Nitrogen and phosphorus excretion on commercial rabbit farms: calculations based on the input-output balance.

 L. Maertens, C. Cavani, M. Petracci

Abstract

Manure is no longer exclusively considered as a fertiliser in areas with high densities of farm animals. Efforts are being made to reduce mineral excretion or to stimulate a more environmentalfriendly use. In such a context, both from the governmental side and for the producer, a reliable calculation of the on-farm production is very useful. Based on the balance between input (feed) - output (produced rabbits, dead rabbits), the nitrogen and phosphorus on farm excretion have been calculated for different production systems, production levels and slaughter weights. For a closed farm (breeding + fattening) the most convenient expression of mineral excretion is per female on average present on the farm. The excretion amounts to 7.42 kg N and 4.76 kg P2O5 per doe/year on a commercial rabbit farm based on an average production/doe of 45 fatteners of 2.5 kg. The excretion decreases from 76 to 61 g N and from 48 to 40 g P2O5 /kg rabbit produced with increasing productivity of the farm (35 vs 50 delivered fatteners/doe/year, respectively). In an exclusively fattening unit (between 0.8 and 2.5 kg weight and a feed conversion ratio of 3.40), the excretion amounts to 38 g N and 26 g P2O5, per kg rabbit produced.

Keywords

rabbits; nitrogen; phosphorous; excretion; farm

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Cited-By (articles included in Crossref)

This journal is a Crossref Cited-by Linking member. This list shows the references that citing the article automatically, if there are. For more information about the system please visit Crossref site

1. Urine features used to survey nitrogen excretion in rabbits
L. Gasco, L. Rotolo, G. Masoero, B. Miniscalbo, I. Zoccarato
World Rabbit Science  vol: 22  issue: 3  first page: 187  year: 2014  
doi: 10.4995/wrs.2014.1200



 

 Universitat Politècnica de València

 

Official journal of the World Rabbit Science Association (WRSA)

 

e-ISSN: 1989-8886     ISSN: 1257-5011   https://doi.org/10.4995/wrs