This research was conducted to compare the effects of selenium (Se) supplementation as forms of plant Se—Se-rich alfalfa, inorganic Se—sodium selenite and biological Se—Se-rich yeast on the production performance, egg Se content and conversion rate of laying hens. Three hundred healthy Roman hens, 50 weeks old, were randomly divided into 5 groups with 4 replicates per group and 15 laying hens per replicate. Group 1 was fed a basal diet as control, group 2 was fed the basal diet supplemented with 15 percent of common alfalfa, groups 3 and 4 were fed the group 2 diet supplemented with 1.60 mg/kg sodium selenite and 730 mg/kg Se yeast, respectively, and group 5 was fed the basal diet supplemented with 15 percent of Se-rich alfalfa. The experiment lasted for 38 days. The results showed as follows: 1) the addition of Se-rich alfalfa in the basal diet could significantly increase laying rate and daily egg production (P<0.05), and decrease feed/egg (P<0.05); the addition of Se-rich yeast could also significantly increase laying rate (P<0.05). There was no significant effect on daily egg production and feed/egg with the addition of common alfalfa, sodium selenite and Se-rich yeast (P>0.05). 2) The addition of sodium selenite, Se-rich yeast and Se-rich alfalfa in the basal diet could significantly increase the Se content in egg (P<0.01). The Se content in egg in the group supplemented with Se-rich alfalfa was significantly higher than that in the group supplemented with sodium selenite (P<0.01), but it was significantly lower than that in the group supplemented with Se-rich yeast (P<0.01). The Se content in egg in all groups was increased with experimental time passing. The order of Se conversion rate in egg in the three Se source groups was as follows: Se-rich yeast>Se-rich alfalfa>sodium selenite, however, it was significantly lower than that in the control group (P<0.01). As for as production performance of laying hens, Se-rich alfalfa is slightly superior to Se-rich yeast, but it is very superior to common alfalfa and sodium selenite, Se content in egg in the group supplemented with Se-rich alfalfa is significantly lower than that in the group supplemented with Se-rich yeast, and is significantly higher than that in the group supplemented with sodium selenite; the order of Se conversion rate in the three Se source groups is Se-rich yeast>Se-rich alfalfa> sodium selenite.
HU Huafeng
,
HUANG Yankun
,
JIE Xiaolei
,
GUO Xiao
,
HU Chengxiao
,
LU Jianwei
,
ZHAO Jing
. Effects of Three Kinds of Selenium Sources on Production Performance, Egg Selenium Content and Conversion Rate of Laying Hens[J]. Chinese Journal of Animal Nutrition, 2013
, 25(7)
: 1603
-1609
.
DOI: 10.3969/j.issn.1006-267x.2013.07.026
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