Feeding of adult egg hens
Up-to-date egg crosses can annually bring up to 330 eggs for a layer. Realisation of genetic potential of productivity is possible only in case of keeping hygiene standards, veterinary and epizootic well-being of the farm and use of a balanced, high-quality animal feeds.

Norms in feeding of egg hens are carried out with regard to their production assignment. According to the content of essential nutrients (protein, amino acids, minerals) feeding of parent hens is identical to the feeding of industrial chickens, for improvement of quality indicators of hatching eggs vitamins rate is increased. In addition, there are restrictions on the entry of certain components (vegetable proteins - rapeseed meal).

For feed economy and reducing of the eggs cost it is recommended to employ a two-phase feeding program for adult hens, taking into account productivity.

In the early production period (20-42 weeks) when the layers continue their growth and egg production and egg weight increase simultaneously, highly nutritive and value feeds are used. In the second phase (43 weeks and more), due to the cessation of growth and reaching the maximum weight of eggs, it is logical to reduce the content of crude protein, limiting amino acids (lysine, methionine), and linoleic acid.

To improve shell quality the level of calcium should be increased and at the level of phosphorus reduced at the same time.

The content of metabolizable energy in this period must remain consistently high. Beginning and peak of production period are the most difficult for the layers. To ensure the continuous increase of egg production the daily rate of feed rises depending on productivity for the week ahead (in advance). Build-up should be less intense (by an average of 3.2 g per week), unlike the pre-laying period.

At productivity peak 120-125 g of feed is consumed in average. This dosage is maintained for further 10-12 weeks, in order to prevent the rapid decline of productivity.

The daily feed rate must be adjusted in accordance with the norms of nutrients worked out for this age, layer’s productivity and cross. It is necessary not only normalize the total amount of protein in the diet (Table 2), but also the content of the limiting amino acids to comply with the proper relation between them.

Particular importance should be attached to mineral nutrition of the layer.

Indicator

Age

Metabolizable energy

21- 45 weeks

46 and more

MJ

1356

1356

Kkal

324

325

Crude protein

20,5

19,5

Calcium

4,5

4,6

Phosphorus:

General

0,87

0,73

Digestible

0,50

0,41

Sodium

0,24

0,24

Lysine

1,0

0,91

Methionine + cystine

0,81

0,75

Linoleic acid

2,12

1,45

Особое значение следует придавать минеральному питанию птицы-несушки.

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