Effect of maize silage quality in a mixed forage diet and the crude protein level in the concentrate supplement on milk production of dairy cows

1998 ◽  
Vol 1998 ◽  
pp. 149-149
Author(s):  
J.J. Fitzgerald ◽  
J.J. Murphy
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Crude Protein ◽  
Starch Content ◽  
Protein Supplementation ◽  
Optimum Level ◽  
Maize Silage ◽  
Grass Silage ◽  
High Starch Content ◽  
Additional Protein

Good quality maize silage with a high starch content and DM digestibility when fed to dairy cows increased forage intake, milk production and milk protein concentration compared with grass silage or low starch maize silage (Fitzgerald, 1997). Due to the low crude protein (CP) content of maize silage compared with grass silage, additional protein supplementation is required in the concentrate. The optimum level of protein in the concentrate for maize silage based forages differing in starch content was investigated in this study.Three forages consisting of either all grass silage (GS) or mixed forages of grass silage and maize silage (40:60 DM mix) which contained either a low (LSM) or a high (HSM) starch content were offered ad libitum to individually fed dairy cows in early lactation (12 cows/forage). Each forage was supplemented with concentrates (6 kg/day) containing 180, 230 or 280 g CP/kg according to a change over design (3 periods of 3 weeks/period).

Effect of maize silage quality in a mixed forage diet and the crude protein level in the concentrate supplement on milk production of dairy cows

1998 ◽  
Vol 1998 ◽  
pp. 149-149 ◽  
Author(s):  
J.J. Fitzgerald ◽  
J.J. Murphy
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Crude Protein ◽  
Starch Content ◽  
Protein Supplementation ◽  
Optimum Level ◽  
Maize Silage ◽  
Grass Silage ◽  
High Starch Content ◽  
Additional Protein

Good quality maize silage with a high starch content and DM digestibility when fed to dairy cows increased forage intake, milk production and milk protein concentration compared with grass silage or low starch maize silage (Fitzgerald, 1997). Due to the low crude protein (CP) content of maize silage compared with grass silage, additional protein supplementation is required in the concentrate. The optimum level of protein in the concentrate for maize silage based forages differing in starch content was investigated in this study.Three forages consisting of either all grass silage (GS) or mixed forages of grass silage and maize silage (40:60 DM mix) which contained either a low (LSM) or a high (HSM) starch content were offered ad libitum to individually fed dairy cows in early lactation (12 cows/forage). Each forage was supplemented with concentrates (6 kg/day) containing 180, 230 or 280 g CP/kg according to a change over design (3 periods of 3 weeks/period).

Effect of timing of protein supplementation on the performance of lactating dairy cows

2005 ◽  
Vol 45 (4) ◽  
pp. 337
Author(s):  
B. C. Granzin
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Milk Fat ◽  
Protein Supplementation ◽  
Net Energy ◽  
Maize Silage ◽  
Holstein Friesian ◽  
Grazing Dairy Cows ◽  
And Control ◽  
Friesian Cows

Two experiments were undertaken to determine the effect of timing of protein supplementation on performance of grazing, lactating Holstein–Friesian cows fed maize silage and grain-based concentrate. In experiment 1, 36 cows were fed 0.8 kg DM/day of solvent-extracted cottonseed meal (CSM) either as 1 meal at 1200 hours with maize silage (CSM 1200) or at 1530 hours with concentrate (CSM 1530), or in 2 meals at 0600 and 1530 hours with concentrate (CSM 600 + 1530). In experiment 2, 36 cows were either fed no CSM (control) or fed 1.0 kg DM/day as either CSM 1200 or CSM 600 + 1530. In experiment 1, daily yields of 4% fat-corrected milk (FCM) and milk fat for CSM 600 + 1530 were significantly higher than for CSM 1530 with respective means of 22.8 v. 20.7 L and 895 v. 804 g. Daily yields of FCM and milk fat for CSM 1200 were intermediate (21.7 L and 841 g/cow, respectively). A similar trend for daily protein yield per cow was noted (712, 695 and 666 g for CSM 600 + 1530, 1200 and 1530, respectively). In experiment 2, milk yield differed numerically between CSM 600 + 1530 and other treatments, with means (± s.e.d.) of 24.7 ± 0.78, 22.9 ± 0.78 and 22.9 ± 0.78 L/cow.day for CSM 600 + 1530, CSM 1200 and control, respectively. Mean (± s.e.d.) net energy requirements for milk production and liveweight change tended to be lower for the control (68 ± 3.6 MJ/cow.day) as opposed to CSM 600 + 1530 (79 ± 3.6 MJ/cow.day) and CSM 1200 (76 ± 3.6 MJ/cow.day). Cumulative time where rumen degradable nitrogen:rumen degradable dry matter was less than 22 g/kg were 2, 2 and 3 h for CSM 600 + 1530, CSM 1200 and CSM 1530, respectively, in experiment 1, and 6, 4 and 2 h for the control, 1200 and CSM 600 + 1530, respectively, in experiment 2. No differences in rumen ammonia-N concentrations were noted between treatments in experiment 1. In experiment 2, a significantly lower mean (± s.e.d.) rumen ammonia-N concentration was recorded for the control at 1530 hours (62 ± 14.1 mg/dL) in comparison to CSM 600 + 1530 (114 ± 14.1 mg/dL) and CSM 1200 (119 ± 14.1 mg/dL). These experiments show that for grazing dairy cows supplemented with maize silage and grain-based concentrate, feeding a daily aliquot of CSM as 2 meals at 0600 and 1530 hours rather than 1 meal at 1200 or 1530 hours improves milk production.

The effects of intraruminal infusions of urea on the voluntary intake and milk production of cows receiving grass silage diets

1990 ◽  
Vol 57 (4) ◽  
pp. 455-464 ◽  
Author(s):  
Jai-Jun Choung ◽  
David G. Chamberlain ◽  
Phillip C. Thomas ◽  
Ian Bradbury
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Crude Protein ◽  
Clinical Symptoms ◽  
Factors Associated ◽  
Grass Silage ◽  
Lactating Cows ◽  
Insulin In Plasma ◽  
Voluntary Intake ◽  
Higher Doses

SummaryResponses of dairy cows given silage diets to the intraruminal infusion of urea in progressively increasing doses were studied in four experiments, two with non-lactating cows and two with lactating cows. No clinical symptoms of NH3 toxicity were observed in any of the experiments. When urea was infused continuously, silage intake was depressed (P < 0·05) when the total supply of N exceeded the equivalent of 250g crude protein (CP)/kg DM in the total diet. However, when the urea load was administered twice daily, as opposed to continuously, intake depression (P < 0·05) occurred at the equivalent of 170g CP/kg DM. At the higher doses of urea, concentrations of NH3 in peripheral blood increased and were accompanied by increased concentrations of glucose and reduced levels of insulin in plasma. In general, responses of milk production followed those of silage intake but there was evidence of greater proportional reductions in the yield of lactose relative to that of fat and protein. It is concluded that the voluntary intake of high-protein silages may be depressed by factors associated with high rates of absorption of NH3 from the rumen.

Maize silage and Italian ryegrass silage as high-energy forages in organic dairy cow diets: Differences in feed intake, milk yield and quality, and nitrogen efficiency

2013 ◽  
Vol 29 (4) ◽  
pp. 378-387 ◽  
Author(s):  
L. Baldinger ◽  
W. Zollitsch ◽  
W.F. Knaus
Keyword(s):  
Dairy Cows ◽  
Dairy Cow ◽  
Feed Intake ◽  
Crude Protein ◽  
Milk Protein ◽  
High Energy ◽  
Italian Ryegrass ◽  
Maize Silage ◽  
Grass Silage ◽  
Organic Dairy

AbstractDuring the winter feeding period in organic dairy production systems in the alpine and pre-alpine regions of Austria and its neighboring countries, maize silage is an energy-rich forage that is regularly included in grass-silage-based diets to improve the energy supply of the cows. Italian ryegrass (Lolium multiflorumLam.) is also a high-energy fodder grass popular as forage for dairy cows, but it is rarely cultivated in Austrian organic agriculture. The two crops differ in their cultivation demands and characteristics. Italian ryegrass establishes rapidly and may reduce the risk of soil erosion. Italian ryegrass would be a beneficial addition to crop rotation, which is an essential tool in successful organic farming. In a 15-week feeding trial, Italian ryegrass silage and maize silage were fed to 22 lactating Holstein dairy cows. Organically produced Italian ryegrass silage and maize silage were included at a rate of 40% [of dry matter (DM)] in grass-silage-based mixed basal diets. The mixed basal diets were supplemented with modest amounts of additional concentrates (2.7–3.0 kg DM day−1). Owing to the higher energy content of maize silage as compared to Italian ryegrass silage, the maize diet provided more energy [6.3 MJ net energy for lactation (NEL) kg−1DM] than the ryegrass diet (6.15 MJ NEL kg−1DM). The protein supply of the maize diet and the ryegrass diet was intended to be equal, but in fact the protein content of the maize diet was significantly lower (122 g crude protein kg−1DM) than that of the ryegrass diet (141 g kg−1DM). When the maize diet was fed, feed intake, milk yield and milk protein content were significantly higher as compared to the ryegrass diet. Also, intake of crude protein was significantly lower when feeding the maize diet, and in combination with the higher milk protein yield, this enabled an efficiency of gross nitrogen (N) utilization as high as 0.304. This level of N efficiency can be considered as above average and was significantly and considerably higher than the level of 0.259 observed when the ryegrass diet was fed. Therefore, maize silage upholds its reputation as an ideal energy-rich component in grass-silage-based dairy cow diets.

Effects of mixtures of red clover and maize silages on milk production and Nitrogen utilisation by dairy cows

2005 ◽  
Vol 2005 ◽  
pp. 23-23
Author(s):  
R. J. Dewhurst ◽  
R. J. Merry ◽  
L. J. Davies
Keyword(s):  
Dairy Cows ◽  
Dairy Cow ◽  
Starch Content ◽  
Red Clover ◽  
Maize Silage ◽  
High Intake ◽  
Grass Silage ◽  
Oil Resources ◽  
Use Efficiency ◽  
N Use

Legumes are important to sustainable agriculture because of their N fixing ability and consequent reduced reliance on increasingly scarce oil resources. Our previous studies showed consistently higher intakes and milk yields when red clover silage replaced grass silage in dairy cow diets (Dewhurst et al., 2003). However, the increased intakes of a forage which contains higher levels of N led to a reduction in the efficiency of conversion of feed N into milk N (g/g) from around 0.25 to 0.20 or less. Maize silage has similar high intake characteristics, but its low N content and considerable starch content suggest that it would be highly complementary to red clover silage in terms of N-use efficiency. This study evaluated production and efficiency responses to mixtures of red clover and maize silages in comparison with perennial ryegrass silage.

Factors effecting the feeding value of maize and grass silage in late lactation dairy cows

1999 ◽  
Vol 1999 ◽  
pp. 79-79
Author(s):  
F.J. Mulligan ◽  
F.P. O'Mara ◽  
M. Rath ◽  
P.J. Caffrey ◽  
J. Callan ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Dry Matter ◽  
Maize Silage ◽  
Grass Silage ◽  
Feeding Value ◽  
High Starch ◽  
Ad Libitum ◽  
Degradable Protein

Higher dry matter intakes (DMI) have been reported in dairy cows fed maize silage than in dairy cows fed grass silage. The objective of this experiment was to investigate this phenomenon by the measurement of digestibility and the determination of rumen outflow rates for both forages. The response in milk production of late lactation dairy cows to grass or maize silage was also measured.Fourteen late lactation multiparous dairy cows (n = 7) were fed diets containing either grass silage (GS) (DM: 197g/kg; pH: 4.05; NDF: 642g/kg DM) or high starch maize silage (MS) (DM: 339g/kg; pH: 3.94; starch: 360g/kg DM; NDF: 442g/kg DM) ad-libitum plus 4kgs/hd/day of a dairy concentrate (233g CP/kg DM). Urea (460g N/kg DM) was used as a source of degradable protein (10g/kg DM) for the MS diet which also included straw (40g/kg DM). Dietary NDF equalled 542 and 423g/kg DM for the GS and MS diet.

The effect on milk production of replacing grass silage with maize silage in the diet of dairy cows

1998 ◽  
Vol 55 (1) ◽  
pp. 79-87 ◽  
Author(s):  
F.P O'Mara ◽  
J.J Fitzgerald ◽  
J.J Murphy ◽  
M Rath
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Maize Silage ◽  
Grass Silage

scholarly journals Supply of nutrients and productive responses in dairy cows given diets based on restrictively fermented silage

1998 ◽  
Vol 7 (2) ◽  
pp. 219-250 ◽  
Author(s):  
Pekka Huhtanen
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Evaluation System ◽  
Milk Protein ◽  
High Efficiency ◽  
Protein Supplementation ◽  
Protein Yield ◽  
Grass Silage ◽  
Body Tissues ◽  
Protein Supply

The objective of this paper is to review research which has evaluated the feeding of dairy cows with diets containing large proportions of grass silage. In Finland, milk production systems evolved are based on the use of restrictively fermented silages. Higher potential yields, smaller production risks than with cereal grains, short grazing period and high digestibility of grasses grown in northern latitudes have facilitated this development. Factors affecting nutrient supply from these diets are discussed. Digestibility is determined mainly by the stage of maturity at harvesting and it is not markedly affected by the level of energy and protein supplementation. Intake of grass silage is influenced both by digestibility and fermentation characteristics. Efficiency of microbial synthesis is high in animals given diets based on restrictively fermented silage but rumen fermentation pattern is characterised by low molar proportions of propionate. Production responses to additional concentrate are relatively small, especially when the amount of concentrate exceeds 10 kg day-1. High substitution of silage dry matter (DM), negative associative effects on digestion and partitioning of energy towards body tissues account for small production responses. Protein supplementation has consistently increased milk protein yield but responses do not appear to be related to the level of milk production, silage crude protein content, amount of concentrate or stage of lactation. The new protein evaluation system provides an accurate prediction of protein yield with the typical Finnish dairy cow diets. The high slopes (ca. 0.5) between protein supply and milk protein yield within experiments suggest that protein supply is suboptimal and protein supplements are used with a high efficiency.

scholarly journals The influence of slowly and rapidly degradable concentrate protein on a number of blood parameters in dairy cattle.

1988 ◽  
Vol 36 (1) ◽  
pp. 51-62
Author(s):  
W.A.G. Veen ◽  
Y.T. Bakker
Keyword(s):  
Amino Acids ◽  
Milk Production ◽  
Crude Protein ◽  
Blood Parameters ◽  
Net Energy ◽  
Maize Silage ◽  
Grass Silage ◽  
Feeding Trials ◽  
Digestible Crude Protein ◽  
Degradable Protein

In 3 feeding trials high-yielding cows and heifers (102, 72 and 92, respectively) were given diets from week 2 of lactation containing grass silage and maize silage and concentrates with slowly or rapidly degradable protein (DP). Diets were given according to the standard or slightly above the standard for digestible crude protein and net energy for milk production. A sample of peripheral blood was taken immediately before the morning feed and at 3-4.5 h after the concentrate was given. Blood urea was higher and blood glucogenic amino acids were lower (P

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