Yumurta tavuklarında zorlamalı tüy dökümü yöntemleri

Yumurtacı tavuklarda yumurtlama döneminin sonunda yumurta verimi ve kalitesi önemli derecede azaldığından bazı üreticiler verimi artırmak ve eldeki sürüden bir dönem daha ekonomik olarak yararlanmak için sürüyü zorlamalı tüy dökümüne sokarlar. Tüy dökümünü sağlayan pek çok yöntem vardır. Bunlar yemin uzaklaştırılması, suyun uzaklaştırılması, ışık süresinin azaltılması, düşük düzeyde kalsiyum yada düşük düzeyde sodyumla, yüksek düzeyde çinko yada iyot ile yemleme, dane arpa veya yulaf kullanılması ve bazı ilaç-hormonların verilmesidir. İkinci yumurtlama döneminde yumurta büyüklüğü, kabuk kalitesi ve iç kalite tüy dökümü öncesindeki döneme göre artmaktadır.

Force molting methads in laying hens

At the end of the laying cycle, production and quality of egg decline significantly in laying hens. Therefore, some producers attempt to induce a molt in the flocks to improve performance and to have economic benefits associated with additional egg laying cycles. There are a number of methods for molting including feed withdrawal, water withdrawal, photoperiodic reduction, feeding with low calcium or low sodium, feeding high dietary zinc or high iodine, feeding with whole-grain barley or oat and feeding with some drugs-hormones. In the second laying cycle, the egg size, shell quality and internal egg quality were improved compared with those in premolting period.

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