• 한국초지조사료학회지
• /
• 제17권4호
• /
• pp.387-398
• /
• 1997

This experiment was to investigate the surface coverage, sward height and dry matter yield of 63 perennial ryegrass cultivars with control cultivar, orchardgrass(Potomac) at different cutting dates(May 25, July 5, August 20 and October 5), in order to select the adaptable cultivars of perennial ryegrass in the middle region of Korea. Four perennial ryegrass cultivars, E.V. Meadea, Aberystwyth S101, Raidor and Real, didn't survive afler sowing. Surface coverage of perennial ryegrass cultivars cut in August 20 was lower than others. Sward height of perennial ryegrass cultivars at each cutting dates was lower than that of orchardgrass. There were no significant differences in sward heights of each cutting date. Dry matter yield of perennial ryegrass cultivars cut in August 20 was lower than others. Total dry matter yield of Oakpark 6% Viktoria, Petra, G. Manawa, and Kangaroo Valley was fell in the range of 11.76 and 10.37t/ha while that of orchardgrass was 12.09t/ha. On the basis of total annual dry matter yield, the adaptability of perennial ryegrass cultivars was classfied as following.

• 아시안잔디학회지
• /
• 제5권1호
• /
• pp.23-32
• /
• 1991

The purpose of this study was to determine the vegetative growth of two cool season turfgrasses during summer season in Korea. Ten respective cultivars of Kentucky bluegrass [Poapratensis L.] and perennial ryegrass [Lolium perenne L.] were exposed to unshaded, 30% and 60% shade for 4odays. First mowing height was 7cm, and then clippings were harvested every ten days at the same height. Shading increased the total length of clippings of all cultivars of two turfgrasses, but fresh and dry weight were significantly decreased. The highest shoot length obtained at 30% shade in Kentucky bluegrass and at 60% shade in perennial ryegrass. 'Rugky', 'Sydsport', 'Wabash' and 'Baron' of Kentucky bluegrass and 'Repel', 'Omega II', 'Ovation', 'Linn', 'Bell' and 'Manhattan' of perennial ryegrass showed relatively high tolerance to shade. Especially, in 'Citation II' perennial ryegrass, fresh and dry weight were increased by 30% shade. The number of tillers generally decreased with increasing shade. In 30% shade, 'Midnight' Kentucky bluegrass and 'Omega II' perennial ryegrass were least reduced and 'Baron' Kentucky bluegrass and 'Pennant' perennial ryegrass were most reduced. The cultivars of lower growth habit in full sunlight showed shade tolerance compared to those of higher growth habit.

• 한국초지조사료학회지
• /
• 제11권4호
• /
• pp.230-235
• /
• 1991

일년생과 다년생식물의 생육환경으로써 토양인산 수준의 영향에 관하여 검토하였다. 1. 일년생의 IRG(Italian ryegrass)와 다년생의 PRG (Perennial ryegrass) 모두 인산시비량이 많을수록 초장이 길어지는 경향을 나타내었다. 2. 2년차 이후는 모든 처리구에서 PRG가 IRG에비하여 건물량이 많았다. 3. 다P처리에 대한 무P처리의 P수량 비율은 1년째부터 3년째에 걸쳐 IPG의 경우 건물량과 같이 매년비율이 커지는 것에 대하여 PRG의 경우는 매년 오히려 처리간의 차가 작아지는 경향을 나타냈다. 4. 다년생의 PRG는 일년생의 IRG에 비하여 고인산환경하에서 보다 저인산 환경하에서의 생육이 유리하여지는 경향을 나타내었다.

• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2017년도 9th Asian Crop Science Association conference
• /
• pp.211-211
• /
• 2017

This experiments were conducted to investigate seed germination to evaluate the influence of anaerobic digestate on seed germination of perennial ryegrass seeds. The study conducted a germination experiment in petri-dishes, using perennial ryegrass seeds. The treatments were compared: non-treated control treated with distilled water, different concentration of anaerobic digestate. The germination percentage of perennial ryegrass seeds was highest in the fermented anaerobic digestate treatment. Root length of perennial ryegrass seeds was long by 4~5cm in the fermented anaerobic digestate with unfermented anaerobic digestate. In the relative root length ratio was by 30% higher in the in the fermented anaerobic digestate with unfermented anaerobic digestate. The germination index of perennial ryegrass seeds was high by 113% in the fermented anaerobic digestate compared to no treatment. The fermented anaerobic digestate have shown stimulatory effects in germination and development of root. Use of fermented anaerobic digestate can be recommended to farmers as a ecofriendly practice for better germination and growth.

• 한국초지조사료학회지
• /
• 제8권1호
• /
• pp.14-19
• /
• 1988

본 실험은 가을에 파종하여 월동전 예취 높이를 달리 하였을 때 공식초종의 탄수화물함량변화, 월동성 및 다음해 봄철 수랑에 미치는 영향을 구명하기 위해 초종(Italian ryegrass, tall fescue, perennial ryegrass)을 주구로 하고 월동전 예취 높이 (무예취, 6cm, 15cm)를 세구로 하여 분활구배치 3반복으로 설계하여 수행한 결과는 다음과 같다. 1. 초종별 예취 높이에 따른 목장내 온도변화는 tall fescue > perennial ryegraa > Italian ryegrass 순으로 높게 나타났으나 예취 높이 간에는 일정하지 않았다. 2. 월동전 초종별 평균저장탄수화물 함량은 세초종 모두 무예취>15cm 예취>6cm 예취순으로 나타났으며 초종간에는 Italian ryegrass > perennial ryegrass > tall fescue 순으로 높게 나타났다. 한편 월동율은 초종간 예취 높이에 차가 없었다. 3. 생초수량에 있어서는 초종간에서 Italian ryegrass>perennial ryegraa>tall fescue 순으로 높게 나타나 유의성(P<0.05)이 나타났으나 건물수량에 있어서는 초종간, 예취 높이간 모두 유의성 (P>0.05)이 나타나지 않았다.

• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2017년도 9th Asian Crop Science Association conference
• /
• pp.212-212
• /
• 2017

This experiments were conducted to evaluate the influence of Chlorella culture solution on seed germination of perennial ryegrass seeds. Chlorella are known to contain different bioactive compounds. In present research work, Chlorella culture solution using liquid manure as medium have been used to study their effects on germination and root length. The study conducted a germination experiment in petri-dishes. Four treatments were compared: non-treated control treated with distilled water, Chlorella culture solution and Chlorella culture filtrate, and liquid manure. The germination percentage of perennial ryegrass seeds was highest in the Chlorella culture solution treatment. Days required for 50, 70% seed germination was the fast in Chlorella culture solution and the Chlorella culture filtrate treatment. Root length of perennial ryegrass seeds was long by 1~2cm in the Chlorella culture solution compared with no treated control. The germination index of perennial ryegrass seeds was high by 180~202% in the Chlorella culture solution treatment compared to no treatment. Chlorella culture solution and the Chlorella culture filtrate have shown stimulatory effects in germination and development of root. Use of Chlorella culture solution and the Chlorella culture filtrate can be recommended to farmers as a ecofriendly practice for better germination and growth. Present research work reveals that Chlorella contain certain growth promoting substances which enhances seed germination.

• 한국초지조사료학회지
• /
• 제11권4호
• /
• pp.222-229
• /
• 1991

겉뿌림초지 개량효과를 높이기 위해 질소시비수준과 보조초종 라이그라스 조합의 필요성 여부를 구명키 위해 4처리 질소시비수준(0, 100, 200, 300kg/ha)과 3처리 혼파조합(A; orchardgrass+ladino clover, B; orchardgrass+ladino clover+perennial ryegrass, C; orchardgrass+ladino clover+perennial grass+Italian ryegrass)으로 본 시험이 수행되었다. Perennial ryegrass, Italian ryegrass 및 dine clover의 정착률은 질소증시로 증가되었고 ladino clover 의 정착률은 ryegrass조합으로 감소되는 경향이었다. 화본과 목초의 식생구성율을 질소증시에 따라 증가하지만 두과목초와 기존야초류는 감소하였으며 예취회수가 진행됨에 따라 목초율이 증가되고 있다. 목초의 건물수량은 질소시비량에 비례하여 유의적으로 증가하였으며(P<0.05), orchardgrass十ladino clover조합구가 다른 조합구에 비해 수량이 높았으나 유의차는 없었다(P<0.05). 그러나 예취시기별로 볼때 orchardgrass+ladino clover 혼파구의 목초수량이 2회 예취시에만 타 혼파조합구 보다 유의적 증수가 이뤄졌고(P<0.05), orchardgrass十ladino clover조합구에서 기존야초류의 건물수량이 1회와 2회 예취시에만 타 조합구에 비해 유의적 감소를 보였다(P<0. 05). 본 시험의 결론으로는 겉뿌림으로 초지를 개량하기위해서 질소를 적어도 300kg/ha 시용해야 하며 orchardgrass와 ladino clover조합이 이 기본조합에 ryegrass류를 혼파하는 것보다 유리하다고 사료된다.

• 한국조경학회지
• /
• 제30권3호
• /
• pp.86-93
• /
• 2002

The objectives of this research were to investigate the effect of serpentine as a new soil conditioner for growth of turfgrass. To achieve the goal, pure sand or mixtures of sand and serpentine with various ratios were tested for soil physical properties and the growth effects of perennial ryegrass and zoysiagrass growth were compared. Major results of this research are summarized as follows; 1) Hydraulic conductivity of 10~30% serpentine mixtures were observed within the range of 1010~901mm/h which is good for USGA recommendation. Experimental results of pH and EC for various mixtures indicated that the 10% serpentine mixture was the most suitable for turfgrass growth. 2) Perennial ryegass treated with 10% serpentine mixture showed the highest visual quality(p<0.01) among all treatments. And serpentine treatment was more effective to improve visual quality of perennial ryegrass than that of zoysiagrass. The treatment of 10% serpentine had better visual qualities than that of 20% in both of zoysiagrass and perennial ryegrass. Treatment with the right amount of serpentine extends green period for one to two weeks during early winter in both zoysiagrass and perennial ryegrass. 3) In perennial ryegrass, the treatment of 10% serpentine resulted in an increase of total dry weight compare with those of zeolite or barley stone, and also dramatically promoted the dry weight by 15% compared with sand 100%(control). Total dry weight of zoysiagrass treated with 10% serpentine was 9％ higher than that of san. These results indicated that serpentine can be a good soil conditioner for both zoysiagrass and perennial ryegrass when it is blended with sand within a range of 10 to 20% by volume.

• 한국환경과학회지
• /
• 제31권4호
• /
• pp.311-318
• /
• 2022

In this study, we analyzed the relationships between weather factors and photosystem II activity (F_v/F_m), as a measure of photochemical efficiency, in three cool-season turfgrasses commonly planted on golf courses in Jeju, South Korea: perennial ryegrass (Lolium perenne L.), Kentucky bluegrass (Poa pratensis L.), and creeping bentgrass (Agrostis palustris Huds.). In all three turfgrasses, F_v/F_m was higher during late summer than during early summer. However, in late summer, F_v/F_m was significantly lower in perennial ryegrass than in the other two species. In early summer, F_v/F_m in perennial ryegrass and Kentucky bluegrass was positively correlated with mean low temperature and extreme minimum temperature, whereas, in late summer, this parameter in Kentucky bluegrass and creeping bentgrass was positively correlated with relative humidity, and in creeping bentgrass was negatively correlated with mean high temperature, mean low temperature, and extreme maximum temperature. These results indicate that raising low temperatures is favorable for perennial ryegrass and Kentucky bluegrass in early summer, whereas, in late summer, the lowering of high temperatures proves to be beneficial for creeping bentgrass, and raising relative humidity is conducive to the growth of Kentucky bluegrass and creeping bentgrass. These findings will contribute to improving the selection and management of turfgrasses on golf courses and sports fields.

• 아시안잔디학회지
• /
• 제16권1호
• /
• pp.1-10
• /
• 2002

Creeping bentgrass 'Penn-Al', Perennial ryegrass 'Palmer ll', Kentucky bluegrass 'Nassou', Tall fescue 'Boonsai 2000'의 생육에 대한 칼슘의 영향을 온실에서 조사하였다. Creeping bentgrass 'Penn-Al', Kentucky bluegrass 'Nassou'와 Tall fescue'Boonsai 2000'의 shoot 생육은 Ca 4.0me/L에서, Perennial ryegrass 'Palmer II'는 Ca 2.0me/L.에서 가장 양호하였다. Creeping bentgrass 'Penn-Al', Perennial ryegrass 'Palmer II'와 Kentucky bluegrass 'Nassou'의 뿌리생육은 Ca 1.0me/L, Tall fescue'Boonsai 2000'는 Ca 4.0me/L에서 가장 양호하였지만 처리간에 큰 차이는 없었다. Creeping bentgrass 'Penn-Al'와 Kentucky bluegrass 'Nassou'의 분얼수는 Ca 4.0me/L., Perennial ryegrass 'Palmer II'는 Ca 1.0me/L에서 가장 많았으며, Tall fescue 'Boonsai 2000'의 분얼수는 Ca 4.0me/L에서 가장 많았지만 처리간 유의성은 없었다. 식물체 내 무기성분 함량은 Ca 처리 농도가 높을수록 Ca 함량이 많았고, 반대로 Mg 함량은 감소하였으며, Fe는 Ca 4.0me/L까지는 함량이 증가하였고, N, P, K, Zn는 큰 영향이 없었다. 식물 영양실험에 있어서 심지화분의 이용성은 정확도와 간편성이 탁월하여 앞으로의 연구에 많이 적용될 수 있음을 확인하였다.