Journal
CURRENT OPINION IN BIOTECHNOLOGY
Volume 23, Issue 6, Pages 872-877Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.copbio.2012.06.001
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Funding
- Sesnon Endowed Chair Program (University of California, Davis)
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Phosphorus (P) is an essential nutrient for livestock but its efficiency of utilization is below 40%, contributing to environmental issues. In this review, we summarize recent approaches to optimize P availability in livestock diets and improve its utilization efficiency. Phase feeding could potentially reduce P excretion by 20%. Addition of phytase enzymes to diets increased P availability from 42 to 95%. Low phytate transgenic plants and transgenic animals increased P availability by 14% and 52-99%, respectively. In practice, a combination of phase feeding and enzymes has the highest potential for P reduction but legislation and ethics implications will prevent using transgenic animals in the short term. Functional and nutritional genomics may provide tools to improve efficiency in the future.
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