• 한국초지조사료학회지
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• 제13권2호
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• pp.122-131
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• 1993

This study was conducted in 1991 and 1992 to determine the effects of winter annual forage corps such as winter rye (Secale cereale L.), rape (Brassica napus subsp. oleifera L.), oats (Auena satiua L.), crimson clover (Trifolium incarnatum L.), vetch (Vicia satiua L.) and Italian ryegrass (Lolim multiflorum Lam.) on subsequent growth, yield and quality of silage corn (Zea mays L.). The winter annual forage crops were seeded at the end of August and harvested in the fall and spring before corn planting. Corn-leaf numbers, plant heights and LA1 were generally reduced during early development when corn followed Italian ryegrass(P<0.05) and winter rye, but the silking date of corn was not affected by the winter annual forage crops. Corn dry matter and TDN yields were significantly reduced when corn followed Italian ryegrass and late maturing Kodiak winter rye. The yield reductions for corn following Italian ryegrass and Kodiak winter rye, relative to corn which did not follow the winter annual forage crops, were 49 and 19% respectively. but the corn yield was slightly improved by 2 and 3%, respectively. when corn followed crimson clover and vetch. No quality differences in corn stover were observed among the treatments except for the lowest ADF and NDF contents and the highest IVDMD where corn followed ltaliabn ryegrass.

• 한국환경과학회지
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• 제31권4호
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• pp.311-318
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• 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.

• 한국농림기상학회지
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• 제16권2호
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• pp.103-113
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• 2014

우리나라에서의 사료작물 생산면적이 제한적이기 때문에 미래의 기후조건에서 최적 재배 가능 지역을 중심으로 이탈리안 라이그라스와 같은 사료작물의 생산체계를 설계하는 것이 필요하다. 특히, 한반도를 대상으로 이탈리안 라이그라스의 재배 가능지역을 파악하는 것이 미래를 대비한 정책 결정에 도움을 줄 수 있다. 이번 연구에서는 기후자료를 기반으로 작물의 재배적합도를 예측하는 EcoCrop 모델을 사용하여 현재(1950~2000), 2020년대(2010~2039), 2050년대(2040~2069), 2080년대(2070~2099)의 이탈리안 라이그라스의 재배 가능지역을 분석하였다. 또한, 전구 기후모델인 CCCMA, CSIRO, UKMO-HadCM3, UKMO-HadGEM1, 그리고 NCAR 모델 등으로부터 얻어진 규모축소 기후자료를 활용한 앙상블 예측기법을 재배적합도 예측에 적용하여 미래 기후변화 조건에서의 불확실도를 낮추는 것을 시도하였다. 2050년대까지 이탈리안 라이그라스의 재배적합도는 남한과 북한 모두 크게 상승할 것으로 예측되었다. 예를 들어, 현재 기후조건에서 충청북도와 강원도에서 평균적인 재배적합도가 76.75와 44.77으로 낮게 예측되었지만 2020년대에 각각 16.2% 및 46.1% 증가하여 2080년대에는 모든 행정구역에서 평균적인 재배적합도가 90이상으로 나타날 것으로 예측되었다. 반면, 2080년대에 16개의 시 도 중 11개의 지역에서 재배적합도가 감소할 것으로 예측되었다. 북한의 경우 현재 기후조건에서 평균적인 재배적합도는 28.40으로 평균적인 재배적합도가 낮았다. 그러나 기후변화가 진행되면서 재배적합도가 크게 증가하여 2080년대에는 14개 행정구역 중 10곳에서 평균적인 재배적합도가 80 이상일 것으로 예측되었다. 특히 나선, 신의주 및 개성 인근 지역의 재배적합도가 크게 증가할 것으로 예측되어 이를 중심으로 수출을 위한 사료 생산단지 및 축산단지 조성이 가능할 것으로 예상되었다. 현재, 내한성 향상을 중심으로 이탈리안 라이그라스의 새로운 품종들이 개발 및 보급되고 있어 이러한 신품종을 대상으로 한 이모작 가능지를 구분하기 위해 품종별로 최적화된 모수를 활용한 재배적합도 예측지도를 작성연구가 연구가 필요할 것으로 사료되었다.

• 한국초지조사료학회지
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• 제18권1호
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• pp.35-42
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• 1998

Eleven Italian ryegrass cultivars were examined for their genetic polymorphisms and phylogenetic relationships using randomly amplified polymorphic DNA (RAPD) markers. In RAPD analysis of 34 random primers, 96 of total 162 bands obtained from 16 primers were polymorphic and sizes of polymorphic band ranged between 0.5 and 1.5kb. Number of bands amplified per primer was varied from 3 to 16 and average number was 14.8. Phylogenetic relationship among cultivars based on the RAPD analysis was examined using UPGMA computer program. In pairwise genetic similarity test of 11 Italian ryegrass cultivars, Grazer and Orlando showed highest coefficient of genetic similarity as 0.740, whereas Marshall and Orlando was lowest as 0.438. Eleven Italian ryegrass cultivars were grouped into 3 major clusters and genetic distance of clusters ranged between 0.567 and 0.646, indicating low level of genetic variation.

• 한국초지조사료학회지
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• 제10권3호
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• pp.121-128
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• 1990

Germination of Italian ryegrass and sorghum were measured at a range of temperatures and with PEG treatment at several different levels of concentration and treatment period to evaluate the effects of osmoconditioning with polyethylene glycol(PEG-8000). The results obtained are summarized as follows: 1. Cumulative germination percentage of intact Italian ryegrass seeds did not show much difference among temperatures, while that of sorghum seeds decreased markedly at low temperature. 2. Italian ryegrass seeds osmoconditioned with 20% PEG solution for two days at 10^{\circ}C.$ accelerated germination at 10^{\circ}C.$, with injurious effect of osmoconditioning at higher temperature for many days. 3. Osmoconditioning with 20% PEG solution for two or four days at 10^{\circ}C.$ increased germination of sorghum seeds, while the seeds treated at higher temperatures for long period suppressed germination.

• Asian-Australasian Journal of Animal Sciences
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• 제2권3호
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• pp.336-337
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• 1989

• 한국초지조사료학회지
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• 제22권3호
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• pp.209-212
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• 2002

이탈리안 라이그라스(Lolium multiflorum Lam.) 계통 A의 약(葯) 배양을 실시하여 약(葯) 유래의 식물체를 생산하였다. MS 기본배지에 sucrose 30 g/$\ell$, NAA 2 30 mg/$\ell$, kinetin 1 30 mg/$\ell$을 첨가한 캘러스 유도배지에서 배양 20일만에 약(葯) 유래의 캘러스를 유도하였다. 캘러스 유도율은 9.2%였으며, 캘러스의 평균 크기는 8.6mg/callus/anther 였다. MS 기본배지에 sucrose 30 g/$\ell$, NAA 1 mg/$\ell$, kinetin 2 mg/$\ell$을 첨가한 재분화 배지에 캘러스를 치상하여 배양 50일에 완전히 재분화된 식물체를 얻었으며, 캘러스로부터 식물체로 재분화되는 비율은 26% 였다.

• 한국초지조사료학회지
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• 제16권4호
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• pp.299-306
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• 1996

This experiment was conducted from 1991 to 1993 at the forage experimental field, College of Agriculture and Life Sciences, SNU, Suweon to investigate the effects of previous crop residues on growth and yield of succeeding corn(2ea mays L.) and also to determine the best double cropping system necessary to maximize the total dry matter yield of winter forage crops plus corn for silage. In this experiment, treatments consisted of no crop as a control, late maturing Kodiak rye(Seca1e cereale L.), Bamapoli forage rape(Brassica napus Subsp. oleifera L.), G-sprinter oats(Avem sativa L.), Chief crimson clover(Trifolium incarnatum L.), Jackson Italian ryegrass(lo1ium rnultiJlorum L.), Vantage vetch(Vicia sativa L.) and early maturing Koolgrazer rye(Seca1e cereale L.). Corn leaf number and silking date were not significantly affected by previous crop residues, but the leaf number of corn following Italian ryegrass was reduced by 1.9 relative to no previous crop. The plant height and LA1 were significantly reduced during early development when corn followed Italian ryegrass and late maturing Kodiak rye (p<0.05). The dry matter and estimated TDN yields of corn were significantly reduced when corn followed Italian ryegrass and late maturing Kodiak rye. The yield reductions for corn following Italian ryegrass, late maturing Kodiak rye and early maturing Koolgrazer rye, relative to com when no previous crops were planted, were 34, 17 and 8%, respectively. Therefore, the reduction in corn growth and yield in this experiment could be explained by an allelopathic effect resulting from the Italian ryegrass and rye residues. The highest total dry matter yield of 30,509kg/ha was obtained from an early maturing rye-corn double cropping sequence in combination among the eight cropping systems.

• 한국초지조사료학회지
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• 제21권4호
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• pp.181-190
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• 2001

This study was conducted to investigate the effect of swine liquid manure(SLM) and phosphorus fertilizer from September, 1998 to July, 1999 on the soil fertility on Italian ryegrass field, Cheju volcanic ash soil. pH(lst investigated), Mg (2nd investigated) and Cu content (2nd investigated) on soil grown by Italian ryegrass were significantly increased by an increase of fertilizer P(P

• 한국조경학회지
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• 제30권3호
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• pp.86-93
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• 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.