The in situ degradability of dry matter, neutral detergent fibre and starch in whole-crop wheat harvested at three stages of maturity

1998 ◽  
Vol 1998 ◽  
pp. 147-147
Author(s):  
T.C. Moos ◽  
J.D. Sutton
Keyword(s):  
Dairy Cows ◽  
Dry Matter ◽  
Early Stage ◽  
Neutral Detergent Fibre ◽  
Lactating Dairy Cows ◽  
Aerobic Stability ◽  
Three Stages

The choice of optimal stage of maturity at harvest for whole-crop wheat remains controversial. Problems of aerobic stability with crops harvested and ensiled at an early stage led to increased interest in harvesting at a later stage and preserving the crop with urea. However recent studies have shown low starch and fibre digestibility with such crops when fed to lactating dairy cows (Sutton et al.,1991). The purpose of the present work was to determine the effect of harvesting wheat at three stages of maturity on the in situ degradability of dry matter (DM), neutral detergent fibre (NDF) and starch.

The in situ degradability of dry matter, neutral detergent fibre and starch in whole-crop wheat harvested at three stages of maturity

1998 ◽  
Vol 1998 ◽  
pp. 147-147
Author(s):  
T.C. Moos ◽  
J.D. Sutton
Keyword(s):  
Dairy Cows ◽  
Dry Matter ◽  
Early Stage ◽  
Neutral Detergent Fibre ◽  
Lactating Dairy Cows ◽  
Aerobic Stability ◽  
Three Stages

The choice of optimal stage of maturity at harvest for whole-crop wheat remains controversial. Problems of aerobic stability with crops harvested and ensiled at an early stage led to increased interest in harvesting at a later stage and preserving the crop with urea. However recent studies have shown low starch and fibre digestibility with such crops when fed to lactating dairy cows (Sutton et al.,1991). The purpose of the present work was to determine the effect of harvesting wheat at three stages of maturity on the in situ degradability of dry matter (DM), neutral detergent fibre (NDF) and starch.

Effect of subacute ruminal acidosis on in situ digestion of mixed hay in lactating dairy cows

2001 ◽  
Vol 81 (3) ◽  
pp. 421-423 ◽  
Author(s):  
J. C. Plaizier ◽  
J. E. Keunen ◽  
J-P. Walton ◽  
T. F. Duffield ◽  
B. W. McBride
Keyword(s):  
Dairy Cows ◽  
Key Words ◽  
Dry Matter ◽  
Subacute Ruminal Acidosis ◽  
Total Mixed Ration ◽  
Neutral Detergent Fibre ◽  
Ruminal Acidosis ◽  
Lactating Dairy Cows

Induction of subacute ruminal acidosis (SARA) by replacing 25% of the total mixed ration (TMR) intake [dry matter (DM) basis] with pellets consisting of 50% wheat and 50% barley, reduced the in situ DM and neutral detergent fibre (NDF) digestion of mixed hay. In situ 48 h NDF disappearance was reduced from 39.5 to 30.9% (P < 0.05). Key words: Sub-acute ruminal acidosis, fibre digestibilty, dairy cows

scholarly journals Predicting Daily Dry Matter Intake Using Feed Intake of First Two Hours after Feeding in Mid and Late Lactation Dairy Cows with Fed Ration Three Times Per Day

Animals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 104
Author(s):  
Shulin Liang ◽  
Chaoqun Wu ◽  
Wenchao Peng ◽  
Jian-Xin Liu ◽  
Hui-Zeng Sun
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Dry Matter ◽  
Prediction Equation ◽  
Dry Matter Intake ◽  
Validation Dataset ◽  
Nutrient Requirements ◽  
Independent Dataset ◽  
Lactating Dairy Cows ◽  
Proposed Model

The objective of this study was to evaluate the feasibility of using the dry matter intake of first 2 h after feeding (DMI-2h), body weight (BW), and milk yield to estimate daily DMI in mid and late lactating dairy cows with fed ration three times per day. Our dataset included 2840 individual observations from 76 cows enrolled in two studies, of which 2259 observations served as development dataset (DDS) from 54 cows and 581 observations acted as the validation dataset (VDS) from 22 cows. The descriptive statistics of these variables were 26.0 ± 2.77 kg/day (mean ± standard deviation) of DMI, 14.9 ± 3.68 kg/day of DMI-2h, 35.0 ± 5.48 kg/day of milk yield, and 636 ± 82.6 kg/day of BW in DDS and 23.2 ± 4.72 kg/day of DMI, 12.6 ± 4.08 kg/day of DMI-2h, 30.4 ± 5.85 kg/day of milk yield, and 597 ± 63.7 kg/day of BW in VDS, respectively. A multiple regression analysis was conducted using the REG procedure of SAS to develop the forecasting models for DMI. The proposed prediction equation was: DMI (kg/day) = 8.499 + 0.2725 × DMI-2h (kg/day) + 0.2132 × Milk yield (kg/day) + 0.0095 × BW (kg/day) (R2 = 0.46, mean bias = 0 kg/day, RMSPE = 1.26 kg/day). Moreover, when compared with the prediction equation for DMI in Nutrient Requirements of Dairy Cattle (2001) using the independent dataset (VDS), our proposed model shows higher R2 (0.22 vs. 0.07) and smaller mean bias (−0.10 vs. 1.52 kg/day) and RMSPE (1.77 vs. 2.34 kg/day). Overall, we constructed a feasible forecasting model with better precision and accuracy in predicting daily DMI of dairy cows in mid and late lactation when fed ration three times per day.

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.

The effect of compound composition and silage characteristics on silage intake, feeding behaviour, production of milk and live-weight change in lactating dairy cows

1991 ◽  
Vol 52 (1) ◽  
pp. 11-19 ◽  
Author(s):  
D. A. Jackson ◽  
C. L. Johnson ◽  
J. M. Forbes
Keyword(s):  
Dairy Cows ◽  
Weight Change ◽  
Milk Fat ◽  
Feeding Behaviour ◽  
Dry Matter ◽  
Live Weight ◽  
Productive Performance ◽  
Lactating Dairy Cows ◽  
Principal Energy ◽  
Friesian Cows

ABSTRACTAn experiment was carried out to investigate the effects of compound composition and silage characteristics on silage intake, feeding behaviour and productive performance of dairy cows during the first 25 weeks of lactation. Over a period of 3 years, 36 lactating British Friesian cows (12 per year), in their third or later lactations, were divided into two groups. The cows in each group received either compound S, in which the principal energy source was cereal starch, or compound F containing a mixture of high quality digestible fibre. Cows given compound F ate 2·2 kg more silage dry matter per day (P < 0·05). The type of compound had no effect on the frequency of silage feeding and the time spent eating was significantly different only over weeks 10 to 25 of lactation (P < 0·05), with cows on compound F spending on average 20 min longer feeding per day. Cows on compound F produced 1·7 kg more milk per day than cows on compound S. Although there were no significant differences in the concentration of milk constituents, compound F was associated with higher yields of milk constituents. Significant differences were found between the years of experiment in the frequency of feeding (P < 0·05) and also in the concentration of milk protein and milk fat. There were no significant differences in the magnitude of live-weight change between treatments or year of experiment.

The influence of heavily fertilized grass on mineral metabolism of dairy cows

1970 ◽  
Vol 74 (1) ◽  
pp. 11-21 ◽  
Author(s):  
A. J. Mudd
Keyword(s):  
Dairy Cows ◽  
Dry Matter ◽  
Mineral Metabolism ◽  
Matter Content ◽  
Dry Matter Content ◽  
Lactating Dairy Cows ◽  
Dietary Potassium ◽  
Calcium And Phosphorus ◽  
Negative Balance

SUMMARYGroups of lactating dairy cows were fed on grass which had received various amounts of nitrogen and potash fertilizers. In the early part of the season not only was the herbage concentration of calcium and phosphorus lower in grass which had received potash fertilizer but in addition the ‘availability’ of the calcium to cows was depressed. Grass which had received large amounts of nitrogen fertilizer had a comparatively low dry-matter content in the autumn. Cows fed such grass were in negative balance for calcium at this time. As expected high dietary potassium gave rise to high excretion of potassium in the urine which in turn was correlated with high excretion of magnesium. These various factors are likely to affect the incidence of metabolic disease.

Whole crop wheat: effect of crop maturity on feed intake and milk production of dairy cows

1998 ◽  
Vol 1998 ◽  
pp. 146-146 ◽  
Author(s):  
R. H. Phipps ◽  
J.D. Sutton ◽  
A. K. Jones
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Feed Intake ◽  
Dry Matter ◽  
Milk Composition ◽  
Additional Treatment ◽  
Aerobic Stability ◽  
Forage Intake ◽  
The Uk ◽  
Crop Maturity

Interest in the use of whole crop cereals as a complementary forage for dairy cows has developed in Europe over the last fifteen years. Initial studies in the UK concluded that near maximum dry matter (DM) yield/ha of whole crop wheat (WCW) occurred in late July/early August when crops contained at least 500 g/kg DM. However, it was noted that when these crops were ensiled they tended to be aerobically unstable. To minimise this problem it was recommended that these crops were preserved with urea rather than being ensiled. Early studies with dairy cows demonstrated that the use of both urea-treated and low DM fermented WCW increased forage intake and milk yield but effects on milk composition were inconsistent (Leaver and Hill, 1992, Phipps et al., 1995). Concern has been expressed that the use of urea in crop preservation was environmentally unacceptable and that high DM fermented WCW offered a possible alternative, which would provide high DM yields/ha of a starch-rich crop. The objective of the current study was to examine the effect of crop maturity on feed intake and milk production of dairy cows. An additional treatment was included to examine the effectiveness of an additive containing L. buchneri designed to improve aerobic stability.

In vitro digestion and ruminal degradation of soybean hulls

2007 ◽  
Vol 2007 ◽  
pp. 166-166 ◽  
Author(s):  
Hamid Mohammadzadeh ◽  
Ali Nikkhah ◽  
Kamran Reza-Yazdi ◽  
Hassan Mehrabani-Yeganeh
Keyword(s):  
Dairy Cows ◽  
In Vitro Digestion ◽  
Soybean Hulls ◽  
Lactating Dairy Cows ◽  
Ruminal Degradation ◽  
Ruminant Animals ◽  
Soybean Processing

Dairy producers use soyhulls, a byproduct of soybean processing, to replace either grain or forage in diets of lactating dairy cows. In view of the nutritional and economical value of soyhulls it is anticipated that this practice will continue to increase in popularity among nutritionists and producers of ruminant animals. According to the NRC (2001), SH contain 60.3% NDF and 44.6% ADF on a DM basis. Also The CP content of SH averaged 11.8%, which is within the range of 13.9± 4.6%. The objectives of this paper are to evaluate the in vitro DM and OM digestibility and in situ degradability of DM, CP and NDF contents of soybean hulls.

Sign in / Sign up

Export Citation Format

Share Document