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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
Editor in Chief :
Volume & Issues
Volume 16, Issue 4 - Dec 1996
Volume 16, Issue 3 - Sep 1996
Volume 16, Issue 2 - Jun 1996
Volume 16, Issue 1 - Mar 1996
Selecting the target year
( Partitioning of Carbon and Nitrogen Reserves During Winter Adaptation and Spring Regrowth IV. Effect of seeding date on the content of organic reserves on the wintering period and forage yeild in rape ( Brassica napus L. )
Journal of The Korean Society of Grassland and Forage Science, volume 16, issue 1, 1996, Pages 1~8
The objective of this study is to obtain the basic data for investigating the effects of organic reserves on winter survial or regrowth yield. Forage rape (Brussicu napus L.) was sown at 10 day> interval from Sep. I to Nov. 1. Field-grown palnts were sampled on the before wintering (Dec. 4) and on the wintering period (Jan. 16) to analyze the nitrogen and non-structural cahohydrate reserves. The rate of winter survival and regrowth yield were also measured in the spring of next year. On the before wintering, the dry matter yields from the plots sown on Sep. 1, Sep.11 and Sep. 21 were 860, 596 and 260 kg/lOa, respectively. No. harvest was canied out on the plots sown after Oct. 1 because the growth state was not enough to cut. Both of nitrogen and starch contents per plant significantly increased as the seeding date was later. On the wintering period, the contents of nitrogen reserves in roots were 176.8. 120.1, 71.7, 84.0, 72.1, 45.3 and 33.3 mg/plant, those of starch reserves were 199.0. 55.8, 21.8, 92.6, 86.5, 36.4 and 29.0 mglplant, resepctively, in the plots sown on Sep. 1, Sep. 11, Sep. 21, Oct. I, Oct. 11, Oct. 21 and Nov. 1. The rates of winter survival were 40, 36, 33, 85, 87, 59 and 49% and regrowth yields were 161, 86, 65, 520, 451, 121 and 33 kgD.M/lOa, respectively, in each plots. 'Ihese results clearly showed that seeding date has a close influence on the level of organic reserves and forage yield, and that the possibility of continuous utilization on the before and alter wintering is extremely limited by seeding date.
Studies on the Endophyte Status and Cutting Frequency of Tall Fescue (Festuca arundinacea Schreb. ) I. Agronomic charateristics , DM yield and weed development of tall fescue
Journal of The Korean Society of Grassland and Forage Science, volume 16, issue 1, 1996, Pages 9~16
'This experiment was canied out to investigate the effects of endophyte status(end0phyte-free and -infect) and cutting frequency(3, 4, 5 and 6 timeslyear) on the agronomic characteristics, DM yield and weed development of tall fescue(Festuca arundinacea Schreb.) at the Experimental Field of Grassland and Forage Crops Division, National Livestock Research Institute, Suweon, from 1993 to 1994. 'Ihe results obtained are summarized as follows: DM yield of endophyte-infected tall fescue was slightly higher than that of endophyte-free tall fescue. DM yield of two tall fescue varieties was significantly decreased with frequent culting(p<0.05). Weed development of pasture tended to be decreased with endophyte-infected tall fescue and infrequent cutting, and endophyte-infected tall fescue had a good adaptation to the poor environment. Based on the results of this experiment, it is suggested that a slight increase in forage yield could be obtained from endophyte-infected tall fescue and endophyte-infected tall fescue was more persistant than endophyte-free tall fescue under poor conditions.
Studies on the Endophyte Status and Cutting Frequency of Tall Fescue (Festuca arundinacea Schreb. ) II. Forage quality of tall fascue
Journal of The Korean Society of Grassland and Forage Science, volume 16, issue 1, 1996, Pages 17~26
This experiment was carried out to investigate the effects of endophyte staWendophyte-free and -infect) and cutting frequency(3, 4, 5 and 6 timeslyear) on the forage quality of tall fescue(Festuca crnrtzdit~crcerr Schreb.) at the Experimental Field of Grassland and Forage Crops Division. National Livestock Research Institute, Suweon, from 1993 to 1994. 'Ihe results obtained are summarized as follows: CP content of tall fexue was increased with endophyte-free and cutting frequency for two varieties. Crude protein yield(CPY) of tall fescue in 1993 was increased with endophyte-free and cutting frequency for two varieties(P<0.05). In 1994, however. CPY of endophyte-free tall fescue was slightly lower than that of endophyte-infected tall fescue and the higher CPY was observed when tall fescue was harvested 6 times per year. NDF content of tall fescue was not different between endophyte-infected and -free. NDF was decreased with cutting frequency for two varieties in 1993, however. it was not influenced by the endophyte and cutting frequency in 1994. ADF content of tall fescue was not different between endophyte-infected and -free. and it was decreased with cutting frequency for two varieties. IVDMD was not influenced by endophyte, however, it was increased with cutting frequency for two varieties. Based on the results of this experiment, it is suggested that a slight increase in forage quality could be obtained from endophyte-free tall fescue and the quality was increased with frequent cutting.
Study on the Utilization of Festulolium braunii for the Development of NewForage Resources
Journal of The Korean Society of Grassland and Forage Science, volume 16, issue 1, 1996, Pages 27~38
This study was conducted to evaluate the potential of Festulolium braunii(Festuca pratensis Huds.
Loliurn mulrijZorum Lam.)as forge sources. The experiment was arranged in a split plot design with four replications from Feb. 1995. to Jan. 1996 at Hohenheim university. Main plots consisted of three forage species, Festulolirtrn braunii(Paulita), Lolium multiJomm(Lemtla), and Secale cereale(Halo) and subplots consisted of three maturity, boot, heading, and anthesis. The growth characteristics, DM yields, nutritive value, N and energy balance were observed. The heading date of Festulolium braunii was about two days earlier than that of Loliunz mrtltiflorum, farthermore Fesrulolium braunii retained higher leaf weight ratio(LWR) than other species. Festulolium brarrnii failed to show any significant differences in grass length, number of tillers, LAI, CGR, and DM accumulation when harvested at the same stage of maturity as compare with Loliurn mulriiflorutn or Setale cerede, bur the content of CP, OMD, and mineral elements and NEL value of Festulolium braunii compare to othes were slightly increased(P<0.05), while the content of NDF, ADF, and lignin decreased(P<0.05). The yield of CP was greater for Festulolium braunii than for Lolium multfimm and yields of DOM and NEL per unit area(ha) for Festulolium braunii were greater than for other species(P<0.05). The equivalent or higher DM production and nutritive value are obtained when Festulolium braunii are cut during the period from boot to anthesis stages, therefor DM intake, preference, and N and energy balance were also higher for Festulolirtm braunii compare to for other species. It could be suggested that Lolium multrfirum would be a more suitable substitute to Festuloliron braunii without decreasing forage production and quality, but the substitutive effect of Secale cereale would be difficult because of the maor differences in growth type and period compare to Fesrulolium braunii. From above the results of this experiment it appears that Festulolium braunii have a potential to provide forage sources. but funher research is needed to ascertain their potential under the climate of Korea.
Groeth Charateristics & Matter Yield Ability According to Seed Production Time of Italian Ryegrass
Journal of The Korean Society of Grassland and Forage Science, volume 16, issue 1, 1996, Pages 39~46
The experiment was conducted to inxvestigate matter production ability and growth characteristic variation for Italian ryegrass seed of introduced variety and the different seed production time of the next generation in paddy field at Iksan and Kyehwa experiment field from 1987 to 1988. Germination rate is good at seed production of 35 days before and after heading with introducced variety. Also, Early growth before wintering, dead leaf rate and regenerating day is same tendendy. Panicle numbers per hill like that and heading date is for 15~20 days after heading seed is late about three days, but 35 days before and after heading seed is early about one day. Fresh and drymatter yield at the different cutting time shows decrease in 15~25 days after heading seed but 35 days before and after heading seed is same or increase trend, it's notable at Kyehwa paddy field in reclaimed land. In case of feed value according to cutting time differ little against introduced seed.
Studies on the N ,
-Application in the Mixed Sward of Alfalfa-Grass II. Effect of Phosphate fertilization levels on dry matter and nutrition yeild of forage in the mixed sward alfalfa-grasses
Journal of The Korean Society of Grassland and Forage Science, volume 16, issue 1, 1996, Pages 47~52
To investigate the effects of phosphate(
) fertilization levels on the dry matter(DM) yield, nutrition yield, and
efficiency of forages in mixed sward of alfalfa-grasses, a field experiment arranged by randomized complete block design with five treatments(0, 50, 100, 150 and 200kg
/ha) was conducted at Livestock Experiment Station in Suwon, September, 1990 to Feb~ary, 1993. During two years, average DM yields of forages increased as
fertilization level was increased, but no significant difference was found between DM 10,754kg of
150kg/ha and DM 10,845kg of
200kg/ha. Cmde protein and energy productivity of forages increased as
fertilization level was increased, and the increasing degree was highest between
l00kg and 150kg/ha feriilization. With increasing
fertilization, mineral contents tended to increase in P, K and WCa+ Mg equivalent ratio, but not to be regular in the other elements. Efficiency of
was highest at
150kg/ha fertilization, which produced DM 12.8kg. net energy lactation 75.4MJ. starch equivalent 6.lkStE, and total digestible nutrients 8.6kg per Ikg
Effect of Grazing Stage and Intensity on the Forage Production and Nutritive Value in Orchargrass Dominant Pasture
Journal of The Korean Society of Grassland and Forage Science, volume 16, issue 1, 1996, Pages 53~60
A field experiment was carried out to determine the effects of grazing stage and intensity on the forage production and nutritive value in orchardgrass dominant pasture, 1989 and 1990. The grazing stages were 20- 25m, 30-35cm and 40-45cm of plant height, and high and medium grazing intensity were set by the number of growing cows (initial body weight: 230-250kg), which was adJusted according to the pasture production. The high level of grazing intensity was 150% of medium intensity. Annual grazing frequency was 10 times in 20-25cm. 8 times in 30-35cm. and 6 times in 40-45cm of plant height. Dry matter(DM) yield was increased with increasing of plant height at grazing : 7,090kg in 20-25cm 7,882kg in 30-35n and 8,260 kgha in 40-45cm of height. Higher DM was observed at medium grazing intensity. In spring, daily DM production was more vigorous than those in summer and autumn season. Cmde protein (CP), digestible DM, and DM intake were decreased with increasing of plant height at grazing. CP content was 25.8% in 20-25cm 22.4% in 30-35m and 19.2% in 40-45cm, while the contents of neutral detergent fiber and acid detergent fiber were increased with higher plant height. Relative feed value was 11 1.2 in 20-25cm, 104.4 in 30-35n and 99.6 in 40-45cm. Also nutritive value of pre-grazing pasture plants was remarkably higher than that of post-grazing, and not significant differences of nutritive value were found between grazing intensity. From the above mults, it may be concluded that optimum plant height for grazing was 20-25cm and 30- 35cm in pasture mixtures dominated by orchardgms, and medium grazing intensity was very desirable for pasture productivity.
A Study on Feeding ,Reproduction , Meat and Milk Productions , Disease and Genetic Character for Cheju Horse Industry Development I.Monthly changes of herbage production comparing new pastures of horse farm with old pastures
Journal of The Korean Society of Grassland and Forage Science, volume 16, issue 1, 1996, Pages 61~68
Hehage production, botanical composition and soil chemical characteristics were investigated Ween new pastures and old pastures during grazing seasons from May 1993 to October 1994, to find out the condition of pastures grazed by horses on Chdu. Dry matter yields between new pastures and old pastures were 8,757kglha and 7,486kglha respectively. Plant heights of new pastures were 17.4cm. compared with those of old pastures of 12.lcm. The botanical composition of new pastures was composed of grasses about 402, legumes 7~14%, others 18-30% and dead materials 18~ 25%. whiie there were grasses 12%, legumes 3~7%, others 65% and dead materials 15% in old pastures. The contents of crude protein, phosphoms and sodium were lower in old pastures(l3.30, 0.24 and 0.10% respectively) than those in new pastures(l5.47, 0.28 and 0.14% respectively). There was no difference in ADF, NDF, Ca, Mg and K content between the 2 kinds of pastures. The chemical characteristics of the 2 kinds of pastures was shown to be similar, except available phosphorus, comparing 8.18ppm in old pastures with 84.43ppm in new pastures. Although the herbage yield and the soil characteristics of old pastures were lower than those of new pastures, we suppose that the old pastures would be improved, if taken good care of by methods such as oversowing and sometimes applying fertilizer.
Effect of the Sowing Time on the Dry Matter Yield, Nutrient Composition and Nutritive Yield of Forage Rape in Hongchon Area
Journal of The Korean Society of Grassland and Forage Science, volume 16, issue 1, 1996, Pages 69~74
This experiment was carried out to investigate to adaptability of forage rape(Brassica napus oleifera) and the determine its proper sowing time for a second cropping on the fallow field after sweet corn yield in the Hongchon area The forage rape, Ramon was sown at intervals of about ten days given eight different sowing times as treatments the early August to the middle October 1988. Plant height and DM yield were significantly higher for the early August(P<0.05) than for the other sowing times. Crude protein contents of the early August, mid August, mid September and late September were higher(P<0.05) 26.5, 24.3, 27.1 and 30.9% as much as that of the late August(l4.9%), respectively. Sowing time having high content of crude fiber shown low content of crude protein. Yields of crude protein were 3.52, 2.36, IAltha in the early, mid and late August, respectively. The highest crude protein yield was shown in the early August(P<0.05). Crude fiber yield was higher in early, mid and late August than in the other sowing times. These results indicate that forage rape sown in the early August as a second cmpping on the fallow field after sweet corn yield in Hongchon area, could be used as the high quality forage.
Effect of Different Harvest Dates on Dry Matter Yield and Forage Quality of Corn ( Zea mays L. )
Journal of The Korean Society of Grassland and Forage Science, volume 16, issue 1, 1996, Pages 75~80
The corn is one of the most important forage crop in Korea. The harvest time for silage affects dry matter (DM) yield and silage quality. This study was carried out to determine the effect of harvest time on the DM yield and nutritive value of corn forage at the Experimental Livestock Farm, College of Agriculture and Life Sciences, Seoul National University, Suweon in 1991. Forage DM yield and DM content of corn forage significantly increased mainly due to increase of ear. And also the ear to total DM ratio increased from 30% to 55% as the harvest was delayed. Chemical composition of the corn forage was improved by reduction in crude fihr, neutral detergent fiber and acid detergent fiber as the harvest was delayed. This results indicated that the harvest time of corn forage plays an important role to determine DM yield and DM contents for silage materials.
Effects of Cattle Manure Application on the Soil Properties , Yield Performance and Quality of Silage Corn Cultivated on Paddy land
Journal of The Korean Society of Grassland and Forage Science, volume 16, issue 1, 1996, Pages 81~86
Silage wm(cv, Gwanganok) was cultivated during 1991-1994 on paddy land as a rotational cropping system of rice, to evaluate the effect of cattle manure application on the soil characteristics, yield performance and quality of com plant. The treatments used in this study were non-fertilizer, NPK standard in chemical fertilizer(N:
= 200 : 150 : 150 kg/ha), cattle manure 20.40, 60 and 80 ton/ha Application of cattle manure improved soil pH, organic matter, available phosphate and exchangeable cations in the soils. During the experiment, soil pH was improved from 4.7 in the chemical fertilizer application(control) to 5.4-5.6 in the application of cattle manure, and available
wntent was increased from 72.2 ppm(contro1) to 340.2 ppm(cattle manure 80 ton/ha). Application of cattle manure increased plant growth, plant height and stalk diameter, and silage yields. Dry matter yields were produced 15.88 ton(chemical fertilizer), 20.11 ton(cattle manure 40 ton) and 21.22 ton/ha(cattle manure 80 ton/ha). However, no signicant yield differences were observed between cattle manure 40, 60 and 80 tonlha Productions of total digestible nutrients(TDN) and net energy for lactation(NEL) were also increased under cattle manure application. From the abobe results, the proper application amount of cattle manure was 40 tonha in this experiment.
Study on Baled Silage Making of Selected Forage Crop and Pesture Grasses III. Evaluation of chemical components and energy contents of baled silage with selected forage
Journal of The Korean Society of Grassland and Forage Science, volume 16, issue 1, 1996, Pages 87~92
The quality of silages, made from whole crop barley, rye, spring oat, Italian ryeglass, orchardgrass, alfalfa and grass-legume pasture mixtures, were evaluated under two different conservation techniques in baled silage making (BS) and conventional silages(CS). Crops materials were harvested at the stage of the greatest dry matter accumulation(hard dough for barley, soft dough for rye and oat, late bloom for Italian ryegrass and others pasture species), and baled in a self constructed square baling chamber weighted by 25~30kg in dry matter basis. Each bales were wrapped with 0.05mm thick polyethylen plastic film and stored six months long in stack silos. Barley, rye, oat and Italian ryegrass including of pasture crops produced higher quality silages in the baled silage making, due to better organic acid fermentation and lower nutrient losses during the period of storage than those in the conventional silages. TDN contents of barley silages were 65.3% in BS and 63.7% in CS, NEL value of barley silages was improved hum 6.48MJ(CS) to 6.61MJ/kg(BS) in dry matter basis. Silage quality of rye, oat and pasture crops were also improved markedly in the baled silage utilization.