The effects of bacterial inoculation of unwilted and wilted grass silages on digestibility by sheep and intake and performance by dairy cows

1996 ◽  
Vol 1996 ◽  
pp. 66-66
Author(s):  
T. Yan ◽  
D.C. Patterson ◽  
F.J. Gordon
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Perennial Ryegrass ◽  
Bacterial Inoculation ◽  
Bacterial Inoculants ◽  
And Performance ◽  
Two Parameters

In a previous study carried out at this Institute the application of a bacterial inoculant to unwilted grass at ensiling produced significant increases in silage DM intake and milk production across 3 harvests, while the use of the inoculant with wilted grass silages indicated no benefits in those two parameters (Yan, Patterson and Gordon, 1995). The reason for the lack of improvement when the inoculant was used with wilted grass silages was unclear, but could partially reflect greater potential rates of aerobic deterioration with wilted inoculated than wilted untreated silages during the feeding-out period. The present study was designed to further investigate the effects of inoculation of both unwilted and wilted grass silages.A set of four silages, comprising unwilted and wilted material, both with and without application of one of four bacterial inoculants at ensiling, was prepared from perennial ryegrass swards on each of 8 harvesting occasions during 1994.

The effects of bacterial inoculation of unwilted and wilted grass silages on digestibility by sheep and intake and performance by dairy cows

1996 ◽  
Vol 1996 ◽  
pp. 66-66
Author(s):  
T. Yan ◽  
D.C. Patterson ◽  
F.J. Gordon
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Perennial Ryegrass ◽  
Bacterial Inoculation ◽  
Bacterial Inoculants ◽  
And Performance ◽  
Two Parameters

In a previous study carried out at this Institute the application of a bacterial inoculant to unwilted grass at ensiling produced significant increases in silage DM intake and milk production across 3 harvests, while the use of the inoculant with wilted grass silages indicated no benefits in those two parameters (Yan, Patterson and Gordon, 1995). The reason for the lack of improvement when the inoculant was used with wilted grass silages was unclear, but could partially reflect greater potential rates of aerobic deterioration with wilted inoculated than wilted untreated silages during the feeding-out period. The present study was designed to further investigate the effects of inoculation of both unwilted and wilted grass silages.A set of four silages, comprising unwilted and wilted material, both with and without application of one of four bacterial inoculants at ensiling, was prepared from perennial ryegrass swards on each of 8 harvesting occasions during 1994.

Genetic variation of rectal temperature and its relationship to milk production in Holstein dairy cows

2009 ◽  
Vol 2009 ◽  
pp. 63-63
Author(s):  
S Khalajzade ◽  
N Emam Jomeh ◽  
A Salehi ◽  
A Moghimi Esfandabadi
Keyword(s):  
Heat Stress ◽  
Dairy Cows ◽  
Milk Production ◽  
Heat Tolerance ◽  
Rectal Temperature ◽  
Weather Factors ◽  
And Performance ◽  
Very High ◽  
Selection Of ◽  
Holstein Dairy Cows

Milk production is significantly decreased by thermal stress. The survival and performance of an animal during heat stress periods depend on several weather factors, especially temperature and humidity. Researchers reported dramatic decreases in milk production as temperature rose above 30 degree of centigrade. Very high environmental temperature is common during the summer months in Iran. Rectal temperature is as indicator of heat tolerance and has been the most frequently used physiological variable for estimating heat tolerance in cattle. Some dairy cows are more heat tolerant and productive when subjected to heat stress. Identification and selection of heat stress resistant cattle offers the potential to increase milk yield in tropical environment. The aim of the present study was to estimate genetic parameters of heat tolerance and its relationship to milk production in Holstein Dairy Cows in Iran.

The effect of perennial ryegrass ploidy and white clover inclusion on milk production of dairy cows

2020 ◽  
Vol 60 (1) ◽  
pp. 143 ◽  
Author(s):  
Bríd McClearn ◽  
Trevor Gilliland ◽  
Clare Guy ◽  
Michael Dineen ◽  
Fergal Coughlan ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Perennial Ryegrass ◽  
White Clover ◽  
Application Rate ◽  
Dairy Farmers ◽  
Increase Milk Production ◽  
Grazing Systems ◽  
Fertiliser Application ◽  
Grazing Dairy Cows

Grazed grass is considered the cheapest feed available for dairy cows in temperate regions, and to maximise profits, dairy farmers must utilise this high-quality feed where possible. Recent research has reported that including white clover (Trifolium repens L.) in grass swards can have a positive effect on milk production. The aim of the present study was to quantify the effect of tetraploid and diploid perennial ryegrass (Lolium perenne L.; PRG) swards sown with and without white clover on the milk production of grazing dairy cows. Four grazing treatments were used for the study; tetraploid-only PRG swards, diploid-only PRG swards, tetraploid PRG with white clover swards and diploid PRG with white clover swards. Thirty cows were assigned to each treatment and swards were rotationally grazed at a stocking rate of 2.75 cows/ha and a nitrogen-fertiliser application rate of 250 kg/ha annually. There was no significant effect of ploidy on milk production. Over the present 4-year study, cows grazing the PRG–white clover treatments had greater milk yields (+597 kg/cow.year) and milk-solid yield (+48 kg/cow.year) than cows grazing the PRG-only treatments. This significant increase in milk production suggests that the inclusion of white clover in grazing systems can be effectively used to increase milk production of grazing dairy cows.

Feeding diets with fodder beet decreased methane emissions from dry and lactating dairy cows in grazing systems

2017 ◽  
Vol 57 (7) ◽  
pp. 1445 ◽  
Author(s):  
Arjan Jonker ◽  
David Scobie ◽  
Robyn Dynes ◽  
Grant Edwards ◽  
Cecile De Klein ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Perennial Ryegrass ◽  
Pastoral Systems ◽  
Hordeum Vulgare L ◽  
Fodder Beet ◽  
Ch4 Emissions ◽  
Lactating Cows ◽  
Carbohydrate Concentration ◽  
Lactating Dairy Cows

Fodder beet (Beta vulgaris L.) has a very high readily fermentable carbohydrate concentration, which could affect rumen fermentation and reduce enteric methane (CH4) emissions. The objective of the current study was to estimate CH4 emissions from dry dairy cows grazing either fodder beet supplemented with perennial ryegrass (Lolium perenne L.)-dominated pasture silage (6 kg DM/cow/day; FB+Sil) or forage kale (Brassica oleracea L.) supplemented with barley (Hordeum vulgare L.) straw (3 kg DM/cow/day; kale+Str; dry cows, Experiment 1), and from dairy cows in early lactation grazing perennial ryegrass-dominated pasture alone (pasture) or supplemented with fodder beet bulbs (3 kg DM/cow/day; past+FB; lactating cows; Experiment 2). Methane measurements were performed using GreenFeed units (C-Lock Inc., Rapid City, SD, USA) for 40 days in August–September 2015 (Experiment 1) and for 22 days in November–December 2015 (Experiment 2), from 45 and 31 Holstein–Friesian × Jersey dairy cows in Experiments 1 and 2, respectively. Dry cows grazing FB+Sil in Experiment 1 produced 18% less CH4 (g/day) and had 28% lower CH4 yield (g/kg DM intake; P < 0.001) than did cows grazing kale+Str. Lactating cows grazing past+FB in Experiment 2 produced 18% less CH4 and had 16% lower CH4 intensity (g/kg fat and protein-corrected milk production; P < 0.01) than did cows grazing pasture alone, while milk production and composition were similar for the two groups. In conclusion, feeding fodder beet at ~50% and 20% of the diet of dry and lactating dairy cows in pastoral systems can mitigate CH4 emissions.

The effects of wilting of grass prior to ensiling on the response to bacterial inoculation. 2. Intake and performance by dairy cattle over three harvests

1996 ◽  
Vol 62 (3) ◽  
pp. 419-429 ◽  
Author(s):  
D. C. Patterson ◽  
T. Yan ◽  
F. J. Gordon
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Period Change ◽  
Design Experiment ◽  
Bacterial Inoculation ◽  
Reduced Fat ◽  
Bean Meal ◽  
Fat Yield ◽  
And Performance ◽  
Soya Bean Meal

AbstractFour silages (unwilted with and without inoculant, and wilted with and without inoculant) were prepared from perennial ryegrass swards at each of three harvests over the growing season. The four silages from each of the first (primary growth), second (first regrowth) and third (second regrowth) harvests were offered ad libitum to 48 dairy cows during periods 2, 1 and 3 respectively, in a two (control and additive) × two (unwilted and wilted) × three (harvest (period)) change-over design experiment with 8-week experimental periods. The animals also received a concentrate supplement at 7·0, 6·1 and 5·2 kg dry matter (DM) per day in the first, second and third periods respectively. The supplement was based on barley, molasses and soya-bean meal.There were significant interactions between inoculation and wilting across the three harvests on silage DM intake (F<0-01), milk yield (P<0·05), and outputs of fat (P<0·01) and protein (P<0·05). Inoculation had no significant effects on silage intake and milk production across the unwilted and wilted silages. However, within the unwilted silages, inoculation significantly increased silage DM intake by 0·46 kg/day (P < 0·05) and fat yield by 0·032 kg/day (P<0·05). In contrast, within the wilted silages inoculation significantly reduced fat yield by 0·030 kg/day (P < 0·05). Wilting of grass prior to ensiling significantly increased silage DM intake by 0·73 kg/day (P <0·001), milk yield by 0·42 kg/day (P<0·05), fat yield by 0·053 kg/day (P < 0·001) and protein yield by 0·047 kg/day (P < 0·001) across the inoculant-treated and untreated silages. The effects however were mainly derived from the untreated silages as within the inoculant-treated materials the differences in silage intake and milk yield were not significant between unwilted and wilted treatments. The results of the current experiment indicate that wilting with no additive significantly improved silage intake and milk production, but otherwise the improvement was reduced with wilting following inoculation. Inoculation significantly increased silage intake and fat yield when used with the unwilted grass, but it significantly reduced fat yield when used with the wilted grass.

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