Tags

Type your tag names separated by a space and hit enter

Utilization of kura clover-reed canarygrass silage versus alfalfa silage by lactating dairy cows.
J Dairy Sci. 2008 Aug; 91(8):3138-44.JD

Abstract

The mixture of kura clover (Trifolium ambiguum M. Bieb.) and reed canarygrass (Phalaris arundinacea L.) has proven to be extremely persistent in the northern United States, but information about dairy cow performance on this mixture is lacking. Twenty lactating Holstein cows were used in a crossover design to compare dry matter (DM) intake and milk production from diets containing kura clover-reed canarygrass silage (KRS) or alfalfa (Medicago sativa L.) silage (AS). Forages were cut, wilted, ensiled in horizontal plastic bags, and allowed to ferment for at least 50 d before beginning the feeding experiment. The KRS was approximately 40% kura clover and 60% reed canarygrass. Treatments were total mixed rations formulated with either 57% of total DM from 1) AS or 2) KRS. Experimental periods were 28 d, with the first 14 d for diet adaptation and the last 14 d for measurement of intake and milk production. The neutral detergent fiber (NDF) concentrations of AS and KRS were 37.3 and 47.3%, respectively. The fermentation analyses indicated that both silages underwent a restricted fermentation, producing primarily lactic acid and some acetic acid. Dry matter intake (24.2 vs. 22.8 kg) and 4% fat-corrected milk (32.8 vs. 30.9 kg) were significantly higher for cows fed AS than for cows fed KRS. Cows consumed less NDF (6.7 vs. 8.0 kg) and less digestible NDF (3.0 vs. 4.4 kg) when fed AS diets compared with KRS diets, but the pool of ruminally undegraded NDF was similar (3.7 kg) between diets. Cows produced 1.5 kg of milk/kg of DM consumed regardless of the diet, indicating that digestible NDF of KRS was utilized with similar efficiency as the cell wall constituents of AS, but the intake of cows fed KRS may have been limited by rumen fill. Milk fat concentration tended to be higher for cows fed AS, but the milk true protein concentration and yields of fat and protein did not differ by treatment. Milk urea nitrogen content was higher when cows consumed AS (16.4 mg/ dL) compared with KRS (13.4 mg/dL). The cows fed KRS consumed more NDF but less total DMI, based on the results from this trial with diets formulated to contain approximately 60% of DM as forage, resulting in slightly lower milk yields than cows fed excellent-quality AS. This grass-legume mixture has the potential to be a source of quality forage for dairy cows in regions where alfalfa persistence is a problem.

Authors+Show Affiliations

Department of Dairy Science, University of Wisconsin, Madison, Wisconsin 53706, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

18650290

Citation

Kammes, K L., et al. "Utilization of Kura Clover-reed Canarygrass Silage Versus Alfalfa Silage By Lactating Dairy Cows." Journal of Dairy Science, vol. 91, no. 8, 2008, pp. 3138-44.
Kammes KL, Heemink GB, Albrecht KA, et al. Utilization of kura clover-reed canarygrass silage versus alfalfa silage by lactating dairy cows. J Dairy Sci. 2008;91(8):3138-44.
Kammes, K. L., Heemink, G. B., Albrecht, K. A., & Combs, D. K. (2008). Utilization of kura clover-reed canarygrass silage versus alfalfa silage by lactating dairy cows. Journal of Dairy Science, 91(8), 3138-44. https://doi.org/10.3168/jds.2007-0865
Kammes KL, et al. Utilization of Kura Clover-reed Canarygrass Silage Versus Alfalfa Silage By Lactating Dairy Cows. J Dairy Sci. 2008;91(8):3138-44. PubMed PMID: 18650290.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Utilization of kura clover-reed canarygrass silage versus alfalfa silage by lactating dairy cows. AU - Kammes,K L, AU - Heemink,G B H, AU - Albrecht,K A, AU - Combs,D K, PY - 2008/7/25/pubmed PY - 2008/12/20/medline PY - 2008/7/25/entrez SP - 3138 EP - 44 JF - Journal of dairy science JO - J Dairy Sci VL - 91 IS - 8 N2 - The mixture of kura clover (Trifolium ambiguum M. Bieb.) and reed canarygrass (Phalaris arundinacea L.) has proven to be extremely persistent in the northern United States, but information about dairy cow performance on this mixture is lacking. Twenty lactating Holstein cows were used in a crossover design to compare dry matter (DM) intake and milk production from diets containing kura clover-reed canarygrass silage (KRS) or alfalfa (Medicago sativa L.) silage (AS). Forages were cut, wilted, ensiled in horizontal plastic bags, and allowed to ferment for at least 50 d before beginning the feeding experiment. The KRS was approximately 40% kura clover and 60% reed canarygrass. Treatments were total mixed rations formulated with either 57% of total DM from 1) AS or 2) KRS. Experimental periods were 28 d, with the first 14 d for diet adaptation and the last 14 d for measurement of intake and milk production. The neutral detergent fiber (NDF) concentrations of AS and KRS were 37.3 and 47.3%, respectively. The fermentation analyses indicated that both silages underwent a restricted fermentation, producing primarily lactic acid and some acetic acid. Dry matter intake (24.2 vs. 22.8 kg) and 4% fat-corrected milk (32.8 vs. 30.9 kg) were significantly higher for cows fed AS than for cows fed KRS. Cows consumed less NDF (6.7 vs. 8.0 kg) and less digestible NDF (3.0 vs. 4.4 kg) when fed AS diets compared with KRS diets, but the pool of ruminally undegraded NDF was similar (3.7 kg) between diets. Cows produced 1.5 kg of milk/kg of DM consumed regardless of the diet, indicating that digestible NDF of KRS was utilized with similar efficiency as the cell wall constituents of AS, but the intake of cows fed KRS may have been limited by rumen fill. Milk fat concentration tended to be higher for cows fed AS, but the milk true protein concentration and yields of fat and protein did not differ by treatment. Milk urea nitrogen content was higher when cows consumed AS (16.4 mg/ dL) compared with KRS (13.4 mg/dL). The cows fed KRS consumed more NDF but less total DMI, based on the results from this trial with diets formulated to contain approximately 60% of DM as forage, resulting in slightly lower milk yields than cows fed excellent-quality AS. This grass-legume mixture has the potential to be a source of quality forage for dairy cows in regions where alfalfa persistence is a problem. SN - 1525-3198 UR - https://www.unboundmedicine.com/medline/citation/18650290/Utilization_of_kura_clover_reed_canarygrass_silage_versus_alfalfa_silage_by_lactating_dairy_cows_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022-0302(08)71109-3 DB - PRIME DP - Unbound Medicine ER -