scholarly journals The effects of starch and rapidly degradable dry matter from concentrate on ruminal digestion in dairy cows fed corn silage-based diets with fixed forage proportion

2011 ◽  
Vol 94 (5) ◽  
pp. 2440-2454 ◽  
Author(s):  
C. Lechartier ◽  
J.-L. Peyraud
Keyword(s):  
Dairy Cows ◽  
Dry Matter ◽  
Corn Silage ◽  
Ruminal Digestion

EFFECT OF VARIETY OF ENSILED CORN AND HAY SUPPLEMENTATION ON MILK PRODUCTION

1968 ◽  
Vol 48 (1) ◽  
pp. 41-46 ◽  
Author(s):  
V. S. Logan ◽  
L. J. Fisher ◽  
P. S. Hayden
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Dry Matter ◽  
Corn Silage ◽  
Lactating Dairy Cows

Vacuum silages made from Pioneer 383 and Pride 5 corn were fed with concentrate and with and without hay to lactating dairy cows. Yields per hectare in terms of dry matter were 8,850 kg for Pioneer 383 and 8,350 kg for Pride 5. Intake of silage dry matter was significantly higher (P < 0.05) for Pride 5 (11.4 kg/day) than for Pioneer 383 (9.8 kg/day), and significantly lower (P < 0.05) for both silages when hay was fed (11.4 kg/day versus 9.7 kg/day). Fat-corrected milk production was significantly higher (P < 0.05) for Pride 5 (17.0 kg/day) than for Pioneer 383 silage (15.8 kg/day), and significantly higher (P < 0.05) when hay was fed, than without hay supplementation (167 kg/day versus 16.0 kg/day). Utilization of silage dry matter in terms of fat-corrected milk production per hectare was 10,486 kg for Pride 5 corn silage and 11,176 kg for Pioneer 383 corn silage.

scholarly journals Diet digestibility and performance of dairy cows supplemented with live yeast

2011 ◽  
Vol 68 (3) ◽  
pp. 301-307 ◽  
Author(s):  
Luciene Lignani Bitencourt ◽  
José Ricardo Martins Silva ◽  
Bruno Menezes Lopes de Oliveira ◽  
Gilson Sebastião Dias Júnior ◽  
Fernanda Lopes ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Milk Fat ◽  
Dry Matter ◽  
Corn Silage ◽  
Neutral Detergent Fiber ◽  
Yield Response ◽  
Citrus Pulp ◽  
Digestible Organic Matter ◽  
And Performance ◽  
Live Yeast

Dietary yeast supplementation may improve the digestive efficiency of ruminants, but responses depend on the yeast strain and the diet composition. Corn silage and citrus pulp are usual carbohydrate sources for dairy cows in southeast Brazil. This study evaluated the supplementation of dairy cows fedding on corn silage-citrus pulp-based diets with Saccharomyces cerevisiae CNCM I-1077 (Lallemand SAS, Toulouse, France). Twenty multiparous, midlactation Holstein cows were assigned to two treatments in crossover design. Treatments were: live yeast on oyster meal capable of supplying a daily minimum of 1 × 10(10) CFU per cow or oyster meal top-dressed at 10 g to the morning meal. Diet contained (% of dry matter): 16.8% crude protein, 30.9% neutral detergent fiber, 43.9% corn silage, 2% tifton hay, 14.4% steam flaked corn, 16.9% citrus pulp and 21.7% soybean meal. Yeast supplementation increased daily yields of milk (29.4 vs. 28.5 kg, p = 0.11), protein (0.939 vs. 0.908 kg, p = 0.05), and lactose (1.294 vs. 1.241 kg, p = 0.06), but did not affect milk fat contents (p = 0.59). Daily dry matter intake was 21.4 with yeast and 20.7 kg for the control (p = 0.11). Total tract apparent digestibility of the neutral detergent fiber was 48.1% with yeast and 43.2% for the control (p = 0.08). There was a trend for increased intake of digestible organic matter with yeast supplementation (p = 0.07). The positive milk protein yield response to yeast supplementation may have resulted from the increased fiber digestibility, but the response mechanism could not be elucidated.

RESPONSE OF LACTATING DAIRY COWS TO FORMALDEHYDE-TREATED SOYBEAN MEAL WHEN FED WITH CONTROL OR UREA-TREATED CORN SILAGE

1986 ◽  
Vol 66 (1) ◽  
pp. 85-95 ◽  
Author(s):  
J. D. ERFLE ◽  
F. D. SAUER ◽  
S. MAHADEVAN ◽  
R. M. TEATHER
Keyword(s):  
Body Weight ◽  
Dairy Cows ◽  
Milk Production ◽  
Soybean Meal ◽  
Dry Matter ◽  
Milk Protein ◽  
Rumen Fluid ◽  
Amino Acid Content ◽  
Negative Control ◽  
Corn Silage

In two experiments, lactating cows (26 in exp. 1; 32 in exp. 2) were fed an 11.3% crude protein (CP) diet, a 14.7% CP diet containing untreated soybean meal (SBM) or a 14.6% CP diet containing formaldehyde-treated SBM (FSBM), all three fed as a complete blended diet with control corn silage (CCS) (exp. 1); a 12% CP diet, a 13.4% CP diet containing SBM or a 13.3% CP diet containing FSBM, all fed as a complete blended diet with urea-treated corn silage (UCS) (exp. 2). In both experiments concentrates and CCS or UCS were mixed (50:50 dry matter) daily and fed ad lib for a 16-wk period. The increase of CP over the low CP negative control by addition of untreated SBM resulted in a significant (P < 0.05) increase in milk production in both experiments. The addition of FSBM had no significant effect. When comparing solids-corrected milk (SCM), addition of SBM, whether treated or not, significantly increased SCM in both experiments. In neither experiment did FSBM improve milk production over untreated SBM. All animals fed CCS lost body weight but there was no difference between treatments. For animals fed UCS the low CP group lost significantly (P < 0.05) more body weight than did the group fed FSBM. Dry matter (DM) intake was significantly (P < 0.05) lower for the FSBM fed group than for the group fed untreated SBM in exp. 1 (CCS). DM intake was significantly (P < 0.05) increased by either FSBM or SBM over the low CP control fed UCS. Milk protein was the only component significantly (P < 0.05) decreased by FSBM in exp. 1. Isobutyric and isovaleric acids were significantly (P < 0.05) lower in rumen fluid of animals on FSBM plus CCS. Rumen microbial protein content seemed to be more adversely affected by FSBM with CCS than UCS. Amino acid content of FSBM and SBM demonstrated that lysine and tyrosine were lost from SBM after treatment with formaldehyde. The lack of a response in milk production to FSBM is discussed in terms of a lysine and tyrosine deficiency for milk protein synthesis and the adverse effect that formaldehyde protection of SBM may have on the rumen microbial population. Key words: Lactation, dairy cows, urea, corn silage, soybean meal, formaldehyde treatment

scholarly journals Corn silage supplementation for dairy cows grazing annual ryegrass at two pasture allowances

2019 ◽  
Vol 71 (3) ◽  
pp. 1037-1046
Author(s):  
M.F. Miguel ◽  
R. Delagarde ◽  
H.M.N. Ribeiro-Filho
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Soybean Meal ◽  
Dry Matter ◽  
Lolium Multiflorum ◽  
Latin Square ◽  
Ground Level ◽  
Corn Silage ◽  
Annual Ryegrass ◽  
Strip Grazing

ABSTRACT Corn silage supplementation for dairy cows grazing in temperate annual pastures has rarely been investigated. The aim of this study is to compare two supplementation levels (0 and 4kg dry matter [DM]/day of a 7:1 mixture of corn silage and soybean meal) in dairy cows strip-grazing annual ryegrass (Lolium multiflorum Lam.) at two pasture allowances (PA, low= 25 and high = 40kg DM/d at ground level). The study was carried out according to an incomplete 4 × 3 Latin square design, using 12 cows and three experimental periods of 12 days. The green leaves allowances were only 4.9 and 8.5kg DM/d at the low and high PA, respectively. The total DM intake and milk production increased in supplemented cows compared to un-supplemented cows at the low PA, but were similar between supplementation levels at the high PA. The PI was unaffected by the PA, whereas the substitution rate was 0.68 in cows at the low PA and 1.35 in cows at the high PA. Corn silage supplementation may improve the total DM intake and milk production of dairy cows grazing in temperate annual pastures, but only at a low PA.

COMPARISON OF MALE STERILE CORN AND REGULAR CORN AS SILAGE FOR DAIRY COWS

1984 ◽  
Vol 64 (2) ◽  
pp. 427-434 ◽  
Author(s):  
P. L. BURGESS ◽  
J. W. G. NICHOLSON
Keyword(s):  
Dairy Cows ◽  
Milk Fat ◽  
Dry Matter ◽  
Nutritive Value ◽  
Corn Silage ◽  
Dry Matter Intake ◽  
Soluble Carbohydrate ◽  
Male Sterile ◽  
Relative Nutritive Value ◽  
Corn Hybrid

The relative nutritive value of male sterile corn silage (23.7% dry matter) and regular corn silage (26.5% dry matter) was determined with lactating dairy cows during three consecutive crop years. The regular corn hybrid had 25% of the kernels removed by black birds prior to harvesting. Grain was fed according to milk production (1 kg/2.75 kg milk) and silage was offered ad libitum as the only forage. Dry matter, soluble carbohydrate and insoluble nitrogen percentages were lower while crude protein and acid detergent fiber levels were higher in the male sterile corn silage. Apparent digestibilities of dry matter, nitrogen and energy determined with sheep were not different between silages. Silage dry matter intake and total dry matter intake were higher (P < 0.05) for cows fed regular corn silage in only one of the three trials. Actual milk, 4% fat-corrected milk yields and milk fat and protein percentages were not affected by silage treatment. Key words: Male sterile corn, silage, dairy cows

Effects of metabolizable protein on intake and milk production of dairy cows independent of effects on ruminal digestion

2003 ◽  
Vol 76 (1) ◽  
pp. 137-146 ◽  
Author(s):  
P. Faverdin ◽  
D. M’hamed ◽  
R. Vérité
Keyword(s):  
Food Intake ◽  
Dairy Cows ◽  
Protein Content ◽  
Dry Matter ◽  
Plasma Concentrations ◽  
Glucose Infusion ◽  
Ruminal Fermentation ◽  
Direct Role ◽  
Metabolizable Protein ◽  
Ruminal Digestion

AbstractThe rôle of protein in food intake regulation is complex in ruminants. Previous research has shown that a deficiency in degradable nitrogen (N) could affect microbial activity and decrease intake. On the other hand, an increase in metabolizable protein content of the diet seems to stimulate food intake in lactating dairy cows. The aim of this experiment was to determine whether metabolizable protein supply plays a direct rôle in the stimulation of food intake. Treatments comprised two infusions of soya protein isolate (800 g/day) either into the rumen (RP) or into the duodenum (DP), which were compared with two iso-energy infusions of glucose (880 g/day) either into the rumen (RG) or into the duodenum (DG). Four ruminally and duodenally cannulated cows producing 36·5 kg/day of milk were assigned to a 4 ✕ 4 Latin-square design with periods of 4 weeks. Duodenal infusions of protein (DP) significantly increased (P < 0·05) dry-matter intake (DMI) ( +1·9 kg/day), rate of intake ( + 8·2 g DMI per min), milk yield ( + 4 kg/day), protein content ( + 2·3 g/kg) and protein yield ( +191 g/day) compared with the glucose infusion in the duodenum (DG). No significant effect was observed with ruminal infusion of protein (RP) compared with the glucose infusion in the rumen (RG). The protein infusions had no effect (P > 0·05) on the apparent digestibility of dry matter, organic matter, neutral-detergent fibre or acid-detergent fibre and also no or only small effects on ruminal fermentation variables. Plasma concentrations of most of the essential amino acids increased significantly with the duodenal infusion of protein, whereas ruminal infusion of protein had no significant effect. It is concluded that direct supply of metabolizable protein stimulates intake independently of ruminal digestion effects.

The Effect of Chopping Corn Silage and TMR Mixing Time on Physically Effective NDF in Dairy Cows and Ruminal in situ Dry Matter Disappearance

2014 ◽  
Vol 48 (4) ◽  
pp. 229-239
Author(s):  
D. H. Lim ◽  
K. S. Ki ◽  
S. H. Choi ◽  
E. G. Kwon ◽  
T. I. Kim ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Dry Matter ◽  
Mixing Time ◽  
Corn Silage

EFFECTS OF SUPPLEMENTAL HAY ON CONSUMPTION OF LOW AND MEDIUM DRY MATTER CORN SILAGE BY HIGH-PRODUCING DAIRY COWS

1972 ◽  
Vol 52 (3) ◽  
pp. 491-495 ◽  
Author(s):  
D. E. WALDERN
Keyword(s):  
Body Weight ◽  
Dairy Cows ◽  
Dry Matter ◽  
Body Weight Gain ◽  
Corn Silage ◽  
Daily Production ◽  
Lactating Cows ◽  
Orchard Grass ◽  
Grass Hay ◽  
Daily Body Weight

The effects of supplementing low (23.9%) dry matter (DM) and medium (28.9%) DM corn silage roughage rations fed ad libitum to high-producing dairy cows, with orchard grass hay at 0.7% of their body weight on milk production and composition, was determined in a double reversal feeding trial using 24 lactating cows. Cows fed medium DM corn silage consumed 15.2% more DM/100 kg body weight daily than those cows fed low DM silage (P < 0.05). Supplemental hay fed with either low or medium DM silage resulted in equal consumption of total forage DM/100 kg body weight by cows on the two treatments. Each kilogram of hay DM consumed by cows offered low DM corn silage reduced silage DM intake by 0.47 kg, whereas hay DM intake reduced silage DM intake by 0.79 kg for cows offered medium DM silage. Daily production of 4% fat-corrected milk (FCM), percent nonfat solids (SNF), and daily body weight gain were lower for cows consuming low DM corn silage than for those on the other treatments (P < 0.05). Cows consuming low DM corn silage plus orchard grass hay at 0.7% of their body weight produced milk at the same level and of similar protein, lactose, and SNF content as those fed medium DM silage plus hay. Supplemental hay fed with medium or low DM corn silage increased FCM production over feeding silage alone, independent of DM or moisture content of the silage fed (P < 0.05).

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