EFFECT OF SOME FACTORS ON DIRTY LEVEL OF DUCK EGG SHELL AT LAYING DUCK FARMS IN HA TINH

Abstract

This research was carried out in Ha Tinh province from October to November 2018 in order to minimize contamination of dirt on the egg shell in intensive duck farming system with litter floor, after investigated the dirt contamination on egg shell from several duck farms. Experiment 1 was conducted on laying duck farm with 3 different pen size and nest size in order to determine the effect of pen size on dirt shell contamination; experiment 2 was conducted on different flocks in order to determine the last feeding in a day on the dirt shell contamination. Results showed that: The dirt contamination on egg shell collected from several farms was very high, from 34.67 to 63%. In experiment 1: Pen 1 (size 1 x 4 m), pen 3 (3 x 4 m) the dirt contamination levels were 5.16; 6.83; 12.05%, respectively. (pen 1 and pen 2 was significantly different compared to pen 3; p = 0.000); in experiment 2: The dirt contamination on egg shell levels when the last feeding of the day was at 17hr was lower compared to those received the last feeding at 21 hr, this difference was significant (p=0.021). It can be concluded that the small pen size and avoid night feeding would minimize the dirt egg shell.