CHANGES IN AMINO-ACID-COMPOSITION OF GOATS MILK DURING THE FIRST MONTH OF LACTATION

In goats of the White Short-wooled breed of the 2nd and higher lactati ons, changes in amino acid composition of milk were studied from the 5 th to the 33rd days of lactation. The amino acids serine, proline, gly cine, alanine, glutamic acid, aspartic acid, arginine, histidine, meth ionine and cystine indicated a gradual and even decline during the per iod under study; in lysine and valine by the 19th day, a moderate decl ine tendency was registered, followed by a sharp drop by the 26th day. In threonine and isoleucine, a sharper drop was registered by the 19t h day of lactation, and in phenylalanine, a very sharp drop occurred b y the 26th day of lactation. From the 26th day of lactation, a gradual decline was registered in all amino acids. During that period, in non -essential amino acids (NEAA), the decline ranged 0.39-10.05%; in esse ntial amino acids (EAA), it ranged 0.79-41.54%. Within the sum of NEAA and the sum of Met + Cys, the decline was gradual and regular. Within the sum of EAA, during the period from the 5th to the 26th days of la ctation, a sharper drop followed by subsequent gradual decline was evi dent.