Effects of Dietary Manganese Supplemental Level on Serum Biochemical Indexes, Metatarsal Bone Contents and Apparent Digestibility of Manganese and Iron of Weaned Pigs

WEI Maolian, YANG Weiren, ZHANG Guiguo, JIANG Shuzhen, GUO Wenwen

doi:10.3969/j.issn.1006-267x.2015.02.027

2015 , Vol. 27 >Issue 2: 551 - 558

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.02.027

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Effects of Dietary Manganese Supplemental Level on Serum Biochemical Indexes, Metatarsal Bone Contents and Apparent Digestibility of Manganese and Iron of Weaned Pigs

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College of Animal Science and Technology, Shandong Agricultural University, Tai'an 271018, China

Received date: 2014-08-08

Online published: 2015-02-09

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Abstract

This trial was conducted to evaluate the effects of manganese supplemental level on growth performance, serum biochemical indexes, metatarsal bone contents of manganese and iron, and apparent digestibility of manganese and iron of weaned pigs, then to find the appropriate supplemental level of manganese. A total of one hundred and sixty healthy weaned pigs (Duroc×Landrace×Largewhite) with an average of (9.84±0.85) kg were randomly divided into 5 groups with 4 replicates in each group and 8 piglets per replicate. The control group was fed a basal diet, and the experimental groups were fed the basal diet supplemented with 4, 20, 40, and 80 mg/kg manganese for 35 days. The results showed as follows: 1) manganese supplemental level had no significant effects on average daily gain, average daily feed intake, the ratio of feed to gain and the serum biochemical indexes of weaned piglets (P>0.05). 2) Manganese supplemental level had significant effects on metatarsal bone contents of manganese and iron (P<0.05), and the content of iron significantly decreased as linear and quadratic with the increase of dietary manganese supplemental level (P<0.05). When manganese supplemental level was above 4 mg/kg, the metatarsal bone content of iron decreased. 3) Fecal output of manganese and iron was significantly increased with the rise of dietary manganese supplemental level (P<0.05), and when manganese supplemental level was above 80 mg/kg, the apparent digestibility of iron was significantly lower than that in the control group (P<0.05). It is concluded that dietary manganese supplemental level can not significantly promote growth performance and serum biochemical indexes, and with manganese supplemental level increasing, the output of iron has increased, and the metatarsal bone content of iron has decreased when manganese supplemental level is above 4 mg/kg. Taking all the indicators into consideration, the suitable dietary manganese supplemental level for weaned piglets is 4 to 20 mg/kg.

Key words： manganese; weaned piglets; bone; apparent digestibility

Cite this article

WEI Maolian, YANG Weiren, ZHANG Guiguo, JIANG Shuzhen, GUO Wenwen . Effects of Dietary Manganese Supplemental Level on Serum Biochemical Indexes, Metatarsal Bone Contents and Apparent Digestibility of Manganese and Iron of Weaned Pigs[J]. Chinese Journal of Animal Nutrition, 2015 , 27(2) : 551 -558 . DOI: 10.3969/j.issn.1006-267x.2015.02.027

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