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Some factors affecting milk yield

Published online by Cambridge University Press:  27 March 2009

J. Hammond  and
H. G. Sanders
J. Hammond
Affiliation:
Institute of Animal Nutrition, School of Agriculture, Cambridge
H. G. Sanders
Affiliation:
School of Agriculture, Cambridge.
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Extract

(1) The variation of the total yields according to the month of calving is given, and causes for this variation are suggested from the mean lactation curves of cows calving in each month.

(2) A curve showing the effect of pregnancy on the lactation yield has been prepared and corrections are given for different lengths of service periods after calving—“100 days” being chosen as a standard, as that was found to be the average of all service periods obtained, and as it gives a calf at about the same time in the following year.

(3) The variation in yield as the cow gets older has been studied and corrections are given. The maximum yield appears to be reached at the fifth calf; it was found that service periods varied in a definite way with age.

(4) The effect of the dry period before calving on the subsequent yield is shown; “85 days” has been taken as a standard and corrections given accordingly; the standard was the mean of all dry periods obtained, but is probably above the average throughout the country.

(5) By applying these corrections, the variation of individual totals is reduced by approximately 20 per cent, and the number of lactations showing less than 5 per cent, variation is increased by 27·3 per cent.

(6) A brief review of other literature on the subject is given, and the results obtained in this paper are compared with those of other investigators.

The thanks of the authors are due to the members of the Penrith Milk Recording Society for the loan of their registers, which made this investigation possible, and to Mr Garnet, the Live Stock Officer of the district, and the Live Stock Branch, of the Ministry of Agriculture and Fisheries for the collection of the data; the authors are also greatly indebted to Mr G. Udny Yule, M.A., F.R.S., for much assistance in the purely statistical part of the work, and to Dr F. H. A. Marshall, F.R.S., for his advice during the course of the investigation.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 13 , Issue 1 , January 1923 , pp. 74 - 119
Copyright
Copyright © Cambridge University Press 1923

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References

REFERENCES

(1) “Improvement of Live-Stock in England and Wales.” Journ. Bd. of Agric. 26, No. 6, 1919.Google Scholar
(2)Rodewald, . Fühlings Landw. Ztg. No. 9, 1909.Google Scholar
(3)Schmidt, . Arbeit, der Deutsch. Gesell. f. Zuchtungskunde, H. 1, Hanover, 1901.Google Scholar
(4)Woll, . Proc. Soc. Prom. Agric. Sci. 1912.Google Scholar
(5)Peters, . Deut. Landw. Tierzucht, B. 17, No. 21, 1913.Google Scholar
(6)Grady, . Bull. Ohio Exp. Sta. No. 10, 1917.Google Scholar
(7)Nevens, . Journ. Dairy Science, 2, No. 2, 1919.Google Scholar
(8)Beck, . Fjortende Meddelelse fra Forsøgslab. Odense (Denmark), 1920.Google Scholar
(9)Haecker, . Minnesota Exp. Sta. Bull 79, 1903.Google Scholar
(10)Gavin, . “The Interpretation of Milk Records.” J.R.A.S.E. 73, 1912.Google Scholar
(11)Gowin, . Genetics, 5, 1920.Google Scholar
(12)Maynard, and Myers, . New York (Cornell) Sta. Bull. 397, 1918.Google Scholar
(13)Peabl, and Miner, . Journ. Aqri. Res. 17, No. 6, 1919.Google Scholar
(14)Tocher, . Trans. High, and Agric. Soc. of Scotland, 31, 1919, 250.Google Scholar
(15)Vigor, . Journ. Bd. of Agric. and Fisheries, Sup. No. 11, 1913.Google Scholar
(16)Goldschmidt, , Kjeldsen, and Lemming, . Cooperative Exps. with Milk Cows, Copenhagen, 1903–1904. (Ex. Sta. R. xvi, 909.)Google Scholar
(17)Bartlett, . Abstracts of papers, Agri. Edu. Assoc. 12 1921.Google Scholar
(18)Thomson, . British and Colonial Dairying. London, 1913, 276.Google Scholar
(19)Buckley, . Farm Records and Clean Milk. London, 1917.Google Scholar
(20)Plumb, . Indiana Exp. Sta. Bull. 47, 1893.Google Scholar
(21)Richards, and Jordan, . Wisconsin Exp. Sta. 21st Report, 1903–1904.Google Scholar
(22)Davis, . Pennsylvania Exp. Sta. Rpts. 1911–1912 and 1914.Google Scholar
(23)Speir, . Trans. High, and Agric. Soc. of Scotland, 21, 1909.Google Scholar
(24)Kirsten, . Landw. Jahrb. 33, No. 6, 1904.Google Scholar
(25)Wilson, The Breeding and Feeding of Farm Stock, London, 1921, 94.Google Scholar
(26)Johs, , Petersen-Dalum, . Kvaegavl eg Kvaegopdraet, H. 3, Odense (Denmark), 1920, 164.Google Scholar
(27)Jones, . Durham C. C. Offerton Bull. No. 1, 1905.Google Scholar
(28)Murray, . The Chemistry of Cattle Feeding and Dairying, London, 1914, 177.Google Scholar
(29)Brunovsky, . Molotchnoe Khosiaistvo i Skoloiodstvo, 13, No. 38, Moscow, 1914; Abs. Int. Inst. Rome, 6, 1915, 277.Google Scholar
(30)Hopkins, . Biochemical Journal, 14, No. 6, 1920.Google Scholar
(31)Larsen, , Hungerford, and Bailey, . South Dakota Sta. Bull. 175, 1917.Google Scholar
(32)Walker, . Durham C. C. Offerton Bull. No. 4, 1913.Google Scholar
(33)Tangl, and Zaitschek, . Landw. Vers. Stat. 74, 1910.Google Scholar
(34)Koch, . Journ. Landw. 49, No. 1, 1901.Google Scholar
(35)Berry, . Journ. Agric. Sci. 11, 1921.Google Scholar
(36)Pfeiffer, , Einecke, and Schneider, . Mitt. Landw. Inst. Breslau, No. 2, 1905.Google Scholar
(37)Morgen, , Beger, and Westhausser, . Landw. Vers. Stat. 75, Nos. 5 and 6, 1911.Google Scholar
(38)Bryner Jones, . Durham C. C. Offerton Bull. No. 2, 1907.Google Scholar
(39)Henderson, . Pennsylvania Exp. Sta. Rpt. 1916.Google Scholar
(40)Fingerling, . Landw. Vers. Stat. 71, 1909.Google Scholar
(41)Hansen, , Hofmann, , Herweg, and Homberg, , Landw. Jahrb. 35, 1906.Google Scholar
(42)Hart, , Steenbock, and Hoppert, . Science, n.s. 52, No. 1344, 1920.Google Scholar
(43)Meigs, , Blatherwick, and Cary, . Journ. Biol. Chem. 37, No. 1, 1919.Google Scholar
(44)Hays, and Thomas, . Journ. Agr. Res. 19, No. 3, 1920.Google Scholar
(45)Blair Bell, . Proc. Roy. Soc. Med. 1 (II.), 07, 1908, 291.Google Scholar
(46) See Eckles, . Dairy Cattle and Milk Production, New York, 1920, 36.Google Scholar
(47)Woll, . Wisconsin Exp. Sta. Res. Bull. 26, 1912.Google Scholar
(48)Yapp, . Illinois Sta. Bull. 215, 1919.Google Scholar
(49)Gavin, . Journ. Agric. Sci. 5, 1913.Google Scholar
(50)Lederer, and Pribram, . Arch. f. d. Ges. Physiol. 134, 1910.CrossRefGoogle Scholar
(51)Mackenzie, . Q. J. Exp. Physiol. 4, 1911.CrossRefGoogle Scholar
(52)Palmer, and Eckles, . Journ. Dairy Science, 1, No. 3, 1917–1918.Google Scholar
(53)Palmer, and Eckles, . Amer. Journ. Diseases of Children, 13, No. 5, 1917.Google Scholar
(54) Quoted from Larson, and Putney, . Dairy Cattle Feeding and Management, London, 1917, 388.Google Scholar
(55)Eckles, . Missouri Exp. Sta. Bull. 135, 1915.Google Scholar
(56)Towles, . Maryland Exp. Sta. Bull. 217, 1918.Google Scholar
(57)Eckles, . Dairy Cattle and Milk Production, New York, 1920, 149.Google Scholar
(58)Holdaway, . American Naturalist, 50, 1916.CrossRefGoogle Scholar
(59)Gowen, . Maine Exp. Sta. Bull. No. 293, 1920.Google Scholar
(60)Pearl, and Patterson, . Maine Exp. Sta. Bull. No. 262, 1917.Google Scholar
(61)Langmack, . 107de Ber. f. Forsøgslab. Vet. og Landbohøjskoles, Copenhagen, 1921.Google Scholar
(62)Pearl, . Maine Exp. Stat. Rpt. “Animal Husbandry,” No. 519, 1915.Google Scholar
(63)Cabroll, . Utah Exp. Sta. Bull. 127, 1913.Google Scholar
(64)Eckles, . Missouri Exp. Sta. Bull. 100, 1912; and Eckles and Palmer, Missouri Exp. Sta. Bull. 24, 1916.Google Scholar
(65)Hammond, and Hawse, . Journ. Agric. Sci. 8, 1917.Google Scholar
(66)Hart, , Humpheey, and Schaal, . Journ. Biol. Chem. 26, No. 2, 1916.Google Scholar
(67)Ellett, and Holdaway, . Virginia Exp. Sta. Tech. Bull. 20, 1920.Google Scholar
(68)Mellanby, . Proc. Roy. Soc. B. 86, 1913, 88.Google Scholar
(69)Woodman, and Hammond, . Journ. Agric. Sci. 12, 1922.Google Scholar
(70)Wilson, . Sci. Proc. Boy. Dublin Soc. 17, 12 1922.Google Scholar