Resumo

SANTOS, B.R.C. dos; ALFAYA, H.; DIAS, A.E.A.  e  SILVA, J.B. da. Correlation of the phosphorus in the system soil-plant-animal in natural pasture in the Region of Campanha-RS. Arch. zootec. [online]. 2010, vol.59, n.228, pp.487-497. ISSN 1885-4494.

A study was carried out to determine P correlations with landscape characteristics and quality of the fodder plants in the soil-plant-animal system on three types of not disturbed soil, located in the region of Campanha-RS. There were sampled areas on Regolitic Eutrophic Neosol (RLe), Brown Grey Argisol (ABA) and Haplic Eutrophic Planosol (PHe) soils during a year. The linear correlation between soil and plant P was significant in autumn (p<0.01) and winter (p<0.05) for all soils. From soil-plant correlation coefficients among possible influent factors, was derived that Ca, Mg, Fe and Al do not affect P absortion. The Mn influenced negatively the P absorption by plants on RLe (p<0.01) and ABA (p<0.05) soils. The K negatively influenced (p<0.01) the P absorption in ABA soil. In relation to the possible influential factors on P absortion in plant-animal system, Ca did not influenced the animal P absorption in none areas. The Fe negatively affected (p<0.01) the absorption of P in PHe soil and Mn showed positive effect (p<0.01) on the P absorption in PHe soil. The passage of P through soil-plant-animal chain under field conditions is depending on soil type.

Palavras-chave : Absorption; Bovines; Minerals; Sanguineous serum.

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