Journal of Food, Agriculture and Environment

The effect of dietary P level on the digestibility and output of P and nitrogen

Author(s):

Y. G. Zhang ¹, Weiming Jiang ^1,2, Lihua Tao ^2*

Recieved Date: 2010-08-07, Accepted Date: 2010-11-02

Abstract:

Five barrows (Duroc × Landrace × Yorkshire) with an average initial body weight of 27.9 kg were used in a 5 × 5 Latin square design to evaluate the effect of different dietary P levels on the digestibility and output of P and nitrogen. The experimental diets contained 5 true digestible P levels (from 0.16% to 0.39%), and the ratio of total calcium to true digestible P (TDP) was 2:1. The results indicated that the true digestibility of P increased (P<0.05) linearly with increasing dietary TDP level below 0.26%. The true P digestibility of dietary TDP level 0.39% (Diet 5) was lower (P<0.05) than dietary TDP level 0.26% (Diet 4). The true P digestibility was highest (56.6%) when dietary TDP was 0.34%. Expressed as g/kg DMI, fecal P output increased (P<0.05) linearly with increasing P input. On the basis of g/kg fecal DM, fecal P output was highest (P<0.05) for Diet 5 and lowest for Diet 4. The apparent digestibility of CP did not differ (P>0.05) among the five diets, the average nitrogen output of 12.14 g/d and nitrogen retention of 66% to 74% (P>0.05). These results suggest that there is no interaction between dietary P and CP protein levels. Therefore, dietary P levels may not affect the digestion and absorption of dietary nitrogen in growing pigs.

Keywords:

True digestible P, nitrogen, P, digestibility, output

---

Journal: Journal of Food, Agriculture and Environment
Year: 2010
Volume: 8
Issue: 3&4
Category: Agriculture
Pages: 348-355

---

Full text for Subscribers

---

Information:

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

---

Purchase this Article:   20 Purchase PDF Order Reprints for 15

---

Share this article :