Renal profile and urinary fractional excretion of calcium, phosphorus, and magnesium of lambs fed with different contents of phosphorus

Obstructive urolithiasis is common in confined sheep, and a predominant factor predisposing animals to this condition is nutritional management. The objective of this study was to evaluate the effect of different concentrations of phosphorus (P) on urinalysis, serum urea and creatinine, and serum and urine concentrations of calcium (Ca), P, and magnesium (Mg), as well as to establish the fractional excretion (FE) of these elements in confined lambs. Thirty male Santa Inês x Ile de France sheep at four months of age were divided into two groups according to the diet: Group 1 (G1, n = 15), with 0.43% P in their feed; and Group 2 (G2, n = 15) with 0.65% P. The diets consisting of 10% Coast-cross hay and 90% of a concentrate of soybean meal, wheat, and crushed corn were provided for 90 consecutive days, with water ad libitum. The time points (M) of blood and urine collection were determined as M0, immediately before the beginning of the diet, and at 15-day intervals: M1, M2, M3, M4, M5, and M6. Phosphorous-rich diets favored the appearance of triple phosphate crystals in both groups, causing calculogenesis in more than one third of the animals (11/30), emphasizing the relevance of conducting laboratory tests to aid in urolithiasis diagnosis. In addition, FE revealed an increased renal excretion of excess minerals in the diet, and therefore a greater predisposition for stone formation in relation to nutritional management.

Effect of NPK Fertilization on Tachigali vulgaris L. G. Silva & H. C. Lima Plants

The study on nutritional needs of the tree species T. vulgaris, has a great contribution to the formation and conduction of plantations, resulting in their choice in terms of the potential that has been demonstrated in the comparative trials of fast growing species (more than 0.60 m/year in height) and strong regional demand for firewood and coal. The objective of this study was to evaluate the growth of T. vulgaris in response to the application of nitrogen, phosphorus and potassium, from the beginning of the establishment until the second year after planting. The study was carried out in the municipality of Igarapé-Açu-PA, in a T. vulgaris plantation of 1.44 ha (14,400 m2), spacing of 2 m × 3 m (plants × lines). The treatments consisted in the use of commercial products urea, super triple phosphate and potassium chloride as source of N-nitrogen, phosphorus-P2O5 and potassium-K2O respectively, forming 8 treatmentswhich were analyzed using measures repeated in time. Treatment with combined doses of nitrogen and potassium contributed to a higher growth in height and diameter when compared to plants without fertilization. Fertilization of nitrogen (26.67 g) plus potassium (30 g) contributed to a higher planting growth.

Mineral deposition in tissues of cattle fed with different phosphates and relationships phosphorus: fluorine

Forty-nine male calves were allotted in a randomized design, initially seven replicates per treatment at the end of the experiment were slaughtered four animals per treatment. Treatments CONT: control diet; FBC120: Dicalcium Phosphate 120:1 ratio P: F; MBC60: Monodicalcium phosphate 60:1 ratio P:F; FBC30: Dicalcium Phosphate 30:1 ratio P:F; SFT30: Super triple phosphate 30:1 ratio P:F; FBC10: Dicalcium Phosphate 10:1 ratio P:F; CAR10: concentrated ratio of 10:1 rock Q:F. Phosphates less elaborate showed higher amounts of heavy metals. In bones, iron, aluminum and lead were higher in FBC10 diet, the copper content was higher in animals fed the diet MBC60. Magnesium in liver was higher in animals fed diet FBC30, aluminum was higher for treatments SFT30 and FBC10, FBC120 and the cadmium and lead levels were higher in animals that received STF30. Treatments did not affect phosphorus and fluorine in muscle and heart, being that chromium was higher in the muscle of animals fed diets CAR10 and STF30 while cadmium in heart was greater in diet CAR10. Kidney phosphorus was higher in the animals fed the diet CAR10 and lower dietary FBC10, while aluminum was higher in the animals fed with the diet FBC10 and lower dietary FBC120 and levels of chromium and lead were higher in animals CAR10 diet and lowest in diet MBC60. Alternative sources of phosphorus and low ratios P:F increased the deposition of minerals in bones and liver, and this mineral deposition was lower in the muscles.