Effects of dietary substitution of maize silage by amaranth silage on feed intake, digestibility, microbial nitrogen, blood parameters, milk production and nitrogen retention in lactating Holstein cows

Abstract To determine the effect of Certillus on milk production, milk components and feed efficiency, primiparous (n = 13) and multiparous (n = 12) Holstein cows were assigned to one of two dietary groups starting from 8 to 120 days of lactation. The controls (n = 13) received regular TMR ration, and treated cows (n =12) received control TMR plus 2 x 109 cfu/head of Certillus (Church & Dwight Co., Inc., Waukesha, WI). Cows were housed in an open-air free-stall barn with 16 Insentec electronic feeders (8 feeders/group) to record daily feed events and intake (DMI). Cows were provided with ad libitum TMR fed twice daily and were milked twice daily. Milk samples were taken weekly during successive a.m./p.m. milkings and analyzed for percentage milk fat, protein, lactose, and milk urea nitrogen (MUN). Data were analyzed using a repeated-measures 2 x 2 factorial ANOVA. Daily milk production (4%FCM) was influenced (P < 0.05) by treatment x parity, week and parity, averaging 11% greater (P < 0.05) in Certillus-fed than control cows. Milk fat percentage increased (P < 0.005) from 4.02 to 4.41 + 0.09% with Certillus feeding. Milk lactose was influenced (P < 0.05) by week and treatment x parity. Milk protein was affected by week (P < 0.001) only. Certillus decreased (P < 0.05) MUN levels such that MUN was 1.0 mg/dL greater (P < 0.001) in Certillus-fed than control cows. Feed intake was reduced by 9% (P < 0.01) and feed efficiency (kg 4%FCM/kg DMI) was improved by 14% (P < 0.05) in Certillus-fed versus control cows. We conclude that Certillus may hold potential as an effective direct-fed microbial to increase feed efficiency and milk production.

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Influence of Dry Period Diet on Early Postpartum Health, Feed Intake, Milk Production, and Reproductive Efficiency of Holstein Cows

Journal of Dairy Science ◽

10.3168/jds.s0022-0302(81)82566-0 ◽

1981 ◽

Vol 64 (2) ◽

pp. 290-295 ◽

Cited By ~ 44

Author(s):

D.G. Johnson ◽

D.E. Otterby

Keyword(s):

Milk Production ◽

Feed Intake ◽

Holstein Cows ◽

Reproductive Efficiency ◽

Dry Period ◽

Postpartum Health ◽

Early Postpartum

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Nutritional Studies to Evaluate the Productivity and Quality of Preserved New Variety of Hybride Maize Silage on : 1- Milk Production and Its Composition,Some Rumen and Blood Parameters, Feed Utilization and Economical Efficiency in Lactating Zaribi Goats .

Journal of Animal and Poultry Production ◽

10.21608/jappmu.2016.48751 ◽

2016 ◽

Vol 7 (11) ◽

pp. 423-431

Author(s):

M. Saleh

Keyword(s):

Milk Production ◽

Blood Parameters ◽

Feed Utilization ◽

Maize Silage ◽

New Variety ◽

Economical Efficiency ◽

Nutritional Studies

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Productivity and physiological response of lactating Holstein cows to sugarcane supplementation and evaporative cooling under heat-stress

The Journal of Agricultural Science ◽

10.1017/s0021859618000898 ◽

2018 ◽

Vol 156 (7) ◽

pp. 900-913

Author(s):

F. P. Campos ◽

M. R. G. Conceição ◽

P. Sarmento ◽

D. R. O. Nicácio ◽

C. G. Lima ◽

...

Keyword(s):

Milk Production ◽

Environmental Conditions ◽

Cooling System ◽

Latin Square ◽

Milk Composition ◽

Holstein Cows ◽

Maize Silage ◽

N Efficiency ◽

Humidity Index ◽

Body Surface Temperature

AbstractThe objective of the current study was to evaluate the effects of sugarcane and maize silage mixturev.maize silage in diets of Holstein cows and investigate performance under two environmental conditions. The cows were placed in freestalls, with individuals and stalls assigned to one of four treatments according to a replicated 4 × 4 Latin square design with 20-day periods divided into 11 days of adaptation (wash-out period) and 9 days of collection. Treatments were arranged in a 2 × 2 × 2 factorial design: total diets (maize silage (MS-based diet), the roughage mixture (RM-based diet, sugarcane : maize silage, 500 : 500 g/kg DM) plus concentrate); environmental conditions (with (W) and without (Wo) fan and nebulizers); and measurement times (09.40 and 14.00 h). The temperature and relative humidity was higher at 14.00 h and contributed to increased temperature-humidity index (76.6, Wv.75.9, Wo). Feed dry matter intake (DMI) was similar between diets (20.2 kg/day), but milk production and feed efficiency were lower with RM. Under W conditions, higher fat content and total solids of milk were observed with the RM-based diet, while crude protein and lactose were higher with MS. The Wo conditions increased body surface temperature (BS) in cows fed MS. The rectal temperature (RT) was higher with RM. The BS, RT and respiratory rate were higher at 14.00 h (34.9, 38.6 °C and 58.2 breaths/min) than at 09.40 h. The RM-based diet maintained DMI and milk composition, but not milk production. The use of the cooling system led to higher DMI and feed N efficiency use.

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