Know more

Our use of cookies

Cookies are a set of data stored on a user’s device when the user browses a web site. The data is in a file containing an ID number, the name of the server which deposited it and, in some cases, an expiry date. We use cookies to record information about your visit, language of preference, and other parameters on the site in order to optimise your next visit and make the site even more useful to you.

To improve your experience, we use cookies to store certain browsing information and provide secure navigation, and to collect statistics with a view to improve the site’s features. For a complete list of the cookies we use, download “Ghostery”, a free plug-in for browsers which can detect, and, in some cases, block cookies.

Ghostery is available here for free: https://www.ghostery.com/fr/products/

You can also visit the CNIL web site for instructions on how to configure your browser to manage cookie storage on your device.

In the case of third-party advertising cookies, you can also visit the following site: http://www.youronlinechoices.com/fr/controler-ses-cookies/, offered by digital advertising professionals within the European Digital Advertising Alliance (EDAA). From the site, you can deny or accept the cookies used by advertising professionals who are members.

It is also possible to block certain third-party cookies directly via publishers:

Cookie type

Means of blocking

Analytical and performance cookies

Realytics
Google Analytics
Spoteffects
Optimizely

Targeted advertising cookies

DoubleClick
Mediarithmics

The following types of cookies may be used on our websites:

Mandatory cookies

Functional cookies

Social media and advertising cookies

These cookies are needed to ensure the proper functioning of the site and cannot be disabled. They help ensure a secure connection and the basic availability of our website.

These cookies allow us to analyse site use in order to measure and optimise performance. They allow us to store your sign-in information and display the different components of our website in a more coherent way.

These cookies are used by advertising agencies such as Google and by social media sites such as LinkedIn and Facebook. Among other things, they allow pages to be shared on social media, the posting of comments, and the publication (on our site or elsewhere) of ads that reflect your centres of interest.

Our EZPublish content management system (CMS) uses CAS and PHP session cookies and the New Relic cookie for monitoring purposes (IP, response times).

These cookies are deleted at the end of the browsing session (when you log off or close your browser window)

Our EZPublish content management system (CMS) uses the XiTi cookie to measure traffic. Our service provider is AT Internet. This company stores data (IPs, date and time of access, length of the visit and pages viewed) for six months.

Our EZPublish content management system (CMS) does not use this type of cookie.

For more information about the cookies we use, contact INRA’s Data Protection Officer by email at cil-dpo@inra.fr or by post at:

INRA
24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

Menu Logo Principal

Home page

Recent developments of dietary phosphorus recommendations

INRA Prod. Anim., 18(3), 175-182.

F. MESCHY ¹, A.-H. RAMIREZ-PEREZ ²

1 UMR, INRA INA-PG, Physiologie de la Nutrition et Alimentation, 16, rue Claude Bernard, F-75231 Paris cedex 05

2 Departemento de Nutrición Animal y Bioquímica, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Circuito Exterior Cd. Universitaria, Colonia de Carmen Coyaocán, México D.F. CP 04510

Abstract 
Recent re-assessments of dietary phosphorus (P) supply for ruminants have been published in France as well as in other countries (USA, The Netherlands, Nordic Countries…). All converge to a decrease by about 15 % of dietary P supply. After a brief reminder of their basis, this article comments on the main consequences of the application of these dietary allowances (DA) that must allow a substantial decrease of P in animal wastes. A decrease of DA associated with differences in P rumen release among feedstuffs update the studies on microbial P requirements. The recent available data do not show any important modification in the metabolism of rumen bacteria related to P supply under normal conditions of saliva production. Special attention must be paid to the assessment of the real P supply by the diet, essentially by its forage fraction. In fact, a decrease of DA associated with an overestimation of P supply could lead to a situation of P deficiency. The strategy of mineral supplementation of the rations must be the same as previously. The formula and quantity to feed the animals remain based on the mineral insufficiencies of the diet. Some oversimplification of these practices (e.g. half quantities of the complement given before with the same concentration in other components) must be discarded because of the risk of a markedly unbalanced supply of other minerals and vitamins. In order to reduce pollutant load with respect to animal performances and health, these new DA must be adopted in a rational way.

Download documents