Studies in Milk Secretion. VI. on the Variations and Correlations of Butter-Fat Percentage with Age in Jersey Cattle.
نویسنده
چکیده
PAGE ................................................................. INTRODUCTION 250 Material and methods ........................................................ 251 Variation of butter-fat percentage in Jersey milk with the age when the test was made ........................................................... 252 Analytical constants describing the variation of butter-fat percentage at different ages ............................................................ AI The correlation of Jersey eight-months butter-fat percentage with age of the cow at commencement of test ............................................ 270 The correlation between the butter-fat percentage of one lactation and that of . succeeding lactations ................................................ 274 The influence of the length of t5me the cow is retained in the herd on the mean butter-fat percentage of a given age ........................... 276 The standard deviation of the butter-fat percentage as influenced by the length of time .the cow is retained in the herd ................................ 282 The coefficients of variation of butter-fat percentage as influenced by the time the cow is retained in the herd ...................................... 288 The correlation of the butter-fat percentage for eight-months milk yield at a given age with the like butter-fat percentage of any other age.. ...... 292 The regression of the butter-fat percentage of lactations at different ages one on the other ......................................................... 302 The correlation of the butter-fat percentage of a lactation at a given age with the butter-fat percentage of two lactations.. ............................... 305 Correlation between the mean butter-fat percentage of the first five lactations and the mean butter-fat percentage of the individual lactations. ............... 309 The influence of environmental changes on the butter-fat percentage from lacta-
منابع مشابه
Studies in Milk Secretion. V. on the Variations and Correlations of Milk Secretion with Age.
TABLE O F CONTENTS INTRODUCTION ................................................................ I I I Material and methods ........................................................ 112 Variation of Jersey milk production with age at commencement of test.. ........ I14 Analytical constants describing the variation of milk production at different ages.. 119 The correlation of Jersey 8-months milk...
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ورودعنوان ژورنال:
- Genetics
دوره 5 3 شماره
صفحات -
تاریخ انتشار 2003