271 Revision of the simplified balance method to evaluate phosphorus excretion by growing–finishing pigs

Montminy, M. P. L.; Cloutier, L.; Couture, Catherine; Marcoux, Marie‐Odile; Pomar, C.

doi:10.2527/asasmw.2017.271

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(2011)) where the efficiency of P retention decreased with increasing P intake according to our findings with DXA and chemical methods. Our results confirm that it is possible to use models resulting from the DXA analysis to have a precise evaluation of the dietary P utilization by the fish and especially the amount released in the environment, as it was done in pigs (Létourneau‐Montminy, Couture, Cloutier, Marcoux, & Pomar, 2017).…”

Section: Resultssupporting

confidence: 75%

Assessing body composition and dietary phosphorus retention using Dual‐energy X‐ray absorptiometry (DXA): Application on juvenile rainbow trout, Oncorhynchus mykiss (Walbaum)

et al. 2020

View full text Add to dashboard Cite

Dual‐energy X‐ray absorptiometry (DXA) was evaluated to estimate body composition of rainbow trout (Oncorhynchus mykiss), with an emphasis on phosphorus (P) retention. Ninety rainbow trout (36‐136 g) fed with control (1.10%) or low‐P (0.55%) diets were scanned using a DXA instrument, both frozen and thawed. Whole‐body scans were analysed using the ‘rat whole body’ scan mode. Chemical analyses determined crude lipid and crude protein, water, ash, phosphorus (P) and calcium (Ca). Except for lipid, DXA predicted accurately body composition. The prediction capabilities of the model were assessed by comparing actual and simulated body composition using the generated equations. Results showed good agreement except for lipid and P for which adjusted equations were proposed resulting in highly improved predictions. To predict total carcass P, P retention/excretion, an equation predicting body P was developed and adjusted based on the validation (Body P [g] = −0.087 + 0.103 [BMC] + 0.00336 [lean], R2 = .91, p < .001). Retention and loading estimates for P using models from DXA are similar to those from chemical methods. Our results suggest that DXA can estimate body content of protein, moisture, ash and P; refinement is needed to predict body lipid content.

show abstract

Section: Resultssupporting

confidence: 75%

Assessing body composition and dietary phosphorus retention using Dual‐energy X‐ray absorptiometry (DXA): Application on juvenile rainbow trout, Oncorhynchus mykiss (Walbaum)

et al. 2020

View full text Add to dashboard Cite

show abstract

Calculation Methods of Total Nitrogen and Total Phosphorus Distribution in Pig Manure Fractions

Shalavina

Uvarov

Vasilev

2022

Engineering Technologies and Systems

View full text Add to dashboard Cite

Introduction. The study aims to develop and test a comprehensive calculation methodology in a case study of pilot pig complexes to verify reliability of estimates. The methods are required for reliable tracking of the nutrients flow at the farm level and for adjusting the application doses of resulting solid and liquid organic fertilizers with due account for the crop rotation in place, agrochemical analysis of soils, and specific crops to obtain the target yields. Materials and Methods. Calculations of the content of total nitrogen and total phosphorus in pig manure before separation and in resulting solid and liquid fractions were carried out by the developed method. At that, coefficients from corresponding normative documents and results of previous research were used. Samples of initial material were collected in three replications at two closed-cycle pig rearing complexes located in the Leningrad Region. The experimental data were statistically processed with StatGraphics Centurion v.16 software. Results. The calculated nutrient content of the manure before separation and the separated solid and liquid fractions was compared with the results of laboratory analysis of the physicochemical composition of the manure and its fractions from the selected pig rearing complexes. The difference between the calculated and average actual values of all considered indicators did not exceed 10%, with the differences in nitrogen content turning out to be much bigger (up to 10%) than the differences in phosphorus content (up to 5.7%) in the solid and liquid fractions of pig manure. Discussion and Conclusion. The identified differences can be explained by the instrumental uncertainty and heterogeneity of the analyzed initial material ‒ a mixture of excrement and process water. The results of the study confirmed that the developed method is reliable, and it can be used to account for the nutrients in the solid and liquid organic fertilizers in calculating and adjusting doses for certain crops to produce expected yield and reduce the negative impact on the environment.

show abstract

271 Revision of the simplified balance method to evaluate phosphorus excretion by growing–finishing pigs

Cited by 2 publications

References 0 publications

Assessing body composition and dietary phosphorus retention using Dual‐energy X‐ray absorptiometry (DXA): Application on juvenile rainbow trout, Oncorhynchus mykiss (Walbaum)

Assessing body composition and dietary phosphorus retention using Dual‐energy X‐ray absorptiometry (DXA): Application on juvenile rainbow trout, Oncorhynchus mykiss (Walbaum)

Calculation Methods of Total Nitrogen and Total Phosphorus Distribution in Pig Manure Fractions

Contact Info

Product

Resources

About