Gierus, M.

Herrmann, Antje

Lösche, M.

Salama, H.

Taube, Friedhelm

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings XXI International Grassland Congress / VIII International Rangeland Congress Effect of Genotype and Cutting System on Agronomic and Feed Quality Characteristics of Perennial Ryegrass (Lolium perenne L.) Grown in Three Sites in Northern Germany H. Salama University of Kiel, Germany M. Lösche Universityof Kiel, Germany Antje Herrmann Universityof Kiel, Germany M. Gierus University of Kiel, Germany Friedhelm Taube Universityof Kiel, Germany 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/21/15-1/16 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. 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅱ 　 瞯 663　 瞯Grasslands/Rangelands Production Systems ——— Forage Quality ,Conservation and UtilizationEffect of genotype and cutting system on agronomic and feed quality characteristics of perennialryegrass (Lolium perenne L .) grown in three sites in northern GermanySalama H . , L迸sche M . , Herrmann A . , Gierus M . and Taube F .University o f Kiel , Grass and Forage Science/Organic Agriculture , Institute o f Crop Science and Plant Breeding , D‐24118Kiel , Germany , E‐mail :salama ＠ uni‐kiel .deKey words : perennial ryegrass ,ploidy level ,digestibility ,fibreIntroduction Perennial ryegrass is the most widely used species in grassland in temperate regions . The main target of thecurrent study is to investigate the differences between some diploid genotypes and the tetraploid derivatives that share a similargenetic background . In this paper , results of the first growing season regarding fiber fractions , digestible organic matter(DOM) , and metabolizable energy ( ME) content are presented and discussed .　 Figure 1 Di f f erences in 1st cut NDF ％ (1 .a) , ME MJ kg‐1 （ 1 ．b) , ADF ％ (1 .c) and DOM ％ (1 .d) between 2n and 4n withinthe same p loidy f amily .Materials and methods A Lattice Design was used toevaluate ２５ genotypes under two cutting regimes . These２５ genotypes ( ２０ Lolium perenne , ３ L . multi f lorum ,and ２ Festuca p ratense ) belonged to ９ ploidy families ,each consisting of one diploid genotype and thetetraploid near isogenic line( s ) derived from it . First cutand annual forage quality was estimated by NIRS , thenNDF and ADF were determined using the semiautomaticANKOM apparatus ( Van Soest et al . １９９１ ) . DOM ( gkg‐１ DM) and ME ( MJ kg‐１ DM) were calculated accordingto WeiBbach et al . (１９９９ ) .Results Since the main target is to highlight the impact ofploidy level , only the significant interactions including geno‐types will be presented . In the １st cut ( Figure １ ) the ２ngenotypes in families A , E and I were superior over their ４nderiv‐atives for NDF and ADF contents . On the contrary ,the ４n of the families A , E and F showed higher valuesthan the ２n of the same families for DOM . The trend wasnot clear in the amount of ME produced .Concerning the annual average , the significant influence ofthe ３‐way inter‐action ( site倡 genotype倡 cutting regime) wasclear only in few ploidy families ( Figure ２ ) . For example ,Figure 2 Di f f erences in an‐nual NDF , ADF ％ ( 2 .a ) , DOM ％ ( 2 . b ) andME MJ kg ‐1 (2 .c) between2n and 4n within the samep loidy f amily .in families E , F and I the ２n genotypes showed higher NDFvalues than their ４n derivatives .Conclusion The unclear trend of the ２n genotypes andtheir ４n derivatives observed in this study may beattributed to the genetic makeup of the near isogeniclines incorporated in the study , as the effect of ４n onquality parameters is dependent on the geneticbackground of the genotypes ( Smith et al . ２００１ ) .Therefore , more attention should be paid to the geneticconstitution of the genotypes under comparison .ReferencesSmith K . F . , Simpson R . J . , Culvenor R . A . ,Humphreys M . O . , Prud Homme M . P . and OramR . N . ２００１ . The effect of ploidy and a phenotypeconferring a high water‐soluble carbohydrateconcentration on carbohydrate accumulation , nutritivevalue and morphology of perennial ryegrass ( Loliumperenne L .) . J . Agr . Sci . １３６ :６５‐７４ .Van Soest P . J . , Robertson J . B . , Lewis B . A . １９９１ . Methods of dietary fibre , neutral detergent fibre , and non‐starchpolysaccharides in relation to animal nutrition . J . Dairy Sci . ７４ :３５８３‐３５９７ .Weiβbach F . , Kuhla S . , Schmidt L . and Henkels A . １９９９ . Estimation of the digestibility and the metabolizable energy ofgrass and grass products . Proc . Soc . Nutr . Physiol . ８ : ７２ .

Effect of Genotype and Cutting System on Agronomic and Feed Quality Characteristics of Perennial Ryegrass (\u3ci\u3eLolium perenne\u3c/i\u3e L.) Grown in Three Sites in Northern Germany

https://uknowledge.uky.edu/cgi/viewcontent.cgi?article=3522&amp;context=igc

Effect of Genotype and Cutting System on Agronomic and Feed Quality Characteristics of Perennial Ryegrass (\u3ci\u3eLolium perenne\u3c/i\u3e L.) Grown in Three Sites in Northern Germany

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