Li, Haiyan

Yang, Yunfei

Zhao, Yu

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings 21st International Grassland Congress / 8th International Rangeland Congress The Growth of Size on Cynodon dactylon Clone in Yili River Valley Yu Zhao Northeast Normal University, China Haiyan Li Northeast Normal University, China Yunfei Yang Northeast Normal University, China 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/21/1-4/9 The 21st International Grassland Congress / 8th 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. 瞯 ]158　 瞯 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅰ 　Grasslands/Rangelands Resources and Ecology ——— Ecology of Grasslands/RangelandsThe growth of size on Cynodon dactylon clone in Yili River ValleyZhao Y u１ ,２ ,L i H ai‐yan１ ,Y ang Yun‐f ei１１ Key L aboratory o f Vegetation Ecology , M inistry o f Education , Institute o f G rassland Science , Northeast NormalUniversity ; Changchun 130024 ,China ,２ Chemistry and Bioscience School , Y ili Normal College ,Y ining ,835000 ,China . E‐mail , yangy f ＠ nenu .edu .cnKey words : Cynodon dacty lon , clonal grow th , bud , rhizome , stolonIntroduction Cynodon dacty lon ( bermudagrass , bevilgrass ) is a typical clonal , perennial , C４ stoloniferous and rhizomatousgrass from tropical and warm‐temperate areas ( Larry , １９８９ ; Fei et al . , １９９８) . It is one of the most important turf grass andvaluable pasture grass . It can reproduce vegetatively from both rhizomes and stolons or reproduce sexually by seeds . Theextensive network of rhizomes and stolons is easy to become a monodominant community , forming a dense tuft on the surface ofthe soil . Researches on population grow th and modular quantitative characteristics were important and useful for revealing themechanism of bioecological adaptation as well as enriching the ecological theory and application .Materials and methods This study was conducted in an abandoned orchard field covered with construction waste and gravel ,beside a playground of Yili Normal College , located in Yining city , Xinjiang , which geographically belongs to Yili river valley .In October , thirty wild C . dacty lon clones were sampled randomly . Their aboveground and underground parts were dugtogether and maintained the natural integrity . In the laboratory , the radius of each clonal tuf t and the length of stolon andrhizome were measured , meanwhile , the number of reproductive ramets and vegetative ramets was counted , respectively .　 　 Figure 1 Relationship between the ramet area and the modules o f Cynodondactylon .倡 倡 P＜ 0 .01 .Results Statistic analysis showed that therewas a significant positive correlation betweenthe tuft area and the number of vegetativeand reproductive ramet , number of stolonbud and rhizome bud , length of stolon andrhizome ( P ＜ ０ . ０１ ) . As the tuft areaincreased , the number of ramet and stolonbud , length of stolon increased gradually bya power function . At the same time , thenumber of rhizome bud , length of rhizomelinearly increased . Their simulated equationsand the significance tests were shown inFigure １ . The mean number of vegetativeramet was approximately four times morethan that of reproductive ramet as well as thenumber of rhizome bud was nearly four timesmore than that of stolon . The mean lengthof rhizome is ５畅１ metres while the mean ofsolon is just ３ .２ metres .Conclusions When C . dacty lon cloneimmigrated to a natural habitat and grewwithout inter‐specific competition , inorder to fight for the maximum expansionof space , first of all , the rhizomeselongated as soon as possible to increaseits spatial distribution . The elongatedrhizomes produced more buds , i .e . thepotential population laid a solid foundationfor the aboveground spatial expansion .Although as the tuft area increased , the number of ramets and buds , the length of stolon and rhizome increased differently ,rhizomatous elongation grow th and buds presented the most important contribution to the size of C . dacty lon .ReferencesMitich , L . W . , (１９８９) .Bermudagrass . Weed Technology , ３(２ ) : ４４３‐４４６ .Fei , Y .J . , Gan , C .X . , Liu , Z . X . , ( ２００６ ) . Ecological characteristics of Cynodon dacty lon clone in different habitats .Pratacultural Science , ２３ (１０) :８０‐８３ .ifj ifj y = 474.72x0A 606 ...... y = 151.24x0.7156 ...... <I) <I) 900 s 300 s r = 0.7581** o:l r=O.744O** o:l ..... ..... <I) 600 • <I) 200 ' • > . :: '.,;:j ...... 300 (.) 100 o:l ::l ...... <I) "O of) 0 <I) 0 ... 0 > 0.. <I) 0 0.2 0.4 0.6 0.8 1 ~ 0 0.2 0.4 0.6 0.8 1 ~ ~ y = I 2.628x0 8784 s 30 '--./ s 30 y= 13.891x+2.2664 20 r = 0.9171** ..q 20 r=O.6719** ..q ...... ...... of) of) q 10 ::: 10 - ~ ~ <I) q 0 s 0 0 0 0 0 0.2 0.4 0.6 0.8 N 0 0.2 0.4 0.6 0.8 ...... ~ VJ ifj 600 y = 265.54x0 8264 ifj 1200 y = 829.53x + 121.04 "O r=O.8519** E 400 "O ::l 800 ::: • ~ B 200 • <I) s 400 0 0 ...... • VJ 0 ·;::i 0 0 0.2 0.4 0.6 0.8 @ 0 0.2 0.4 0.6 0.8 Tuft area (m2 ) Tuft area ( m2 ) 

The Growth of Size on Cynodon dactylon Clone in Yili River Valley

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The Growth of Size on Cynodon dactylon Clone in Yili River Valley

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