DECLARE  @Farm         VARCHAR(100),
         @Serial       VARCHAR(100),
         @1StDayPart   DATETIME

DECLARE MyCursor CURSOR FOR

SELECT   DISTINCT
         [Farm],
         [Серия],
         MIN([serv_date]) AS [serv_date]
FROM     [dbo].[Pigs_PartyAnimals_FC]
GROUP BY [Farm],
         [Серия]
ORDER BY [serv_date] ASC

OPEN MyCursor

FETCH NEXT FROM MyCursor
INTO  @Farm, @Serial, @1StDayPart

WHILE @@FETCH_STATUS = 0

BEGIN

EXEC [dbo].[Load_Plan] @Farm, @Serial, @1StDayPart

--SELECT @Farm, @Serial, @1StDayPart

FETCH NEXT FROM MyCursor
INTO  @Farm, @Serial, @1StDayPart

END
CLOSE       MyCursor
DEALLOCATE  MyCursor


/*
EXEC [dbo].[Load_Plan] '000000002', 'Ч1.2020.16.01', '2020-04-15 00:00:00.000'
EXEC [dbo].[Load_Plan] '000000002', 'Ч1.2020.17.01', '2020-04-22 00:00:00.000'
*/