为找出宁夏肉牛患肾结石的营养学诱因,试验对宁夏肉牛患肾结石的日粮营养成分、结石成分和血液生化指标进行测定.结果表明,40头屠宰的肉牛有23头患肾结石,发病率为57.5％；肉牛日粮的精粗比和钙、磷含量均过高,且钙磷比偏低.通过结石能谱分析,结果显示结石的主要化学成分为磷和镁,初步判断为磷酸镁铵或磷酸镁钾；血液中磷和镁偏高而钙偏低,这说明肉牛日粮的高精粗比、高钙高磷日粮、钙磷比偏低是肉牛肾结石的营养学诱因；日粮镁离子含量对肾结石也可能存在着一定的促进作用.%To find the nutritive incentives of kidney stones on beef cattle in Ningxia, the nutrient content of diet, the element of the kidney stone and the blood biochemical index were measured. The results showed that there were 23 beef cattle detected with kidney stones within 40 samples. The incidence of a disease was 57. 5%. The forage to concentrate ratio, calcium content and phosphorus content in the diet were too high, but calcium-phosphorus ratio in the diet was too low. Stone energy spectrum analysis showed that the main chemical components were phosphorus and magnesium, preliminary judgment for ammonium magnesium phosphate or potassium phosphate magnesium. The serum phosphorus and the serum magnesium were higher than reference standard, while the serum calcium was lower. High forage to concentrate ratio, low calcium-phosphorus ratio and diet with high calcium and high phosphorus were the nutritive incentives of kidney stones on beef cattle in Ningxia. The magnesium content in diet might also have a positive effect on formulation of kidney stone.
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