Available phosphorus levels in diets for swine from 15 to 30 kg genetically selected for meat deposition

Alysson Saraiva,Francisco Carlos De Oliveira Silva,Márvio Lobão Teixeira De Abreu,Rita Flávia Miranda De Oliveira,Fabrício De Almeida Santos,Juarez Lopes Donzele

doi:10.1590/s1516-35982009000200013

Alysson Saraiva, Francisco Carlos De Oliveira Silva + Show 4 more

Open Access

https://doi.org/10.1590/s1516-35982009000200013

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Abstract

With the objective to evaluate available phosphorus levels in diets for swine genetically selected for meat deposition, sixty commercial hybrid pigs were used, being 30 castrate males and 30 females, with initial weight of 15.00 ± 0.41 kg, distributed in a completely randomized experimental design, with six treatments, five replications and two animals (1 male and 1 female) per experimental unit. The treatments were composed of a basal diet and other five diets obtained through basal diet supplementation with dicalcium phosphate to obtain six AP levels (0.114; 0.221; 0.328; 0.435; 0.542 and 0.649%). The available phosphorus levels promoted a linear increase in the daily feed intake. Daily weight gain and feed conversion showed a quadratic behavior according to AP levels, with the maximum response at 0.509 and 0.477% of AP in the diet, respectively. Bone strength and bone calcium and phosphorus contents also presented a quadratic behavior according to AP levels, with maximum response at 0.529; 0.619 and 0.596% of AP levels in the diet, respectively. There was no effect of the AP levels in the diets on the bone ash content. The best weight gain and feed conversion observe for castrated male and female pigs from 15 to 30 kg, genetically selected for meat deposition, is provided by 0.509 and 0.477% of available phosphorus levels, respectively, corresponding to daily intakes of 6.39 and 5.93 grams of available phosphorus.

Highlights

In a feeding program, nutritional requirement values close to the demands of animals should be considered in order to avoid excess and deficiency of nutrients
Considering the environmental pollution caused by the excretion of nutrients in regions of intensive swine production and the increasing availability of new genetic strains in the market, the redefinition of the phosphorus requirements for pigs is a constant need, since the deficiency of this mineral affect the growth of animals
This research was carried out to assess the effects of different available phosphorus levels in diets for swine from15 to 30 kg genetically selected for meat deposition

Summary

Introduction

Nutritional requirement values close to the demands of animals should be considered in order to avoid excess and deficiency of nutrients. Genetic selection and market introduction of new pig strains with high potential for meat deposition are causes for concern among nutritionists, since the nutritional. The achievement of satisfactory production rates, as well as animal welfare, depends on the adequate supply of energy and nutrients in the diet. Among these nutrients, phosphorus has required special attention because of its role in the synthesis of body protein. Considering the environmental pollution caused by the excretion of nutrients in regions of intensive swine production and the increasing availability of new genetic strains in the market, the redefinition of the phosphorus requirements for pigs is a constant need, since the deficiency of this mineral affect the growth of animals. This research was carried out to assess the effects of different available phosphorus levels in diets for swine from to 30 kg genetically selected for meat deposition

Material and Methods

Results and Discussion

Conclusions

Literature Cited