• Proceedings of the Korean Society of Grassland Science Conference
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• 2005.06a
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• pp.59-68
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• 2005

• Proceedings of the Korean Society of Grassland Science Conference
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• 2005.06a
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• pp.69-73
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• 2005

• Proceedings of the Korean Society of Grassland Science Conference
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• 2005.06a
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• pp.97-108
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• 2005

• Journal of The Korean Society of Grassland and Forage Science
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• v.1 no.2
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• pp.7-14
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• 1979

• Journal of The Korean Society of Grassland and Forage Science
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• v.42 no.1
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• pp.32-40
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• 2022

In this study, the appropriate unit cost in grassland establishment was redeveloped by the grassland establishment method and work criteria. The grassland establishment method was divided into tillage establishment (all logging) and no-tillage establishment (all logging and partial logging). The price for the work criteria by the establishment method was presented for each permission/authorization and establishment work. In permission/authorization for grassland establishment, the cost of each work criteria was of environmental impact (small scale environmental impact) assessment, disaster impact assessment, cadastral serving fee, forest survey, and connection fee for control of mountainous districts. In establishment was of logging, cleaning/gruffing, plowing/soil preparation, seeding, fertilization, livestock manure compost, seed, herbicide, labor cost (fertilizer, seed and herbicide), soil consolidation, cattle trail, and fence. The unit cost of grassland establishment was KRW 115,894,212 for the tillage establishment, and KRW 110,281,572 and KRW 106,680,122 for the all and partial logging of the no-tillage establishment, respectively. The current study redeveloped the establishment method, work criteria, and estimation of the unit cost of grassland establishment. It can be usefully used to carry out government projects to support related to establishment and maintenance of grassland.

• Journal of The Korean Society of Grassland and Forage Science
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• v.17 no.2
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• pp.93-100
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• 1997

It is generally analyzed that the subject area of grassland development seen in the North Korea area following unification with the South Korea includes hillland, h o w upland, tideland, and other expected grassland development areas. Possibilities and prospects for grassland development become higher if such grassland is developed by methods of environmental affinity suitable to the geographical and environmental conditions of North korea. First, the grassland development has to be based on grass species which are both cold resistant and suitable to the climate and the soil conditions of North korea. In addition, research on adaptable species, mixture combination selections and grassland establishment methods should be performed along with the accumulation of domestic data. The kind of research can be conducted in such areas as Yenben in China(Yenben University), Taekwanryung and Taeback mountains, where geographical features are similar to those of North korea. This research is possible because research can easily be given access to these locations. Hence, it is desirable to prepare for the unification of the Korean peninsula by caning out basic and applied research, and by way of accumulating data in the relevant fields.

• Journal of The Korean Society of Grassland and Forage Science
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• v.37 no.3
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• pp.237-241
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• 2017

Drought is one of the detrimental factors that impair plant growth and productivity. In this study, we applied annealing control primer (ACP)-based reverse transcriptase PCR (polymerase chain reaction) technique to identify differentially expressed genes (DEGs) in maize leaves in response to drought stress. Two-week-old maize seedlings were exposed to drought (DT) by suspending water supply. DEGs were screened after 3 days of DT-treated samples using the ACP-based technique. Several DEGs encoding 16.9 protein, antimicrobial protein, hypothetical protein NCLIV_068840, thioredoxin M-type were identified in maize leaves under drought stress. These genes have putative functions in plant defense response, growth and development. These identified genes would be useful for predictive markers of plant defense, and growth responses under drought stress in plants.

• Journal of The Korean Society of Grassland and Forage Science
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• v.41 no.4
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• pp.302-307
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• 2021

In the current study, lactic lactic acid bacteria (LAB) Lactobacillus plantarum and Pediococcus pentosaceus were used as a mixed additive for the production of Orchardgrass silage by ensiled method and nutritional change fermentation ability and microbial content of experimental silages. The addition of LAB to Orchardgrass during ensiling process rapidly reduced the pH of the silages than the non-inoculated silages. In addition, the lactic and acetic acid content of silage was increased by LAB strains than the non-inoculated silages whereas butyric acid content was reduced in silage treated with LAB. A microbiological study revealed that higher LAB but lower yeast counts were observed in inoculated silages compared to non-inoculated silage. Overall data suggested that the addition of LAB stains could have ability to induce the fermentation process and improve the silage quality via increasing lactic acid and decreasing undesirable microbes.

• Journal of The Korean Society of Grassland and Forage Science
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• v.5 no.1
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• pp.8-12
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• 1985

In the pure Phragmites communis grassland in the lower course of Nakdong river, the seasonal changes of standing crop and productive structure, annual changes of the maximum standing crop, and annual net production were estimated. The maximum standing crop of the pure P. communis grassland is on mid-September, the maximum average daily productivity was $32.7g/m^2/day$ from June to July. The leaf area index of the pure reed grassland increased to July, and then decreased slowly. The logitudinal growth of above-ground parts of the reed grassland was maximum state, 320cm, on mid September. Annual net production was $3,399g/m^2/year$, and it suggests that grassland is stable. Productive structure of the pure reed grassland indicated that the distribution of leaf was concentrated on the upper parts according to the grassland maturation.

• Journal of The Korean Society of Grassland and Forage Science
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• v.36 no.3
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• pp.237-242
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• 2016

Copper (Cu) is a necessary microelement for plants. However, high concentrations of Cu are toxic to plants that change the regulation of several stress-induced proteins. In this study, an annealing control primer (ACP) based approach was used to identify differentially expressed Cu-induced genes in alfalfa leaves. Two-week-old alfalfa plants (Medicago sativa L.) were exposed to Cu for 6 h. Total RNAs were isolated from treated and control leaves followed by ACP-based PCR technique. Using GeneFishing ACPs, we obtained several genes those expression levels were induced by Cu. Finally, we identified several genes including UDP-glucuronic acid decarboxylase, transmembrane protein, small heat shock protein, C-type cytochrome biogenesis protein, mitochondrial 2-oxoglutarate, and trans-2,3-enoyl-CoA reductase in alfalfa leaves. These identified genes have putative functions in cellular processes such as cell wall structural rearrangements, transduction, stress tolerance, heme transport, carbon and nitrogen assimilation, and lipid biosynthesis. Response of Cu-induced genes and their identification in alfalfa would be useful for molecular breeding to improve alfalfa with tolerance to heavy metals.