Silage and milk production: a comparison between three grass silages of different digestibilities

Castle, M. E.; Retter, W. C.; Watson, J. N.

doi:10.1111/j.1365-2494.1980.tb01515.x

Cited by 21 publications

(17 citation statements)

References 12 publications

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“…The general trends between silage D ‐value and the production responses seem clear, but the magnitude of response was subject to considerable variation. The response varied from 0.02 kg/day ECM per 10 g/kg DM increase in D ‐value in Castle, Retter, and Watson () to 0.92 kg/day ECM per 10 g/kg DM increase in D ‐value in Davies and Clench (). Variable silage fermentation characteristics might introduce variation in the response by modifying silage intake potential (Huhtanen et al, ); for example, early harvested silages sometimes have a lower DM concentration and are more extensively fermented.…”

Section: Discussionmentioning

confidence: 99%

“…The general trends between silage D-value and the production responses seem clear, but the magnitude of response was subject to considerable variation. The response varied from 0.02 kg/day ECM per 10 g/kg DM increase in D-value in Castle, Retter, and Watson (1980) to 0.92 kg/day ECM per 10 g/kg DM increase in D-value in Davies and Clench (1987).…”

Section: Effect Of Grass Maturity Stage On Milk Productionmentioning

confidence: 99%

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Modelling feed intake and milk yield responses to different grass ley harvesting strategies

Pang

Krizsan

Sairanen

et al. 2019

Grass and Forage Science

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A meta‐analysis of feeding trials using grass silages was conducted to predict production responses for dairy cows fed grass silage. They were divided into two subsets: 69 diets from 11 studies were used for comparison of silages made from primary growth and regrowth grass (harvesting subset), and another 157 diets from 24 studies were used for comparison of digestibility influenced by the maturity of grass ensiled (D‐value, digestible organic matter in dry matter) (maturity subset). The minimum prerequisite for an experiment to be included in the data set was that milk production, feed intake, silage characteristics and concentrate ingredients were reported. Both subsets were analysed using the mixed model procedures of SAS. The mean response in dry‐matter intake (DMI) and silage DMI to improved silage D‐value was 0.0175 and 0.0161 kg per unit D‐value (g/kg DM) respectively. The average increase in milk and energy‐corrected milk yield was 0.30 and 0.37 kg per 10‐unit increase in silage D‐value respectively. Milk protein concentration increased, and fat concentration tended to increase with enhanced silage D‐value. Each 10‐unit increase in D‐value reduced milk yield by 0.092 kg at a given dietary metabolizable energy intake (MEI), suggesting that the ME concentration of high D‐value silages was overestimated. Cows fed regrowth silage produced 0.55 kg/day more energy‐corrected milk than those fed primary growth silage at a given dietary MEI. The prediction models can be used to improve ration formulation systems or incorporated into economic models for optimizing milk production in various farming systems.

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Section: Discussionmentioning

confidence: 99%

Section: Effect Of Grass Maturity Stage On Milk Productionmentioning

confidence: 99%

Modelling feed intake and milk yield responses to different grass ley harvesting strategies

Pang

Krizsan

Sairanen

et al. 2019

Grass and Forage Science

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“…In both experiments the sampling of the silages and concentrates, milk recording and sampling, cow weighing and measurement of water intake were as described previously (Castle et al, 1980;Retter and Castle, 1982).…”

Section: Methodsmentioning

confidence: 99%

Silage and milk production: studies with molasses and formic acid as additives for grass silage

Castle

Watson

1985

Grass and Forage Science

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In two separate feeding experiments using a total oftwenty-four individually housed Ayrshire cows six silages made from perennial ryegrass were offered ad libitum with supplements of concentrates. In Experiment 1 herbage with a dry matter (DM) concentration of 225 g kg~' received either formic acid ('Add-F') at the rate of 2-0 litres t~' or undiluted cane molasses at rates of 10, 20 and 30 litres t~'; the mean daily silage intakes were 9-54, 9 08, 9 27 and 9 49 kg DM per cow and the daily milk yields, corrected to 40 g fat kg"', were 23-2, 22 3, 22-8 and 22 9 kg per cow respectively but none of the differences between the four treatments was significant. In Experiment 2 herbage with a DM concentration of 269 g kg"' received formic acid at a uniform rate of 2-6 litres t~' either with or without an additional application of molasses at 20 litres t~'; the mean daily silage DM intakes were 8-70 and 9-28 kg per cow and the daily fat-corrected milk yields were 22-2 and 21 -9 kg per cow respectively and were not significantly different. In both experiments the efTects of the treatments on milk composition were small and not significant. It is concluded that there were no advantages in applying molasses to herbage treated with formic acid, and that the rate of application of molasses to untreated herbage which equated with the formic acid application was 20-30 litres t~' when assessed on the basis of silage composition, intake and milk production.

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“…In comparison, Castle et al (1980) estimated a daily ration requirement of 21 kg concentrate DM to produce the same milk yield from cows given 650 and 624 compared with 712 DOMD silage. The same milk yield was obtained on a mixed diet of low digestibility silage plus 3 kg concentrate DM where energy intake was equal to requirements.…”

Section: Milk Yield Milk Composition and Solids Yieldmentioning

confidence: 99%

Milk production from grass silage diets: effects of silage characteristics and the amount of supplementary concentrate

Aston¹,

Thomas

Daley³

et al. 1994

Anim. Sci.

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High digestibility ryegrass was ensiled using either good methods including formic acid application (HDG) or poor methods without formic acid (HDP). Low digestibility ryegrass (LDG) and lucerne (LUC) were ensiled using similar methods to HDG. Digestible organic matter in the dry matter (DM) in vivo (DOMD) for HDG, HDP, LDG and LUC were 0-756, 0-774, 0-645 and 0-562 respectively. Silages were offered ad libitum to 40 Holstein-Friesian cows in two Latin-square design experiments during weeks 8 to 22 of lactation either alone (experiment 1) or with 3, 6, 9 or 12 kg concentrate DM per day (experiment 2). Relative intakes of silage given alone were respectively 1-00, 0-44, 0-98 and 0-79. Low intake of HDP could not be predicted from silage analysis. In experiment 2, DM intake increased by 0-11 kg and milk yield by 0-24 kg for each 0-010 change in grass silage DOMD. Intake of HDG, LDG and LUC declined linearly with increasing concentrate, on HDP the effect was nonlinear and intake increased up to the 6 kg level. In experiment 1, milk and protein yields were greatest on HDG, protein yield was higher on LDG than LUC and fat concentration higher on HDP and LUC. With supplementation milk yield was greatest on HDG up to the 6 kg level, at higher levels differences between silages were not significant. Fat concentration was highest on LDG and protein highest on HDG and lowest on LUC. On all silages giving the highest concentrate level reduced the concentration and yield of fat. Protein concentration increased up to the 9 kg level. Fat plus protein yields reached a maximum on HDG with 6 kg concentrate DM per day and with 9 kg on the remaining silages.

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Silage and milk production: a comparison between three grass silages of different digestibilities

Cited by 21 publications

References 12 publications

Modelling feed intake and milk yield responses to different grass ley harvesting strategies

Modelling feed intake and milk yield responses to different grass ley harvesting strategies

Silage and milk production: studies with molasses and formic acid as additives for grass silage

Milk production from grass silage diets: effects of silage characteristics and the amount of supplementary concentrate

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