Fontaneli, Renato S.

Fontaneli, Rob S.

Orth, R.

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings XXI International Grassland Congress / VIII International Rangeland Congress Yield and Nutritive Value of Warm‐Season Grasses Renato S. Fontaneli EMBRAPA, Brazil Rob S. Fontaneli Universidade de Passo Fundo, Brazil R. Orth Universidade de Passo Fundo, 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/21/15-1/28 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 675　 瞯Grasslands/Rangelands Production Systems ——— Forage Quality ,Conservation and UtilizationYield and nutritive value of warm‐season grassesR .S . Fontaneli1 , Rob . S . Fontaneli2 , R . Orth2 　1 National Wheat Research Center , Braz ilian Agricultural Research Cor poration ( Embrapa Trigo) and UPF PO Box 451 ,99001‐970 Passo Fundo , RS , Braz il . E‐mail : renato f ＠ cnpt .embrapa .br , 2 Universidade de Passo Fundo/ CEPA‐FAMV‐UPF , 99001‐970 Passo Fundo , RS , Braz ilKey words : sudangrass ,pearl millet ,teosinte ,FDN ,CPIntroduction In the Rio Grande do Sul state , south Brazil , beef cattle feed is based on natural pasture compound by low nutritivevalue grasses from late summer to winter . This work aims to evaluate forage distribution and nutritive value of warm‐seasongrasses seeded during summer .Material and methods The trial was conducted at Agronomy research station in Passo Fundo , Brazil . A split plot trial in arandomized completely block design replicated three times . In the main plots were evaluated three seedings ( ２０ January , ２４February , and ２３ March ) . In subplots genotypes of sorghum BRS ８００ , AG ２５０１ , and Common ( Sorghum bicolor ( L .)Moench .) , Common pearl millet ( Pennisetum americanum ( L .) Leeke , and Common teosinte ( Zea mays subsp . mexicana( Schrad .) H .H . Iltis) . The plots were composed by seven rows ０ .３ m apart and ５ .０ m long . The fertilizer applied was ３００kg / ha of ５‐２５‐２５ ( N‐P２０５‐K２０ ) plus ３０ kg N/ ha ( urea) at tillering and after each to three forage harvest . The plants with ６０‐cm height average were clipped to a １５ .０‐cm stubble height . Nutritive value analized using near infrared spectroscopy ( NIRS) .Results There were no seeding date and genotype interaction effect . January and February seeding date yielded ６ .０ t DM/ hawith good nutritive value ( Table １ ) . Sorghum genotypes yielded more than common sudangrass and teosinte .Table 1 Seeding date and genoty pe e f f ect on DM yield and nutritive value o f summer grasses .Seeding date DM( t / ha)Tillers( m) Blade ( ％ )CP( ％ )ADF ( ％ ) NDF ( ％ )Leaf Stem Leaf StemNDT( ％ )２０ Jan . ６ .１a ６９a ４１c １６ .０ c ３７ ４７ ７０ ７７ ６０２４ Feb . ６ .０a ６９ b ６０b １７ .８ b ４０ ４８ ６３ ７４ ５７２３ Mar . １ .０ b ６７a １００a １９ .０ a ３６ ‐ ６５ ‐ ６４GenotypeAG ２５０１ ６ .８ a ５０ c ５６ b １５ .０ c ４０ ４９ ６８ ７４ ７４BRS ８００ ５ .９ab ５８ bc ７２ a １７ .０ b ４１ ４７ ６６ ７２ ７２Pearl millet ４ .０bc ７２ ab ５２ b ２２ .０ a ３２ ４８ ６２ ８０ ８０Sudangrass ２ .８ c ７１ ab ７８ a １６ .５ b ３６ ４８ ６８ ７７ ７７Teosinte ２ .７ c ８９ a ７８ a １７ .２ b ３８ ４４ ６２ ７４ ７４Values within a column followed by the same letter are not different ( P ＞ ０ .０５ ) by Duncan .Conclusions Sorghum hybrids are more productive than teosinte and common sudangrass . Forage nutritive value are similar toannual grasses during spring . It is possible have a good forage yield seeding to February in Planalto region of Rio Grande do Sulstate , Brazil .

Yield and Nutritive Value of Warm‐Season Grasses

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Yield and Nutritive Value of Warm‐Season Grasses

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