Effect of Dietary Neutral Detergent Fiber Concentration and Forage Source on Performance of Lactating Cows

Ruiz, Teodoro M.; Bernal, Edgar Iván Sánchez; Staples, C.R.; Sollenberger, Lynn E.; Gallaher, R. N.

doi:10.3168/jds.s0022-0302(95)76639-5

Cited by 46 publications

(29 citation statements)

References 11 publications

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“…Data in Table 1 indicate that the wall cell fractions, aNDFom and ADFom, were lower for the BMR hybrid but the Lignin(sa) fraction was higher (+2%). Other studies have observed no difference in ADF and NDF concentrations between conventional and BMR-sorghum [9] [15]. It must be said, that the BMR sorghum was not compare to its correspondent normal one (the same genotype without the mutation) and so, the effect of the specific mutation is confounded with hybrid.GE content was not significant different between sorghum types.…”

Section: Forage Characteristics and In Vivo Digestibility Of Sorghum mentioning

confidence: 94%

Comparison of Brown Midrib Sorghum with Conventional Sorghum Forage for Grazing Dairy Cows

Astigarraga¹,

Bianco²,

Mello³

et al. 2014

AJPS

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A brown midrib (BMR) sorghum pasture was compared with normal sorghum for its effects on performance of Holstein cows in midlactation in terms of milk production and composition at grazing over three periods (Period 1: 20/01 to 31/01, Period 2: 17/02 to 28/02, Period 3: 19/03 to 30/03). Forty Holstein cows were grouped according to pre-experimental milk production (22.4 ± 4.2 kg/d milk), live weight (530 ± 25 kg) and lactation stage (127 ± 63 days) and assigned randomly to one of the two experimental pasture. Pasture was assigned on equal basis at an allowance 25 kg DM/cow/day (above 10 cm), assuming a 65% forage utilization and cows received 4 kg of concentrate per day. Simultaneously, both pastures were evaluated with sheep, to analyze digestibility at every grazing period. The BMR sorghum supported higher FCM than normal sorghum (18.5 vs. 17.8 l/day, P < 0.05). Additionally, production of milk components was greater (+52 g/day/cow and +36 g/day/cow for fat and protein respectively, P < 0.05), with fewer intake of concentrate (−0.4 kg/day/cow, P < 0.05) when compared with cows grazing normal sorghum. Those results are in accordance with greater (P < 0.05) total digestive tract DM, OM and NDF in vivo digestibilities for BMR sorghum (65.0, 67.1, 65.9 respectively) than for normal sorghum (60.3, 62.0, 61.3 respectively). The increased digestibility of BMR sorghum must be associated with the compositional differences on fiber which allowed a higher cell wall digestion. Results of this study indicate that the BMR sorghum hybrid outperformed the normal sorghum hybrid resulting in a higher performance per cow with lower concentrate consumption compared with normal sorghum.

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Section: Forage Characteristics and In Vivo Digestibility Of Sorghum mentioning

confidence: 94%

Comparison of Brown Midrib Sorghum with Conventional Sorghum Forage for Grazing Dairy Cows

Astigarraga¹,

Bianco²,

Mello³

et al. 2014

AJPS

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“…Similarly, Thorstesson et al (1992) observed a greater concentration of NDF for conventional sorghum when compared with its bmr-6 or bmr-18 counterparts. However, other studies have observed no difference in ADF and NDF concentrations between conventional and bmr-6 sorghum (Ruiz et al, 1995;Aydin et al, 1999). A review of bmr research by Cherney et al (1991) indicated considerable variation exists in fiber composition among conventional and bmr sorghum hybrids.…”

Section: Silage and Dietary Compositionmentioning

confidence: 99%

Comparison of Brown Midrib-6 and -18 Forage Sorghum with Conventional Sorghum and Corn Silage in Diets of Lactating Dairy Cows

Oliver

Grant

Pedersen

et al. 2004

Journal of Dairy Science

128

143

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Total mixed rations containing conventional forage sorghum, brown midrib (bmr)-6 forage sorghum, bmr-18 forage sorghum, or corn silage were fed to Holstein dairy cows to determine the effect on lactation, ruminal fermentation, and total tract nutrient digestion. Sixteen multiparous cows (4 ruminally fistulated; 124 d in milk) were assigned to 1 of 4 diets in a replicated Latin square design with 4-wk periods (21-d adaptation and 7 d of collection). Diets consisted of 40% test silage, 10% alfalfa silage, and 50% concentrate mix (dry basis). Acid detergent lignin concentration was reduced by 21 and 13%, respectively, for the bmr-6 and bmr-18 sorghum silages when compared with the conventional sorghum. Dry matter intake was not affected by diet. Production of 4% fat-corrected milk was greatest for cows fed bmr-6 (33.7 kg/d) and corn silage (33.3 kg/d), was least for cows fed the conventional sorghum (29.1 kg/d), and was intermediate for cows fed the bmr-18 sorghum (31.2 kg/ d), which did not differ from any other diet. Total tract neutral detergent fiber (NDF) digestibility was greatest for the bmr-6 sorghum (54.4%) and corn silage (54.1%) diets and was lower for the conventional (40.8%) and bmr-18 sorghum (47.9%) diets. In situ extent of NDF digestion was greatest for the bmr-6 sorghum (76.4%) and corn silage (79.0%) diets, least for the conventional sorghum diet (70.4%), and intermediate for the bmr-18 sorghum silage diet (73.1%), which was not different from the other diets. Results of this study indicate that the bmr-6 sorghum hybrid outperformed the conventional sorghum hybrid; the bmr-18 sorghum was intermediate between conventional and bmr-6 in most cases. Additionally, the bmr-6 hybrid resulted in lactational

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“…When forage alone is fed to sheep or cattle, NDF is negatively correlated with dry matter intake (Osbourn et al, 1974; Reid et al, 1988). When forage is fed together with concentrates, NDF is negatively correlated with dry matter intake if the rumen capacity of the animal is not reached (Conrad et al, 1964; Mertens, 1987; Ruiz et al, 1995). Thus, it is desirable to reduce NDF of forages.…”

mentioning

confidence: 99%

Responses to Divergent Selection for Fiber Concentration at Two Disease Potentials in Smooth Bromegrass

2001

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Neutral detergent fiber (NDF) concentration is related to intake potential of forages but might also be related to plant reaction to pathogens. Three smooth bromegrass (Bromus inermis Leyss.) populations from these cycles of uniparental mass selection for low NDF, one cycle of biparental mass selection for high NDF, and the base population were evaluated at high and low disease potentials at three locations for 2 yr and three harvests each year. High disease severity, measured as proportion of foliage diseased, was associated with high NDF and high lignin concentration (on a dry‐matter basis and a cell‐wall basis). Nevertheless, disease potentials did not affect the relative performance of selection cycles on any traits measured. On average, NDF was reduced 3.5 g kg−1 DM per cycle (P < 0.001) by selection for low NDF, and increased 11.1 g kg−1 DM in one cycle (P < 0.001) by selection for high NDF. For the spring harvest, the response in NDF could partially be attributed to a change in heading index. A positive correlated response in acid detergent lignin was found in the spring (P < 0.001) while a negative correlated response in cell wall lignin was detected in the summer and fall (P < 0.001). Selection for NDF modified the composition of NDF, as cell wall hemicellulose changed in the opposite direction of NDF. Lower dry matter yield per plant appeared to be associated with lower NDF and higher inbreeding. Selection for low NDF, accompanied by slight selection pressure on disease resistance, resulted in a reduction of NDF without an increase in disease susceptibility.

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Effect of Dietary Neutral Detergent Fiber Concentration and Forage Source on Performance of Lactating Cows

Cited by 46 publications

References 11 publications

Comparison of Brown Midrib Sorghum with Conventional Sorghum Forage for Grazing Dairy Cows

Comparison of Brown Midrib Sorghum with Conventional Sorghum Forage for Grazing Dairy Cows

Comparison of Brown Midrib-6 and -18 Forage Sorghum with Conventional Sorghum and Corn Silage in Diets of Lactating Dairy Cows

Responses to Divergent Selection for Fiber Concentration at Two Disease Potentials in Smooth Bromegrass

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