issue 4 - Dec 1995
Volume 15, Issue 3 - Sep 1995
Volume 15, Issue 2 - Jun 1995
Volume 15, Issue 1 - Mar 1995
Selecting the target year
Studies on Development of Antagonistic Microorganism by Cell Fusion - Biological control of disease - )
Journal of The Korean Society of Grassland and Forage Science, volume 15, issue 1, 1995, Pages 1~12
This study was to investigate an effective biological control of forage diseases and provide a basic data and a model in improving variety of antagonistic bacteria, with growth promoting effect on forage, through cell fusion. The results obtained were summarized as follows; 1. The antagonistic himbacterium against soil-borne phathogenic fungi Fusarium oxysporum and Rhizoctonia solani was isolated from continuous cropping himsphere soil of forage, and its biological and physiological characteristics were investigated. This bacterium was identified as Bacillus subrilis and named BS 101. Another strain for cell fusion was Bacillus thur ingiensis ssp. kurstaki HD-I(BT 37669) with insecticidal crystal. 2. The auxotropic mutants of BS 101 and BT 37669 were derived after mutagenesis using N-methyl-N'nitro- Nitrosoguanidine(NTG) to give amino acid requirement marker. n e s e auxotropic mutants of BS 101 and BT 37669 were named BS 1013(his-) and BT 69(asp-), respectively. 3. The best protoplast requirement was obtained using DM 3 medium, containing 5% casamino acid, 1 M
and 2% bovine semm albumin, to give Fusant 3, 7 and 8. BT toxin gene was not identified with fusants by Southern blotting. However, SDS-PAGE analysis of strains showed various protein patterns among fusants. 4. From the dark culture experiment, growth of forage in inoculated soil with antagonistic bacteria was delayed than that of non-inoculated soil with antagonistic bacteria in each continuous cropping soil and in each sterilized soil. On the other hand, growth duration of forage was different between continuous cropping soil and sterilized soil. 5. Seed germination of Alfalfa, Italian ryegrass and Orchardgrass were significantly improved by inoculation of antagonistic bacteria(p< 0.05).
Cotylodon Development and Seeding Growth of Lotus corniculantus , Lotus tenuis and Their Reciprocal Hybrids
S. N. Hur ; P. R. Beuselinck ; C. J. Nelson ;
Journal of The Korean Society of Grassland and Forage Science, volume 15, issue 1, 1995, Pages 13~18
Seedling development among reciprocal FI hybrids and their parents, Lotus comiculatus and L renuis, were studies using a simple method of measuring cotyledon area. Cotyledon area attached to the plant could be measured with simple rapid method. Cotyledons expanded very rapidly during the first week, then slightly expanded until maximum size was reached around 3 weeks after emergence. Cotyledon area upon emergence was correlated with seed size (P=0.05), but after emergence there was a divergence in cotyledon expansion rate. Rapidity of photosynthetic area development was determinant factor for seedling growth of trefoil species. 2
m2 and 1
m2 among the hybrids promised the possibility increasing seedling vigor of birdsfoot trefoil.
Cotyledon and Leaf Development Associated with Seeding Vigor of Six Forage Lerumes
S. N. Hur ; C. J. Nelson ;
Journal of The Korean Society of Grassland and Forage Science, volume 15, issue 1, 1995, Pages 19~23
Cotyledon and leaf development of six important forage legums were compared to study their contribution to the seedling growth, Cotyledons of forage legumes expanded their size rapidly during one week maximum size was reached and entered senescence. Larger seeds produced greater colyledon area, and speed of colyledon expansion was closely associated with seedling growth. Earlier onset leaf production and earlier leaf development were major determinant factor initial seedling growth. Alfalfa and red clover which have larger seeds were good in seedling vigor with larger photosynthetic area. Alsike clover and white clover with small seeds showed also good seedling vigor, as they developed leaves early with relatively high photosynthetic rate. On the other hand, though lespedeza has heavy seeds, its seedling vigor was very poor with slow photosynthetic area development and low photosynthetic rate.
Comparative Studies of Optimum Utilization Methods by Pasture Types
Journal of The Korean Society of Grassland and Forage Science, volume 15, issue 1, 1995, Pages 24~29
This experiment was canied out to select the optimum utilization method by various pasture types at National Livestock Research Institute, Suwon in 1992 and 1993. Tne main plot was two pasture types. wfiich were mainly top-grass(orchardgrass dominated pasture) and mainly bottom-grass(perennial ryegrass dominated pasture), and the subplot was three pasture utilization methods (grazing, grazing after the 1st cutting, and alternate utilization of cutting and grazing). Average dry matter yields of pasture were not affected by pasture types, but there was significant difference(p <0.05) by pasture utilization methods. Daily DM production of pasture was increased with alternate utilization of cutting and grazing at two pasture types. Also, pasture availability is increased by mainly top grasses and alternate utilization of cutting and grazing. Soil phsical chracteristics are improved by alternate utilization of cutting and grazing. According to the results obtained from this experiment, it is suggested that alternate utilization of cutting and grazing is effective for dry matter yield, pasture availability and soil phsical characteristics regardless of pasture types in Korea
Harvest Yield and Growth Response White Clover Cultivars to Infrequent , Frequent Defoliation and Their Alternation
;;Geoffrey E. Brink;
Journal of The Korean Society of Grassland and Forage Science, volume 15, issue 1, 1995, Pages 30~36
Pasture composed of about 30% botanical composition of white clover (Trijolium repem L.) is desirable in its productivity and quality. To get information on maintaining its productivity in the pasture, the experiment was canied out to determine the effect of infrequent, frequent defoliation or their alternation on change of its harvest yield and growth. Individual plants of Regal, Louisiana S-1, Grasslands Huia and Aberystwyth S184 were grown in 22cm plastic pot containing a 2 : 1 : 1 soil : sand : Peat moss mixture for 27 days after transplanting 50day seedlings raised on 3cm pots, and then all their fully expanded leaves are removed. Defoliation treatments were forced every 1 (CC, frequent), 4 week (RR, infrequent) or their alternations (CR, RC) after 8 weeks from the removal. To analyze the treatment effects, plants were sampled on 0 (the removal day), 4, 8, 12 and 16 weeks after the removal and seperated to leaves, petioles, stolons and roots. Each harvest yield of infrequent defoliation (RR) was higher than that of frequent defoliation (CC). Their alternations (RC, CR), however, forced fluctuation of the yield according to defoliation interval. Fraction weights from their altemations showed intermediate ones of infrequent and Frequent defoliation whose weights did the similar result to their harvest yields. Fraction and total dry weights per plant, shoot/root ratio were changed by relative span of defoliation interval, which resulted from the weights of leaves and petioles, removed parts. Root and total dry weight per plant of Regal were greater than the other cultivm in infrequent defoliation interval regardless of continuous or alternations. Productivity of white clover in pasture, therefore, can be controlled by alternation of infrequent and frequent defoliation or reverse.
Studies on the Seeding and Harvesting Dates of Early and Late Maturing Varieties of Forage Rye III. Analysis of growth influenced by seeding and harvesting dates
Journal of The Korean Society of Grassland and Forage Science, volume 15, issue 1, 1995, Pages 37~42
This experiment was canied out to study the effects of seeding and harvesting dates on the growth of early and late maturing rye(Seca1e cereale L.) varieties at the forage testing field of S.N.U., Suweon, from September 1986 to May 1989. Leaf and tiller numbers of rye per plant were increased with earlier seeding date, but no difference in the tiller numbers was found between harvesting dates of early and late maturing rye varieties. Tiller dry weight of an early maturing rye veriety, Wintermore was higher than that of a late maturing rye variety, Kodiak when sown as early as September. Maximun leaf area index(LA1) and leaf area index duration(LA1D) were achieved with earlier seeding and early maturing rye varieties. A higher correlation between the maximum LA1 or LAID and dry matter accumulation of rye varieties was observed in this experiment.
Effect of Application Rates of Mineral N and Cattle Slurry on the Dry Matter Yield and Botanical Compositions of Orchargrass Sward
Journal of The Korean Society of Grassland and Forage Science, volume 15, issue 1, 1995, Pages 43~51
Tlis experiment was to study the effects of application rates of mineral N and cattle slurry on the dry matter yield and botanical compositions of Orchardgrass sward grown in 4 cuttings in a year. Annual rates of mineral N of O(
) and 360kg/ha((
) were applied as urea, and cattle slurry applied at rates of O((
), suppling 120kg, 240kg and 360kgl ha, respectively. The results were summarized as follows; 1. The limiting annual application rates of mineral N and cattle slurry was estimated about 120kg/ ha. 2. The growth of Orchardgrass after the 3rd cut was decreased by summer depression. Consequently, the botanical compositions of Orchardgrass showed only 7.7% and 4.0% in 3rd and 4th cut, respectively. However, the 15 and 17 species of weeds originated in 3rd and 4th cut. 3. The botanical compositions of Amaranthus mangostanus in 3rd cut and Portulacea aleracea in 4th cut were greatly increased with application rates of cattle sluny. 4. Relative efficiency of cattle sluny for the dry matter production of Orchardgrass as compared to mineral N were 93.396, 99.5% and 113.6% in 120kg, 240kg and 360kglha at rates of cattle slurry, respectively.
Effect of Cattle Slurry on the Soil Charaters and Production of Forage Crop
Journal of The Korean Society of Grassland and Forage Science, volume 15, issue 1, 1995, Pages 52~60
This experiment was carried out to determine the effect of nitrogen application level of cattle sluny(T1:150, T3:250, T53.50 kglha) and chemical fertilizer(T2:150, T4:250, T6:350 kg/ha) on the growth characteristics, dry matter yield and chemical soil property of Sorghum-Sudangrass hybrid [Sorghum bicolor L. Moench]. The results obtained are summarized as follows: Mean stem diameter was significantly increased by increasing nitrogen application level of cattle slurry and chemical fertilizer. Especially, T6 treatment was the highest as 11.1 mm, while T1 treatment w a the lowest as 0.3 mrn. According to the same level of nitrogen application, cattle slurry treaunent(T1, T3 and T5) were showed a lower mean stem hardness than chemical fertilizer treatment(T2, T4 and T6). Especially, T3 treatment was the softest at 0.7 kg/
. The dead stubble and tiller number were increased by increasing nitrogen level of cattle slurry and chemical fertilizer(P
Dry Mater Yield and Chemical Composition of Spring Oats at Various Stage of Growth
Journal of The Korean Society of Grassland and Forage Science, volume 15, issue 1, 1995, Pages 61~66
This experiment was conducted to evaluate the effect of the various stage of growth on dry matter yield and chmical composition of forage oat(Avena sativa. L.). Seeds were planted on March 13 1993 on the Livestock Experimental Farm Keiymung junior college at keongsan Keongsangbukdo. Oat plant were harvested at various stages of maturity while the oat was in the premature stages. 1. Whole plant dry matter increased with advancing maturity. It was 11.8, 12.3, 14.9, 25.6 and 28.8% at before flag leaf emerged, flag leaf emerged, heads emerged, milk and dough stage., respectively. Dry matter increased very little during from before flag leaf emerged to heads emerged, after which it increased rapidly until the plant was dough stage. 2. Leaf weight ratio decreased with advancing maturity from before flag leaf emerged to dough, varied fmm 58 to 1 1%. Grain(with lemma, palea) increased with advancing maturity from heads emerged to dough, varied from 7 to 43%. 3. The content of cmde protein decreased during the stages of growth until milk(P<.OS), and then changed very little with advancing maturity. 4. The content of NDF and ADF increased rapidly during the early growth period until heading(P<.05) and then decreased due to the increase in carbohydrate storage in the grain. 5. The dry matter yields per ha increased with advancing maturity, it was 2,420, 4,380, 7,190, 13,130 and 14,530kg at before flag leaf emerged, flag leaf emerged, heads emerged, milk and early dough, respectively. Significant difference has been obtained among stages of growth(P< .05). 6. According to the results obtained from this study, it is suggested that milk stage of maturity is higher in dry matter yields would be recomendable for spring oat for silage.
Comparison of Sorghum-Sudangrass Hybrids for Feeding Value and Forage Production in Chonnam Rerion
Journal of The Korean Society of Grassland and Forage Science, volume 15, issue 1, 1995, Pages 67~72
To select the highest yield soiling type forage, the yield performance of selected sorghum-sudangrass hybrids imported in 1992 have been evaluated at Chonnam region. The soiling type hybrids used in this experiment were TE-haygrazer, FP-5 Sudan, Sweet sioux V, and X -78050. Three different cuttings were done on July 6, August 6 and September 16 in 1992. This trial was arranged as a randomized complete block design with three replications under taken over a period 5 months from May to September in 1992. The results of this experiment were summarized as follows: The hybrids tested were not significantly different by plant height, leaf blade length, leaf blade width and stem diameter. In the first cutting, dry matter yield of FP-5 Sudan was the highest. In the second and third cutting, dry matter yield of Sweet sioux V was the highest among hybrids. The contents of crude protein, hemicellulose, relative feeding value(RFV), and amino acid were the highest by the first cutting, but NDF and ADF were shown the lowest.
Study on Baled Silage Making of Selected Forage Crop and Pesture Grasses I. Discussion on baled silage making as affected by phtsiological characteristics of tth plants
Journal of The Korean Society of Grassland and Forage Science, volume 15, issue 1, 1995, Pages 73~79
A simple conservation technique baled silage making of selected froage materials was discussed in Suwon and in Muan county during 1991 - 1992. Eleven species of forage crops and pasture grasses(maize. sorghum, pearl millet, barnyardgrass, rye, barley, spring oat, Italian ryegrass, orchardgrass, alfalfa and grass-legume pasture mixtures) were harvested at different growth stage from young plant to maturity and baled in a self constructed square baling chamber, and wrapped in a 0.05mm thick polyethylene plastic film. Each bales measured by 90cm long, 60cm wide and 50cm height and weighted between 15~20kg in dry matter basis. physio-molphologcal characteristics of the plants, leaf weight ratio(LWR), leaf area ratio(LAR), stalk ratio (SR), stalk hardness(SH) and other growth parameters, were analysed and were used as a parameter to evaluate the suitability of materials for baling. Italian ryegrass including orchardgrass, alfalfa and pasture mixtures produced high quality baled silage. Silage quality point(F1ieg-point) of Italian ryegrass was improved from 63 point in crushed custom silage to 75 piont in baled silage. Meterial of grass-legume pasture mixtures showed 55 point in crushed silage and 67 point in baled silage. Fodder rye, barley, spring oat and barnyardgrass were also evaluated as a good materials for baled silage making. On the other hand, meize including sorghum and peral millet were evaluated as a not suitable materals for baling due to its high value of SR and SH. Quality of maize was excellent with 88 point in clushed silage and medium with 47 point in baled silage making.