Method for extracting milk and determining a group milk yield based upon a subgroup milk yield
For the milking of animals, in particular cows, in a milking installation comprising a plurality of milking places, a method and a device are proposed wherein the milk yields extracted during a milking session at some milking places or the characteristics corresponding to the milk yields are determined and evaluated and in particular compared with prognoses as to milk yield or characteristics. These measures allow on the one hand that sufficiently accurate data are provided for herd management while on the other hand the investment cost for a milking installation are reduced.
1. A method for determining milk yield for a group of dairy animals, the method comprising the steps of:
providing a milking parlor with a group of milking stalls for milking a group of animals;
providing a plurality of measuring devices in a subgroup of said group of milking stalls, the number of milking stalls in the subgroup being less than the number of milking stalls in the group, such that some of the group of milking stalls have measuring devices and some of the group of milking stalls do not have measuring devices;
milking the dairy animals in the group of milking stalls, wherein the dairy animals being milked within the subgroup of milking stalls define a subgroup of animals;
identifying dairy animals being milked in the subgroup of milking stalls; obtaining a milk yield for the diary animals in the subgroup of animals from the measuring devices;
storing the milk yield for the subgroup of animals in a control device; and
operating the control device to calculate a milk yield for the group of dairy animals using the subgroup milk yield as a factor.
2. The method according to claim 1 , wherein the step of operating the control device to calculate a milk yield for the group of dairy animals is derived from an actual quantity of milk yield extracted from the subgroup of animals.
3. The method according to claim 1 , and further comprising the steps of:
determining a milk yield of an individual animal from the subgroup of animals; and
operating the control device to calculate a milk yield for the group of dairy animals using the individual animal's milk yield as a factor.
4. The method according to claim 3 , and further comprising the step of:
identifying an animal of the subgroup that is representative of the subgroup.
5. The method according to claim 3 , and further comprising the step of:
storing individual animal data to be used as factors in calculating milk yield for the subgroup in the control device.
6. The method according to claim 5 , wherein individual animal data are used as a factor in determining the milk yield for the group of dairy animals.
7. The method according to claim 1 , and further comprising the step of:
deriving a measure for accumulated lactation milk yield for at least one animal of the subgroup of animals to be used in calculating a milk yield for the subgroup of dairy animals.
8. The method according to claim 1 , and further comprising the step of:
deriving a measure for a milk yield from a plurality of milkings for at least one animal of the subgroup of animals.
9. The method according to claim 1 , and further comprising the steps of:
calculating the length of time between milkings; and
using the length of time between milkings as a factor in determining a milk yield for the subgroup of dairy animals.
10. The method according to claim 1 , and further comprising the steps of:
comparing a milk yield prognoses with the milk yield determined for the subgroup of animals; and
using the comparison as a factor in calculating a milk yield for the group of dairy animals.
11. The method according to claim 1 , wherein the step of milking the subgroup of animals comprises the step of:
milking the subgroup of animals with milking devices that number from between about 1% and about 75%, of the total number of milking devices used to milk the group.
12. The method according to claim 1 wherein the step of selecting a subgroup of animals comprises the step of:
selecting dairy animals randomly from the group.
13. The method according to claim 1 , wherein the step of selecting a subgroup of animals comprises the step of:
selecting specific animals known to be representative of the subgroup of dairy animals.
14. The method according to claim 1 , and further comprising the steps of:
selecting a second subgroup of animals that does not include any dairy animals from the subgroup of dairy animals;
milking the second subgroup of animals with milking devices to determine a milk yield during a second milking session for the second subgroup which were not determined during a first milking session; and
operating the control device to calculate a milk yield for the group of animals using the milk yields from the second milking session.
15. The method according to claim 1 , wherein the step of selecting a subgroup of dairy animals, comprises the step of:
selecting animals for the subgroup based on each animal's milk yields over time.
16. The method according to claim 1 , and further comprising the steps of:
comparing the actual milk yield of the subgroup with a milk yield prognoses result of said comparison; and
initiating at least one dairy process as a result of said comparison.
17. The method according to claim 14 , wherein the step of milking the second subgroup of animals with milking devices comprises the step of:
milking the second subgroup with milking devices that number from between about 2% and about 50% of the total number of milking devices used to milk the dairy animals in the group.
18. The method according to claim 1 , wherein the step of milking the subgroup of animals with milking devices comprises the step of:
milking the subgroup of animals with milking devices that number from between about 3% and about 20% of the total number of milking devices used to milk the dairy animals in the group.
19. A method for determining milk yield for a group of dairy animals, the method comprising the steps of:
providing a milking parlor with a first number of milking stalls;
providing a plurality of measuring devices in only a second number of milking stalls, and the second number is smaller than the first number so that some of the milking stalls have measuring devices and some of the milking stalls do not have measuring devices;
milking dairy animals in milking stalls having measuring devices and in milking stalls not having measuring devices;
identifying dairy animals being milked in dairy stalls having measuring devices;
using the measuring devices to obtain milk data from corresponding dairy animals;
transmitting the milk data to a controller for comparison with historical milk data about the corresponding dairy animals; and
using the controller to compare the milk data with the historical milk data about the corresponding dairy animals to derive an estimated milk yield for dairy animals milked in milking stalls not having measuring devices.