Golińska, Barbara

Goliński, Piotr

Rzeźnik, A.

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings XXI International Grassland Congress / VIII International Rangeland Congress Effect of Growth Regulators Application on Seed Yield of Festulolium braunii Piotr Goliński Agricultural University of Poznań, Poland A. Rzeźnik Agricultural University of Poznań, Poland Barbara Golińska Agricultural University of Poznań, Poland 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/21/14-1/15 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 ]563　 瞯Grasslands/Rangelands Production Systems——— Seed Science and TechnologyEffect of growth regulators application on seed yield of Festulolium brauniiP . Goliński , A . Rze碧nik and B . GolińskaDepartment o f G rassland Sciences , A gricultural University o f Poznań , Woj ska Polskiego 38/42 , 60‐627 Poznań , Poland E‐mail : p golinsk＠ au .poz nan .p lKey words : festulolium ,seed production ,grow th regulators ,lodgingIntroduction The current problem in the cultivation of Festulolium braunii for seeds , especially in conditions of optimal nitrogenfertilisation , is plant lodging . Among treatment intended to prevent the occurrence of this phenomenon is the application ofgrow th regulators which , in some seed grasses , results in considerable increases of seed yields ( Rolston et al . , １９９７ ) .However , the main issue is the selection of the appropriate preparation . The aim of the performed investigations was to assessthe impact of the application of selected grow th regulators in the seed production of Festulolium braunii .Materials and methods During ２００６‐２００７ , in Brody (５２°２６′ N , １６° １８′ E) an experiment was set up in a plot block‐design withthree replicates ( plot size １ m ( １０ m) to evaluate the effect of different grow th regulators ( １ / control‐without application ; ２ /trinexapac‐etyl : １００ g / ha ( Moddus ２５０ EC ) applied in GS３２ ; ３ / trinexapac‐etyl : ７５ g / ha GS３２ ＋ ７５ g / ha GS４１ ; ４ /trinexapac‐etyl : １５０ g / ha GS４１ ; ５ / etephon : ４８０ g / ha GS３２ ( Cerone ４８０ SL ) ; ６ / chlormequat chloride : ５００ g / ha GS３２( Cycocel ２５０ SL ) on the seed yield and selected biological features of Festulolium braunii cv . Felopa . The experiment wassituated on Albic Luvisols soils ( pHKCl‐５ .８ , Nt‐０ .９％ , P２O５‐１４２ mg / kg , K２O‐１５８ mg / kg , Mg‐７３ mg/ kg ) . In August ２００５seeds were sown in the rate of ４００ seeds/m２ at row spacing of ２５ cm . Fertiliser was applied each year at a rate of : N‐８０ kg / ha ,P２O５‐５０ kg / ha , K２O‐８０ kg / ha . The following parameters were analyzed : plant lodging ( using a ９ point scale‐１‐very stronglodging , ９‐without lodging ) , seed yield ( collecting seeds with a plot Wintersteiger combine harvester from the area of １０ m２ ,drying and cleaning ) , yield structure and seed quality ( according to ISTA ) . Tests of the main effects were performed by F‐tests . Means were separated by the LSD and were declared different at the P＜ ０ .０５ level .Results The application of grow th regulators reduced significantly the plant lodging in comparison with the control plot on whichthe degree of this phenomenon , assessed for the two years of studies , was on average at the level of ５ .２ . The best effect ofprotection against lodging ( ９ .０ ) was achieved in the case of the application of trinexapac‐etyl at the GS４１ phase . Theapplication of the remaining experimental grow th regulators protected against lodging at levels ranging from ６ .３ to ８ .０ . Thegrow th regulators reduced considerably generative shoots length , particularly trinexapac‐etyl applied in GS４１ and GS３２ ＋ GS４１( Table １) . Moreover , this regulator reduced the length of inflorescences by ４ .６‐７ .９％ . By reducing or delaying plant lodging ,the application of grow th regulators in the seed cultivation of Festulolium braunii exerted a positive influence on the number ofseeds in the spikelet and the effectiveness of seed setting . The best effect in this field was observed in the case of the applicationof trinexapac‐etyl at the GS４１ phase . The application of grow th regulators resulted in the increase of seed yields in comparisonwith the control treatment in the range of ６ .４％ to ３１ .０％ . The applied grow th regulators did not have negative influence onthe seed germination capacity .Table 1 E f f ects o f growth regulators application on seed yield and quality o f Festulolium braunii (means ２００６‐２００７ ) .T reatment Shootslength( cm)Earlength( cm)No . ofspikeletper earNo . ofseeds perspikeletSeed setefficiency( ％ )Seedyield( kg / ha)Germinationcapacity( ％ )control １０８ +.７ ２４ ".１ １７ /.０ ４  .２４ ５１ K.５ ５４３ p.７ ７４ 　.２trinexapac‐etyl GS３２ è１０７ +.４ ２３ ".０ １７ /.１ ４  .８８ ５２ K.２ ５７８ p.５ ７５ 　.５trinexapac‐etyl GS３２ ＋ GS４１ 照８７  .７ ２２ ".６ １７ /.６ ４ .５０ ５２ K.１ ６０１ p.５ ７３ 　.２trinexapac‐etyl GS４１ è８５  .４ ２２ ".２ １７ /.８ ４ .８３ ５６ K.７ ７１２ p.０ ８０ 　.０etephon GS３２ 殮１１０ +.１ ２３ ".９ １７ /.７ ４  .１６ ５１ K.７ ５９８ p.７ ７６ 　.３chlormequat chloride GS３２ 枛１０４ +.０ ２４ ".５ １７ /.５ ４  .３７ ５２ K.２ ６１５ p.２ ７９ 　.２LSD０ M.０５ ３ 骀.１４ ０ 趑.７７ ０  .５３ ０ �.３１７ ２ .１４ ８７ B.９５ nsConclusions The experimental grow th regulator trinexapac‐etyl applied in the dose of １５０ g / ha in the grow th stage GS４１ wascharacterized by the best effects when applied on Festulolium braunii cultivated for seds . In comparison with the treatmentwithout grow th regulators application , the use of this preparation increased seed yields of Festulolium braunii by ３１％ . Theobserved effect was the result of protection against lodging and improved seed set efficiency .ReferenceRolston , M .P . , Rowarth , J .S . , Young III , W .C . , Mueller‐Warrant , G .W . , １９９７ . Grass seed crop management . In :Fairey D . T . , H amp ton J . G . ( ed .) Forage seed p roduction . Vol . １ : Temperate species . Walling f ord : CABInternational , １０５‐１２６ .

Effect of Growth Regulators Application on Seed Yield of \u3ci\u3eFestulolium braunii\u3c/i\u3e

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Effect of Growth Regulators Application on Seed Yield of \u3ci\u3eFestulolium braunii\u3c/i\u3e

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