• Proceedings of the Korean Society of Crop Science Conference
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• 2022.10a
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• pp.92-92
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• 2022

In preparation for the ever-changing climate and unification of North Korea and South Korea, it is necessary to increase the grain self-sufficiency rate by selecting crops with good utilization in high-altitude regions. The principle is to sow pastures at the end of August. However, sowing occurs in spring because the sowing period is missed when the weather is bad or when the workforce is insufficient. Sometimes when the grassland is completely devastated, it is frequently sowed in spring. In addition, North Korea consists of a high-altitude regions, and has been devastated in a general mountainous region. As a result, the landscape is not good and it is vulnerable to natural disasters such as landslides. Therefore, to prevent this, pasture must be sowed in the high-altitude regions. The goal of this study was to evaluate and compare yield and feed value of pasture species and varieties by spring sowing in high-latitude regions. The study was conducted in Pyeongchang, Gangwon-do, which is 700m height above sea level. The pasture species and varieties was sown on April 24, 2022. Each treatment was carried out by sowing 30 kg/ha, the experiment field size was 1 m²(1m×1m), and randomized block design with tri-repeat. The total of 14 varieties was used in the study, 6 varieties of Orchardgrass (OG), 6 varieties of Tall fescue (TF) and 2 varieties of Perennial ryegrass (PRG). The grassland composition fertilization using (N:P₂O₅:K₂O at 80:200:70 kg/ha) was conducted and management fertilizer was N:P₂O₅:K₂O at 210:150:180 kg/ha. The first harvest was June 26,2022 and the second harvest was on August 16, 2022. For statistical analysis of the data, an Analysis of Variance (ANOVA) was performed using the R3.6.3 software program, and all data was subjected to analysis using Duncan's multiple range test. Significance was set at the 5% level. The dry matter yield at the first harvest was the highest in PRG, and second harvest was the highest in TF (p < 0.05). Overall, PRG showed a trend of gradually decreasing growth, OG and TF showed a trend of gradually improving growth. This showed that PRG was considerably weaker to summer depression than other pasture species. Comparing the total dry matter yield, TF was the highest (4,565.45 kg/ha), but there was no significance difference with PRG (4,487.24 kg/ha) (p < 0.05). In addition, comparing the total TDN (total digestible nutrient) yield, TF was the highest (3147.33 kg/ha), second in PRG (2975.67 kg/ha) and third in OG (2052.33 kg/ha). Since this result is the data of the second harvests, if the result is derived by the end of next year, it will be provided as basic data for selection of pasture species and varieties suitable for spring seeding in high-altitude regions.

• Journal of The Korean Society of Grassland and Forage Science
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• v.16 no.1
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• pp.87-92
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• 1996

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.

• Proceedings of the Korean Society of Crop Science Conference
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• 1986.06a
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• pp.112-113
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• 1986

• Proceedings of the Korean Society of Crop Science Conference
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• 2022.10a
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• pp.291-291
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• 2022

• Journal of the Korean Society of Tobacco Science
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• v.19 no.1
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• pp.24-28
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• 1997

The field experiment for field desalinization by precultivation of orchard crops were carried out to evaluate relationship between the varieation of chlorine contents of soil and crop uptake in the upland diverted from paddy field. After harvest of grass crops, soil samples were taken for analysis of chlorine contents of soil layers. Regardless of kinds of grass crops cutivated, contents of soil chlorine were decreased comparing to non-crop plot. Chlorine content in plant harvested at just before the flowering stage was much higher than that of after flowering. Chlorine uptake and dry matter were increased in order of Italian ryegrass, Perennial ryegrass, and Sudan grass. Positive correlations were showed between chlorine uptake and dry matter. The content of soil chlorine decreased by higher yield of dry matter.

• Journal of The Korean Society of Grassland and Forage Science
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• v.11 no.3
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• pp.169-174
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• 1991

For simple estimation of pasture production and nutritive value in relation to height of orchardgrass (Ductylis glomumtu L.), the experiment was carried out in a pasture mixture dominated by orchardgrass. The samples of grasses were harvested at the heights of about 30, 40, 50, 70 and 90 cm at the first harvest under different percentage of 100 (grass coverage): 0 (bareland), 80 : 20, 60 : 40, 40 : 60 and 20 : 80, respectively. As the height of orchardgrass was increased, fresh and dry matter (DM) yield were significantly increased. The regression equation between DM yield (Y) and height (X) was Y=ll. 5390 X- 146.60 (r=O. 9414 * * ). Also the higher bareland, the lower pasture production was observed. As the plant height at the first harvest was increased, the contents of crude (C) protein, C. fat, C. ash and relative feed value were markedly decreased. On the other hand, the contents of C. fiber, NFE, NDF. ADF, cellulose and lignin were significantly increased, respectively. The higher height, the lower DM digestibility was found. The equation between digestibility (Y) and height (X) was Y=- 0.2193 X+ 80.99 (r = - 0.9862**). Considering DM yield, digestibility and crude protein, the optimum height of orchardgrass at the first harvest was 59 to 67crn for better pasture production and nutritive value.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.24 no.4
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• pp.53-61
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• 1979

Mixed seeds of Dactylis glomerata, Festuca arundinacea, Trifolium repens, Lolium multiflorum on the improved pasture were sown to investigate the vegetational change during the years of 1971-1978. The dominant species were Dactylis glomerata and Trifolium repens from the first year to the third year, Imperata cylindrica and Trifolium repens in the forth year, Imperata cylindria and Zoysia japonica from the fifth year to the eighth year in the pasture.

• Journal of The Korean Society of Grassland and Forage Science
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• v.18 no.4
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• pp.329-336
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• 1998

This study was conducted to find out the changes of the botanical composition, ecological behaviour and forage value of vegetation in abandoned hilly pasture, in Yeoju, Kyonggi Province from April, 1993 to October, 1996. This experiment was arranged as a vegetation survey(Pflanzenaufnahme) with two different pastures ((1) with forkcrane planed pasture and (2) forest pasture). After the abandoned management of pasture, wild grasses and shrubs of the botanical composition were gradually increased and pasture plants tended to decrease rapidly in the two different hilly pasture. In abandoned management of planed and forest pasture, moisture figure, reaction figure and nitrogen figure of the ecological behaviour were greatly decreased and also the forage value of standing crop was greatly decreased in three years (from 7.06 to 4.60 in planed pasture and from 6.81 to 4.38 in forest pasture). After abandon of two different hilly pastures, fresh weight of standing crops in flowering stage was greatly decreased 48.5~54.1% in three years than that of the vegetation at the pasture management.

• Journal of The Korean Society of Grassland and Forage Science
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• v.17 no.4
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• pp.351-356
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• 1997

With a purpose of finding out the influences of herbicide treatment on the forage value and ecological characteristics of grassland vegetations in the Rumex acetosella dominated pasture, this trial was arranged as a randomized block design with three treatments[1) Seeding(cntrol), 2)dicamba 4${\ell}$/ha+seeding+dicamba 4 ${\ell}$/ha and 3) dicamba 4${\ell}$/ha+lime+seeding+dicamba 4 ${\ell}$/ha], and conducted in Youngam, Jeonnam Province ftom June, 1995 to October, 1996. In the Rumex acetosella dominated pasture, the treatment of dicamba 4${\ell}$/ha+ lime+seeding+dicamba 4${\ell}$/ha was improved to the most desirable grassland vegetation with pasture plants of 87%. In the renovated grassland, the life forms of Hemicryptophytes increased greatly by 57.0%, on the other hand Geophytes was much more decreased by 56.8% than those of low productive grassland. The similarity coefficients between grassland vegetation groups were greatly affected by botanical composition. The forage value of standing crop in the renovated grassland with 6.56 was much more increased than low productive grassland with 2.76. The treatment of dicamba 4${\ell}$/ha+lime+ seedingdicamba 4${\ell}$/ha increased 2 1% of dry mattaer yield, and were high 18- 19% of energy (NEL and TDN) productivity than those of the control(seeding), respectively.

• Korean Journal of Soil Science and Fertilizer
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• v.44 no.6
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• pp.1314-1319
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• 2011

This study was carried out to investigate the surface soil organic carbon fractions affecting by different land use types, including needle-leaf forest (FN), broad-leaf forest (FB), pasture, annual upland cropping land (upland), and paddy rice land (paddy). We chose seven regions across Korean inland, considering sea level altitude, and measured soil organic carbon content and physico-chemical properties such as bulk density at a depth of 0~15 cm using core samples in April for the each land use type. In addition, labile organic carbon fractions in soil including light fraction and hot water extractable carbon were investigated. From this study, organic carbon storage (Mg C per ha) in the upper 15-cm soils was highest in FB (37.8), and decreased in the order of pasture (29.1), FN (28.8), paddy (21.9), and upland crop (19.9). In forest, more than 20% of soil organic carbon existed as light fraction, the free organic matter. Hot-water extractable carbon contents of soils in five land use types were lower than 7% of their soil organic carbon content.