Choi, Gi-jun

Ji, Hee-chung

Kim, Ki‐yong

Lee, Jong-kyung

Lim, Keun-bal

Lim, Young-chul

Park, Hyung-soo

Seo, Sung

Sung, Byung-ryul

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings XXI International Grassland Congress / VIII International Rangeland Congress Growth Characteristics and Productivity of a New Cold‐Tolerant Italian Ryegrass (Lolium multiflorum L.) Variety Kowinearly in Northern Part of South Korea Gi-jun Choi National Institute of Animal Science, South Korea Young-chul Lim National Institute of Animal Science, South Korea Byung-ryul Sung National Institute of Animal Science, South Korea Ki‐yong Kim National Institute of Animal Science, South Korea Jong-kyung Lee National Institute of Animal Science, South Korea See next page for additional authors Follow this and additional works at: https://uknowledge.uky.edu/igc  Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/21/12-1/7 The XXI International Grassland Congress / VIII International Rangeland Congress took place in Hohhot, China from June 29 through July 5, 2008. Proceedings edited by Organizing Committee of 2008 IGC/IRC Conference Published by Guangdong People's Publishing House This Event is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in International Grassland Congress Proceedings by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu. Presenter Information Gi-jun Choi, Young-chul Lim, Byung-ryul Sung, Ki‐yong Kim, Jong-kyung Lee, Keun-bal Lim, Hyung-soo Park, Sung Seo, and Hee-chung Ji This event is available at UKnowledge: https://uknowledge.uky.edu/igc/21/12-1/7 瞯 ]338　 瞯 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅱ 　Grasslands/Rangelands Production Systems——— Developing Improved PlantsGrowth characteristics and productivity of a new Cold‐Tolerant Italian Ryegrass ( Loliummulti f lorum L .) variety �Kowinearly�in Northern part of South Korea1 G i Jun Choi , 1 Young Chul L im , 1 Byung Ryul Sung , 1 K i‐Yong K im , 1 Jong K yung Lee , 1 K eun Bal L im ,2 H yung Soo Park , 1 Sung Seo and 1 Hee Chung Ji1 National Institute o f A nimal Science , RDA , Cheonan , 330‐801 , Korea ; 2 National Institute Subtrop ical A griculture ,RDA , Je j u , KoreaKey words : Italian ryegrass , cold‐tolerance , new variety ,KowinearlyIntroduction Italian ryegrass ( Lolium multi f lorum L .) has good productivity and high feed value of forage but its cultivationhas been confined to southern part of South Korea because of its poor cold tolerance . Thus , in South Korea , improvement ofcold tolerance in Italian ryegrass is very important to increase the productivity and to expand the cultivation area of Italianryegrass . A cold‐tolerant variety �Hwasan １０１�, bred in Korea ( Choi et al , ２０００ ) , was difficult to be used in cropping afterrice harvest in northern part of South Korea because of its late‐heading ( on about May ２０ ) . Therefore , it needs to breed anearly‐maturing and cold tolerant variety of Italian ryegrass in South Korea .Materials and methods This study was conducted in the Grassland and Forages Division , National Institute of Animal Science ,RDA , Korea during ２００３‐２００６ . Italian ryegrass�Hwasan １０１�,�Florida ８０�and�Kowinearly�were sown in narrow strips inplots ２ m wide by ３ m long in a randomized block design on Sept . ２５‐３０ in Suwon and on Sept . ２０‐２５ in Yonchun ,respectively . Winter field survival was checked in early spring . Herbage was harvested at heading stage for evaluating on drymatter productivity .Results and discussion Italian ryegrass �Kowinearly�was a diploid variety with green leaf color and had grow th habit of semi‐prostrate in autumn and semi‐erect type in spring . In Yonchun ( Northern part of South Korea ) , winter field survival of�Kowinearly�was ８５％ while�Florida ８０�was only ４３％ . Dry matter yield of �Kowinearly�in Yonchun was ３１％ more thanthat of �Florida ８０�( ie . ７ ,３６４ kg ha‐１ .) . In Suwon ,�Kowinearly�headed on May ７ , being ２ days later than that of �Florida８０�; but in Yonchun �Kowinearly headed on １２ May , which was １ day earlier . These results indicated that Kowinearly had agood cold‐tolerance and started grow th earlier than �Florida ８０�in spring af ter wintering .Table 1 Di f f erences in dry matter y ield and w inter f ield surv iv al between two Italian ryegrass varieties Kow inerly andFlorida in Yonchun o f Korea , during 2003– 2006 ．Variety Winter field survival ( ％ ) Dry matter yield ( kg ha‐１ )２００３ 眄２００４ 唵２００５  ２００６ 父Mean ２００３ ２００４ ２００５ 鼢２００６ 珑MeanKowinearlyFlorida ８０ h９３８５ 靠９０９０ X９３５７ 耨８５４３ 妸９０６９ #１３ ,１２５a 倡１１ ,９５０a １３ ,７０１a１１ ,６７６b ５ ,５１３a２ ,２６３b ６ ,３０９a３ ,５６５b ９ ,６６２７ ,３６４ Ζ倡 means within a column followed by a same letter indicate non‐significant difference at P＝ ５％ .Conclusions Italian ryegrass variety �Kowinearly�was an early‐maturing and cold‐tolerant variety that can be recommended forcropping after rice harvest in northern part of South Korea .

Growth Characteristics and Productivity of a New Cold‐Tolerant Italian Ryegrass (\u3cem\u3eLolium multiflorum\u3c/em\u3e L.) Variety Kowinearly in Northern Part of South Korea

https://uknowledge.uky.edu/cgi/viewcontent.cgi?article=3245&amp;context=igc

Growth Characteristics and Productivity of a New Cold‐Tolerant Italian Ryegrass (\u3cem\u3eLolium multiflorum\u3c/em\u3e L.) Variety Kowinearly in Northern Part of South Korea

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