Cortes‐Diaz, E.

Faggi, D. H.

Manzano‐Luna, R.

Martinez‐Hernandez, Pedro A.

Mendoza‐Rodriguez, M.

Zaragoza‐Ramirez, Jose L.

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings XXI International Grassland Congress / VIII International Rangeland Congress Pattern of Above‐Ground Biomass Accumulation in Maize Cultivars Grown for Silage Jose L. Zaragoza‐Ramirez Universidad Autónoma Chapingo, Mexico E. Cortes‐Diaz Universidad Autónoma Chapingo, Mexico Pedro A. Martinez‐Hernandez Universidad Autónoma Chapingo, Mexico R. Manzano‐Luna Universidad Autónoma Chapingo, Mexico M. Mendoza‐Rodriguez Universidad Autónoma Chapingo, Mexico See next page for additional authors 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/21/15-3/30 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. Presenter Information Jose L. Zaragoza‐Ramirez, E. Cortes‐Diaz, Pedro A. Martinez‐Hernandez, R. Manzano‐Luna, M. Mendoza‐Rodriguez, and D. H. Faggi This event is available at UKnowledge: https://uknowledge.uky.edu/igc/21/15-3/30 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅱ 　 瞯 777　 瞯Grasslands/Rangelands Production Systems ——— Forage Quality ,Conservation and UtilizationPattern of above‐ground biomass accumulation in maize cultivars grown for silageJose L . Zaragoza‐Ramirez , E . Cortes‐Diaz , Pedro A . Martinez‐Hernandez , R Manzano‐Luna , M . Mendoza‐Rodriguezand D . H . Faggi . Chapingo , km 38 .5 carr . Mexico‐Texcoco , Mexico , MEXICO 56230 . huexotla2001 ＠ hotmail .comKey words : length of growing cycle , leaf yield , grain yieldIntroduction Maize is the preferred plant species for silage‐making in the Highlands of Mexico , the variable amount anddistribution of rainfall of the region makes farmers choose between short and long growing cycles maize cultivars . The first onesare safer to achieve the stage for silage‐cut but usually at lower total yield than long cultivars ; however , the quality of maizesilage depends on the proportion of leaves and grain within the total yield . The objective of this study was to determine leaf andgrain yields in maize cultivars of short to long growing cycles .Materials and methods The experiment was conducted at the University of Chapingo Experimental Station , １９°１９′N , ９５°３１′ Wand ２ ,２５５ masl . Treatments were １２ maize cultivars ; experimental design was a completely randomized block with fourreplications ; and the experimental unit was a ３５２ m２ plot , with ４４ rows ８０ cm apart . Seeding density was １００ ,０００ seed/ ha ;NPK fertilization was at the rate of １４１‐５１‐５１ ; N was split in three applications ; and sprinkle and flood irrigation were used toprevent crop water stress . Three whole plants were harvested at ８４ , １０１ , １１１ , １１９ , １３０ , １３９ and １５１ day after seeding , andleaf and grain dry weights were determined . Statistical analyses were for each day of sampling .Results and Discussion During the whole season the trend was higher leaf yield per plant as maize cultivars went from short( SGC) to long ( LGC) growing cycle , at １５１ days after seeding LGC cultivars produced up to two times more leaf yield per pantthan SGC . Grain yield per plant was usually not different ( P ＞ ０ .０５ ) among maize cultivars ( Table １ ) , indicating that thedifference found in total yield among maize cultivars of different growing cycle comes from leaf yield and not from grain .Table 1 Leaf and grain weights in dif f erent maize cultivars at dif f erent p lant age .Plantage( days )Growing cycleShort Intermediate Intermediate / long LongCIMMYT１１CIMMYT８３ HVJ ２ HVC１ HVC２ VCH ３ VS ２２ HVR１ HVR２ V１８ V１０７Leaf ( g / plant )８４ ３６ .１d 磯磯 ３６ .７d ３９ .９dc ５３ .１bdac ４９ .０bdac ５１ .５bdac ４４ .２bdc ４５ .１bdc ６６ .４a ６０ .１bac ６２ .２a１０１ ４４ .５b ４６ .２b ５３ .４ba ５９ .２ba ６６ .６ba ５５ .０ba ６２ .７ba ６３ .０ba ７２ .９a ７０ .９a ７５ .７a１１１ ５２ .０a ４４ .２a ５３ .２a ６１ .０a ４８ .４a ４３ .５a ５７ .２a ５６ .０a ７１ .０a ６３ .１a ５２ .０a１１９ ３９ .０b ４２ .２ba ４４ .５ba ５４ .２ba ５０ .９ba ５０ .９ba ５３ .１ba ５６ .６ba ６２ .１a ５６ .７a ６０ .６a１３０ ３３ .８b ４３ .２ba ５０ .９ba ４９ .８ba ４１ .９ba ５４ .１a ５６ .６a ５８ .０a ５８ .６a ５３ .１ba ５３ .６ba１３９ ３５ .９a ４０ .９a ４８ .１a ５２ .５a ４９ .９a ４７ .９a ５０ .５a ６０ .９a ６０ .５a ５４ .０a ４５ .２a１５１ ３４ .２b ５２ .２ba ５２ .２ba ６０ .４ba ４３ .０ba ５１ .７ba ６１ .７ba ７２ .０a ７２ .４a ６９ .６a ７２ .６aGrain ( g / plant )１１１ ３６ .６a ３４ .０a １９ .５a １５ .２ba ２０ .２a ９ .２a １２ .６a ２３ .０ba ２０ .２ba １０ .６ba ０ .０b１１９ ４８ .４a ５３ .６a ３６ .０a ４４ .６a ４６ .７a ３１ .７a １３ .９a ２９ .１a ４２ .０a １３ .１a ２２ .１a１３０ ６８ .０a ６９ .７a ８５ .１a ７６ .４a ３６ .９a ５３ .６a ７９ .６a ７１ .２a ６９ .０a ４２ .０a ３８ .５a１３９ ６２ .９bac ８４ .５bac ９４ .４ba ５２ .０bc ９５ .４a ８２ .７bac ５９ .０bac １３３ .２a ７６ .６bac ５１ .０bc ２２ .６c１５１ ８３ .０a １１３ .２a ９３ .５a １０３ .４a ９６ .０a ６８ .７a １３０ .４a ９５ .０a １５１ .９a ６１ .７a １００ .７a磯磯 Means within rows with at least one letter in common are not different ( P ＞ ０ .０５ )Conclusion Length of the growing cycle in maize cultivars might bring differences in leaf yield per plant with no differences ingrain yield per plant .

Pattern of Above‐Ground Biomass Accumulation in Maize Cultivars Grown for Silage

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Pattern of Above‐Ground Biomass Accumulation in Maize Cultivars Grown for Silage

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