• 한국환경복원기술학회지
• /
• 제6권1호
• /
• pp.71-77
• /
• 2003

This research has been conducted to collect regional ecotypes of Poa pratensis throughout the southern part of korean peninsula during 2000~2002. 227 local ecotypes of Poa pratensis were collected mostly from roadsides, riversides and rice paddies. The $35^{\circ}$ latitude was supposed to be the southern limit of native Poa pratensis habitat. 130 ecotypes of Poa pratensis found from the poor environmental condition such as roadsides showed Poa pratensis naturally grew throughout the country. When surveyed the habitat environment, it was concluded that native Poa pratensis were mostly found on open fields or half shaded areas, on sandy soil or sandy loam soil, and in the individual patch type.

• 한국환경복원기술학회지
• /
• 제8권5호
• /
• pp.10-18
• /
• 2005

The research was carried out to define the morphological and growth characteristics of Poa pratensis L.(Kentucky bluegrass) 'Sewon' in native to Korea. Poa pratensis 'Sewon' was collected at the terrace land on the river in Guiman-ri, Cheongcheon-myeon, Goesan-gun, Chungcheongbuk-do on May 5, 1995. The collected Poa pratensis 'Sewon' was grown under non-mowing naturally growing condition. The morphological characteristics of Poa pratensis 'Sewon' are as follows. : The height of plant was 21.6cm but was increased to 33cm at the flowering time. The height of first node from the base was 5.0cm and the length and width of leaf were 9.6cm and 4.1cm, respectively. The length of inflorecences was 37.8cm and the length of a spike was 7.3cm. Based on these morphological characteristics, Poa pratensis 'Sewon' was defined to dwarf~medium and coarse texture type Kennturky bluegrass. 1 to 9 scale of visual quality, visual color and visual density were measured. Poa pratensis 'Sewon' showed best turf qualities among native Kentucky bluegrasses. In spring and fall growing season, Poa pratensis 'Sewon' were measured to be excellent performances for turf qulities similar to foreign excellent quality cultivars such as Midnight, Nuglade and Brilliant Kentucky bluegrasses. But turf quality of Poa pratensis 'Sewon' decreased by plant disease according to temperature increase in summe compared to foreign excellent quality cultivars. So, Poa pratensis 'Sewon' should be improved of disease tolerent quality by incessant breeding work in order to compete foreign excellent quality cultivars.

• 한국환경복원기술학회지
• /
• 제25권2호
• /
• pp.15-22
• /
• 2022

This study has been conducted to investigate the appropriate mixed sowing rates with white clover (Trifolium repens) and Kentucky bluegrass (Poa pratensis) by evaluating initial growth. Six different mixed sowing rates (CT, Control Trifolium repens; CP, Control Poa pratensis; T1P3, Trifolium repens 1 : Poa pratensis 3; T1P2, Trifolium repens 1 : Poa pratensis 2; T1P1, Trifolium repens 1 : Poa pratensis 1; T2P1, Trifolium repens 2 : Poa pratensis 1; T3P1, Trifolium repens 3 : Poa pratensis 1) with three repetitions were implemented in greenhouse experiment plastic pots (50.5 length × 35.0 width × 8.5 cm height). Plant height, leaf length, leaf width, number of leaves, root length, fresh weight, and dry weight were measured after a week from the germination for three months. Initial growth of Kentucky bluegrass significantly increased as mixed sowing rates with increasing, while that of white clover kept relatively decreasing than that in Control. Initial growth strongly affected sowing mixed rates by Kentucky bluegrass and not by white clover in this experiment, indicating that grasses played a dominant role during initial growth period. However, seeding rates with white clover will be dependent on the use of a turf and the desired green cover. There remains a need to further study of the mechanisms and dynamics of legume and grass competition to underpin sustainable management practices.

• 한국환경복원기술학회지
• /
• 제10권1호
• /
• pp.91-99
• /
• 2007

The research was carried out to define the morphological and growth characteristics of Poa pratensis L. (Kentucky bluegrass) 'Pureundul' native to Korea. Poa pratensis 'Pureundul' was collected from the belt highway around Mt. Uam located in Naedeok-dong, Cheongju City, Chungcheongbuk-do Province on May 5, 1995. The morphological characteristics of 'Pureundul' were compared with those of 205 individuals of native Poa pratensis collected throughout the nation from June 11, 2000 to June 21, 2003. The findings were as follows : The height of plant was 28.2cm but increased to 40.0cm at the flowering time. The height of first node from the base was 6.8cm and the length and width of leaf were 17.3cm and 2.9mm, respectively. The length of a spike was 7.9cm. Based on these morphological characteristics, 'Pureundul' was defined medium type Kentucky bluegrass. Visual quality(1~9), visual color and visual density were measured. The visual quality, color and density of 'Pureundul' were not superior to those of introduced species but above the average other native species. The damages from the diseases during summer resulted in poorer visual quality of color of 'Pureundul'. But the spread of the diseases was slower in 'Pureundul' than other native species, and accordingly 'Pureundul' didn't suffer from more quality deterioration from July to September during which the diseases broke out. Entering fall, 'Pureundul' showed high quality comparable to that of the introduced species. If 'Pureundul' is put to breeding by implementing pest control in summer and introducing disease tolerant genes, it will be used to make greens of greater quality than now.

• 한국환경복원기술학회지
• /
• 제6권2호
• /
• pp.21-26
• /
• 2003

2000년 9월부터 2002년 6월까지 약 50여 회에 걸쳐 전국적으로 191개체를 수집하였고, 관리 도중 고사한 38개체를 제외한 153개체의 왕포아풀의 형태적 특성의 결과는 다음과 같다. 1) 우리나라에 자생하고 있는 왕포아풀의 초장은 최저 4.5cm의 왜성형으로부터 최고 40.0cm의 고성형 까지 다양한 범위를 나타내고 있으며, 그 중 초장의 범위가 10~20cm사이에 있는 왕포아풀이 가장 많이 조사되었고 초장이 30cm를 넘는 고성형은 그리 많지 않았다. 2) 왕포아풀의 엽장은 최저 3.0cm에서 최고 30.2cm의 범위였으며, 평균 13.1cm였다. 초장과 마찬가지로 엽장의 길이도 20.0cm 이하인 것이 대다수였다. 3) 왕포아풀의 엽폭은 최저 1.0mm 세엽형으로 부터 5.0mm 광엽형까지 다양한 형태로 나타났으며, 2.0~3.5mm의 범위에 속하는 개체가 135개체로 가장 많았다. 4) 시각적 품질과 형태적 특성간의 상관분석에서는 초장, 엽장, 엽폭 등 모든 형태적 특성의 항목과 양의 상관관계가 있는 것으로 분석 되었지만, 상관계수는 낮게 나타났다. 5) 형태적 특성간의 상관분석에서는 초장과 엽장의 상관계수가 0.74로 나타나 매우 높은 상관관계가 보였고 95%의 수준에서 유의성이 나타났다.

• 한국환경과학회:학술대회논문집
• /
• 한국환경과학회 2006년도 추계 학술발표회 발표논문집
• /
• pp.399-401
• /
• 2006

• 한국환경복원기술학회지
• /
• 제13권1호
• /
• pp.69-81
• /
• 2010

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.

• 한국환경복원기술학회지
• /
• 제11권2호
• /
• pp.10-18
• /
• 2008

In this study, about 80 Kentucky bluegrass (Poa pratensis L.) ecotypes native to Korea were collected annually to analyze their morphology and growth characteristics from 1995 to 2007. Kentucky bluegrass ecotypes with superior characteristics of 'Pureundle' (Trial No. : P38), 'Sewon' (P77), 'Inje' (00034), 'Donggang' (00052), 'Hwasun' (01001), 'Pyengchang' (01071), 'Kongju' (02006), 'Chungsong' (02077), and 'Kumsan' (03005) and three foreign cultivars were transplanted to flowerpots in May 8, 2006 in order to analyze the blooming and morphological characteristics. Out of the selected superior ecotyes, six were collected on the roadsides, two were collected around paddy or dry fields, and one was collected at riverside. Length of 1st internode of 'Chungsong' was the longest (30.7cm), that of 'Pyengchang' was the shortest (12.8cm), and ecotypes showed variation in length. The 1st angle of branches of 'Donggang' was the narrowest ($141.7^{\circ}$), that of 'Hwasun' was the widest ($188.3^{\circ}$), and that of the introduced foreign cultivars were between $159.3^{\circ}$ and $166.7^{\circ}$. The number of nodes of the introduced cultivars were same (six), while that of Korean ecotypes were four to six. Length of flowering culm of 'Chungsong' was the longest (50.7cm) and while that of 'Pyengchang' was the shortest (19.2cm). 'Donggang' with the highest seed yield showed relatively high (36.8cm) inflorescence height when compared to other ecotypes. The five ecotypes of 'Sewon', 'Inje', 'Donggang', 'Pyengchang', and 'Kongju' were investigated to have relatively wide leaf width. Especially 'Sewon' and 'Inje' were investigated to have wide leaves of 4.5mm and over.

• 아시안잔디학회지
• /
• 제21권2호
• /
• pp.177-182
• /
• 2007

축구장의 식재지반이 모래로 조성될 경우 낮은 보비력과 높은 용탈율로 인해 시비관리의 조정이 필요하다. 본 실험의 목적은 PVC관을 이용한 경기장 유사모형 실험구에서 캔터키 블루그래스에 있어서 완효성비료의 생육 효과를 비교 실험하였다. 잔디의 색깔, 균일도, 생육, 지상부 생체량과배출수의 질산의 유출량을 몇 가지 다른 생육상과 네 번의 유사 강우 시험 시 행하였다. 실험 결과 요소의 성분 유출량이 가장 높았고 공시 완효성비료는 가장 낮았다. 이 완효성 비료는 다른 공시 잔디비료에 비해 14일간, 요소보다는 28일간 잔디의 품질 면에서 비효가 지속되었다. 또한 이 완효성비료는 잔디의 웃자람과 잔디깎기에 소요되는 시간을 줄일 수 있었다. 질산태 질소의 유출에 있어서도 잔디의 조성 초반기에 50% 정도를 감소 시켰다.

• 아시안잔디학회지
• /
• 제9권3호
• /
• pp.207-212
• /
• 1995

This experiment was conducted to investigate the effect of the nitrogen fertilization levels on the content of $NH_4^+$-N in soil of 'Suffolk' Kentucky bluegrass and zoysiagrass. The results obtained are summarized as follows : 1.According to the nitrogen fertilization levels, the content of $NH_4^+$-N in soil of Kentucky blue-grass and zoysiagrass was not significantly different. The content of $NH_4^+$-N in soil of Kentucky bluegrass and zoysiagrass was highest in June and December and lowest in March and September. 2.The content of $NH_3^-$-N in soil was increased by increasing the nitrogen fertilization levels in both Kentucky bluegrass and zoysiagrass. However, the deeper the depth of soil the less the content of $NO_3^-$-N in soil. In 40~60cm soil depth, the content of $NO_3^-$-N in soil was lower than 10ppm in average. Even in June, which was the highest month of the content of $NO_3^-$-N in soil, the content of $NO_3^-$-N in soil was not overpassed the degree of 20ppm.