Bueno, M. S.

de Lucena, M. A. C.

Paulino, Valdinei T.

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings XXI International Grassland Congress / VIII International Rangeland Congress Germination of Seeds of Pennisetum hybridum cv. Paraiso Affected by Different Harvest Dates, Storage Periods and Sowing Depths Valdinei T. Paulino Instituto de Zootecnia, Brazil M. A. C. de Lucena Instituto de Zootecnia, Brazil M. S. Bueno Instituto de Zootecnia, Brazil 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/21/14-2/24 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. 瞯 ]622　 瞯 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅱ 　Grasslands/Rangelands Production Systems——— Seed Science and TechnologyGermination of seeds of Pennisetum hybridum cv . Paraiso affected by different harvest dates ,storage periods and sowing depthsV . T . Paulino1 , M . A . C . de Lucena1 , M . S . Bueno1Instituto de Zootecnia , E‐mail : paulino＠ iz .sp .govbr 13 .160‐000 , Nova Odessa , Sao Paulo , Braz il .Key words : germination , Pennisetum hybridum , harvest , storage , seedsIntroduction Seeds are important agricultural material , and determine the productive potentials of a plant . Paradise elephantgrass , result of the cross of millet ( Pennisetum glaucum ( L .) R .Br ) with elephant grass ( Pennisetum purpureum Schum ) ,produces large amounts of high quality forage . This hybrid is established from seeds , that is also one of the limitations ofcommon elephant grass . The objective of this study was to evaluate the effect of seed harvest dates , storage methods and thesowing depth on the germination behavior of Pennisetum hybridum cv . Paraiso .Material and methods The treatments studied were : different harvest dates (３０ , ４５ , ６０ and ９０ days after the early flowering ) ,storage periods (５０ , ７０ , ８５ and １００ days) and sowing depths １ , ２ and ４ cm . In experiment １ , the experimental design wasentirely randomized , in a factorial scheme ４ x ２ ( times of harvest x storage) . In experiment ２ , the design was randomizedblocks , in a factorial arrangement ４ x ３ ( harvest times x sowing depth) .Results The germination of the seeds without storage was highest for the later harvest dates . With storage , the germinationpercentages were lower when harvested at the end of March or middle of May , however the differences between storing or notstoring , were not statistically significant ( Table １ ) . The Paraiso seeds appeared to have no type of dormancy or necessity tostore seeds to reach the physiological maturation . However , the cultural values ( Germination ( ％ ) x Purity ( ％ ) /１００) differedsignificantly among the harvest dates with higher values for seeds harvested later and lower for seeds harvested earlier (３０ daysafter early flowering ) due to lower germination percentages . The seedling emergence , in the soil , was higher for later harvestdates ( ２６th April and １６th May ) approximately ６０ and ９０ days after the early bloom , compared to seeds harvested earlier .Sowing at １ cm deep was superior to deeper sowings of ２ or ４ cm .Table 1 Germination , pureness and cultural v alue ( in box ) , and emergency ( ％ ) o f Paraiso grass ( Pennisetum hybridum )cultiv ated in sandy soil , due to harvest times and di f f erent sow ing dep ths .Harvest date/storage daysGermination ％Initial 　 AfterStoragePureness％Cultural valuesBefore 　 　 AfterStorageSowing Depths ( cm)　 １ 　 　 　 　 ２ 　 　 　 ４ 　 　 　 AverageMarch ２８th / １００ days ３３ ,８ dA ２６ ,２ cA ６３ a ２１ dA １６ cA ２７ M１７ 缮１５ E１９ ,７CApril １２th / ８５ days ４８ ,９ cA ４８ ,３ bA ６６ a ３２ cA ３２ bA ４２ M３０ 缮２８ E３３ BApril ２６th / ７０ days ６７ ,０ bA ６７ ,７ aA ６７ a ４５ bA ４５ aA ４４ M４２ 缮３８ E４１ AMay １６th / ５０ days ７５ ,２ aA ６５ ,２ aA ６８ a ５２ aA ４４ aA ５４ M４４ 缮４３ E４７ AMeans followed by lower case letters in the column or same upper case letters in the row do not differ based on Tukey摧s Test ( ５％ ) .Conclusions The Paraiso grass seeds germinated well af ter harvest and do not show any type of dormancy ; the highestgermination values and cultural values were obtained for seeds harvested between ７５ and ９０ days after the initial floweringstage . Seed storage in a cold chamber ( about １７o C ) for a period up to １００ days does not result in significant reduction ingermination . The sowing depth of １ cm resulted in higher values of seedlings emergence than ２ or ４ cm .ReferencesVieira , A R . , Silva , E . M . , Rodrigues , J .R .M . , ２００６ . Produ毕本o de sementes . Informe A g ropecuário , v . ２７ , n . ２３２‐maio /jun . ３３‐３９ .Vilela , H . , Nogueira , A .C . , Tsuako , A .T . , ２００４ . Melhoramento genético do capim elefante híbrido BGL (Pennisetumhybridum ) híbrido hexaplóide . Zootec ,Brasí lia‐DF .

Germination of Seeds of \u3ci\u3ePennisetum hybridum\u3c/i\u3e cv. Paraiso Affected by Different Harvest Dates, Storage Periods and Sowing Depths

https://uknowledge.uky.edu/cgi/viewcontent.cgi?article=3678&amp;context=igc

Germination of Seeds of \u3ci\u3ePennisetum hybridum\u3c/i\u3e cv. Paraiso Affected by Different Harvest Dates, Storage Periods and Sowing Depths

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