Effects of Brown Midrib 3 Mutation in Corn Silage on Dry Matter Intake and Productivity of High Yielding Dairy Cows

Oba, M.; Allen, Michael S.

doi:10.3168/jds.s0022-0302(99)75217-3

Cited by 142 publications

(136 citation statements)

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“…Retention of digesta in the rumen functions to supply a more consistent flow of nutrients to the small intestine, but physical fill of the gastrointestinal tract can limit feed intake when highforage diets are fed (Holt et al 2013a). Oba and Allen (1999) stated that ruminal fill was more limiting to intake for higher-yielding cows and thus increasing NDF digestibility of forage by feeding the BMRT might increase DMI to a greater extent in rapidly growing beef steers. Thus, we expected increased DMI for steers offered the BMRT compared with those fed the CCST, and the absence of an effect of feeding the BMRT on DMI could be attributed to an increased proportion of propionate for steers fed the BMRT compared with those fed the CCST, which will be discussed in more detail later in this paper in the ruminal fermentation profiles.…”

Section: Resultsmentioning

confidence: 99%

“…The rumen-filling effect of diets is influenced most by concentration, digestibility, and fragility of forage neutral detergent fiber (NDF) (Allen and Bradford 2011). Feeding forages with enhanced digestibility of NDF improved DMI and milk yield in dairy cows (Oba and Allen 1999). Corn silage with the BMR mutation has been well documented to have greater fiber digestibility than conventional corn silage (CCS) and will likely increase DMI and milk yield compared with cows fed CCS (Eastridge 1999;Gencoglu et al 2008).…”

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Feeding a brown midrib corn silage-based diet to growing beef steers improves growth performance and economic returns

et al. 2015

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. 2015. Feeding a brown midrib corn silage-based diet to growing beef steers improves growth performance and economic returns. Can. J. Anim. Sci. 95: 625Á631. A feedlot experiment was performed to determine growth performance, ruminal fermentation characteristics, and economic returns for growing beef steers when fed a brown midrib corn silage-based total mixed ration (BMRT) compared with a conventional corn silagebased total mixed ration (CCST). Twenty-four Angus crossbred steers (initial body weight0258923.2 kg) in individual pens were used in a completely randomized design (n 012). Intake of dry matter was not different between the treatments. Steers fed the BMRT tended to have greater average daily gain (1.54 vs. 1.42 kg d(1 ; P00.09) and gain-to-feed ratio (0.165 vs. 0.146; P00.07) compared with those fed the CCST. Feeding the BMRT increased total volatile fatty acid (VFA) concentration (P00.01) compared with the CCST, while it decreased molar proportion of acetate (PB0.01), and increased propionate proportion (P00.01), resulting in decreased acetate-to-propionate ratio compared with the CCST (PB0.01). Steers fed the BMRT increased feed margin (P00.05) and net return (P 00.02) compared with those fed the CCST throughout the trial. Overall results of this study indicate that feeding the BMRT to growing beef steers enhanced ruminal fermentation and beneficially shifted VFA profiles, which contributed to improved growth and economic performance of steers. J. Anim. Sci. 95: 625Á631. Une expe´rience en parc d'engraissement a e´te´effectue´e pour de´terminer la performance de croissance, les caracte´ristiques de fermentation ruminale et les rendements e´conomiques chez les baeufs de boucherie en croissance lorsque nourris une ration totale mixte a`base de maı¨s a`nervure brune (BMRT Á « brown midrib corn silage-based total mixed ration ») par rapport a`ceux nourris d'une ration totale mixte traditionnelle a`base d'ensilage de maı¨s (CCST Á « conventional corn silage-based total mixed ration »). Vingt-quatre bouvillons Angus croise´s (poids corporel initial 02589 23,2 kg) dans des enclos individuels ont e´te´utilise´s dans un design comple`tement ale´atoire (n 012). L'ingestion des matie`res se`ches (DM Á « dry matter ») ne diffe´rait pas entre les traitements. Les bouvillons alimente´s a`la die`te BMRT tendaient vers de plus grands gains moyens quotidiens (ADG Á « average daily gain »; 1,54 c. 1,42 kg jour (1 ; P00,09) et indices de consommation (0,165 c. 0,146; P00,07) par rapport a`ceux ayant rec¸u la die`te CCST. L'alimentation a`la die`te BMRT a augmente´la concentration d'acides gras volatils totaux (VFA Á « volatile fatty acid ») (P00,01) par rapport a`la die`te CCST, tandis qu'elle a diminue´la proportion molaire d'ace´tate (P B0,01) et a augmente´la proportion de propionate (P00,01), ayant comme re´sultat une diminution du ratio ace´tate a`propionate par rapport a`la die`te CCST (PB0,01). Les bouvillons nourris a`la die`te BMRT ont vu une augmentation de leur marge d'aliments (P 00,05) et de leurs retours...

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Feeding a brown midrib corn silage-based diet to growing beef steers improves growth performance and economic returns

et al. 2015

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“…As a consequence of improved fiber digestibility, the amount of available energy may be greater for cows consuming bm3 corn silage compared with those consuming conventional hybrids. However, the extent of energy utilization may be limited because cows fed bm3 silage usually consume more feed (Oba and Allen, 1999;Tine et al, 2001), thus reducing total diet digestibility (Weiss and Wyatt, 2006). Several studies have reported that cows consumed more feed when fed bm3 corn silage compared with an isogenic control (Oba and Allen, 1999;Greenfield et al, 2001;Tine et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Nitrogen Utilization and the Effects of Monensin in Dairy Cows Fed Brown Midrib Corn Silage

Gehman

Kononoff

Mullins

et al. 2008

Journal of Dairy Science

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Twenty midlactation Holstein cows (4 ruminally fistulated) averaging 101 ± 34 d in milk and weighing 674 ± 77 kg were used to compare rations with brown midrib corn silage (bm3) to rations with dual-purpose control silage (DP) on N utilization and milk production. The effect of monensin in these rations was also examined. Animals were assigned to one of five 4 × 4 Latin squares with treatments arranged in a 2 × 2 factorial. Cows were fed 1 of 4 treatments during each of the four 28-d periods. Treatments were 1) 0 mg/d monensin and bm3 corn silage, 2) 0 mg/d monensin and DP corn silage, 3) 300 mg/d monensin and bm3 corn silage, and 4) 300 mg/d monensin and DP corn silage. In vitro 30-h neutral detergent fiber (NDF) digestibility was greater for bm3 corn silage (61.0 vs. 49.1 ± 0.62). Dry matter intake (DMI) tended to be greater for cows consuming bm3 corn silage (21.3 vs. 20.2 kg/d). Neither hybrid nor monensin affected milk production, fat, or protein (37.7 kg, 3.60%, or 3.04%). Monensin tended to increase rumen pH (5.89 vs. 5.79 ± 0.07) compared with the control treatment. In addition, bm3 corn silage resulted in a significant decrease in rumen pH (5.72 vs. 5.98 ± 0.07). Supplementing monensin had no effect on molar proportions of acetate, propionate, or butyrate. In contrast, an increase was observed in branched-chain volatile fatty acids. No treatment interactions were observed for rumen pH or molar proportion of propionate but monensin decreased the molar proportion of acetate and increased the molar proportion of butyrate when cattle consumed bm3 silage. Dry matter, N, and acid detergent fiber digestibility were lower for the bm3 ration, whereas NDF digestibility was not different between treatments. There was no effect of hybrid on Corresponding author: pkononoff2@unl.edu 288 microbial protein synthesis (1,140 g/d) as estimated by urinary concentration of purine derivatives. Cows consuming bm3 excreted more fecal N than cows consuming DP (38.2 vs. 34.4% N intake); however, based on spot sampling, estimated urinary and manure N were not different between treatments (35.8 and 71.9% N intake). Monensin had no effect on DMI, digestibility of any nutrients, or N metabolism, and there were no hybrid by monensin interactions. Rations including bm3 corn silage tended to increase DMI but did not affect production. The reduction in the digestibility of some nutrients when cows consumed bm3 may have been caused by increased DMI and possible increased digestion in the lower gut. This increase in DMI appeared to also have negatively affected N digestibility but not NDF digestibility. This resulted in a greater amount of N excreted in feces but did not affect total mass of manure N.

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“…In addition to the harvest time and morphological fraction, the feeding value and digestibility of maize stover or maize silage were significantly affected by the variety factor Ettle and Schwarz, 2003;Tang et al, 2008). The digestibility of brown midrib varieties could be improved by their lower lignin content (Oba and Allen, 1999;Tjardes et al, 2000). observed a significant varietal difference in grain and stover yield, and in situ dry matter (DM) degradability based on their observed eight maize varieties.…”

Section: Introductionmentioning

confidence: 93%

Morphological fractions and <i>in vitro</i> fermentation characteristics of five endosperm types maize stover harvested at two maturity stages

Tang¹,

Tan²,

Tayo³

et al. 2009

J. Anim. Feed Sci.

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This study was conducted to estimate the effect of maize endosperm type, e.g., waxy, conventional, fodder, sweet, and high oil, and maturity stage on chemical composition and in vitro fermentation characteristics of morphological fractions. Whole maize stover was separated into four fractions, including leaf blade, leaf sheath, stem and husk. The proportion of leaf blade, leaf sheath and husk, and crude protein (CP) and phosphorus (P) contents decreased, whereas the proportion of stem and fibre content increased with the increasing of maturity stage. High oil, sweet, fodder and conventional had the highest proportion in leaf blade, leaf sheath, stem and husk, respectively. Leaf blade had the highest CP and P contents and husk had the highest neutral detergent fibre content. Conventional had the highest (P<0.05) acid detergent fibre content but the lowest (P<0.05) CP content than the others. Fodder and high oil had the highest P and organic matter (OM) content.Journal of Animal and Feed Sciences, 18, 2009, 582- In vitro gas production parameters of b, a+b, in vitro OM disappearance (IVOMD), and concentration of total volatile fatty acid (TVFA) decreased (P<0.05) with the increase of maturity. Maize stover parts from waxy variety had the highest values of b, c and a+b, whereas the morphological fractions from conventional variety had the highest IVOMD. The morphological fractions differed in c value and potential gas production in the following order: husk > leaf sheath > stem > leaf blade. The highest and lowest values of IVOMD were observed in husk and stem, respectively. The highest TVFA concentration, molar proportion of acetate and propionate were noted in high oil, waxy and sweet, respectively. The result indicated that the nutritive value of maize stover could be improved through the selection of endosperm type and appropriate maturity stage.

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Effects of Brown Midrib 3 Mutation in Corn Silage on Dry Matter Intake and Productivity of High Yielding Dairy Cows

Cited by 142 publications

References 20 publications

Feeding a brown midrib corn silage-based diet to growing beef steers improves growth performance and economic returns

Feeding a brown midrib corn silage-based diet to growing beef steers improves growth performance and economic returns

Evaluation of Nitrogen Utilization and the Effects of Monensin in Dairy Cows Fed Brown Midrib Corn Silage

Morphological fractions and <i>in vitro</i> fermentation characteristics of five endosperm types maize stover harvested at two maturity stages

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