THE LITTER SIZE AS A FACTOR IN ECONOMIC DEVELOPMENT CONSIDERING LACTATION NUMBER INCREASE IN SAANEN GOAT HERDS

Myrtill Gráff, Edit Mikó, Sándor Kukovics

Abstract


The authors examined the number of the progeny born by each mother-goat, the dates of kidding and the age of females on five Saanen-goat farms. They tried to find out how the increase in the lactation number of the mother affect the number of progeny; in which lactation are these  values the highest and until which lactation is it worth keeping mothers in production. There were 37 does on farm No. 1, 17 on farm No. 2, 45 on farm No. 3, 17 on farm No. 4 and 80-90 on farm No. 5. Based on the results of the examinations they concluded that the average number of progeny was the highest form lactations 3rd to 5th. In case of farm No. 5 the highest progeny value 2.52 (r = 0,37; P < 0,01)  was found in the 5th lactation. The lowest average progeny number (1.40) was observed in the fourth lactation on farm No. 4. When considering all five farms altogether, it was in the fourth lactation that the mothers had the highest number of progeny (2.14), however, the values were high (2,00; 1,85) in lactations 7 and 8 as well. The farm effect proved to be significant in the number of progeny.


Keywords


Saanen goat; number of progeny; lactation number

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References


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LUCRĂRI ȘTIINȚIFICE MANAGEMENT AGRICOL

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