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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 6, Issue 3 - Sep 1986
Volume 6, Issue 2 - May 1986
Volume 6, Issue 1 - Jan 1986
Selecting the target year
Effect of Herbricide Treatments on Botanical Composition and Dry Matter Yields in Ladino Clover Dominated Pasture Mixtures
Journal of The Korean Society of Grassland and Forage Science, volume 6, issue 2, 1986, Pages 71~77
The field experiment was conducted to evaluate the effect of herbicide treatment (Banvel: 100, 200, U-46: 150, 300, Hedonal: 150, 300, Simazin: 100, 200g/10 a) on change in the botanical composition and dry matter productivity of ladino clover (Trifolium repens L.) dominated pasture mixtures. The experiment was laid down as a randomized block design with 4 replications at experimental field of Livestock Experiment Station in Suweon from 1983 to 1985. The results obtained are summarized as follows: 1. Against ladino clover in mixie grass-clover swards Banvel, U-46 and Hedonal gave good control. The percentage of ladino clover under herbicide tratment decreased to about 1-2%(Banvel), 11-18%(U-46) and 22-31%(Hedonal), respectively, while it increased to 71% in untreated pastures. However, in the second year this trend stated to reverse and occurred clover dominance again in U-46 and Hedonal application, while those remained approximately constant until end of the years under Banvel treatment. Simazin is to be not recommended. 2. The best time for herbicide treatment was found to be late summer before autumn sown 20-25 days. When it applied in early summer weed infestigation by Digitaria spp., Echinochloa spp. and other species was a severe problem. 3. Emergence and early development of introduced pastures were less satisfactory, if it oversown immediatley after herbicide treatments due to its phytotoxical damage. Residual chemicals remained about 7-10 days in topsoils. Perennial ryegrass and orchardgrass were slightly less tolerant than the other species. 4. In dry matter, taken as average of three year results, Banvel applied pastures produced the remarkably high yield of 1023 kg/10 a, which is as much as 44% higher than that of untreated plot. Dry matter yields under U-46 and Hedonal treatment were 842 and 811 kg/10 a, respectively. 5. Weender components and net energy concentration were affected by change in the botanical composition. Crude protein and NEL value were slightly higher in clover dominance than those in herbicide treatments. Total yields of net energy lactation, however, were the highest in Banvel application with 5401 MJ and the lowest in untreatment with 3889 MJ-NEL/10 a DM.
Studies on the Productivity of Native Reed ( Phragmites communis Trinius ) III. Effect of cutting time on the regrowth and Feed composition of native reed
Journal of The Korean Society of Grassland and Forage Science, volume 6, issue 2, 1986, Pages 78~83
This experiment was carried out in order to study the effect of cutting time on the regrowth and the feed composition in native reed. The first growth crops cut in June, July and October and the ratoon crops after cutting cut in October. The samples measured the plant height, leaf blade & sheath-stem ratio, grass yield, feed composition and invitro dry matter digestibility. The results are summarized as follow: 1. As the result of the grass productivity and nutrient yield, it was indicated that suitable cutting time of the native reed was from middle of June to middle of July. The yield of dry matter and in vitro digestible dry matter were much more in the first crops than in the ratoon crops in both of non-fertilizer and fertilizer(P < 0.01), and more in the fertilizer than in non-fertilizer in both of the first and ratoon crops(P < 0.01). 2. The contents of feed composition in native reed of non-fertilizer and fertilizer showed different trends between the first and ratoon crops. In case of the first crops, the contents of C. protein and C.fat were higher in fertilizer than in non-fertilizer and the contents of C. fiber, NDF and ADF were lower in fertilizer than in non-fertilizer, but these contents were not significantly different between non-fertilizer and fertilizer. In the ratoon crops, these contents between non-fertilizer and fertilizer were shown in a opposite manner to those in the first crops.
Effects of cutting Frequency and the Last cutting Date on Regrowth and Production in Timothy-dominated Sward
Journal of The Korean Society of Grassland and Forage Science, volume 6, issue 2, 1986, Pages 84~90
This experiment was carried out to evaluate the effect of cutting frequency and the last cutting date on the dry matter yield, the initial characteristics of spring growth, the yield of the first crops after winter, crude protein and crude fiber yield and the correlation efficients among the above items in timothy-dominated award. Cutting frequency was scheduled by 2, 3 and 4 times a year as main plot and the last cutting date in autumm were sept. 30, Oct. 10 and Oct. 20 as subplot. Experiment was arranged as a split-plot design with three replications and was performed for 4 years from 1980 to 1983 at the alpine area. The results obtained are summarized as follows: 1. The start of spring growth was somehow early as cutting frequency increased but not significant, and was not influenced by the last cutting data. 2. The dry matter yield was decreased by cutting frequency, but was not affected by the last cutting data. 3. The dry matter yield of the first crops after winter significantly decreased by cutting frequency, but failed to show and significant differences by the last cutting date. 4. Crude protein yield was increased by cutting frequency, while dry matter percentage was decreased. Crude fiber yield did not show the same trends. 5. There was a significant positive correlation between DM yield and DM percentage and yield of the first crops after winter, and between DM percentage and yield of the first crops after winter. However, there was a significant negative correlation between crude protein yield and DM percentage and yield of the first crops after winter. 6. It may be concluded from the above results that three times as cutting frequency and Sept. 30 as the last cutting data were desirable for the DM yield, but four times as cutting frequency and Sept. 30 as the last cutting data for the crude protein yield.
Vegetation Mapping and Fodder Value of Plant Communities at the natural Grassland
Journal of The Korean Society of Grassland and Forage Science, volume 6, issue 2, 1986, Pages 91~96
This trial was carried out to find out the degree of fodder value of different plant communities and to make the plant sociological vegetation map for all plant communities at the natural grassland of the Rehberg-Alm in the Bavarian Alps, southern part of Germany during 1982-1983. 1. Allogenic succession of the plant communities at natural grassland was much more influenced by the change of soil moisture or/and surface water than sheep grazing. 2. The plant communities at the Rehberg-Alm were Nardetum alpigenum, Poo-Prunelletum, Cirsium arvense Cirsium Vulgare-Association, Caricetum davallianae, Rumicetum alphini, Caricetum paniculatae and Disturbed lowland bog-Stand. 3. By the sheep grazing will be improved the inferior plant community of Nardetum alpigenum to the most desirable Poo-Prunelletum plant community at the mountainous grassland gradually. 4. General fodder value in this area depended heavily on the composition of vegetation of the plant communities. The highest fodder value was the Poo-Prunelletum with 4.4 and the next was the Nardetum alpigenum with 2.5. The others were not suitable for grazing pasture due to less fodder value.
A Study on the Change of Carex ferruginea Community by Fertilization and Grazing
Journal of The Korean Society of Grassland and Forage Science, volume 6, issue 2, 1986, Pages 97~102
This investigation was carried out to find out the succession of Carex ferruginea community by PK-fertilization and sheep grazing. The area covered with Caricetum ferrugineae and located at the Bavarian Alps in the southern part of Germany. 1. By the experimental conditions was changed the plant community of Caricetum ferrugineae, however, the influence of PK-fertilization was much more effective than that of sheep grazing. 2. As the species of Carex ferruginea, Melica nutans, Brachypodium sylvaticum, Calamagrostis varia were weak the absorptive ability of nutritive subatance, they almost disappeared due to PK-fertilization. On the other hand, grasses and legumes (Festuca rubra, Agrostis tenuis, Poa trivialis, Trifolium repens) increased by PK-fertilization distinctly. 3. The life forms of plant community at the experimental area covered with Hemicrytophytes of 55% and Geophytes of 40%. But by the PK-fertilization with sheep grazing increased their life forms Hemicryptophytes by 19% and Geophytes decreased by 31%, but in case the sheep grazing without fertilization increased Geophytes by 11% and Hemicryptophytes decreased by 12%. 4. The plant community of Caricetum ferrugineae before the experiment was successived into Festuco-Cynosuretum by PK-fertilization with sheep grazing.
Studies on Dry Matter Yields , Chemical Composition and Net Energy Accumulation in Three Leading Temperate Grass Species I. Influence of meteorolgical factors on the dry matter productivity and net energy value under different cutting management
F. Muhlschlegel ; G. Voigtlander ;
Journal of The Korean Society of Grassland and Forage Science, volume 6, issue 2, 1986, Pages 103~110
The experiments were carried out to study the influence of meteorological factors and cutting management on dry matter accumulation and net energy value in orchardgrass (Dactlylis glomerata L.) cv. Potomac and Baraula, perennial ryegrass (Lolium perenne L.) cv. Reveille and Semperweide and meadow fescue (Festuca pratensis Huds.) cv. Cosmos 11 and N.F.G.. The field trials were designed as a split plot design with three cutting regimes of 6-7 cuts at grazing stage, 4-5 cuts at silage stage and 3 cuts at hat stage in Korea and West Germany from 1975 to 1979. The results obtained are summarized as follows: 1. Productivity of orchardgrass, perennial ryegrass and meadow fescue were mainly affected by cutting systems and meteorological factors, especially air temperature, rainfalls, solar radiation and their interactions. In West Germany, cutting frequency was to be found asan most important factor influenced to dry matter yield and net energy value. 2. Orchardgrass, taken as average of all experimental sites in Korea, produced high yield of 875 kg/10 a in dry matter, which was as much as 32% and 27% higher than those of perennial ryegrass and meadow fescue, respectively. The annual dry matter yields of orchardgrass from 1976 to 1977 were shown a little variation. Dry matter yields in Freising and Braunschweig in West Germany were increased in all grass species continuously. 3. Orchardgrass, perennial ryegrass and meadow fescue showed different response to cutting frequency. The highest dry matter yields were found under 3 cuts at hay stage for orchardgrass and 4-5 cuts at silage stage for perennial ryegrass and meadow fescue. In West Germany, dry matter yields, as average of all grass species under different cutting systems, were 1326 kg, 1175 kg and 1098 kg/10a for 3 cuts, 4-5 cuts and 6-7 cuts, respectively. 4. Chemical composition and net energy concentration of temperate grasses were influenced by cutting managements. The highest yields of digestible crude protein were obtained under 6-7 cuts at grazing stage both in Korea and West Germany. In net energy yields, 3 cutting system produced the highest yield with 694 (orchardgrass), 665 (perennial ryegrass) an 623 kStE/10 a (meadow fescue). However, frequent cutting at grazing and silage stage produced higher yields than 3 cuts at hay stage in Cheju, Suweon and Taekwalyong.
Studies on Dry Matter Yields , Chemical Composition and Net Energy Accumulation in Three Leading Temperate Grass Species II. Synthesis and accumulation pattern of nonstructural carbohydrate
Journal of The Korean Society of Grassland and Forage Science, volume 6, issue 2, 1986, Pages 111~118
Sysnthesis and accumulation pattern or nonstructural carbohydrates in orchardgrass (Dactylis glomerata L.) cv. Potomac and Baraula, perennial ryegrass (Lolium perenne L.) cv. Reveille and Semperweide and meadow fescue (Festuca pratensis Huds.) cv. Cosmos 11 and N.F.G. were studied under different meteorological environments and cutting managements. The field experiments were conducted as a split plot design with three cutting regimes of 6-7 cuts at grzing stage, 4-5 cuts at silage stage and 3 cuts at hay stage in Korea and West Germany from 1975 to 1979. The results obtained are summarized as follows: 1. Accumlation of nonstructural carbohydrates in temperate grasses was influenced by grass species and regional climatic environments. Total nonstructural carbohydrates (TNC) of orchardgrass, perennial ryegrass and meadow fescue in Korea, taken as average of all cutting regimes, were shown a value of 4.39%, 6.08% and 8.01%, respectively, while those under cool summer climatic condition in West Germany accumulated to 10.42% (orchardgrass), 18.02% (perennial ryegrass) and 12.73% (meadow fescue). 2. Nonstructural carbohydrates in orchardgrass were accumulated mainly as mono-and disaccharose, while those in perennial ryegrass resreved as fructosan. The contents of fructosan and mono-and disaccharose were 1.34% and 3.04% for orchardgrass, 3.25% and 2.83% for perenninal ryegrass, respectively. Meadow fescue had a concentration of 3.93% fructosan and 4.08% mono-and disaccharose. 3. Synthesis and accumulation of nonstructural carbohydrates in temperate grasses were negative associated with increasing of air temperature (P
0.1%). Under hot stress during summer season in Korea, the contents of fructosan, mono-and disaccharose were decreased to about 0.34% nd 1.28% from a value of 1.34% and 2.69% in spring season. In Freising and Braunschweig, the concentration of reserved carbohydrates was less influenced by growing season. 4. Synthesis and accumulation pattern of nonstructural carbohydrates were shown a great respons to cutting frequency of the plants. Frequent cutting system under high temperature lowered the accumulation of reserved carbohydrates, especially fructosan and also caused to decrease the plant regrowth. However, under cool temperature, it shows a less differences of tructosan, mono-and disaccharose in the plants at all cutting systems.
Studies on Hill Pasture Improvement by Hoof Cultivation I. Effect of sowing time on establishment, survival and dry matter yield of pasture species
Journal of The Korean Society of Grassland and Forage Science, volume 6, issue 2, 1986, Pages 119~123
In order to find out the effect of sowing time on establishment, survival and yield of pasture species when hoof and tooth cultivation was applied, this experiment was conducted from 1982 to 1984 at the comfound of Alpine Experiment Station. The results obtained are as follows: 1. Grasses establishment of 15 April, 15 May, 1 August and 30 August plots was 11.1%, 9.8%, 12.4% and 3.1%, resulting in 10% establishment in all plots except 30 August. The establishment of legumes in spring sowing was about 30%, showing significant difference (P < 0.05) than that of autumn sowing. 2. Botanical composition of sown pasture in all plots 2 years after sowing ranged from 66% to 80%. There was no significant difference between treatment in terms of DM Production 3 years after sowing although there was the difference in establishment and survival of sown pasture at the beginning of grassland establishment. It indicates that appropriate fertilization and grazing management after sowing play an important role in grassland improvement when hoof and tooth cultivation is applied. 3. The utilization of forages in plot 2 years after seeding was from 45 to 53%.
Effect of the Split Application Method of Fertilizer Nitrogen and Potassium on the Yield and Botanical Composition in the Spring sowing Pasture
Journal of The Korean Society of Grassland and Forage Science, volume 6, issue 2, 1986, Pages 124~130
To find out the optimum split application ratios of fertilizer nitrogen and potassium in the newly opened pasture at spring, a field experiment was conducted. Two levels of nitrogen and potassium application and three split application ratios of both fertilizer were treated by split design with 4 replications. The experiment was carried out from March, 1984 to October, 1985 on the experimental field of the Livestock Experiment Station in Suweon. The results obtained are summarized as follow: 1. Total DM yield was not showed signigicant difference among split application ratios of nitrogen and potassium. 2. DM yield of grasses was 4,854 kg/ha in heavy basal application of N and
O (160 kgN: 140 kg
O/ha), it was significantly increased by 16% than of conventional dressing (80 kg N: 70 kg
O/ha). But there was almost no difference in dry matter among N and
O split application ratios. 3. Dry matter yield of legume in heavy basal dressing was decreased by 23% than that of conventional dressing. In the methods of NK application, dry matter yield of legume was tended to decrease by 3% with equal application and 9% with heavy dressing in autumn, when compared with that of heavy dressing in spring. 4. There was no significant difference in dry matter yield of native species between different basic fertilization levels, but dry matter yield of native species was decreased by 6% with equal application and more increased by 11% with heavy dressing in autumn, when compared with the yield of heavy dressing in spring. 5. In aspect of the botanical composition, the percentage distribution of grasses was increased and the ratio of legume was greatly decreased by heavy dressing at basal fertilization. Also for good maintenance of botanical composition, it is suggested that the equal split application of N and
O was desirable.