Cool-season grasses are currently widely used in South Korea, but their productivity and quality may decline due to global warming associated with climate change. Warm-season grasses have shown greater adaptability to heat stress and drought conditions, making them potential alternatives for summer pasture establishment in central and southern Korea. This study aimed to compare the growth characteristics, productivity, and forage value of warm-season grasses bermudagrass and crabgrass for pasture establishment in the central region of South Korea. The experiment was conducted from May 2023 to October 2024 at the National Institute of Animal Science, Cheonan, South Korea. Crabgrass exhibited superior initial establishment and faster growth rates, whereas bermudagrass had poor initial growth, placing it at a competitive disadvantage against weeds. However, after the first cutting, bermudagrass successfully established itself and maintained a stable botanical composition. The annual dry matter productivity of crabgrass (8,586 kg/ha in 2023 and 12,013 kg/ha in 2024) was 32.62% and 40.18% higher, respectively, than that of bermudagrass (5,785 kg/ha in 2023 and 8,570 kg/ha in 2024). In forage value, crabgrass tended to show higher feed value at the initial harvest, while bermudagrass showed higher quality at the later harvests. In conclusion, these results suggest that both crabgrass and bermudagrass have potential for pasture establishment, with carbgrass being more suitable for short-term due to its rapid growth and high productivity, and bermudagrass being more appropriate for long-term due to its stable productivity in regions where overwintering in possible.

This study aimed to compare terrestrial insect communities in forests and grasslands to explore habitat-specific differences. Grassland and undisturbed forest zones in Buk-sil-ri, Jeongseon-eup, Gangwon-do were surveyed in August and September of 2022 and 2023 using visual inspection and light traps. A total of 1,369 individuals from 447 species, 56 families, and 13 orders were recorded. Lepidoptera was the most dominant (44.0%, with 239 species and 602 individuals) order, followed by Hemiptera (17.6%, 81 species and 241 individuals) and Odonata (11.4%, 13 species and 156 individuals). While most orders, including Lepidoptera, Hemiptera, and Diptera, showed higher abundance and richness in forests than in grasslands, the diversity index was greater in grasslands. The presence of diverse vegetation including invasive species in grasslands likely influenced insect diversity and composition. These findings can enhance our understanding of insect community dynamics across forest and grassland habitats.

This study evaluated the feasibility of integrating the carbon storage of grasslands in Gangwon province into the InVEST carbon storage and sequestration model using large-scale digital land cover maps. Land cover maps from 1980, 1990, 2000, and 2010, obtained from the Environmental Geographic Information Service, were analyzed, with 28 maps examined for each year. Grassland carbon storage in Gangwon province was estimated through the InVEST software. The findings indicated that the grassland area showed an increase in 1990, followed by a declining trend, contrasting with the continuous reduction observed in actual managed grassland areas. Discrepancies between mapped and managed grassland areas were attributed to the classification criteria of the land cover maps, which included non-forage land uses such as golf courses, ski resorts, and green spaces, resulting in overestimations of grassland areas. To enhance accuracy, the adoption of land cover maps with refined grassland classification criteria is necessary. Accurate representation of grassland areas in land cover maps is critical for reliable estimation of grassland carbon storage using the InVEST software.

The current survey form of grassland has not played its role in managing the grassland effectively because of the ambiguous questionnaire items and the absence of method and time of the investigation. Therefore, this study was conducted to clarify and add the items for effective of grassland management. The survey form of grassland was regulated in Article 16 of the Enforcement Rules of the Grassland Act (Survey on Grasslands Management Status, etc.). The five contents that needed improvement were the grassland owner, the survey timing and method of established grassland, grassland used livestock, grassland usage condition, and grassland grade. In the improved survey form of grassland, the grassland owner was changed to the grassland manager. In addition, ‘Survey by each land’ was added to the improved survey form in which the managers can survey each land. The dimension of each grassland establishment method was deleted in the grassland establishment time and method. In the livestock using grassland, the number of livestock and the area where livestock are used were added, and the number of other livestock was added, too. The grassland grade was decided as the combined score by three evaluation categories; grassland usage, the ratio of forage production in grassland and kinds of forage. The high, middle, and low grades were over 8, 6~7, and under 5 points in the combined score, respectively. The results show that the changed survey form of grassland can make grassland management more efficient by materializing the subject of grassland management and the survey terminology and methods.

The grassland section of the greenhouse gas inventory has limitations due to a lack of review and verification of biomass compared to organic carbon in soil while grassland is considered one of the carbon storages in terrestrial ecosystems. Considering the situation at internal and external where the calculation of greenhouse gas inventory is being upgraded to a method with higher scientific accuracy, research on standards and methods for calculating carbon accumulation of grassland biomass is required. The purpose of this study was to identify international trends in the calculation method of the grassland biomass sector that meets the Tier 2 method and to conduct a review of variables applicable to the Republic of Korea. Identify the estimation methods and access levels for grassland biomass through the National Inventory Report in the United Nations Framework Convention on Climate Change and type the main implications derived from overseas cases. And, a field survey was conducted on 28 grasslands in the Republic of Korea to analyse the applicability of major issues. Four major international issues regarding grassland biomass were identified. 1) country-specific coefficients by land use; 2) calculations on woody plants; 3) loss and recovery due to wildfire; 4) amount of change by human activities. As a result of field surveys and analysis of activity data available domestically, it was found that there was a significant difference in the amount of carbon in biomass according to use type classification and climate zone-soil type classification. Therefore, in order to create an inventory of grassland biomass at the Tier 2 level, a policy and institutional system for making activity data should develop country-specific coefficients for climate zones and soil types.

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.

The modern Chinese copula, 是 shì, had not yet appeared in the oracle bone period. It began to emerge in Zuozhuan (左傳 ), and appeared only when expressing the judgment of complex topics. Based on the observation as such, this paper looks into the demonstrative of 是 shì, and examines its evolution before it becomes a copula. The task takes three steps: first, usages of 是 shì are investigated throughout various time periods; second, characteristics of sentences containing 是 shì are explained according to how it is used; and last, a comparison is made of sentences containing 是 shì in excavated Chu manuscripts in order to determine their properties. What can be, in fact, explained through the analysis of Chu bamboo literature in the Warring States Period (475-221 BC) are the characteristics of the transitional sentence before the development of 是 shì into the copula. First, in the bamboo slips “Sande” from the fifth volumes of “Chu bamboo slips collected in Shanghai Museum”, the object prepositional phrase appears, indicating the transitional phase in which the 是 shì phrase in the first stage advances toward the second one. “Sande” is the literature of the late Warring States Period, and has a V writing section in which the object has been transposed and no '也' has appeared at the same time. Second, apart from the situation in which the first stage is used as a subject, the situation in which the explanation part leads to NP/N fixation can be considered through the object transposition leading to the NP/N fixation of the topic part. Last, given that “邾公華鍾 (哉(載)公眉壽 ，邾邦是保 : Tsp, NP是 V)” is an article of the Spring and Autumn Period, it is estimated that 是 shì had been initially regarded as the object, and the phrase “TNP, NP＋是＋VP/V” was gradually used as a fixture through the process of the analogy and re-analysis. However, it is critical that this view be examined more closely, and therefore, further research is also needed.

This experiment was carried out to study the effects of different environmental conditions and cultivation techniques on productivity of grasslands in central and southern area of Korea on 2017 and 2018. Average dry matter yield of grasslands at 10 actual production sites was 7,496 kg/ha. that was ranged from 4,652 to 13,292 kg/ha with least significant difference(LSD) of 1,577kg/ha between grasslands (p<0.05) on 2017. Average dry matter yield of grasslands at 10 actual production sites was 7,914 kg/ha. that was ranged from 3,927 to 12,372 kg/ha with LSD of 1,577kg/ha between grasslands(p<0.05) on 2018. Dry matter(DM) yield of grasslands have positive correlation with soil fertility (p<0.01) but not correlated with rainfall and air temperature among cultivation environments. And also DM yield of grasslands have positive correlation with grassland management techniques(p<0.01). These results suggest that practices of grassland management techniques and improvement of soil fertility are more important than cultivation environments by climate change for increasing the DM yield of grassland in central and southern area of Korea.

In Ron-chens of Shangbo bamboo slips, there is “A Lou (僂)”. The first word should be read as “Fu (㾈)” in Shuowen, which refers to a hunchback. The “Fu Lou (㾈僂)” is a continuous word, which also refers to a hunchback. In the second edition of Ron-chens, there is “Lou Zhe B Shu (僂者數)”, in which “Shu (數)” should be read as “Lou (塿)” which is called “Mei T Ye (塺土也)” by Xu Xuan, it is cited as “Mo Tu Ye (摩土也)” by Xu Kai, Wang Niansun is changed to “Li T Ye (歴土也)”. According to Shangbo bamboo slips, Xu Kai is right. Bamboo slips here refer to the work of flattening loose land for hunchbacks. In Two-year Law of Zhangjiashan bamboo slips, there is “C Ren (人)”. The first word should be read as “Mian (眄)”, which refers to the blindness of human eyes in the Two-year Law and the Han bamboo slips of Xuanquan. The word “Mian (眄)” in Shuowen says “Mu Pian He Ye (目偏合也)”, There is no exact example in the ancient books, and the unearthed documents can prove their faith and have evidence.

This study was conducted to suggest the new grassland grade system on evaluating the grassland status. The grassland status has been evaluated based on the forage yield (good, fair and poor) by municipal authorities. The grassland grades by current system were 19 good, 11 fair and 11 poor among the 41 grassland farms from 6 provinces. This evaluation result differed greatly from the result of actual measurement of forage yields which showed all poor. The big difference was resulted from failing the reflection of the various characteristics, such as different seasonal growth and harvest frequency. Furthermore, the lack of consistent examining date and method added the inaccuracy of current grassland grade system. The new grassland grade system based on the grassland vegetation ratio (grass, weed and bare soil) was initially designed into 6-grade system (1st; 100~80%, 2nd; 79~60%, 3rd; 59~40%, 4th; 39~20%; 5th; 19~1% and 6th; 0% on the basis of grasses proportion), but later was changed into 4-grade system (1st, 2nd, 3rd, and 4th grades are 70% or more, 50% or more, 50% or less, and 0% of forage proportion, respectively) after reflecting the opinion of grassland farms and municipal authorities. Re-evaluation on the grassland status using the 4-grade system resulted in the total 80% consisted of 2nd, 3rd and 4th grade which means most grasslands needs the partial reseeding or the rehabilitation of entire grassland. Pictures and schematic diagrams depicting the 4-grade system were presented to improve the objectivity of evaluation. The optimal time for assessing grassland status is fall when plant height 20~30 cm. Conclusively, the 4-grade system is an efficient method for all non-professionals including grassland farms or municipal authorities in assessing the grassland status. To apply this system to the field, the institutional arrangements such as amendment of grassland act should take place in advance.

This study was conducted to find out the effects of seed mixture using new domestic grass varieties orchardgrass ‘Onnuri’ and tall fescue ‘Greenmaster’ on botanical composition and dry matter productivity from 2015 to 2018 in oversown hilly pasture, the central northern area of Korea. This experiment was consisted of 4 mixed grasses (Treatment 1 : tall fescue oriented mixture with imported varieties; Treatment 2 : orchardgrass oriented mixture with imported varieties; Treatment 3 : orchardgrass oriented mixture with domestic varieties, Treatment 4 : tall fescue oriented mixture with domestic varieties). Evaluation of seasonal changes in botanical composition of pasture showed that orchardgrass was the highest in all treatments, ranging from 46 to 89% and Kentucky bluegrass was the second highest in all treatments. Treatment 3 (7,633 kg ha-1) and Treatment 4 (7,570 kg ha-1), mixed grasses using domestic varieties, were showed the highest dry matter yield than Treatment 1(6,950 kg ha-1) and Treatment 2 (6,934 kg ha-1), which were mixed grasses using introduced varieties. Therefore, these results showed that the orchard grass oriented grasses mixture with domestic varieties was good for grassland vegetation and productivity in oversown hilly pasture, the central northern area of Korea.

최근 산림훼손이 심각하게 진행되고 있는 몽골의 수도 울란바토르 근교 산림과 초지 토양의 이화학적 특성을 분석, 비교하였다. 유기물함량은 초지토양이 평균 17.0%로, 산림토양보다 유의하게 높은 것으로 나타났다(p<0.05). 유기물함량은 해발고가 낮을수록(R2=0.742) 그리고 양이온교환용량(CEC)이 클수록 높은 경향을 보였다(R2=0.597). CEC도 초지토양이 평균 35.3cmolc + kg-1으로, 산림토양 보다 유의하게 높았고(p<0.05), 교환성 양이온 중 특히 칼슘의 집적이 높은 것으로 나타났다. 염기포화도는 평균 62.4∼129.7%로, 100%를 초과하는 토양도 많았고, 염기포화도가 높을수록 pH가 높아지는 경향을 보 였다(R2=0.665). 총질소 함량은 0.05~0.93%의 범위를 나타냈으며, 산림보다 초지토양에서 더 높았다 (p<0.05). 총질소 함량은 유기물함량이 높을수록 높은 값을 나타냈으며(R2=0.699), C/N비는 산림토양 28.8~43.0 그리고 초지토양 12.8~18.4로 각각 나타났다(p<0.05). 토양의 이화학적 특성 간 상관분석 결과, 유기물함량과 전질소, 유기물함량과 총인, 유기물함량과 CEC 그리고 토양 pH와 염기포화도는 서 로 정의 상관관계 그리고 CEC와 암모늄태 질소, 전질소와 총인 그리고 C/N비와 염기포화도는 부의 상 관관계가 각각 나타났다(p<0.05). 중금속 함량은 아연과 납이 가장 많이 검출되었으나, 도심과 비교하 면 아주 미미한 수준이었다. 이러한 연구결과들은 향후 몽골의 산림복원 과정을 모니터링 하는데 유용 하게 활용될 것으로 기대된다.

This study was conducted to investigate 106 grassland farms in six provinces including Chungcheongbuk-do, Gangwon-do, Gyeonggi-do, Gyeongsangbuk-do, Gyeongsangnam-do, Jeju-do, and Jeollanam-do to present their problems and causes by surveying the actual state of grassland farms during three years(2014~2016). The grassland survey was divided into three categories; used as the perennial grasses and annual forage crops (Complied with Grassland Act), not used as the perennial grasses and annual forage crops (Not complied with Grassland Act) and failed to meet the farmer and some items are missing or inaccurate (Insufficient contents). Among the surveyed grassland farm, 68 farms (64.2 %) were complied with Grassland Act but 30 farms (28.3 %) were not complied with Grassland Act. Especially, the 8 farms (26.7 %) not complied with Grassland Act used the grassland as other purposes such as tree growing, golf club and swine farm etc.. Therefore, strict on-site investigation by local governments is required to prevent the grassland from being used by illegal purposes. And there’s a strong likelihood that 5 farms (62.5 %) avoided the survey violate the positive law. Grassland grades used by the local administrative agencies were not influenced by the factors affecting the yield (existence and non-existence of overseeding and fertilization by grassland grade, soil pH and organic matter content). This results suggest that there is a fundamental problem on the current grassland grade system based on the yield and the irregular time of investigation and lack of on-site investigation are another causes for inaccurate grassland grade. Therefore, the new method evaluating grassland grades which is not based on yield and the thorough on-site investigation by local administrative agencies are necessary when the grassland grade is evaluated.