Ear‐Fill Effects on Yield and Quality of Silage Corn

Coors, J. G.; Albrecht, Kenneth A.; Bures, Edward J.

doi:10.2135/cropsci1997.0011183x003700010043x

Cited by 59 publications

(62 citation statements)

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“…Therefore, stover quality must be determined at harvest time to accurately identify high ADF acid detergent fiber, NDFD neutral detergent fiber digestibility quality genotypes. The lack of correlations with early developmental stages, primarily before grain filling, could be explained by the presence of different efficiencies of remobilizing sugars to the ear in different genotypes [2,9], as well as the ability of different tissue types within the same genotype to have different efficiencies of remobilizing sugars to the ear and altered physiology throughout development [4,20,21,28]. In addition to a lack of correlation between early plant part digestibility and whole plant digestibility at R6, there is also less variation for this trait at these early developmental stages.…”

Section: Discussionmentioning

confidence: 99%

Cell Wall Composition and Ruminant Digestibility of Various Maize Tissues Across Development

2010

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Maize stover, including stalks, leaves, and cobs, has potential utility as a cellulosic biofeedstock. Understanding how total stover ethanol potential is affected by the proportion and quality of major plant components would facilitate the genetic improvement of stover quality and inform decisions regarding which plant parts should be targeted for harvesting. Our objectives were to determine how the proportion and composition of plant components affected ethanol potential and whether there are early season predictors of stover quality at maturity. Twentythree hybrids were evaluated including 20 from a factorial mating design between five silage inbred lines and four commercial inbreds and a brown-midrib3, a Leafy1, and a commercial grain hybrid checks. Plants were harvested and dissected into component parts at developmental stages vegetative 3, vegetative 12, reproductive 3, and reproductive 6 (R6). Tissues were evaluated for acid detergent fiber (ADF), neutral detergent fiber (NDF), and NDF digestibility (NDFD). Stalk was the largest fraction of whole plant dry matter (46.2%) and had the lowest NDFD (3,750 g/kg) at R6. No relationship was found between stalk ADF at early developmental stages and whole plant ADF at R6, suggesting that quality at early developmental stages is not indicative of quality at physiological maturity. Differences were observed among hybrids for ADF and NDF for most plant parts evaluated. Hybrid-bydevelopmental stage and hybrid-by-plant part interactions were statistically significant. This indicates that there is minimal opportunity to identify superior hybrids for biofuel production based on the proportion of total biomass represented by a plant part and its quality at early developmental stages. Maximum conversion efficiency is attained when leaves are harvested compared to other tissue types at physiological maturity.

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Section: Discussionmentioning

confidence: 99%

Cell Wall Composition and Ruminant Digestibility of Various Maize Tissues Across Development

2010

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“…At Brooks minor variation among varieties occurred with later harvests, but the major trend was that ADF was larger for Amaizing Graze than the other varieties after the first harvest. Coors et al (1997) observed that as grain content of corn increased, in vitro true digestibility increased slightly and NDF concentration decreased. A slightly higher grain content may have improved nutritive value for some varieties over others and may have played a role in resistance to weathering.…”

Section: Nutritive Value and Loss Of Nutritive Valuementioning

confidence: 96%

Winter weathering effects on corn grown for grazing in a short-season area

Baron¹,

Najda²,

McCartney³

et al. 2003

Can. J. Plant Sci.

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G. W. 2003. Winter weathering effects on corn grown for grazing in a short-season area. Can. J. Plant Sci. 83: 333-341. Winter grazing can reduce over-winter feeding costs of beef cows and, recently, the selection and marketing of corn (Zea mays L.) varieties for grazing has increased the interest of Alberta beef producers. The objective of this study was to compare grazing corn varieties with early conventional corn hybrids for winter grazing potential. Five corn varieties (one grazing, one short-stature and three conventional types) were compared for whole-plant yield and forage quality at Lacombe and Brooks, AB, at four harvest times (two in September, one in December and one in January), in each of 2 yr. Forage quality analyses were in vitro digestible organic matter (IVDOM), neutral (NDF) and acid detergent fiber (ADF) and crude protein concentration. Averaged over varieties and years, yield decreased (P ≤ 0.05) by 13% between September and January at Lacombe, and by 39 and 16% at Brooks in 1999 and 2000, respectively. At Brooks, yield losses from September to January, averaged over years were 38 to 18% for a grazing and a conventional variety, respectively. At Lacombe, IVDOM concentration declined (P ≤ 0.05) by 6.3 and 3.6% between September and January during 1999 and 2000, respectively; NDF concentration increased (P ≤ 0.05) by 10% over the same interval for both years. At Lacombe there were no differences among varieties for nutritive value by January harvests. Trends for reduced forage quality with harvest were not clear at Brooks but the grazing-type variety had higher (P ≤ 0.05) NDF and ADF concentrations than the other varieties after the first harvest. In general, projected energy and crude protein concentrations of corn during winter exceeded minimum requirements and were adequate, respectively, for non-lactating, pregnant beef cows. Grazing and short stature corn varieties were not superior to early conventional corn genotypes for winter grazing potential. Thus, choice of variety for winter grazing should be made on the basis of cost of production and early maturity. ) pour la paissance a éveillé l'intérêt des producteurs de boeuf de l'Alberta. L'étude devait comparer le potentiel de paissance hivernal de ces variétés à celui d'hybrides ordinaires. Les auteurs ont comparé le rendement global de la plante et la qualité du fourrage de cinq variétés (une destinée à la paissance, une naine et trois ordinaires) à Lacombe et à Brooks (Alberta) pendant deux ans, à quatre périodes de récolte (deux en septembre, une en décembre et la dernière en janvier). Pour déterminer la qualité du fourrage, ils ont dosé la concentration de matière organique digestible in vitro (IVDOM), la quantité de fibres au détergent neutre (NDF) et acide (ADF) et la teneur en protéines. Une fois la moyenne pour les variétés et les deux années établie, on constate que le rendement a diminué (P ≤ 0,05) de 13 % entre septembre et janvier à Lacombe, contre 39 % et 16 % en 1999 et 2000, respectivement, à Brooks. Après calcul de la moy...

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“…Therefore, stover quality must be determined at harvest time to accurately identify high quality genotypes. The lack of correlations with early developmental stages, primarily before grain filling, could be explained by the presence of different efficiencies of remobilizing sugars to the ear in different genotypes [2,9], as well as the ability of different tissue types within the same genotype to have different efficiencies of remobilizing sugars to the ear and altered physiology throughout development [4,20,21,28].…”

Section: Discussionmentioning

confidence: 99%

Erratum to: Cell Wall Composition and Ruminant Digestibility of Various Maize Tissues Across Development

2010

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Maize stover, including stalks, leaves, and cobs, has potential utility as a cellulosic biofeedstock. Understanding how total stover ethanol potential is affected by the proportion and quality of major plant components would facilitate the genetic improvement of stover quality and inform decisions regarding which plant parts should be targeted for harvesting. Our objectives were to determine how the proportion and composition of plant components affected ethanol potential and whether there are early season predictors of stover quality at maturity. Twentythree hybrids were evaluated including 20 from a factorial mating design between five silage inbred lines and four commercial inbreds and a brown-midrib3, a Leafy1, and a commercial grain hybrid checks. Plants were harvested and dissected into component parts at developmental stages vegetative 3, vegetative 12, reproductive 3, and reproductive 6 (R6). Tissues were evaluated for acid detergent fiber (ADF), neutral detergent fiber (NDF), and NDF digestibility (NDFD). Stalk was the largest fraction of whole plant dry matter (46.2%) and had the lowest NDFD (375.0 g/kg) at R6. No relationship was found between stalk ADF at early developmental stages and whole plant ADF at R6, suggesting that quality at early developmental stages is not indicative of quality at physiological maturity. Differences were observed among hybrids for ADF and NDF for most plant parts evaluated. Hybrid-bydevelopmental stage and hybrid-by-plant part interactions were statistically significant. This indicates that there is minimal opportunity to identify superior hybrids for biofuel production based on the proportion of total biomass represented by a plant part and its quality at early developmental stages. Maximum conversion efficiency is attained when leaves are harvested compared to other tissue types at physiological maturity.

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Ear‐Fill Effects on Yield and Quality of Silage Corn

Cited by 59 publications

References 0 publications

Cell Wall Composition and Ruminant Digestibility of Various Maize Tissues Across Development

Cell Wall Composition and Ruminant Digestibility of Various Maize Tissues Across Development

Winter weathering effects on corn grown for grazing in a short-season area

Erratum to: Cell Wall Composition and Ruminant Digestibility of Various Maize Tissues Across Development

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