[The relationship between udder secretion and the content of blood energy nutriments and nitrogen in the goat at the onset of lactation].
An experiment was performed on 29 dairy goats at the onset of lactation; energy and protein deficits were maximal during the first week of lactation. This was confirmed for energy by the plasma contents on non-esterified fatty acids (NEFA), beta-OH-butyrate and glucose. However, protein deficit was more critical during the second week, as shown by plasma urea, glycine and 3-CH3-histidine contents. At that time, nutritional status depended more on udder production than on intake level. Moreover, the nutritional parameters of body lipid and protein mobilization were positively correlated. Milk protein content was positively correlated with the nutritive balance and status of the goats.
D020155:3-Hydroxybutyric Acid; D000818:Animals; D001786:Blood Glucose / Q000032:analysis; D001798:Blood Proteins / Q000032:analysis*; D004734:Energy Metabolism; D005230:Fatty Acids, Nonesterified / Q000097:blood; D005260:Female; D006041:Goats / Q000097:blood / Q000502:physiology*; D006885:Hydroxybutyrates / Q000097:blood; D007774:Lactation; D008894:Milk Proteins / Q000378:metabolism; D011247:Pregnancy
D001786:Blood Glucose; D001798:Blood Proteins; D005230:Fatty Acids, Nonesterified; D006885:Hydroxybutyrates; D008894:Milk Proteins; D020155:3-Hydroxybutyric Acid
Relations entre les sécrétions mammaires et les teneurs en nutriments énergétiques et azotés sanguins chez la chèvre au début de la lactation.