This experiment was conducted to investigate the effects of feeding level on major mineral contents and their distribution in Dorper Small-Tail Han male lambs F1. Twenty one lambs were randomly assigned into three groups with 7 replicates in each group and 1 lamb per replicate. Lambs were fed 100% (AL group), 70% (IR70 group) and 40% (IR40 group) of ad libitum, respectively. A slaughter trial was performed when live weight of lambs in AL group reached 35 kg, and Ca, P, Mg, Na and K contents in different tissues were measured. The results showed as follows: body weight gain and weight of bone, muscle, leather, fat and viscera (blood included) were significantly affected by feeding level (AL group>IR70 group>IR40 group) (P<0.05), but fleece weight was not significantly affected (P>0.05); it was only in viscera (blood included) that Ca content of IR70 group was significantly higher than that of IR40 group (P<0.05), and the P content of IR40 group was lower than that of the other two groups (P<0.05); bone was the main storage tissue for Ca, P, Mg and Na, accounting for 98.5%, 83.4%, 71.7% and 41.5% of the total in the body, while K was mainly stored in muscle, accounting for 49.4% of the total in the body. The results indicate that tissue weight of lambs (except for leather) increases with the increasing of feeding level, and major mineral contents of bone, muscle, leather do not change significantly. When lambs are fed at the maintenance requirement, the contents of Ca and P reach the lowest. Bone is the main storage tissue for Ca, P, Mg and Na, and muscle is the main storage tissue for K.
JI Shoukun
,
XU Guishan
,
JIANG Chengang
,
TU Yan
,
LIU Jie
,
ZHAO Yiguang
,
MA Tao
,
LOU Can
,
DENG Kaidong
,
DIAO Qiyu
. Effects of Feeding Levels on Major Mineral Contents and Their Distribution in Dorper Small-Tail Han Lambs F1[J]. Chinese Journal of Animal Nutrition, 2012
, (11)
: 2133
-2140
.
DOI: 10.3969/j.issn.1006-267x.2012.11.010
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