국내에서 수집된 주요 왕포아풀(Poa pratensis L.)의 생육 특성

심상렬 ( Sang Ryul Shim ),정대영 ( Dae Young Jeong ),안병준 ( Byung Joon Ahn ),김재환 ( Jae Hwan Kim ) 한국환경복원기술학회 2010 한국환경복원기술학회지 Vol.13 No.1

The purpose of this study is to analyze the growth characteristics of native Kentucky bluegrass (Poa pratensis L.) collected in Korea. Out of Kentucky bluegrasses collected in 2000 and 2008, eight ecotypes (“Pyengchang,” “Gongju,” “Inje,” “Donggang,” “Hwasun,” “Pureundle,” “Cheongsong,” and “Geumsan”) were planted in experimental fields and pots on May 11, 2008 and May 3, 2009, respectively, for analyzing their growth characteristics. Data such as visual quality (1-9), visual density (1-9), visual color (1-9), plant height, leaf length and leaf width were analyzed. The visual quality of “Pyengchang,” “Inje” and “Gongju” were enhanced compared to the rest native ecotypes of Kentucky bluegrass. “Pyengchang” showed the best visual density while “Gongju” and “Inje” showed almost evenly favorable density. However, “Pureundle,” “Cheongsong,” and “Geumsan” represented loose density due to the damage from the summer climate of high temperature and humidity in 2009. As for visual color, “Pyengchang” was also ranked first, maintaining high values of at least 7.6 even in the summer climate of high temperature and humidity. “Donggang” showed good color immediately after planting in the experimental field in 2008, however, undesirable color due to the damage from the summer climate of high temperature and humidity in 2009.

세원 왕포아 잔디(Poa pratensis L. Sewon)의 형태 및 생육특성

심상렬 ( Sang Ryul Shim ),정대영 ( Dae Young Jeong ),안병준 ( Byung Joon Ahn ) 한국환경복원기술학회 2005 한국환경복원기술학회지 Vol.8 No.5

USGA 지반에 켄터키 블루그래스 조성 시 파종량 차이가 지상부 잔디생장 및 지하부 뿌리발달에 미치는 효과

김경남(Kyoung-Nam Kim) 한국원예학회 2023 원예과학기술지 Vol.41 No.2

This research was initiated to investigate the effects of seeding rates on top and root growth characteristics in Kentucky bluegrass (KB, Poa pratensis L.) under the USGA (United States Golf Association) soil system and to provide practical information on proper KB seeding rates. Treatments were comprised of the following five seeding rates: VLS (6 g·m-2), LS (9 g·m-2), MS (12 g·m-2), HS (15 g·m-2) and VHS (18 g·m-2). Each treatment was replicated four times in a randomized complete block design. Visual turfgrass color, turf quality and root growth were measured from May to December in 2009. Thesse growth characteristics varied with seeding rate and increased with month after seeding (MAS). Evaluation in the establishment phase indicated that the best color was associated with VHS until 3 MAS, but with HS after that. The turf quality rating score was greatest with VHS until 5 MAS, but with HS after that. Data on root growth, however, showed opposite responses as compared with those of top growth characteristics. During the study, the lower the seeding rate, the longer the root length. Therefore, the best root growth performances were associated with LS and VLS, while HS and VHS, in which the seeding rate was over 15 g·m-2, showed poor performances. In the first-year establishment phase, optimum seeding rates in KB are between 15 and 18 g·m-2 in regards to turfgrass color and quality. However, in terms of root growth, they are in the range of 6 to 9 g·m-2. Further data analysis in a mature-phase will be a practical necessity for the best turfgrass quality and sustainable performance on high-quality sports turf design, construction and management.

연구논문(硏究論文) : 국내에서 수집된 주요 왕포아풀(Poa pratensis L.)의 개화 및 형태적 특성

심상렬 ( Sang Ryul Shim ),정대영 ( Dae Young Jeong ),안병준 ( Byung Joon Ahn ) 한국환경복원기술학회 2008 한국환경복원기술학회지 Vol.11 No.2

푸른들 왕포아잔디(Poa pratensis L. Pureundul)의 형태 및 생육특성

심상렬 ( Sang Ryul Shim ),정대영 ( Dae Young Jeong ),안병준 ( Byung Joon Ahn ) 한국환경복원기술학회 2007 한국환경복원기술학회지 Vol.10 No.1

우리 나라 자생 왕포아풀의 수집지 분포 및 특성

심상렬 ( Sim Sang Lyeol ),정대영 ( Jeong Dae Yeong ),안병준 ( An Byeong Jun ) 한국환경복원기술학회 2003 한국환경복원기술학회지 Vol.6 No.1

Antioxidant enzyme activity and microRNA are associated with growth of Poa pratensis callus under salt stress

Luo Hongsong,Zhou Zhixiang,Song Guilong,Yao Hongxiang,Han Liebao 한국식물생명공학회 2020 Plant biotechnology reports Vol.14 No.4

Kentucky bluegrass (Poa pratensis L.) is an important species of turfgrass that is commonly planted on golf courses and landscapes all over the world. It is sensitive to salt stress; however, details relating to its molecular mechanisms of salt resistance are not available. We, therefore, analyzed the changes in growth, antioxidant enzyme activity, and microRNA expression in the callus 1 week after treatment with 200 mM NaCl for 12 h, 24 h, 48 h, 96 h, and 144 h. The results demonstrated that callus growth declined and thiobarbituric acid-reactive substance production and cell membrane permeability increased. Treatment with salt increased ascorbate peroxidase, glutathione reductase, superoxide dismutase, catalase, peroxidase, and polyphenol oxidase activity. Changes in the expression levels of microRNAs were observed under salt treatment. The expression of miR162, miR173, miR391, miR408, miR773, and miR857 increased by 70% after 24 h of salt treatment, after which it declined to a level similar to that of the control. The expression level of miR775 and miR827 decreased by 20% after 24 h, and then further decreased by 80% after 144 h. The expression level of miR841 increased by 50% after 24 h of salt treatment, and then stabilized. In contrast, salt treatment increased the expression of the auxin response factors ARF6, ARF8, ARF10, and ARF16 in the callus from 12 to 144 h of salt treatment, during which the expression increased twofold. Gene expression analysis indicated that salt-responsive gene families were regulated by microRNAs in the callus under salinity stress. The activity of antioxidant enzymes is also changing. MiR841 is considered to be a positive regulator of antioxidant enzyme biosynthesis. The present investigation elucidates the manner in which P. pratensis responds to salt stress in the callus, and could be used to inform further studies on the molecular mechanisms of stress tolerance.

Weed Control by Herbicides and Fertilizers Applied Separately or Combined on Kentucky Bluegrass Lawn

Deying Li(다이엥 리),Kirk Howatt(컬크 호와트) 한국잡초학회·한국잔디학회 2007 Weed & Turfgrass Science Vol.21 No.1

잔디밭 관리 시 제초제와 비료의 혼합 처리는 시간절약 및 답압감소 등 여러 가지 장점이 있다. Weed & Feed는 제초제와 비료를 혼합 조제된 제품이다. 본 실험은 캔터키 블루그래스 잔디밭에서 비료 및 제초제를 단독으로 처리할 때와 Weed & Feed를 사용할 경우 그 효과를 비교하기 위해서 시작되었다. 실험에 사용한 Weed & Feed 28-3-3에는 세 가지 제초제 - 2,4-D 0.64%, MCPP 0.31% 및 dicamba 0.03%가 혼합 조제된 약제이다. 첫 번째 처리는 5월에 실시하였고, 두 번째 처리는 6월 또는 9월에 실시하였다. 단독으로 사용한 제초제는 2,4-D(LV-4, 4EC), MCPP(4EC) 및 dicamba(Clarity, 4EC)로 Weed & Feed의 50% 및 100% 수준으로 적용하였다. 실험기간 동안 우점 잡초는 민들레였으며, 제2 우점종은 2004년에는 엉컹키, 2005년에는 왕질경이로 나타났다. 실험결과 5월과 6월에 비료와 100% 수준의 제초제를 처리할 경우 수용할 수 있는 잔디밭 품질은 각각 112.3일과 83.7일 정도 유지되엇다. 하지만 Weed & Feed를 사용할 경우에는 각각 58.7일과 83.7일로 나타났다. Weed & Feed 효과는 사용 시기에 따라 차이는 있지만 비료와 50% 수준의 제초제를 처리한 것과 유사한 효과가 있는 것으로 나타났다. 잡초 방제 시 Weed & Feed에 비해 비료와 100% 수준의 제초제를 직접 처리하는 것은 Weed & Feed를 사용하는 그 이상의 효과가 있는 것으로 나타났다. Incorporating herbicides application into fertilization has several benefits including saving time and reducing traffics on the lawn. Premixed products of fertilizers and herbicides are commonly known as Weed & Feed in the lawn-care industry. To compare Weed & Feed with separate applications of fertilizers and herbicides on a Kentucky bluegrass (Poa pratensis L.) lawn, a Weed & Feed 28-3-3, containing 0.64% 2,4-D, 0.31% MCPP, and 0.03% dicamba of active ingredients, was used in this study. The first application was in May, with the second in June or Sept. Herbicides in forms of 2,4-D (LV-4, 4EC), MCPP (4EC), and dicamba (Clarity, 4EC) were applied at rates equal to the amounts in Weed & Feed or at half of the rates. The dominant weed in both locations was common dandelion (Taraxacum officinale Weber.) in 2005 and 2004. A secondary weed was Canada thistle (Cirsium arvense (L.) Scop.) in 2004 and broadleaf plantain (Plantago major L.) in 2005. When applied in May and June, fertilizer plus full rate of herbicides treatment achieved 112.3 and 83.7 days of acceptable turf quality in 2004 and 2005, respectively. During the same period, Weed & Feed resulted in 58.7 and 24.3 days of acceptable turf quality, respectively. Our study showed that Weed & Feed was generally as effective in weed control as the same amount of fertilizer plus half rates of herbicides sprayed although results may vary due to the timing of application. Fertilizer plus full rates of herbicides provided the same or better results of weed control than Weed & Feed.

The Effect of Rootzone Mix and Compaction on Nitrogen Leaching in Kentucky bluegrass

이상국,Kevin W. Frank,James R. Crum 한국잔디학회 2010 Weed & Turfgrass Science Vol.24 No.1

Research on nitrate-nitrogen (NO3-N) leaching in turfgrass indicates that in most cases leaching poses minimal risk to the environment. Although there have been many studies investigating NO3-N leaching, there has been little research to investigate the effect of compaction level and rootzone mix on nitrogen (N) leaching. The research objective is to determine the effect of compaction level and rootzone mix on nitrogen leaching. The four rootzone mixes are 76.0:24.0, 80.8:19.2, 87.0:13.0 and 93.7:6.3 % (sand: soil). The four levels of compaction energies are 1.6,3.0, 6.1, and 9.1 J cm-2. Nitrogen was applied using urea at a rate of 147 kg ha-1 split among three applications. Rootzone was packed into a polyvinylchloride pipe with a perforated bottom to facilitate drainage. Rootzone depth was 30 cm over a 5 cm gravel layer. Each column was sodded with Poa pratensis L. Hoagland solution designed for coolseason grasses, minus N, was used to ensure adequate nutrition in the rootzone. Turf grass quality and clipping yield were recorded from each tube at two-week intervals. The clippings were oven-dried at a temperature of 67oC for 24 h and weighed. At the end of the study, root dry weight was determined by washing and oven-drying samples at 67℃ for 24 h. Leachate solution was collected weekly for analysis. More than 6.1 J cm-2 of compaction energy increased possibilities of surface runoff. The compaction energy between 3.0 and 6.1 J cm-2 produced more clipping dry weight and less N leaching than 9.1 J cm-2.

켄터키 블루그래스에서 벤트그래스의 화학적 방제

김용선,이상재 한국잔디학회 2000 한국잔디학회지 Vol.14 No.1

The purpose of this study is to select the appropriate herbicide, which is needed to control the bentgrass in kentucky bluegrass(Poa pratensis) fairway effectively. The best control of bentgrass was observed at /$0.3mL\m^2$ of dithiopyr applied on Kentucky bluegrass. A field experiment was conducted to determine the priming effects on seed germination of Kentucky bluegrass. Ground covering rates by turfgrass were investigated under field conditions for 70 treatments by thirty days after treatment. The solid matrix priming(SMP) treatments on Kentucky bluegrass reduced the number of days requited for emergence and improved final cover ratings. Primed seeds of Kentucky bluegrass (incubated for five days at $20^{\circ}C$) resulted in most rapid germination and covering rate.