State and National Standardized Lactation Averages by Breed

AIPL RESEARCH REPORT
K2-05 (2-07)

State and National Standardized Lactation Averages by Breed for Cows Calving in 2005

H.D. Norman and L.L.M. Thornton
Animal Improvement Programs Laboratory, ARS-USDA, Beltsville, MD 20705-2350
301-504-8334 (voice) ~ 301-504-8092 (fax) ~ inquiry@aipl.arsusda.gov ~ http://aipl.arsusda.gov

Lactation yields are often standardized to provide a reasonably equitable comparison of dairy cows having different lactation characteristics (i.e., age at calving, days milked, milking frequency, etc.). Average of standardized yield is compared in this report for each State and the nation for calvings in 2005 by breed. The data available originated in herds enrolled in the Dairy Herd Improvement (DHI) Program. The test-day data, used by the Animal Improvement Programs Laboratory to determine lactation records, are processed and provided by the dairy records processing centers (DRPC). DHI participation and DRPC activity have also been summarized using the same data source.

Only data used in calculation of national genetic evaluations are included in these State and national averages. Thus, records beyond fifth lactation or by cows that lacked either a first lactation record or lacked valid sire identification were excluded. For other editing requirements, see complete evaluation documentation.

Lactation records were calculated using the best prediction method starting in 1997 and were standardized for age-parity, calving month, previous days open, and times milked per day. Records shorter than 305 days were extended to 305 days as part of the best prediction process. Prior to 1997 the records were calculated using the test interval method. This change was responsible for a portion of the increases in yields observed between 1996 and 1997 because the current method gives a more favorable prediction for the lower producing cows. Protein testing for records contributing to genetic evaluations is 97 to 100% except in California (89% for Guernseys and Holsteins, and 85% for Red and Whites) and Nevada (75% for Holsteins). Component percentages were computed from averages of standardized yields for milk and components.

Numbers of records and averages for yields and component percentages are in Tables 1 through 7 by State for Ayrshires, Brown Swiss, Guernseys, Holsteins, Jerseys, Milking Shorthorns, and Red and Whites, respectively. Numbers of records and national averages for milk and component yields and component percentages are in Tables 8A-8F by breed for selected years.

Breed yields are different between this report and the herd-average report because this report summarizes standardized lactation yield, whereas the herd-average report is determined from actual herd yields. Records contributing to the herd-average reports are not restricted to those usable for national genetic evaluations. Herd-average report is impacted also by the length of dry period. Relative yields among breeds differ between the two reports because of large breed differences in percentage of usable records and differences in age-parity factors. Also, the herd-average reports tend to be more current (about 6 mo) than the standardized yield reports published at the same time.

Ayrshire calvings were down 3.2% from last year Tables 8A. Calvings for Guernsey and Red and Whites declined also in 2005, dropping 3.5 and 4.4%, respectively from the previous year. Brown Swiss, Holstein, and Jersey calvings were up from last year, increasing by 1.6, 3.3 and 5.7%, respectively.

Milk yield increased for all breeds ranging from 1.8% for Milking Shorthorn to 3.1% for Brown Swiss. Both Holsteins and Jerseys showed an increase of 2.0%. Fat % were unchanged for Guernesy and Red and Whites, showed a 0.01% increase for Brown Swiss, Holstein, and Milking Shorthorn, and a 0.02% increase for Ayrshire and Jerseys. Breed fat yield increased from 2.3 to 3.4%. Protein percentage was lower by 0.01 to 0.02 % for 4 breeds, remained the same for Jersey and Milking Shorthorn, and increased by 0.01 for Red and Whites. Increases in breed average protein yield ranged from 1.9 to 2.8%. While feed availability and operating costs, milk and beef prices, Government programs, and characteristics of herds entering and leaving eligible testing programs can affect production averages in either direction, genetic change continues to have a positive effect on yield. The leveling off of average yields most likely reflects changes in management strategies due to feed availability and somewhat more emphasis on other traits such as health and longevity. For instance, average somatic cell count during 2005 dropped considerably from 2004 (Herd somatic cell count report). Interpretation of trends in lactation averages should be made in view of other changes affecting profitability, and will be impacted by changes in number of records across years as well.

DHI Lactation Averages for Ayrshire

Table 1. Ayrshire State and National Standardized Lactation Averages for Cows Calving in 2005 With Records
Used in National Genetic Evaluations.

	Records	Milk	Fat		Protein
State	(no.)	(lb)	(%)	(lb)	(%)	(lb)	Reporting
Alabama	3	16,719	3.42	572	3.04	509	100
Arkansas	27	18,123	3.99	723	3.11	564	100
California	21	23,577	3.81	898	3.13	737	100
Colorado	3	22,231	3.57	793	3.09	687	100
Connecticut	124	18,979	3.95	749	3.23	614	100
Delaware	2	19,236	4.02	774	3.24	623	100
Florida	3	15,389	3.43	528	3.06	471	100
Illinois	214	18,279	3.71	679	3.12	571	100
Indiana	62	16,550	3.84	636	3.14	520	100
Iowa	532	20,540	3.80	780	3.13	643	100
Kansas	70	16,866	3.62	611	3.19	538	100
Kentucky	62	14,257	3.62	516	3.17	453	100
Louisiana	13	15,664	3.79	594	3.23	506	100
Maine	119	17,078	3.74	639	3.03	517	100
Maryland	329	20,145	3.87	780	3.09	623	100
Massachusetts	28	18,102	4.02	728	3.23	585	100
Michigan	48	19,961	3.88	775	3.12	623	100
Minnesota	165	17,322	3.86	669	3.08	533	100
Missouri	85	16,831	3.92	659	3.18	534	100
Nebraska	69	16,729	3.73	624	3.21	536	100
New Hampshire	141	19,027	3.85	732	3.09	588	100
New Jersey	6	15,443	4.17	644	3.12	482	100
New Mexico	198	14,823	3.79	562	3.11	461	100
New York	1,103	17,915	3.82	685	3.09	553	100
North Carolina	72	13,839	4.18	579	3.10	428	100
Ohio	406	19,081	3.83	731	3.11	594	100
Oklahoma	94	21,831	3.46	756	3.09	676	100
Oregon	37	16,951	3.77	640	3.12	530	100
Pennsylvania	864	18,760	3.87	725	3.13	588	100
Rhode Island	26	16,828	4.00	673	3.19	537	100
South Carolina	8	20,416	3.83	782	3.15	643	100
Tennessee	30	15,382	3.67	565	3.11	479	100
Texas	73	18,847	3.92	738	3.29	620	100
Utah	24	13,741	3.90	536	3.26	448	100
Vermont	365	17,727	3.84	681	3.14	556	100
Virginia	35	17,062	3.63	619	3.10	530	100
Washington	13	18,773	3.60	675	3.23	606	100
West Virginia	28	17,642	3.84	677	3.15	556	100
Wisconsin	487	17,862	3.82	681	3.10	554	100
US	5,989	18,303	3.82	700	3.12	571	100

 Return to the AIPL Home page

DHI Lactation Averages for Brown Swiss

Table 2. Brown Swiss State and National Standardized Lactation Averages for Cows Calving in 2005 With Records
Used in National Genetic Evaluations.

	Records	Milk	Fat		Protein
State	(no.)	(lb)	(%)	(lb)	(%)	(lb)	Reporting
Alabama	6	19,328	3.80	734	3.18	615	100
Arizona	106	22,357	3.86	863	3.20	715	100
Arkansas	120	18,916	3.71	703	3.30	624	100
California	437	21,821	3.92	855	3.32	723	98
Colorado	90	21,899	4.20	920	3.38	740	100
Connecticut	49	20,231	3.88	785	3.27	662	100
Delaware	4	20,771	4.19	871	3.42	710	100
Florida	16	19,768	3.76	743	3.20	633	100
Georgia	79	19,284	3.97	765	3.30	636	100
Idaho	198	21,526	3.97	855	3.41	734	100
Illinois	618	21,910	4.01	879	3.31	724	100
Indiana	486	23,303	4.09	953	3.32	774	100
Iowa	1,460	22,233	4.00	889	3.31	737	100
Kansas	213	22,734	3.80	864	3.34	759	100
Kentucky	133	19,697	3.71	732	3.29	648	100
Louisiana	40	16,374	3.62	593	3.23	529	100
Maine	30	16,203	3.83	621	3.27	529	100
Maryland	366	21,901	4.02	881	3.28	718	100
Massachusetts	115	22,332	3.85	861	3.31	740	100
Michigan	316	24,516	3.97	972	3.27	801	100
Minnesota	1,294	21,432	4.06	870	3.28	703	100
Mississippi	12	17,062	3.83	653	3.16	539	100
Missouri	382	20,629	4.00	826	3.33	686	100
Montana	2	19,025	4.10	781	3.50	667	100
Nebraska	166	21,732	4.00	869	3.29	714	100
Nevada	1	23,445	4.59	1076	3.25	762	100
New Hampshire	114	18,861	4.02	758	3.29	620	100
New Jersey	5	26,809	4.62	1239	3.26	874	100
New Mexico	8	22,205	4.17	926	3.33	739	100
New York	1,001	20,435	4.01	820	3.29	672	100
North Carolina	64	20,239	3.95	799	3.28	664	100
North Dakota	74	18,854	3.91	737	3.34	629	100
Ohio	1,482	21,647	3.96	858	3.30	713	100
Oklahoma	97	18,224	3.70	674	3.31	602	100
Oregon	200	21,975	4.01	882	3.32	740	97
Pennsylvania	1,291	21,214	3.98	845	3.29	698	100
Puerto Rico	45	14,333	3.17	454	3.33	477	100
South Carolina	22	21,758	3.67	798	3.10	675	100
South Dakota	196	19,126	4.39	840	3.41	653	100
Tennessee	256	17,644	4.18	737	3.31	585	100
Texas	455	20,394	3.97	810	3.32	677	100
Utah	83	18,142	4.17	756	3.36	610	100
Vermont	346	20,071	4.15	832	3.37	677	100
Virginia	147	23,268	3.83	891	3.27	761	100
Washington	236	20,645	3.91	807	3.41	705	100
West Virginia	10	16,810	3.98	669	3.30	554	100
Wisconsin	3,158	21,879	4.02	880	3.29	719	100
US	16,029	21,405	4.00	856	3.30	707	>99

 Return to the AIPL Home page

DHI Lactation Averages for Guernsey

Table 3. Guernsey State and National Standardized Lactation Averages for Cows Calving in 2005 With Records
Used in National Genetic Evaluations.

	Records	Milk	Fat		Protein
State	(no.)	(lb)	(%)	(lb)	(%)	(lb)	Reporting
Alabama	1	14,495	3.79	549	3.34	484	100
Arizona	20	18,481	3.86	713	3.20	591	100
Arkansas	7	17,127	4.37	749	3.29	563	100
California	397	18,682	4.33	808	3.34	638	89
Connecticut	52	16,973	4.39	744	3.30	560	100
Delaware	1	18,573	4.51	837	3.19	593	100
Florida	5	18,449	4.14	763	3.10	572	100
Georgia	7	15,721	3.58	564	3.26	513	100
Idaho	22	15,590	4.32	674	3.31	515	100
Illinois	164	17,749	4.38	778	3.16	561	100
Indiana	305	17,389	4.34	755	3.28	571	100
Iowa	558	18,770	4.41	829	3.26	612	100
Kansas	49	16,957	4.59	778	3.38	573	100
Kentucky	17	18,123	4.11	745	3.28	594	100
Louisiana	32	14,402	4.45	641	3.47	500	100
Maine	31	15,370	4.59	706	3.35	515	100
Maryland	328	16,865	4.52	763	3.31	559	100
Massachusetts	12	16,107	4.49	723	3.32	534	100
Michigan	24	15,670	4.06	636	3.10	487	100
Minnesota	377	15,415	4.47	689	3.25	501	100
Missouri	313	16,027	4.34	696	3.31	531	100
Nebraska	75	18,640	4.50	840	3.24	604	100
New Hampshire	9	15,523	4.44	690	3.31	513	100
New Jersey	3	20,285	4.76	966	3.26	660	100
New York	583	16,779	4.49	754	3.24	543	100
North Carolina	45	16,948	4.38	742	3.21	543	100
Ohio	304	17,226	4.48	771	3.33	573	100
Oklahoma	46	16,396	3.86	633	3.24	531	100
Oregon	336	18,425	4.41	812	3.27	602	100
Pennsylvania	710	16,650	4.37	728	3.24	540	100
South Carolina	50	14,943	4.49	671	3.25	485	100
South Dakota	45	12,698	4.47	567	3.23	410	100
Tennessee	98	17,158	4.23	725	3.19	547	100
Texas	116	16,432	4.03	663	3.21	527	100
Utah	2	18,330	4.15	762	3.18	582	100
Vermont	155	15,568	4.49	699	3.28	510	100
Virginia	97	16,262	4.46	726	3.24	527	100
Washington	111	16,364	4.60	753	3.40	556	100
West Virginia	11	15,794	4.67	738	3.53	558	100
Wisconsin	1,730	17,458	4.47	781	3.26	569	100
US	7,248	17,154	4.42	758	3.27	561	99

 Return to the AIPL Home page

DHI Lactation Averages for Holstein

Table 4. Holstein State and National Standardized Lactation Averages for Cows Calving in 2005 With Records
Used in National Genetic Evaluations.

	Records	Milk	Fat		Protein
State	(no.)	(lb)	(%)	(lb)	(%)	(lb)	Reporting
Alabama	929	22,203	3.32	738	2.99	665	100
Arizona	19,492	24,972	3.44	859	2.98	743	100
Arkansas	1,517	22,132	3.48	769	3.01	667	100
California	361561	26,406	3.61	953	3.06	808	89
Colorado	11,874	26,360	3.61	952	3.06	807	>99
Connecticut	6,478	24,664	3.64	898	3.04	749	100
Delaware	2,401	24,816	3.72	924	3.01	746	100
Florida	7,436	24,139	3.61	873	3.00	724	100
Georgia	8,398	23,035	3.55	818	3.00	692	100
Idaho	44,705	26,621	3.62	964	3.05	812	>99
Illinois	24,506	25,394	3.65	928	2.99	759	100
Indiana	16,309	24,959	3.73	931	2.98	744	>99
Iowa	44,247	25,646	3.66	938	3.02	774	>99
Kansas	11,152	24,754	3.67	908	3.04	753	>99
Kentucky	6,815	23,636	3.59	849	3.02	713	100
Louisiana	2,614	20,423	3.50	715	2.98	609	100
Maine	6,038	24,402	3.70	903	3.01	735	100
Maryland	19,818	24,092	3.76	905	3.02	728	>99
Massachusetts	4,875	25,415	3.68	935	3.04	773	100
Michigan	60,251	27,201	3.73	1014	2.95	801	>99
Minnesota	120970	24,929	3.69	919	2.99	745	>99
Mississippi	2,619	23,708	3.59	850	2.92	691	100
Missouri	10,888	22,805	3.60	821	3.03	690	100
Montana	2,415	25,496	3.57	910	2.97	756	100
Nebraska	9,932	24,848	3.63	903	3.02	750	100
Nevada	3,980	26,992	3.53	952	3.09	829	75
New Hampshire	5,814	26,127	3.70	967	3.04	793	100
New Jersey	3,861	24,634	3.72	916	2.99	736	100
New Mexico	13,239	25,466	3.53	898	3.04	774	>99
New York	168797	25,006	3.69	924	3.00	751	>99
North Carolina	11,257	24,454	3.56	870	2.99	731	100
North Dakota	2,645	24,921	3.71	925	3.00	748	100
Ohio	44,310	25,069	3.67	921	3.00	751	>99
Oklahoma	3,824	23,254	3.37	783	3.01	699	100
Oregon	17,468	25,571	3.74	957	3.05	781	>99
Pennsylvania	168976	25,207	3.63	915	3.00	755	>99
Puerto Rico	1,920	14,573	3.22	469	3.08	449	100
Rhode Island	105	25,571	3.64	931	3.04	777	100
South Carolina	4,597	24,188	3.51	849	2.98	720	100
South Dakota	7,470	24,634	3.71	913	3.00	739	100
Tennessee	7,790	23,254	3.65	849	2.96	688	100
Texas	20,469	23,970	3.72	891	3.08	738	100
Utah	13,546	25,959	3.61	936	3.01	783	100
Vermont	25,663	25,287	3.69	933	3.05	771	100
Virginia	32,938	24,589	3.58	879	2.97	731	100
Washington	33,082	26,325	3.66	963	3.03	796	>99
West Virginia	2,733	23,313	3.62	845	3.01	701	100
Wisconsin	246875	26,486	3.68	976	2.98	790	>99
Wyoming	402	28,282	3.69	1044	2.85	807	100
US	1.65E6	25,644	3.65	936	3.01	772	97

 Return to the AIPL Home page

DHI Lactation Averages for Jersey

Table 5. Jersey State and National Standardized Lactation Averages for Cows Calving in 2005 With Records
Used in National Genetic Evaluations.

	Records	Milk	Fat		Protein
State	(no.)	(lb)	(%)	(lb)	(%)	(lb)	Reporting
Alabama	1,743	16,277	4.54	739	3.59	584	100
Arizona	5,859	18,118	4.54	823	3.46	627	100
Arkansas	137	16,244	4.45	722	3.45	561	100
California	41,612	19,254	4.63	892	3.60	694	99
Colorado	274	19,003	4.37	831	3.51	668	>99
Connecticut	440	16,972	4.66	791	3.56	604	100
Delaware	57	20,436	4.83	988	3.37	689	100
Florida	167	16,913	4.39	742	3.44	581	100
Georgia	417	15,259	4.31	657	3.52	537	100
Idaho	3,629	18,123	4.78	866	3.70	671	100
Illinois	1,269	17,040	4.57	779	3.56	607	>99
Indiana	1,131	17,318	4.64	804	3.59	621	100
Iowa	3,180	18,153	4.67	847	3.57	649	100
Kansas	1,114	18,063	4.45	804	3.53	638	100
Kentucky	1,015	15,540	4.40	684	3.54	550	100
Louisiana	304	14,970	4.07	609	3.44	515	100
Maine	615	16,925	4.69	794	3.50	593	100
Maryland	1,014	17,699	4.74	839	3.59	635	100
Massachusetts	701	17,173	4.68	804	3.59	617	100
Michigan	1,083	16,954	4.74	803	3.62	613	100
Minnesota	2,290	16,491	4.64	766	3.53	583	100
Mississippi	538	16,967	4.36	740	3.45	585	100
Missouri	1,538	16,089	4.50	724	3.55	572	100
Montana	5	19,048	4.60	876	3.56	679	100
Nebraska	361	19,889	4.44	884	3.56	709	100
Nevada	333	17,958	4.59	825	3.50	628	100
New Hampshire	513	17,969	4.64	834	3.58	644	100
New Jersey	71	16,552	4.93	816	3.57	591	100
New Mexico	1,298	17,650	4.70	830	3.54	625	>99
New York	5,649	17,742	4.64	823	3.53	626	100
North Carolina	2,237	19,099	4.40	840	3.52	672	100
North Dakota	63	15,922	4.54	723	3.61	575	100
Ohio	6,944	17,817	4.70	838	3.59	640	100
Oklahoma	625	16,986	4.31	732	3.51	596	100
Oregon	7,867	18,215	4.64	845	3.59	653	100
Pennsylvania	6,980	17,175	4.64	797	3.53	606	>99
Puerto Rico	32	12,874	3.32	427	3.56	458	100
Rhode Island	6	18,398	4.58	843	3.61	664	100
South Carolina	2,064	17,818	4.61	821	3.48	621	100
South Dakota	448	17,930	4.88	875	3.54	634	100
Tennessee	2,041	16,773	4.53	760	3.50	586	>99
Texas	5,307	16,151	4.54	733	3.57	576	100
Utah	1,185	18,047	4.49	810	3.59	648	100
Vermont	2,584	16,187	4.67	756	3.58	580	100
Virginia	1,092	17,600	4.48	789	3.53	621	100
Washington	2,268	17,620	4.52	797	3.60	635	100
West Virginia	270	18,787	4.43	832	3.67	690	100
Wisconsin	7,866	18,066	4.67	843	3.55	641	100
US	128236	18,087	4.62	835	3.57	646	>99

 Return to the AIPL Home page

DHI Lactation Averages for Milking Shorthorn

Table 6. Milking Shorthorn State and National Standardized Lactation Averages for Cows Calving in 2005 With
Records Used in National Genetic Evaluations.

	Records	Milk	Fat		Protein
State	(no.)	(lb)	(%)	(lb)	(%)	(lb)	Reporting
Arizona	238	13,658	3.47	473	3.04	415	100
Arkansas	63	20,665	3.86	797	3.15	651	100
California	173	17,997	3.45	621	3.07	552	99
Colorado	5	21,868	4.24	926	3.38	740	100
Connecticut	7	16,026	3.77	605	3.03	486	100
Idaho	90	19,271	3.50	675	3.11	598	100
Illinois	38	18,089	3.58	648	3.11	563	100
Indiana	39	16,843	3.56	600	2.99	503	100
Iowa	115	17,125	3.60	616	3.00	514	100
Kansas	33	20,162	3.45	695	3.13	631	100
Kentucky	1	24,907	4.04	1005	2.89	721	100
Maine	27	16,977	3.54	601	3.10	526	100
Maryland	20	16,547	3.82	632	3.20	530	100
Massachusetts	9	18,469	3.70	683	3.12	576	100
Michigan	14	17,900	3.56	636	2.99	535	100
Minnesota	347	17,969	3.70	664	3.04	546	100
Missouri	74	17,489	3.65	638	3.05	533	100
Nebraska	15	16,744	3.49	585	3.12	522	100
New Hampshire	67	17,606	3.62	637	3.07	540	100
New York	93	18,921	3.46	655	3.03	574	100
North Carolina	4	18,872	3.88	732	3.27	617	100
Ohio	75	15,562	3.38	526	3.07	478	100
Oklahoma	183	16,468	3.37	554	3.05	502	100
Oregon	48	19,775	3.35	663	3.02	598	100
Pennsylvania	106	19,071	3.64	694	3.05	582	100
Rhode Island	1	16,408	3.87	635	3.24	532	100
South Dakota	106	18,400	3.61	664	3.08	567	100
Texas	243	18,752	3.79	710	3.34	625	100
Utah	43	14,691	3.69	542	3.22	473	100
Vermont	69	15,709	3.61	567	3.07	482	100
Virginia	10	20,640	3.45	712	3.04	627	100
Washington	98	19,710	3.15	621	3.02	595	100
West Virginia	1	21,182	3.81	807	3.10	656	100
Wisconsin	268	17,535	3.70	649	3.07	539	100
US	2,723	17,582	3.58	630	3.09	543	>99

 Return to the AIPL Home page

DHI Lactation Averages for Red & White

Table 7. Red & White State and National Standardized Lactation Averages for Cows Calving in 2005 With Records
Used in National Genetic Evaluations.

	Records	Milk	Fat		Protein
State	(no.)	(lb)	(%)	(lb)	(%)	(lb)	Reporting
Alabama	1	33,478	3.57	1196	2.79	934	100
Arkansas	10	17,961	3.40	610	2.92	525	100
California	209	23,972	3.59	860	3.06	722	85
Colorado	11	21,544	3.33	718	3.01	649	100
Florida	1	24,439	3.90	953	2.87	701	100
Georgia	1	21,184	3.51	744	2.79	590	100
Idaho	19	25,104	3.46	869	3.03	760	100
Illinois	73	24,135	3.70	894	2.94	710	100
Indiana	6	28,758	4.31	1239	3.01	867	100
Iowa	35	25,944	3.73	968	3.03	785	100
Kansas	8	19,888	3.73	741	3.18	633	100
Kentucky	21	24,757	3.87	958	3.10	768	100
Maine	4	22,302	3.33	744	2.77	618	100
Maryland	4	23,589	3.43	810	2.96	697	100
Massachusetts	1	24,111	3.43	826	2.75	662	100
Michigan	234	26,086	3.68	959	2.97	775	100
Minnesota	325	23,365	3.67	856	2.96	691	100
Missouri	3	20,239	3.51	710	2.96	599	100
Nebraska	2	22,358	3.65	817	3.07	687	100
New Hampshire	4	26,393	3.54	934	2.85	752	100
New Mexico	1	21,688	3.48	754	2.90	629	100
New York	318	23,184	3.57	828	2.98	691	100
North Carolina	6	21,318	3.66	780	3.08	656	100
North Dakota	7	23,280	3.00	697	2.94	684	100
Ohio	47	22,091	3.70	817	3.03	669	100
Oklahoma	7	19,434	3.29	639	2.97	576	100
Oregon	12	22,923	3.78	866	2.99	686	100
Pennsylvania	367	23,493	3.72	874	3.03	711	100
Puerto Rico	35	12,686	3.71	471	3.10	393	100
South Carolina	117	27,076	3.52	954	3.06	828	100
South Dakota	1	25,918	3.37	874	3.08	797	100
Texas	6	20,460	3.76	770	3.32	679	100
Vermont	13	20,780	3.82	794	2.99	621	100
Virginia	157	22,949	3.61	828	2.99	687	100
Washington	3	29,224	3.12	910	2.94	859	100
Wisconsin	567	24,125	3.61	871	2.96	713	100
US	2,636	23,815	3.63	865	2.99	711	99

 Return to the AIPL Home page

DHI Lactation Averages Over Time

Tables 8A-8F. Summary of National Standardized Lactation Averages

for Cows With Records Used in National Genetic Evaluations.

	Table 8A. Number of Records
	Calving Year
Breed	1980	1990	1995	2000	2001	2002	2003	2004	2005
Ayrshire	13,465	11,576	9,526	7,035	6,552	6,755	6,556	6,190	5,989
Brown Swiss	17,236	17,717	17,721	15,704	15,473	15,639	15,779	15,771	16,029
Guernsey	38,364	25,805	15,420	9,406	8,690	8,293	7,880	7,508	7,248
Holstein	1,109,758	1,720,127	1,769,002	1,624,058	1,588,990	1,589,782	1,564,378	1,597,548	1,650,001
Jersey	63,305	99,416	105,672	106,837	108,934	115,472	115,951	121,343	128,236
Milking Shorthorn	2,302	2,684	2,662	2,407	2,323	2,534	2,619	2,619	2,723
Red and White	900	5,588	6,281	3,927	3,578	3,334	3,002	2,756	2,636

 Return to the AIPL Home page

	Table 8B. Milk (lbs)
	Calving Year
Breed	1980	1990	1995	2000	2001	2002	2003	2004	2005
Ayrshire	13144	14799	15684	17389	17878	17880	17738	17885	18303
Brown Swiss	14172	16250	17493	20300	20694	20869	20715	20757	21405
Guernsey	11666	13297	14051	16043	16410	16398	16469	16692	17154
Holstein	17566	20178	21618	24517	24889	24996	24876	25139	25644
Jersey	11437	13407	14842	17038	17472	17663	17612	17732	18087
Milking Shorthorn	11560	14011	15341	16548	17008	17144	17381	17267	17582
Red and White	16470	18832	20161	22845	22981	23102	22933	23186	23815

 Return to the AIPL Home page

	Table 8C. Fat (%)
	Calving Year
Breed	1980	1990	1995	2000	2001	2002	2003	2004	2005
Ayrshire	3.88	3.85	3.86	3.86	3.84	3.85	3.84	3.8	3.82
Brown Swiss	4.06	3.98	4.01	4.01	4	4.01	3.99	3.99	4
Guernsey	4.6	4.49	4.49	4.46	4.44	4.45	4.44	4.42	4.42
Holstein	3.61	3.61	3.64	3.64	3.63	3.65	3.65	3.64	3.65
Jersey	4.84	4.73	4.64	4.6	4.59	4.61	4.61	4.6	4.62
Milking Shorthorn	3.69	3.58	3.58	3.59	3.57	3.58	3.57	3.57	3.58
Red and White	3.62	3.67	3.68	3.66	3.65	3.65	3.65	3.63	3.63

 Return to the AIPL Home page

	Table 8D. Fat (lbs)
	Calving Year
Breed	1980	1990	1995	2000	2001	2002	2003	2004	2005
Ayrshire	510	570	605	671	687	689	681	680	700
Brown Swiss	576	646	701	814	827	837	827	828	856
Guernsey	536	598	630	716	728	730	731	737	758
Holstein	633	729	786	893	904	911	907	915	936
Jersey	553	634	689	784	802	814	812	815	835
Milking Shorthorn	426	502	549	595	608	614	620	616	630
Red and White	596	692	742	837	839	843	837	842	865

 Return to the AIPL Home page

	Table 8E. Protein (%)
	Calving Year
Breed	1980	1990	1995	2000	2001	2002	2003	2004	2005
Ayrshire		3.16	3.13	3.13	3.12	3.12	3.13	3.13	3.12
Brown Swiss		3.33	3.32	3.31	3.3	3.3	3.31	3.32	3.3
Guernsey		3.3	3.27	3.31	3.29	3.28	3.29	3.29	3.27
Holstein		2.94	2.94	3	3	3	3.01	3.02	3.01
Jersey		3.6	3.56	3.58	3.57	3.55	3.56	3.57	3.57
Milking Shorthorn		3.09	3.07	3.1	3.07	3.08	3.08	3.09	3.09
Red and White		2.95	2.94	2.98	2.97	2.96	2.97	2.98	2.99

 Return to the AIPL Home page

	Table 8F. Protein (lbs)
	Calving Year
Breed	1980	1990	1995	2000	2001	2002	2003	2004	2005
Ayrshire		468	491	545	558	558	555	560	571
Brown Swiss		541	581	672	683	688	685	688	707
Guernsey		439	460	531	540	538	541	549	561
Holstein		592	636	733	745	749	748	758	772
Jersey		482	529	610	625	628	627	633	646
Milking Shorthorn		433	471	512	522	528	535	533	543
Red and White		555	594	680	683	684	682	692	711

 Return to the AIPL Home page