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KMID : 1025520120540040291
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Journal of Animal Science and Technology
2012 Volume.54 No. 4 p.291 ~ p.297
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The Effect of Dietary Phytase on Nitrogen and Phosphorus Excretion of Gestating and Lactating Sows
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Hwangbo Jong
Hong Eui-Chul
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Abstract
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This study was carried out to investigate the effect of dietary phytase on nitrogen and phosphorus excretion of gestating and lactating sows(Yorkshire×Landrace×Duroc). Twelve gestating sows and twelve lactating sows were used in this study and were divided into 2 groups(1 control group and 1 treatment group, 6 replications/group) the control group was without phytase and the treatment group was fed with phytase(750 FTU/kg) in the diet, respectively. Body weights of gestating and lactating sows were 208.9±13.8kg and 190.5±22.9kg, respectively. In gestating sows, feed intake was greater in phytase fed group than the control (P<0.05), but water intake and total excretion were not different between the groups. In lactating sows, feed and water intakes and total excretion were not different between the groups. The N intake of lactating sows was higher in phytase fed group than control(P<0.05) but N excretion ratio was not different. In lactating sows, N intake and excretion and N excretion ratio were not significantly different between the groups. P excretion and excretion ratio in gestating sows decreased by phytase treatment (P<0.05) as compared to control. In lactating sows, N intake and excretion was not significantly different by added phytase(P>0.05). Finally, dietary addition of phytase decreased P excretion in feces of gestating and lactating sows.
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KEYWORD
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Gestating sows, Lactating sows, Feed and water intake, Fecal excretion, N and P excretion, Excretion ratio
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