Reducing phosphorus excretion and loss potential by using a soluble supplement source for swine and poultry. (10th November 2019)

• Record Type: Journal Article
• Authors: Liu, Ling; Guo, Yongqing; Bai, Zhaohai; Cao, Yubo; Tu, Yan; Wang, Zongyong; Li, Yaoji; Wu, Zhiguo; Ma, Lin
• Is Part Of: Journal of cleaner production. Volume 237(2019)
• Publication Date: 2019-11-10
• Subjects: Excretion -- Environmental pollution -- Leaching -- Monogastric animals -- Manure phosphorus fractions; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2019.117654
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Animal diets are often over-supplemented with low bioavailability phosphorus (P) sources in China, resulting in unnecessary excretion and loss of P to the environment. The effect of reducing dietary P supplementation and using a highly available P supplement for swine and poultry was determined. Manure collected in feeding trials involving the use of dicalcium phosphate (DCP) or mono-dicalcium phosphates (MDCP) that were < 1 or 17% water soluble, respectively, to increase dietary total P to amounts ranging from approximately 0.39 to 0.68% was analyzed for total P as well as different forms of P (H2 O-, NaHCO3 -, NaOH-, HCl- and residue-P). Manure total P varied with the amount of P supplemented, ranging from 14.5 to 22.3 g kg −1 for pigs, 4.7–13.6 g kg −1 for broilers and ducks, and 8.0–23.5 g kg −1 for layers. Determined using manure from pigs and birds receiving the highest supplemental amounts, MDCP reduced manure total P by up to 12.1% and H2 O–P by up to 18.4% compared to DCP. Manure P extracted by weak NaOH and HCl was up to 9.4% higher for MDCP than DCP. Thus, using MDCP resulted in manure P that was lower in labile fractions than DCP. Soil leaching studies showed that dissolved P collected in leachate from manure was 9.4–32.6% lower when MDCP replaced DCP in the diet of pigs, broilers, ducks, and layers, confirming that MDCP reduced labile P in manure. Minimizing dietary P supplementation and using highly available MDCP as the supplemental source for pigs, broilers, ducks, and layers reduced P excretion and loss potential to the environment. Graphical abstract: Image 1 Highlights: Manure collected in feeding trials involving the use different feed P supplements. Addition of MDCP in feed, MDCP reduced manure total P by up to 9.7% compare to DCP. Feed animals with MDCP decrease liable H2 O but increase stable NaOH and HCl–P content. Manure P leaching loss was decreased by 9.4–32.6% with MDCP added in feed.