Non-conventional P sources for zebu cows in Brazil

Scientia Agricola

D.m.s.s. Vitti²  A.l. Abdalla²  H.o.s. Lopes¹  E.a. Pereira¹  C.f. Meirelles¹ 

[1],USP Centro de Energia Nuclear na Agricultura Piracicaba SP

关键词: phosphorus;    cattle;    rock phosphate;    fluorine;    fósforo;    fosfatos;    flúor;    bovinos;   

DOI  :  10.1590/S0103-90161995000100014

来源: SciELO

【 摘 要 】

To evaluate non-conventional phosphorus sources, a group of 400 Nellore cows mantained under pasture received a mineral mixture with different P sources (group I: superphosphate - 500 ppm P; group II: superphosphate - 340 ppm P plus rock phosphate Patos 160 ppm P; group III: superphosphate 340 ppm P plus dicalcium phosphate 160 ppm P; group IV - dicalcium phosphate 500 ppm P). There were no differences in pregnancy rate, calving rate and calving interval. A fluorine deposition in bone was observed for the treatments with superphosphate and rock phosphate (66.92 ± 15.53; 69.97 ± 6.5 and 64.05 ± 3.35% respectively for group I, II and III). Superphosphate was almost as good dicalcium phosphate to provide phosphorus for grazing cows and there was a potentially significant economic advantage over dicalcium phosphate.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License